/* CSS Custom Properties for theming */
:root {
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-card: #252525;
    --bg-input: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #666666;
    --accent-primary: #3b82f6;
    --accent-primary-rgb: 59, 130, 246;
    --accent-secondary: #60a5fa;
    --accent-secondary-rgb: 96, 165, 250;
    --accent-success: #22c55e;
    --accent-warning: #f59e0b;
    --accent-error: #ef4444;
    --border-color: #333333;
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.35s ease;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-card);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body.app-loading {
    overflow: hidden;
}

.app-splash {
    position: fixed;
    inset: 0;
    z-index: 3000;
    display: grid;
    place-items: center;
    padding: var(--spacing-xl);
    background:
        radial-gradient(circle at 50% 18%, rgba(var(--accent-secondary-rgb), 0.2), transparent 24%),
        radial-gradient(circle at 78% 84%, rgba(var(--accent-primary-rgb), 0.18), transparent 20%),
        linear-gradient(180deg, #0d1524 0%, #101722 48%, #090d14 100%);
    transition: opacity 0.55s ease, visibility 0.55s ease;
}

.app-splash.is-hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.app-splash__brand {
    display: grid;
    justify-items: center;
    gap: 1.1rem;
    text-align: center;
    animation: splashEnter 0.72s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.app-splash__icon {
    position: relative;
    width: min(30vw, 8.75rem);
    aspect-ratio: 0.8;
    display: grid;
    justify-items: center;
    align-content: start;
    padding: 0.75rem 0.75rem 0.9rem;
    border-radius: 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.16);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.04)),
        linear-gradient(180deg, rgba(10, 16, 26, 0.96), rgba(16, 23, 34, 0.96));
    box-shadow:
        0 20px 80px rgba(0, 0, 0, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.12);
    transform: rotate(-7deg);
}

.app-splash__icon::before,
.app-splash__icon::after {
    content: '';
    position: absolute;
    border-radius: 999px;
    filter: blur(18px);
}

.app-splash__icon::before {
    inset: auto 10% -0.8rem;
    height: 1rem;
    background: rgba(var(--accent-primary-rgb), 0.35);
}

.app-splash__icon::after {
    inset: -0.8rem 24% auto;
    height: 2.6rem;
    background: rgba(var(--accent-secondary-rgb), 0.22);
}

.app-splash__icon-top {
    width: 34%;
    height: 0.35rem;
    margin-bottom: 0.6rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.22);
}

.app-splash__icon-screen {
    width: 100%;
    height: 2.7rem;
    margin-bottom: 0.65rem;
    border-radius: 0.8rem;
    background:
        linear-gradient(135deg, rgba(186, 230, 253, 0.2), rgba(59, 130, 246, 0.55)),
        linear-gradient(180deg, rgba(9, 18, 28, 0.96), rgba(11, 22, 35, 0.96));
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.14);
    position: relative;
    overflow: hidden;
}

.app-splash__icon-screen::before {
    content: '';
    position: absolute;
    inset: 0.55rem;
    border-radius: 0.6rem;
    background:
        linear-gradient(90deg, transparent 0 56%, rgba(255, 255, 255, 0.18) 56% 58%, transparent 58% 100%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.14), transparent 52%),
        rgba(10, 26, 40, 0.72);
}

.app-splash__icon-keys {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.4rem;
}

.app-splash__icon-keys span {
    display: block;
    aspect-ratio: 1;
    border-radius: 0.65rem;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.04)),
        rgba(28, 37, 50, 0.96);
    border: 1px solid rgba(255, 255, 255, 0.06);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
    animation: splashKeyPulse 1.6s ease-in-out infinite;
}

.app-splash__icon-keys span:nth-child(3n) {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.04)),
        rgba(var(--accent-primary-rgb), 0.35);
}

.app-splash__icon-keys span:nth-child(2),
.app-splash__icon-keys span:nth-child(5),
.app-splash__icon-keys span:nth-child(8) {
    animation-delay: 0.15s;
}

.app-splash__icon-keys span:nth-child(3),
.app-splash__icon-keys span:nth-child(6),
.app-splash__icon-keys span:nth-child(9) {
    animation-delay: 0.3s;
}

.app-splash__title {
    max-width: 16ch;
    font-size: clamp(1.2rem, 5vw, 1.9rem);
    font-weight: 600;
    letter-spacing: 0.04em;
    line-height: 1.2;
    color: var(--text-primary);
    text-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

@keyframes splashEnter {
    from {
        opacity: 0;
        transform: translateY(18px) scale(0.96);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes splashKeyPulse {
    0%,
    100% {
        transform: translateY(0);
        opacity: 0.9;
    }
    50% {
        transform: translateY(-2px);
        opacity: 1;
    }
}

/* Main Container */
.container {
    width: 100%;
    max-width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    padding: 0;
    gap: 0;
}

/* Row Styling */
.row,
.row2 {
    width: 100%;
    max-width: none;
    background: transparent;
    border-radius: 0;
    padding: var(--spacing-lg);
    box-shadow: none;
    border: none;
    backdrop-filter: none;
}

/* Header Section */
.header-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    margin-bottom: var(--spacing-md);
}

.header-controls .menu-toggle {
    margin-left: auto;
}

h1 {
    font-size: clamp(1.25rem, 5vw, 1.75rem);
    font-weight: 600;
    color: var(--accent-secondary);
}

/* Date Display */
.date {
    font-size: clamp(0.7rem, 2.5vw, 0.85rem);
    font-family: 'Roboto Mono', monospace;
    color: var(--text-secondary);
    background: var(--bg-input);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    display: inline-block;
    margin-bottom: var(--spacing-md);
}

/* Offline Indicator */
.offline-indicator {
    display: none;
    background: linear-gradient(135deg, var(--accent-warning), #d97706);
    color: var(--bg-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    margin-bottom: var(--spacing-md);
    text-align: center;
    font-size: 0.875rem;
    font-weight: 500;
    animation: pulse 2s infinite;
    box-shadow: var(--shadow-sm);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

/* Intro Text */
.intro {
    color: var(--text-secondary);
    font-size: clamp(0.75rem, 2.5vw, 0.875rem);
    margin-bottom: 0;
}

