/* assets/css/style.css - COMPLETE MOBILE RESPONSIVE VERSION */

:root {
    --bg-dark: #050816;
    --bg-card: #0b1020;
    --bg-card-alt: #111827;
    --bg-soft: #1f2937;
    --accent: #6366f1;
    --accent-soft: rgba(99, 102, 241, 0.15);
    --accent-strong: #4f46e5;
    --danger: #f97373;
    --success: #22c55e;
    --text-main: #f9fafb;
    --text-muted: #9ca3af;
    --border-subtle: #1f2937;
    --radius-lg: 16px;
    --radius-pill: 999px;
    --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.6);
    --font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

    --header-height: 64px;
    --footer-height: 32px;
    --sidebar-width: 280px;
    
    /* Mobile-first responsive values */
    --spacing-xs: clamp(8px, 2vw, 12px);
    --spacing-sm: clamp(12px, 3vw, 16px);
    --spacing-md: clamp(16px, 4vw, 24px);
    --spacing-lg: clamp(20px, 5vw, 32px);
    
    --font-size-xs: clamp(12px, 3vw, 14px);
    --font-size-sm: clamp(14px, 3.5vw, 16px);
    --font-size-base: clamp(16px, 4vw, 18px);
    --font-size-lg: clamp(20px, 5vw, 24px);
    --font-size-xl: clamp(24px, 6vw, 28px);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    font-family: var(--font-main);
    color: var(--text-main);
    background-color: var(--bg-dark);
    overflow-x: hidden;
    -webkit-text-size-adjust: 100%;
    touch-action: manipulation;
    height: 100%;
}

/* Prevent zoom on iOS input focus */
input[type="text"] {
    font-size: 16px; /* Minimum to prevent zoom */
}

/* Viewport meta is handled in HTML head, but ensure full height */
.bg-gradient, .bg-dark {
    min-height: 100vh;
    background-attachment: fixed;
}

.bg-gradient {
    background: radial-gradient(circle at top, #1f2937 0%, #020617 55%);
}

/* App Shell - Desktop */
.app-shell {
    max-width: 1200px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-lg) var(--spacing-md);
}

/* Layout Root - Game Page */
.layout-root {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header - Fixed and Responsive */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    gap: var(--spacing-sm);
}

.fixed-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    padding: var(--spacing-xs) var(--spacing-sm);
    z-index: 100;
    background: linear-gradient(90deg, #020617ee, #020617f7);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(15, 23, 42, 0.8);
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.brand-logo {
    width: clamp(32px, 8vw, 40px);
    height: clamp(32px, 8vw, 40px);
    border-radius: 12px;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: clamp(14px, 4vw, 18px);
    color: white;
    flex-shrink: 0;
}

.brand-text {
    font-size: clamp(18px, 5vw, 22px);
    font-weight: 600;
    letter-spacing: 0.02em;
}

.status-bar {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    justify-content: flex-end;
    flex: 1;
    min-width: 0;
}

.chip {
    padding: clamp(6px, 1.5vw, 8px) clamp(10px, 2vw, 12px);
    border-radius: var(--radius-pill);
    background-color: var(--bg-soft);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    white-space: nowrap;
    flex-shrink: 0;
}

.chip-timer {
    background: linear-gradient(135deg, #fb923c, #ef4444);
    color: white;
    font-weight: 600;
    min-width: 70px;
    text-align: center;
}

/* Main Layout */
.layout-main {
    display: flex;
    max-width: 1400px;
    margin: var(--spacing-lg) auto 0;
    padding: 0 var(--spacing-md);
    gap: var(--spacing-md);
    min-height: calc(100vh - var(--header-height) - var(--footer-height));
}

/* Game Main Content */
.game-main {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.content-center {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg) 0;
}

/* Sidebar Leaderboard */
.sidebar-leaderboard {
    width: var(--sidebar-width);
    flex-shrink: 0;
    position: sticky;
    top: calc(var(--header-height) + var(--spacing-sm));
    align-self: flex-start;
    height: fit-content;
    max-height: 80vh;
}

