/* =================================================================
   Quick IQ Test - Glassmorphism 2.0 Design
   Color Scheme: Intelligent Blue (#3498db) + Dark Mode
   ================================================================= */

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary, #3498db);
    color: #fff;
    padding: 8px 16px;
    z-index: 10000;
    transition: top 0.2s;
    font-size: 14px;
    border-radius: 0 0 4px 0;
}
.skip-link:focus {
    top: 0;
}

/* Root Variables */
:root {
    --primary: #3498db;
    --primary-dark: #2980b9;
    --primary-light: #5dade2;
    --secondary: #2c3e50;
    --tertiary: #e74c3c;
    --success: #27ae60;
    --warning: #f39c12;
    --danger: #e74c3c;

    /* Dark Mode Colors */
    --bg-dark: #0f0f23;
    --bg-card: #1a1a3a;
    --bg-input: #262649;
    --text-primary: #ffffff;
    --text-secondary: #b8c5d6;
    --border-color: rgba(255, 255, 255, 0.1);
    --border-color-light: rgba(255, 255, 255, 0.15);

    /* Category Colors */
    --cat-pattern: #ff6b6b;
    --cat-sequence: #4ecdc4;
    --cat-logic: #ffe66d;
    --cat-spatial: #95e1d3;
    --cat-language: #c7b3e5;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    --font-size-base: 1rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;

    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* App Loader */
.app-loader {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--bg-dark, #0f0f23);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.3s;
}
.app-loader.hidden {
    opacity: 0;
    pointer-events: none;
}
.loader-spinner {
    width: 40px; height: 40px;
    border: 3px solid rgba(255,255,255,0.1);
    border-top-color: var(--primary, #3498db);
    border-radius: 50%;
    animation: loader-spin 0.8s linear infinite;
}
@keyframes loader-spin { to { transform: rotate(360deg); } }

/* =================================================================
   Global Styles
   ================================================================= */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1a1a3a 100%);
    color: var(--text-primary);
    background-attachment: fixed;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Selection Color */
::selection {
    background: var(--primary);
    color: white;
}

::-moz-selection {
    background: var(--primary);
    color: white;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* =================================================================
   Ad Banners
   ================================================================= */

.ad-banner {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    min-height: 100px;
}

.ad-banner ins {
    display: block;
}

/* =================================================================
   Container & Layout
   ================================================================= */

.container {
    flex: 1;
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
    padding: var(--spacing-md);
}

/* =================================================================
   Header
   ================================================================= */

.header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.header-content h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.app-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

/* Language Selector */
.header-controls {
    position: relative;
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.theme-toggle {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    padding: 0;
}

.theme-toggle:hover {
    background: var(--bg-input);
    border-color: var(--primary);
    transform: scale(1.05);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.lang-toggle {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    padding: 0;
}

.lang-toggle:hover {
    background: var(--bg-input);
    border-color: var(--primary);
    transform: scale(1.05);
}

.lang-toggle:active {
    transform: scale(0.95);
}

.lang-menu {
    position: absolute;
    top: 50px;
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm);
    min-width: 150px;
    max-height: 300px;
    overflow-y: auto;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

.lang-menu.hidden {
    display: none;
}

.lang-option {
    display: block;
    width: 100%;
    padding: var(--spacing-sm);
    text-align: left;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: var(--font-size-base);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.lang-option:hover {
    background: var(--bg-input);
    color: var(--primary);
}

.lang-option.active {
    background: var(--primary);
    color: white;
}

/* =================================================================
   Screens
   ================================================================= */

.screen {
    display: none;
    animation: fadeIn 0.5s ease-in;
}

.screen.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* =================================================================
   Start Screen
   ================================================================= */

.start-content {
    text-align: center;
    padding: var(--spacing-xl);
}

.start-icon {
    font-size: 5rem;
    margin-bottom: var(--spacing-lg);
    display: inline-block;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.start-content h2 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.start-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.info-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    text-align: center;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.info-card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(52, 152, 219, 0.15);
}

.info-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.info-card p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.disclaimer {
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid rgba(231, 76, 60, 0.3);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* =================================================================
   Test Screen
   ================================================================= */

.test-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.progress-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

.progress-text::after {
    content: attr(data-i18n);
}

.timer-box {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--bg-card);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.timer {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary);
    min-width: 40px;
    text-align: center;
    transition: color 0.1s;
}

.timer.warning {
    color: var(--warning);
}

.timer.critical {
    color: var(--danger);
    animation: pulse 0.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.progress-bar {
    height: 6px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--border-color);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
    width: 5%;
    transition: width 0.3s ease;
}