.rates-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.rates-toggle {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.45rem 0.75rem;
    background: transparent;
    color: var(--accent-secondary);
    border: 1px solid rgba(var(--accent-secondary-rgb), 0.35);
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.rates-toggle:hover {
    border-color: var(--accent-primary);
    background: rgba(var(--accent-primary-rgb), 0.08);
}

.rates-toggle-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 0.9rem;
    height: 0.9rem;
    flex-shrink: 0;
    font-size: 0.9rem;
    line-height: 1;
    transition: transform var(--transition-normal);
}

.rates-toggle[aria-expanded="true"] .rates-toggle-icon {
    transform: rotate(180deg);
}

.exchange-rates-panel[hidden] {
    display: none;
}

/* Exchange Rate Cards */
.exchange-rate {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.7rem 0.85rem;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.exchange-rate:hover {
    border-color: rgba(var(--accent-secondary-rgb), 0.35);
    background: rgba(255, 255, 255, 0.04);
}

.exchange-rate p {
    font-size: clamp(0.78rem, 2.6vw, 0.9rem);
    font-weight: 500;
    color: var(--text-secondary);
    margin: 0;
}

.currency-code {
    color: var(--accent-secondary);
    font-weight: 600;
    font-size: 0.78rem;
    letter-spacing: 0.03em;
}

/* Currency Grid */
.currency-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    width: 100%;
    margin-bottom: var(--spacing-lg);
}

.currency-grid button {
    background: var(--bg-input);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    font-size: clamp(0.875rem, 3vw, 1rem);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    min-height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.currency-grid button:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.currency-grid button.selected {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-color: var(--accent-primary);
    color: white;
    box-shadow: 0 0 20px rgba(var(--accent-primary-rgb), 0.3);
}

.currency-grid button:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Calculator Section */
.calculator {
    display: none;
    flex-direction: column;
    gap: var(--spacing-md);
    width: 100%;
    padding: var(--spacing-xl);
    background: var(--bg-input);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    animation: slideUp 0.3s ease;
}

.selected-currency-pair {
    color: var(--accent-secondary);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 0.4rem;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.calculator input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-radius: var(--border-radius-md);
    font-size: clamp(1rem, 4vw, 1.25rem);
    font-weight: 500;
    transition: all var(--transition-normal);
}

.calculator input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px rgba(var(--accent-primary-rgb), 0.2);
}

.calculator input::placeholder {
    color: var(--text-muted);
}

.calculator button {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border: none;
    border-radius: var(--border-radius-md);
    font-size: clamp(1rem, 3.5vw, 1.125rem);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    min-height: 52px;
}

.calculator button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.calculator button:active {
    transform: translateY(0);
}

.calculator button:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 2px;
}

.button-group {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.calculator button {
    flex: 1;
}

.reset-button {
    background: var(--bg-secondary) !important;
    color: var(--text-secondary) !important;
    border: 1px solid var(--border-color) !important;
}

.reset-button:hover {
    background: var(--bg-tertiary) !important;
    color: var(--text-primary) !important;
}

#conversion-result {
    margin-top: var(--spacing-md);
    font-size: clamp(1rem, 3.5vw, 1.25rem);
    font-weight: 600;
    text-align: center;
    min-height: 1.5em;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--border-radius-md);
    color: var(--accent-success);
}

/* Language Switcher */
.language-switcher {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.language-switcher label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.language-switcher select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--border-color);
    background: var(--bg-input);
    color: var(--text-primary);
    border-radius: var(--border-radius-sm);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.language-switcher select:hover {
    border-color: var(--accent-primary);
}

.language-switcher select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(var(--accent-primary-rgb), 0.2);
}

/* Hamburger Menu Toggle */
.menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    padding: 0;
    background: transparent;
    border: 1px solid rgba(var(--accent-secondary-rgb), 0.35);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    flex-shrink: 0;
}

.menu-toggle:hover {
    border-color: var(--accent-primary);
    background: rgba(var(--accent-primary-rgb), 0.08);
}

.menu-toggle:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 2px;
}

.menu-toggle-icon {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4px;
    width: 16px;
    height: 16px;
}

.menu-toggle-icon span {
    display: block;
    width: 16px;
    height: 2px;
    background: var(--accent-secondary);
    border-radius: 2px;
    transition: all var(--transition-normal);
    transform-origin: center;
}

.menu-toggle[aria-expanded="true"] .menu-toggle-icon span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-toggle-icon span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.menu-toggle[aria-expanded="true"] .menu-toggle-icon span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

/* Navigation Menu Panel */
.nav-menu {
    width: 100%;
    overflow: hidden;
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-sm);
    animation: slideDown 0.2s ease;
}

.nav-menu[hidden] {
    display: none;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Language inside menu */
.nav-menu-language {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.nav-menu-language-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.nav-menu-divider {
    height: 1px;
    background: var(--border-color);
    margin-bottom: var(--spacing-md);
}

/* Nav list */
.nav-menu-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.6rem 0.75rem;
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.nav-item:hover {
    background: rgba(var(--accent-primary-rgb), 0.08);
    color: var(--accent-secondary);
}

.nav-item:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 2px;
}

.nav-item-icon {
    font-size: 1rem;
    flex-shrink: 0;
    width: 1.5rem;
    text-align: center;
}

.nav-item-label {
    flex: 1;
}

.coming-soon-badge {
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-muted);
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    padding: 0.15rem 0.45rem;
}

/* Version Info */
.section-title {
    font-size: clamp(0.875rem, 3vw, 1rem);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.section-header .section-title {
    margin-bottom: 0;
}

.history-link,
.page-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 0.8rem;
    border: 1px solid rgba(var(--accent-secondary-rgb), 0.35);
    border-radius: 999px;
    color: var(--accent-secondary);
    text-decoration: none;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    transition: all var(--transition-normal);
}

.history-link:hover,
.page-link:hover {
    border-color: var(--accent-primary);
    background: rgba(var(--accent-primary-rgb), 0.08);
}

.history-page {
    gap: var(--spacing-md);
}

.simple-page-header {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.8rem;
    margin-bottom: var(--spacing-md);
}

.simple-back-link {
    align-self: flex-start;
}

.landing-page {
    justify-content: center;
}

.landing-shell {
    padding-top: max(var(--spacing-xl), env(safe-area-inset-top));
}