/* Cards */
.card {
    background: linear-gradient(145deg, var(--bg-card), var(--bg-card-alt));
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    padding: var(--spacing-md);
    width: 100%;
    border: 1px solid rgba(148, 163, 184, 0.15);
    max-width: 100%;
    box-sizing: border-box;
}

.card-game {
    max-width: 800px;
}

.card-large {
    max-width: 700px;
}

.leaderboard-card {
    padding: var(--spacing-sm);
}

/* Typography */
h1 { font-size: var(--font-size-xl); margin: 0 0 var(--spacing-md); }
h2 { font-size: var(--font-size-lg); margin: 0 0 var(--spacing-sm); }
h3 { font-size: var(--font-size-base); margin: 0 0 var(--spacing-xs); }

.subtitle {
    margin: var(--spacing-xs) 0 var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    line-height: 1.4;
}

.small-subtitle {
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-xs);
}

/* Forms */
.name-form label {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
}

.input-row {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    align-items: end;
}

input[type="text"] {
    padding: clamp(12px, 3vw, 14px) clamp(14px, 3vw, 16px);
    border-radius: 12px;
    border: 1px solid var(--border-subtle);
    background-color: #020617;
    color: var(--text-main);
    flex: 1;
    min-width: 200px;
    font-size: var(--font-size-sm);
}

input[type="text"]::placeholder {
    color: #6b7280;
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.3);
}

/* Buttons - TOUCH FRIENDLY (min 44x44px) */
.btn-primary, .btn-secondary, .btn-ghost, .btn-secondary-small, .btn-share {
    padding: clamp(12px, 3vw, 16px) clamp(20px, 4vw, 24px);
    border-radius: var(--radius-pill);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px; /* iOS touch target minimum */
    touch-action: manipulation;
    border: none;
    transition: all 0.2s ease;
    white-space: nowrap;
    flex-shrink: 0;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: white;
}

.btn-primary:hover, .btn-primary:active {
    filter: brightness(1.1);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--bg-soft);
    color: var(--text-main);
    border: 1px solid var(--border-subtle);
}

.btn-secondary:hover, .btn-secondary:active {
    border-color: var(--accent);
    background-color: rgba(99, 102, 241, 0.1);
}

.btn-ghost {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-subtle);
}

.btn-ghost:hover, .btn-ghost:active {
    border-color: var(--accent);
    color: var(--text-main);
    background-color: rgba(99, 102, 241, 0.1);
}

.btn-secondary-small {
    padding: clamp(8px, 2vw, 10px) clamp(12px, 2.5vw, 14px);
    min-height: 36px;
    font-size: var(--font-size-xs);
}

/* Game Layout */
.question-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    align-items: center;
}

.tag {
    font-size: var(--font-size-xs);
    padding: clamp(4px, 1vw, 6px) clamp(8px, 1.5vw, 10px);
    border-radius: var(--radius-pill);
    background-color: var(--bg-soft);
    color: var(--text-muted);
}

.tag-soft {
    background-color: var(--accent-soft);
    color: #e5e7eb;
}

.question-text {
    font-size: var(--font-size-base);
    line-height: 1.5;
    margin-bottom: var(--spacing-md);
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.option-pill {
    border-radius: var(--radius-pill);
    border: 1px solid var(--border-subtle);
    background-color: #020617;
    color: var(--text-main);
    padding: clamp(14px, 3.5vw, 16px) clamp(16px, 3vw, 18px);
    font-size: var(--font-size-sm);
    text-align: left;
    cursor: pointer;
    transition: all 0.2s ease;
    min-height: 48px; /* Touch friendly */
    display: flex;
    align-items: center;
}

.option-pill:hover:not(:disabled) {
    border-color: var(--accent);
    transform: translateY(-1px);
}

.option-pill:active {
    transform: translateY(0);
}

.option-pill.selected {
    border-color: var(--accent);
    background: radial-gradient(circle at top, rgba(99, 102, 241, 0.35), #020617);
}