.landing-hero {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.landing-intro {
    max-width: 48rem;
    color: var(--text-secondary);
    font-size: clamp(0.95rem, 2.8vw, 1.1rem);
    line-height: 1.8;
}

.landing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
}

.landing-card {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
    min-height: 12.5rem;
    padding: 1.1rem;
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.08);
    background:
        radial-gradient(circle at top right, rgba(var(--accent-secondary-rgb), 0.18), transparent 42%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.02));
    color: var(--text-primary);
    text-decoration: none;
    transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.landing-card:hover {
    transform: translateY(-4px);
    border-color: rgba(var(--accent-secondary-rgb), 0.35);
    box-shadow: var(--shadow-md);
}

.landing-card:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 2px;
}

.landing-card-icon {
    font-size: 1.6rem;
    line-height: 1;
}

.landing-card-title {
    font-size: 1rem;
    font-weight: 600;
}

.landing-card-text {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.65;
    flex: 1;
}

.landing-card-cta {
    color: var(--accent-secondary);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

@media (prefers-reduced-motion: reduce) {
    .app-splash,
    .app-splash__brand,
    .app-splash__icon-keys span {
        transition: none;
        animation: none;
    }
}

.calc-page-shell {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.calc-screen-card {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    min-height: 20rem;
    padding: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--border-radius-lg);
    background: #000;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.calc-screen-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.calc-screen-label {
    color: var(--text-secondary);
    font-size: 0.76rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.calc-screen-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.2rem;
    height: 1.2rem;
    color: #4b5563;
    font-size: 0.8rem;
    line-height: 1;
}

.calc-clear-screen-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0;
    border: none;
    background: transparent;
    color: #9ca3af;
    font-size: 0.76rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    cursor: pointer;
    transition: color var(--transition-fast), opacity var(--transition-fast);
}

.calc-clear-screen-btn::before {
    content: '⌫';
    font-size: 0.85rem;
    line-height: 1;
}

.calc-clear-screen-btn:hover {
    color: #e5e7eb;
}

.calc-clear-screen-btn:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 4px;
    border-radius: var(--border-radius-sm);
}

.calc-history {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
    flex: 1;
    min-height: 10rem;
    max-height: none;
    overflow-y: auto;
    padding-right: 0.2rem;
}

.calc-history-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.75rem;
    align-items: end;
    padding: 0.7rem 0.8rem;
    border-radius: var(--border-radius-md);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.calc-history-expression {
    min-width: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem;
}

.calc-history-number {
    border: none;
    background: transparent;
    color: #f3f4f6;
    font-family: 'Roboto Mono', monospace;
    font-size: 0.98rem;
    font-weight: 600;
    cursor: pointer;
    padding: 0.18rem 0.25rem;
    border-radius: 0.45rem;
}

.calc-history-number:hover {
    color: #fff;
    background: rgba(var(--accent-primary-rgb), 0.16);
}

.calc-history-number:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 2px;
    border-radius: var(--border-radius-sm);
}

.calc-history-operator {
    color: #6b7280;
    font-family: 'Roboto Mono', monospace;
    font-size: 0.9rem;
}

.calc-history-value {
    align-self: center;
    color: var(--accent-secondary);
}

.calc-history-empty {
    color: #6b7280;
    font-size: 0.9rem;
    line-height: 1.6;
    padding: 0.5rem 0;
}

.calc-live-row {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    min-height: 5.5rem;
    padding: 0.35rem 0;
    border-radius: 0;
    background: transparent;
    border: none;
}

.calc-expression {
    font-family: 'Roboto Mono', monospace;
    color: #fff;
    font-size: clamp(2rem, 6vw, 3rem);
    font-weight: 500;
    line-height: 1.2;
    text-align: right;
    word-break: break-all;
}

.calc-keypad {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.7rem;
}

.calc-key {
    min-height: 3.8rem;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--border-radius-md);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
    font-family: 'Roboto Mono', monospace;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.calc-key:hover {
    transform: translateY(-1px);
    border-color: rgba(var(--accent-secondary-rgb), 0.3);
    background: rgba(255, 255, 255, 0.06);
}

.calc-key:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 2px;
}

.calc-key--muted {
    color: var(--text-secondary);
}

.calc-key--accent {
    color: var(--accent-secondary);
    background: rgba(var(--accent-primary-rgb), 0.08);
}

.calc-key--equal {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #fff;
    border-color: transparent;
}

.calc-key--wide {
    grid-column: span 2;
}

.history-top-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.history-header {
    display: flex;
    justify-content: flex-start;
    align-items: flex-start;
    margin-bottom: var(--spacing-lg);
}

.history-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    max-width: 36ch;
    margin-top: 0.35rem;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.history-group {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.history-group-title {
    color: var(--text-secondary);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.history-group-list {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.history-card {
    padding: 1rem 1.1rem;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
}

.history-card-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: 0.55rem;
}

.history-card-meta {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.history-currencies {
    color: var(--accent-secondary);
    font-weight: 600;
    font-size: 0.82rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.history-date {
    color: var(--text-muted);
    font-size: 0.78rem;
    font-family: 'Roboto Mono', monospace;
    text-align: right;
}

.history-item-delete {
    padding: 0.35rem 0.6rem;
    border: 1px solid rgba(239, 68, 68, 0.32);
    border-radius: 999px;
    background: rgba(239, 68, 68, 0.1);
    color: #fca5a5;
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.history-item-delete:hover {
    background: rgba(239, 68, 68, 0.16);
    border-color: rgba(239, 68, 68, 0.46);
}

.history-equation {
    font-size: clamp(1rem, 2.6vw, 1.15rem);
    font-weight: 600;
    line-height: 1.4;
}

.history-empty {
    padding: 1.5rem;
    border: 1px dashed var(--border-color);
    border-radius: var(--border-radius-md);
    background: rgba(255, 255, 255, 0.02);
    text-align: center;
}

.history-empty h2 {
    font-size: 1rem;
    margin-bottom: 0.4rem;
}

.history-empty p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.danger-button {
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.35);
    color: #fca5a5;
}

.danger-button:hover {
    background: rgba(239, 68, 68, 0.18);
    border-color: rgba(239, 68, 68, 0.5);
}

.danger-button:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

body.modal-open {
    overflow: hidden;
}

.modal-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    background: rgba(6, 8, 18, 0.72);
    backdrop-filter: blur(8px);
    z-index: 1000;
}

.modal-overlay[hidden] {
    display: none;
}

.modal-dialog {
    width: min(100%, 26rem);
    padding: 1.25rem;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--border-radius-lg);
    background: linear-gradient(180deg, #1d1d1d, #151515);
    box-shadow: var(--shadow-lg);
}

.modal-title {
    font-size: 1.05rem;
    margin-bottom: 0.5rem;
}

.modal-message {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.5;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

.modal-cancel-button {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-secondary);
    border-color: rgba(255, 255, 255, 0.1);
}

.modal-cancel-button:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.18);
}

.modal-confirm-button {
    min-width: 8.5rem;
}

.exchange-rates {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    width: 100%;
}

.version-info {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    text-align: center;
    padding: var(--spacing-sm);
    font-size: 0.75rem;
    color: var(--text-muted);
    opacity: 0.7;
    pointer-events: none;
}

/* Coming Soon Placeholder Page */
.coming-soon-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    gap: var(--spacing-md);
    text-align: center;
    min-height: 260px;
}

.coming-soon-icon {
    font-size: 3rem;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.coming-soon-page-title {
    font-size: clamp(1.25rem, 5vw, 1.75rem);
    font-weight: 600;
    color: var(--accent-secondary);
}

.coming-soon-page-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    max-width: 28ch;
    margin-bottom: var(--spacing-sm);
}

/* Active nav item (current page) */
.nav-item[aria-current="page"] {
    color: var(--accent-secondary);
    background: rgba(var(--accent-primary-rgb), 0.08);
}

/* Utility Classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Mobile Responsiveness */
@media (max-width: 480px) {
    .row,
    .row2 {
        padding: 1rem;
    }

    .landing-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.75rem;
    }

    .landing-card {
        min-height: 10.5rem;
        padding: 0.9rem;
    }

    .landing-card-text {
        font-size: 0.8rem;
        line-height: 1.5;
    }

    .header-controls {
        margin-bottom: 0.75rem;
    }

    h1 {
        font-size: 1.05rem;
    }

    .language-switcher select {
        padding: 0.4rem 0.65rem;
        font-size: 0.8rem;
    }

    .date {
        padding: 0.4rem 0.65rem;
        margin-bottom: 0.75rem;
        font-size: 0.72rem;
    }

    .offline-indicator {
        margin-bottom: 0.75rem;
        padding: 0.4rem 0.65rem;
        font-size: 0.78rem;
    }

    .currency-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .exchange-rate {
        padding: 0.65rem 0.75rem;
    }

    .rates-toolbar {
        align-items: center;
        flex-direction: row;
        flex-wrap: wrap;
        gap: 0.5rem;
        margin-bottom: 0.5rem;
    }

    .intro {
        flex: 1 1 11rem;
        font-size: 0.72rem;
        line-height: 1.35;
    }

    .rates-toggle {
        padding: 0.35rem 0.6rem;
        font-size: 0.68rem;
    }

    .history-header,
    .history-top-actions {
        flex-direction: column;
        align-items: flex-start;
    }

    .section-header {
        flex-direction: row;
        align-items: center;
    }

    .history-link {
        margin-left: auto;
    }

    .history-top-actions {
        width: 100%;
    }

    .history-top-actions .page-link,
    .history-top-actions .danger-button {
        width: 100%;
    }

    .modal-actions {
        flex-direction: column-reverse;
    }

    .modal-actions .page-link,
    .modal-actions .danger-button {
        width: 100%;
    }

    .history-date {
        text-align: left;
    }

    .history-card-meta {
        width: 100%;
        justify-content: space-between;
    }

    .history-card-head {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.35rem;
    }

    .mobile-picker-sheet {
        padding: 1rem;
    }

    .mobile-picker-option {
        padding: 0.9rem 0.9rem;
    }
}

/* Safe-area full-bleed layout */
@media (max-width: 768px), (display-mode: standalone) {
    body {
        background: var(--bg-card);
        min-height: 100dvh;
    }

    .container {
        min-height: 100dvh;
        padding: 0;
        gap: 0;
        align-items: stretch;
    }

    .row,
    .row2 {
        max-width: none;
        width: 100%;
        background: transparent;
        border: none;
        border-radius: 0;
        box-shadow: none;
        backdrop-filter: none;
        padding:
            max(var(--spacing-lg), env(safe-area-inset-top))
            max(var(--spacing-md), env(safe-area-inset-right))
            max(var(--spacing-lg), env(safe-area-inset-bottom))
            max(var(--spacing-md), env(safe-area-inset-left));
    }

    .version-info {
        padding-bottom: max(var(--spacing-sm), env(safe-area-inset-bottom));
    }

    .landing-page {
        padding: var(--spacing-sm);
    }

    .landing-shell {
        padding: 1rem;
    }

    .landing-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .unit-select-group.mobile-picker-enhanced select {
        display: none;
    }

    .unit-select-group.mobile-picker-enhanced .mobile-picker-trigger {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 0.8rem;
        width: 100%;
        min-height: 3.35rem;
        padding: 0.8rem 1rem;
        border: 2px solid var(--border-color);
        border-radius: var(--border-radius-md);
        background:
            linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0)),
            var(--bg-secondary);
        color: var(--text-primary);
        font: inherit;
        text-align: left;
    }

    .mobile-picker-trigger-copy {
        display: flex;
        flex-direction: column;
        min-width: 0;
    }

    .mobile-picker-trigger-title {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        font-size: 0.95rem;
        font-weight: 600;
    }

    .mobile-picker-trigger-icon {
        flex-shrink: 0;
        color: var(--accent-secondary);
        font-size: 1rem;
    }

    .mobile-picker-overlay {
        align-items: flex-end;
        padding: 0;
        background: rgba(6, 8, 18, 0.78);
    }

    .mobile-picker-sheet {
        width: 100%;
        max-width: none;
        max-height: min(82dvh, 46rem);
        padding-bottom: max(1rem, env(safe-area-inset-bottom));
        border-right: none;
        border-bottom: none;
        border-left: none;
        border-radius: 1.4rem 1.4rem 0 0;
        background: linear-gradient(180deg, #1f1f1f, #141414);
    }
}