.option-pill.correct {
    border-color: var(--success);
    background-color: rgba(34, 197, 94, 0.15);
}

.option-pill.incorrect {
    border-color: var(--danger);
    background-color: rgba(248, 113, 113, 0.15);
}

.game-controls {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.game-controls button {
    flex: 1;
}

/* Result Screen */
.result-score, .result-iq {
    font-size: var(--font-size-base);
    margin: var(--spacing-sm) 0;
}

.result-score span, .result-iq span {
    font-weight: 600;
    color: var(--accent);
}

.result-message {
    margin: var(--spacing-sm) 0;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    line-height: 1.5;
}

.share-block {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px dashed rgba(148, 163, 184, 0.3);
}

.share-block h3 {
    font-size: var(--font-size-base);
}

.share-link-row {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    margin-top: var(--spacing-sm);
}

.share-link-row input[type="text"] {
    font-size: var(--font-size-xs);
    min-width: 0;
    flex: 1;
}

.result-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

/* Tables */
.table-wrapper, .sidebar-table-wrapper {
    margin-top: var(--spacing-sm);
    overflow-x: auto;
}

.sidebar-table-wrapper {
    max-height: clamp(300px, 40vh, 400px);
}

.modern-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-xs);
}

.modern-table th, .modern-table td {
    padding: clamp(6px, 1.5vw, 8px) clamp(8px, 2vw, 12px);
    text-align: left;
    border-bottom: 1px solid rgba(31, 41, 55, 0.8);
}

.modern-table th {
    font-weight: 500;
    color: var(--text-muted);
}

.modern-table tbody tr:hover {
    background-color: rgba(15, 23, 42, 0.6);
}

.compact-table th, .compact-table td {
    padding: clamp(4px, 1vw, 6px) clamp(6px, 1.5vw, 8px);
}

/* Footer */
.app-footer {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-align: center;
    padding: var(--spacing-sm);
}

.fixed-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--footer-height);
    display: flex;
    justify-content: center;
    align-items: center;
    background: #020617f3;
    border-top: 1px solid rgba(15, 23, 42, 0.8);
    z-index: 50;
}

/* Utilities */
.inline-actions {
    margin-top: var(--spacing-md);
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.text-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: var(--font-size-xs);
}

.text-link:hover {
    color: var(--text-main);
}

.hint {
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.hidden {
    display: none !important;
}

.empty-state {
    text-align: center;
    color: var(--text-muted);
    padding: var(--spacing-md);
}

/* MOBILE FIRST RESPONSIVE BREAKPOINTS */

/* Tablet Portrait (600px+) */
@media (min-width: 600px) {
    .options-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Tablet Landscape / Small Desktop (900px+) */
@media (min-width: 900px) {
    .layout-main {
        padding: 0 clamp(16px, 3vw, 24px);
    }
    
    .sidebar-leaderboard {
        display: block;
    }
}

/* Desktop (1024px+) */
@media (min-width: 1024px) {
    :root {
        --sidebar-width: 300px;
    }
    
    .app-shell {
        padding: clamp(24px, 4vw, 40px);
    }
    
    .layout-main {
        margin-top: var(--spacing-lg);
    }
}

/* Landscape Mobile Overrides */
@media (max-height: 500px) and (min-width: 500px) {
    .card {
        padding: var(--spacing-sm);
    }
    
    .sidebar-table-wrapper {
        max-height: 250px;
    }
    
    .question-text {
        font-size: var(--font-size-sm);
    }
}

/* High DPI / Retina displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .card {
        box-shadow: 0 25px 60px rgba(15, 23, 42, 0.7);
    }
}

/* iOS Safari specific fixes */
@supports (-webkit-touch-callout: none) {
    .option-pill {
        -webkit-tap-highlight-color: transparent;
    }
    
    input[type="text"] {
        -webkit-appearance: none;
    }
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}