@media (max-width: 360px) {
    .landing-grid {
        grid-template-columns: 1fr;
    }
}

/* Tablet Layout */
@media (min-width: 481px) and (max-width: 768px) {
    .currency-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Desktop Layout */
@media (min-width: 769px) {
    html {
        min-width: 600px;
        min-height: 750px;
    }

    body {
        padding: var(--spacing-xl) var(--spacing-lg);
    }

    .container {
        width: min(100%, 800px);
        max-width: 800px;
        margin: 0 auto;
    }

    .currency-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-md);
    }

    .currency-grid button {
        padding: var(--spacing-lg);
    }
}

/* Large Desktop */
@media (min-width: 1024px) {
    html {
        min-width: 680px;
        min-height: 820px;
    }
}

/* ── Length Calculator ──────────────────────────────────────────────────── */
.length-intro {
    font-size: clamp(0.75rem, 2.5vw, 0.875rem);
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.unit-pair {
    display: flex;
    align-items: flex-end;
    gap: var(--spacing-sm);
    width: 100%;
    margin-bottom: var(--spacing-lg);
}

.unit-select-group {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    flex: 1;
    min-width: 0;
}

.unit-select-group label {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.unit-group-chip {
    align-self: flex-start;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    max-width: 100%;
    min-height: 1.65rem;
    padding: 0.25rem 0.7rem;
    border-radius: 999px;
    border: 1px solid rgba(var(--accent-secondary-rgb), 0.26);
    background: linear-gradient(180deg, rgba(var(--accent-primary-rgb), 0.18), rgba(var(--accent-primary-rgb), 0.08));
    color: var(--accent-secondary);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.unit-select-group select {
    width: 100%;
    min-height: 3.35rem;
    padding: 0.8rem 2.65rem 0.8rem var(--spacing-md);
    border: 2px solid var(--border-color);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0)),
        var(--bg-secondary);
    color: var(--text-primary);
    border-radius: var(--border-radius-md);
    font-size: clamp(0.85rem, 2.8vw, 0.95rem);
    font-family: 'Poppins', sans-serif;
    font-weight: 500;
    line-height: 1.35;
    text-overflow: ellipsis;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image:
        linear-gradient(45deg, transparent 50%, rgba(255, 255, 255, 0.72) 50%),
        linear-gradient(135deg, rgba(255, 255, 255, 0.72) 50%, transparent 50%),
        linear-gradient(180deg, rgba(var(--accent-primary-rgb), 0.1), rgba(var(--accent-primary-rgb), 0));
    background-position:
        calc(100% - 1.15rem) calc(50% - 0.18rem),
        calc(100% - 0.8rem) calc(50% - 0.18rem),
        100% 0;
    background-size: 0.38rem 0.38rem, 0.38rem 0.38rem, 3rem 100%;
    background-repeat: no-repeat;
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.unit-select-group select optgroup {
    color: var(--accent-secondary);
    font-weight: 700;
    font-style: normal;
}

.unit-select-group select option {
    color: var(--text-primary);
    background: var(--bg-secondary);
}

.unit-select-group select:hover {
    border-color: rgba(var(--accent-secondary-rgb), 0.6);
}

.unit-select-group select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px rgba(var(--accent-primary-rgb), 0.2);
}

.mobile-picker-trigger {
    display: none;
}

.unit-select-group[data-unit-group="metric"] .unit-group-chip {
    border-color: rgba(var(--accent-primary-rgb), 0.28);
}

.unit-select-group[data-unit-group="imperial"] .unit-group-chip,
.unit-select-group[data-unit-group="imperial_nautical"] .unit-group-chip,
.unit-select-group[data-unit-group="imperial_us"] .unit-group-chip {
    border-color: rgba(245, 158, 11, 0.3);
    background: linear-gradient(180deg, rgba(245, 158, 11, 0.18), rgba(245, 158, 11, 0.08));
    color: #fbbf24;
}

.unit-select-group[data-unit-group="traditional"] .unit-group-chip {
    border-color: rgba(34, 197, 94, 0.28);
    background: linear-gradient(180deg, rgba(34, 197, 94, 0.16), rgba(34, 197, 94, 0.08));
    color: #4ade80;
}

.mobile-picker-overlay {
    z-index: 1400;
}

.mobile-picker-sheet {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1.1rem;
}

.mobile-picker-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
}

.mobile-picker-header-copy {
    min-width: 0;
}

.mobile-picker-label {
    margin-bottom: 0.35rem;
    color: var(--text-secondary);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.mobile-picker-title {
    margin-bottom: 0;
    color: var(--text-primary);
    line-height: 1.3;
}

.mobile-picker-close {
    flex-shrink: 0;
    width: 2.5rem;
    height: 2.5rem;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
    font-size: 1.45rem;
    line-height: 1;
    cursor: pointer;
}

.mobile-picker-groups {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    overflow: auto;
    min-height: 0;
}

.mobile-picker-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.mobile-picker-group-title {
    position: sticky;
    top: 0;
    z-index: 1;
    margin: 0;
    padding: 0.4rem 0.1rem;
    color: var(--accent-secondary);
    background: linear-gradient(180deg, rgba(21, 21, 21, 0.96), rgba(21, 21, 21, 0.82));
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.mobile-picker-options {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}

.mobile-picker-option {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.9rem;
    width: 100%;
    padding: 0.95rem 1rem;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 1rem;
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
    text-align: left;
    cursor: pointer;
}

.mobile-picker-option.is-selected {
    border-color: rgba(var(--accent-primary-rgb), 0.55);
    background: rgba(var(--accent-primary-rgb), 0.12);
    box-shadow: inset 0 0 0 1px rgba(var(--accent-primary-rgb), 0.2);
}

.mobile-picker-option-text {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    min-width: 0;
}

.mobile-picker-option-primary {
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.35;
}

.mobile-picker-option-secondary {
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-family: 'Roboto Mono', monospace;
}

.mobile-picker-option-check {
    flex-shrink: 0;
    color: var(--accent-secondary);
    font-size: 1rem;
}

.swap-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.4rem;
    height: 2.4rem;
    flex-shrink: 0;
    margin-bottom: 0.1rem;
    background: rgba(var(--accent-primary-rgb), 0.08);
    border: 1px solid rgba(var(--accent-secondary-rgb), 0.35);
    border-radius: var(--border-radius-sm);
    color: var(--accent-secondary);
    font-size: 1.15rem;
    line-height: 1;
    cursor: pointer;
    transition: background var(--transition-normal), border-color var(--transition-normal), transform var(--transition-normal);
}

.swap-btn:hover {
    background: rgba(var(--accent-primary-rgb), 0.18);
    border-color: var(--accent-primary);
    transform: rotate(180deg);
}

.swap-btn:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 2px;
}

.length-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-radius: var(--border-radius-md);
    font-size: clamp(1rem, 4vw, 1.2rem);
    font-weight: 500;
    font-family: 'Roboto Mono', monospace;
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
    margin-bottom: var(--spacing-md);
}

.length-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px rgba(var(--accent-primary-rgb), 0.2);
}

.length-input::placeholder {
    color: var(--text-muted);
    font-family: 'Poppins', sans-serif;
    font-size: clamp(0.875rem, 3vw, 1rem);
}

/* Remove number input arrows */
.length-input::-webkit-outer-spin-button,
.length-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.length-input[type=number] { appearance: textfield; -moz-appearance: textfield; }

.length-btn-group {
    display: flex;
    gap: 10px;
    margin-bottom: var(--spacing-md);
}

.length-convert-btn,
.length-reset-btn {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius-md);
    font-size: clamp(0.95rem, 3.5vw, 1.1rem);
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    transition: all var(--transition-normal);
    min-height: 52px;
}

.length-convert-btn {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #fff;
}

.length-convert-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.length-convert-btn:active {
    transform: translateY(0);
}

.length-convert-btn:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 2px;
}

.length-reset-btn {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.length-reset-btn:hover {
    color: var(--text-primary);
    border-color: rgba(var(--accent-secondary-rgb), 0.4);
}

.length-reset-btn:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 2px;
}

.length-result {
    min-height: 3rem;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--border-radius-md);
    font-size: clamp(0.95rem, 3.5vw, 1.1rem);
    font-weight: 600;
    text-align: center;
    font-family: 'Roboto Mono', monospace;
    transition: color var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.length-result-ok {
    color: var(--accent-success);
}

.length-result-error {
    color: var(--accent-error);
    font-family: 'Poppins', sans-serif;
    font-size: clamp(0.82rem, 2.8vw, 0.9rem);
    font-weight: 500;
}

/* ── BMI Calculator ──────────────────────────────────────────────────────── */
.bmi-unit-toggle {
    display: flex;
    gap: 0;
    width: 100%;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}

.bmi-unit-btn {
    flex: 1;
    padding: 0.65rem var(--spacing-md);
    background: transparent;
    color: var(--text-secondary);
    border: none;
    font-size: clamp(0.875rem, 3vw, 1rem);
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.bmi-unit-btn--active {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #fff;
}

.bmi-unit-btn:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: -3px;
}

.bmi-inputs {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.bmi-field {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.bmi-field label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.bmi-input {
    margin-bottom: 0 !important;
}

.bmi-imperial-height {
    display: flex;
    gap: var(--spacing-sm);
}

.bmi-imperial-height .bmi-input {
    flex: 1;
}

/* Result box */
.bmi-result-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    animation: slideUp 0.3s ease;
}

.bmi-score-row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
}

.bmi-score-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.bmi-score {
    font-family: 'Roboto Mono', monospace;
    font-size: clamp(2rem, 8vw, 3rem);
    font-weight: 500;
    line-height: 1;
    transition: color var(--transition-normal);
}

.bmi-category-badge {
    display: inline-flex;
    align-self: flex-start;
    padding: 0.35rem 0.9rem;
    border-radius: 999px;
    font-size: clamp(0.82rem, 2.8vw, 0.9rem);
    font-weight: 600;
    color: #fff;
    transition: background var(--transition-normal);
}

/* Gauge */
.bmi-gauge {
    position: relative;
    padding-bottom: 1.4rem;
}

.bmi-gauge-track {
    display: flex;
    height: 10px;
    border-radius: 999px;
    overflow: hidden;
    gap: 2px;
}

.bmi-gauge-seg {
    flex: 1;
    border-radius: 3px;
    opacity: 0.85;
}

.bmi-seg-underweight { background: #60a5fa; flex: 1.5; }
.bmi-seg-normal      { background: #22c55e; flex: 3.25; }
.bmi-seg-overweight  { background: #f59e0b; flex: 2.5; }
.bmi-seg-obese1      { background: #f97316; flex: 2.5; }
.bmi-seg-obese2      { background: #ef4444; flex: 2.5; }
.bmi-seg-obese3      { background: #991b1b; flex: 1; }

.bmi-gauge-needle {
    position: absolute;
    top: -4px;
    width: 3px;
    height: 18px;
    background: #fff;
    border-radius: 2px;
    transform: translateX(-50%);
    transition: left 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 0 6px rgba(0,0,0,0.5);
    left: 0%;
}

.bmi-gauge-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 0.4rem;
    font-size: 0.65rem;
    color: var(--text-muted);
    font-family: 'Roboto Mono', monospace;
    padding: 0 2px;
}

/* Category table */
.bmi-table {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.bmi-table-title {
    font-size: clamp(0.9rem, 3vw, 1rem);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
    background: none;
    -webkit-text-fill-color: var(--text-secondary);
}

.bmi-table-row {
    display: grid;
    grid-template-columns: 0.6rem 3.5rem 1fr;
    grid-template-rows: auto auto;
    column-gap: var(--spacing-sm);
    row-gap: 0.1rem;
    padding: 0.65rem var(--spacing-md);
    border-radius: var(--border-radius-md);
    background: rgba(255,255,255,0.02);
    border: 1px solid transparent;
    transition: border-color var(--transition-normal), background var(--transition-normal);
}

.bmi-table-row--active {
    border-color: rgba(var(--accent-secondary-rgb), 0.4);
    background: rgba(var(--accent-primary-rgb), 0.07);
}

.bmi-table-dot {
    grid-row: 1 / 3;
    align-self: center;
    width: 0.6rem;
    height: 0.6rem;
    border-radius: 50%;
    flex-shrink: 0;
}

.bmi-table-range {
    font-size: 0.7rem;
    font-family: 'Roboto Mono', monospace;
    color: var(--text-muted);
    align-self: center;
}

.bmi-table-name {
    font-size: clamp(0.82rem, 2.8vw, 0.9rem);
    font-weight: 600;
    color: var(--text-primary);
    align-self: center;
}

.bmi-table-desc {
    grid-column: 2 / 4;
    font-size: clamp(0.72rem, 2.3vw, 0.78rem);
    color: var(--text-secondary);
    line-height: 1.5;
}

.bmi-disclaimer {
    font-size: clamp(0.68rem, 2.2vw, 0.75rem);
    color: var(--text-muted);
    line-height: 1.6;
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-sm);
    margin-top: var(--spacing-xs);
    font-style: italic;
}

/* ── Alcohol BAC Calculator ──────────────────────────────────────────────── */
.alc-section-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

/* Preset chips */
.alc-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.alc-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.4rem 0.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    color: var(--text-primary);
    font-size: clamp(0.78rem, 2.5vw, 0.85rem);
    font-family: 'Poppins', sans-serif;
    font-weight: 500;
    cursor: pointer;
    transition: border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

.alc-chip:hover,
.alc-chip:focus-visible {
    border-color: var(--accent-primary);
    background: rgba(var(--accent-primary-rgb), 0.12);
    outline: none;
}

.alc-chip:active {
    transform: scale(0.95);
}

.alc-chip--custom {
    border-style: dashed;
    color: var(--text-secondary);
}

/* Empty message */
.alc-empty-msg {
    font-size: clamp(0.78rem, 2.5vw, 0.85rem);
    color: var(--text-muted);
    text-align: center;
    padding: var(--spacing-md) 0;
    font-style: italic;
}

/* Drink list */
.alc-drink-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

.alc-drink-head {
    display: grid;
    grid-template-columns: 6.5rem 1.4rem 1fr 3.5rem 3.5rem 2rem;
    align-items: end;
    gap: var(--spacing-xs);
    padding: 0 var(--spacing-sm);
    margin-bottom: 0.35rem;
}

.alc-drink-head span {
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.alc-drink-head-time {
    text-align: center;
}

.alc-drink-head-vol,
.alc-drink-head-abv {
    text-align: center;
}

.alc-drink-row {
    display: grid;
    grid-template-columns: 6.5rem 1.4rem 1fr 3.5rem 3.5rem 2rem;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 0.5rem var(--spacing-sm);
    animation: slideUp 0.2s ease;
}

.alc-drink-icon {
    font-size: 1.1rem;
    text-align: center;
    line-height: 1;
}

.alc-drink-name {
    font-size: clamp(0.78rem, 2.5vw, 0.85rem);
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.alc-time-input {
    font-family: 'Roboto Mono', monospace;
    font-size: 0.85rem;
    padding: 0.35rem 0.5rem;
    margin-bottom: 0 !important;
    text-align: center;
}

.alc-num-input {
    font-family: 'Roboto Mono', monospace;
    font-size: 0.82rem;
    padding: 0.35rem 0.4rem;
    margin-bottom: 0 !important;
    text-align: center;
}

.alc-input-cell {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.15rem;
}

.alc-input-unit {
    font-size: 0.58rem;
    font-weight: 600;
    color: var(--text-muted);
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    line-height: 1;
}

.alc-remove-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    line-height: 1;
    cursor: pointer;
    padding: 0.2rem 0.3rem;
    border-radius: var(--border-radius-sm);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.alc-remove-btn:hover {
    color: var(--accent-error);
    background: rgba(239, 68, 68, 0.1);
}

/* Profile section */
.alc-profile {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.alc-profile-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
}

.alc-profile-label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    flex-shrink: 0;
}

/* Gender toggle */
.alc-gender-toggle,
.alc-food-toggle {
    display: flex;
    gap: 0;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
    background: var(--bg-input);
}

.alc-gender-btn,
.alc-food-btn {
    padding: 0.4rem 1rem;
    background: transparent;
    color: var(--text-secondary);
    border: none;
    font-size: 0.85rem;
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 2.5rem;
}

.alc-gender-btn--active,
.alc-food-btn--active {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #fff;
}

.alc-gender-btn:focus-visible,
.alc-food-btn:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: -3px;
}

/* Weight input inside profile */
.alc-weight-input {
    max-width: 8rem;
    margin-bottom: 0 !important;
    text-align: right;
    font-family: 'Roboto Mono', monospace;
}

/* Result card */
.alc-result-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    animation: slideUp 0.3s ease;
}

.alc-result-main {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.alc-result-label-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.alc-result-label {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.alc-status-badge {
    display: inline-flex;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: clamp(0.72rem, 2.3vw, 0.8rem);
    font-weight: 600;
    color: #fff;
    transition: background var(--transition-normal);
}

.alc-bac-value {
    font-family: 'Roboto Mono', monospace;
    font-size: clamp(2.2rem, 9vw, 3.2rem);
    font-weight: 500;
    line-height: 1;
    transition: color var(--transition-normal);
}

.alc-zero-row {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-sm);
    margin-top: var(--spacing-xs);
}

.alc-zero-label {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    flex-shrink: 0;
}

.alc-zero-time {
    font-family: 'Roboto Mono', monospace;
    font-size: clamp(1.1rem, 4vw, 1.4rem);
    font-weight: 500;
    color: var(--accent-success);
}

.alc-updated-note {
    font-size: clamp(0.65rem, 2vw, 0.7rem);
    color: var(--text-muted);
    font-style: italic;
    text-align: right;
}

/* Future check */
.alc-future-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.alc-future-section .alc-section-label {
    margin-top: 0;
    margin-bottom: var(--spacing-sm);
}

.alc-future-day-toggle {
    display: inline-flex;
    gap: 0;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
    background: var(--bg-input);
    margin-bottom: var(--spacing-sm);
}

.alc-future-day-btn {
    padding: 0.4rem 0.9rem;
    background: transparent;
    color: var(--text-secondary);
    border: none;
    font-size: 0.82rem;
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.alc-future-day-btn--active {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #fff;
}

.alc-future-day-btn:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: -3px;
}

.alc-future-row {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.alc-future-btn {
    flex-shrink: 0;
    padding: 0.55rem 1.2rem;
}

.alc-future-result {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    min-height: 1.8rem;
}

.alc-future-label {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.alc-future-value {
    font-family: 'Roboto Mono', monospace;
    font-size: 1.3rem;
    font-weight: 500;
    transition: color var(--transition-normal);
}

.alc-future-badge {
    display: inline-flex;
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    color: #fff;
}

/* Footer note / help */
.alc-footer-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.45rem;
    padding-top: var(--spacing-xs);
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-sm);
}

.alc-legal-note {
    font-size: clamp(0.65rem, 2.1vw, 0.72rem);
    color: var(--text-muted);
    line-height: 1.6;
    font-style: italic;
}

.alc-help-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    color: var(--accent-secondary);
    text-decoration: none;
    font-size: 0.76rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    transition: color var(--transition-normal), opacity var(--transition-normal);
}

.alc-help-link::before {
    content: 'i';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 0.95rem;
    height: 0.95rem;
    border: 1px solid currentColor;
    border-radius: 50%;
    font-size: 0.65rem;
    font-weight: 700;
    line-height: 1;
}

.alc-help-link:hover {
    color: var(--accent-primary);
}

/* Alcohol info page */
.info-page {
    gap: var(--spacing-md);
}

.info-page .row {
    max-width: 820px;
}

.info-top-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.info-header {
    margin-bottom: var(--spacing-lg);
}

.info-acronym {
    color: var(--accent-secondary);
    font-size: clamp(0.78rem, 2.5vw, 0.88rem);
    line-height: 1.5;
    margin-top: 0.35rem;
    margin-bottom: 0.55rem;
}

.info-subtitle {
    color: var(--text-secondary);
    font-size: clamp(0.85rem, 2.8vw, 1rem);
    line-height: 1.7;
    max-width: 50rem;
}

.info-callout {
    background: rgba(245, 158, 11, 0.08);
    border: 1px solid rgba(245, 158, 11, 0.25);
    color: #fcd34d;
    border-radius: var(--border-radius-md);
    padding: 0.85rem 1rem;
    margin-bottom: var(--spacing-lg);
    font-size: clamp(0.8rem, 2.6vw, 0.9rem);
    line-height: 1.65;
}

.info-grid {
    display: grid;
    gap: var(--spacing-md);
}

.info-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
}

.info-card h2 {
    font-size: clamp(1rem, 3vw, 1.15rem);
    margin-bottom: 0.7rem;
    color: var(--text-primary);
}

.info-card p,
.info-list li {
    color: var(--text-secondary);
    font-size: clamp(0.82rem, 2.7vw, 0.92rem);
    line-height: 1.75;
}

.info-card p + p {
    margin-top: 0.75rem;
}

.info-formula {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 0.9rem 1rem;
    margin: 0.85rem 0;
    font-family: 'Roboto Mono', monospace;
    font-size: clamp(0.75rem, 2.5vw, 0.85rem);
    color: var(--accent-secondary);
    display: grid;
    gap: 0.4rem;
}

.info-list {
    padding-left: 1.1rem;
    display: grid;
    gap: 0.55rem;
}

.settings-shell {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    max-width: 54rem;
    margin: 0 auto;
}

.settings-intro {
    max-width: 44rem;
    color: var(--text-secondary);
    font-size: clamp(0.9rem, 2.8vw, 1rem);
    line-height: 1.75;
}

.settings-grid {
    display: grid;
    gap: var(--spacing-md);
}

.settings-card {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    background:
        radial-gradient(circle at top right, rgba(var(--accent-secondary-rgb), 0.15), transparent 42%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.02));
}

.settings-card-head {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.settings-card-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: rgba(var(--accent-primary-rgb), 0.12);
    font-size: 1.15rem;
    flex-shrink: 0;
}

.settings-card-title {
    font-size: clamp(1rem, 3vw, 1.1rem);
    margin-bottom: 0.2rem;
    color: var(--text-primary);
}

.settings-card-help {
    color: var(--text-secondary);
    font-size: 0.86rem;
    line-height: 1.65;
}

.settings-field-label {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.settings-select,
.settings-color-input {
    border: 2px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-radius: var(--border-radius-md);
}

.settings-select {
    width: 100%;
    padding: 0.95rem 1rem;
    font: inherit;
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.settings-select:hover,
.settings-color-input:hover {
    border-color: rgba(var(--accent-secondary-rgb), 0.5);
}

.settings-select:focus,
.settings-color-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px rgba(var(--accent-primary-rgb), 0.2);
}

.settings-accent-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.settings-color-input {
    width: 4.25rem;
    min-width: 4.25rem;
    height: 3rem;
    padding: 0.3rem;
    cursor: pointer;
}

.settings-accent-code {
    display: inline-flex;
    align-items: center;
    min-height: 3rem;
    padding: 0 0.95rem;
    border-radius: var(--border-radius-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--accent-secondary);
    font-family: 'Roboto Mono', monospace;
    font-size: 0.95rem;
    font-weight: 600;
}

.settings-preview {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    padding: 0.95rem 1rem;
    border-radius: var(--border-radius-md);
    background: rgba(var(--accent-primary-rgb), 0.08);
    border: 1px solid rgba(var(--accent-secondary-rgb), 0.35);
}

.settings-preview-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--accent-secondary);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.settings-preview-button {
    padding: 0.65rem 1.1rem;
    border: none;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #fff;
    font: inherit;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.03em;
}

.settings-reset-button {
    align-self: flex-start;
}

/* Landscape Mode on Mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .container {
        flex-direction: column;
        flex-wrap: nowrap;
        justify-content: flex-start;
        align-items: stretch;
    }

    .row,
    .row2 {
        max-width: none;
        flex: 1 1 auto;
    }
}

/* Dark Mode Enhancement */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #000000;
        --bg-secondary: #0a0a0a;
        --bg-card: #141414;
        --bg-input: #1a1a1a;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --border-color: #ffffff;
        --text-secondary: #ffffff;
    }

    .currency-grid button {
        border-width: 3px;
    }
}

/* Print Styles */
@media print {
    body {
        background: white;
        color: black;
    }

    .row,
    .row2 {
        box-shadow: none;
        border: 1px solid #ccc;
    }

    .calculator {
        display: none !important;
    }
}

/* Focus Visible for Accessibility */
*:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Skip to Main Content Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--accent-primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: 100;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}

/* Loading State */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}