/* Question Container */
.question-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    backdrop-filter: blur(10px);
}

.question-type {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.type-icon {
    font-size: 1.5rem;
}

.question-text {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.question-content {
    min-height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Options Container */
.options-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.option {
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.option::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s;
}

.option:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(52, 152, 219, 0.15);
}

.option.selected {
    border-color: var(--primary);
    background: rgba(52, 152, 219, 0.1);
    color: var(--primary);
}

.option.correct {
    border-color: var(--success);
    background: rgba(39, 174, 96, 0.1);
    color: var(--success);
}

.option.incorrect {
    border-color: var(--danger);
    background: rgba(231, 76, 60, 0.1);
    color: var(--danger);
}

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

/* Test Navigation */
.test-navigation {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

/* =================================================================
   Results Screen
   ================================================================= */

.results-content {
    padding: var(--spacing-lg) 0;
}

.score-display {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.score-ring {
    position: relative;
    width: 250px;
    height: 250px;
    margin: 0 auto var(--spacing-lg);
}

.gauge-chart {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.gauge-background {
    fill: none;
    stroke: var(--bg-card);
    stroke-width: 8;
}

.gauge-progress {
    fill: none;
    stroke: url(#gauge-gradient);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 565;
    stroke-dashoffset: 565;
    transition: stroke-dashoffset 1s ease;
}

.score-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.score-value {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary);
}

.score-label {
    display: block;
    font-size: var(--font-size-md);
    color: var(--text-secondary);
}

.grade-info {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.grade-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-sm);
    color: var(--primary);
}

.grade-desc {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

/* Category Analysis */
.category-analysis {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.category-analysis h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.radar-container {
    position: relative;
    margin-bottom: var(--spacing-md);
}

.radar-chart {
    width: 100%;
    max-width: 300px;
    margin: 0 auto var(--spacing-md);
}

.radar-legend {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: var(--spacing-sm);
    text-align: center;
}

.legend-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 2px;
}

/* Score Breakdown */
.score-breakdown {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.score-breakdown h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

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

.score-bar {
    display: grid;
    grid-template-columns: 100px 1fr 50px;
    gap: var(--spacing-md);
    align-items: center;
}

.score-bar-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 500;
}

.score-bar-track {
    height: 8px;
    background: var(--bg-input);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.score-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #ff6b6b, #4ecdc4, #ffe66d, #95e1d3, #c7b3e5);
    width: 0;
    border-radius: 4px;
    transition: width 1s ease;
}

.score-bar-value {
    font-size: var(--font-size-sm);
    color: var(--primary);
    font-weight: 600;
    text-align: right;
}

/* Premium Section */
.premium-section {
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.1) 0%, rgba(189, 224, 254, 0.05) 100%);
    border: 1px solid rgba(52, 152, 219, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.premium-hint {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-top: var(--spacing-sm);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    animation: fadeIn 0.3s ease;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-content h3 {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.ai-analysis-text {
    color: var(--text-secondary);
    line-height: 1.8;
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* Sharing Section */
.sharing-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

/* =================================================================
   Buttons
   ================================================================= */

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    width: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(52, 152, 219, 0.4);
}

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

/* CTA pulse for start button */
@keyframes ctaPulse {
    0%, 100% { box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3); }
    50% { box-shadow: 0 4px 30px rgba(52, 152, 219, 0.6), 0 0 60px rgba(52, 152, 219, 0.2); }
}
#btn-start {
    animation: ctaPulse 2s ease-in-out infinite;
    font-size: 1.1rem;
}
@media (prefers-reduced-motion: reduce) {
    #btn-start { animation: none !important; }
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    flex: 1;
}

.btn-secondary:hover {
    border-color: var(--primary);
    background: var(--bg-input);
}

.btn-secondary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-premium {
    background: linear-gradient(135deg, #ffd700 0%, #ffed4e 100%);
    color: #333;
    width: 100%;
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.btn-premium:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 215, 0, 0.4);
}

/* =================================================================
   Utilities
   ================================================================= */

.hidden {
    display: none !important;
}

.loading-spinner {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3000;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--bg-card);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* =================================================================
   Responsive Design
   ================================================================= */

@media (max-width: 768px) {
    :root {
        --font-size-3xl: 2rem;
        --font-size-2xl: 1.5rem;
        --font-size-xl: 1.25rem;
        --spacing-xl: 2rem;
    }

    .container {
        padding: var(--spacing-md);
    }

    .header {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: center;
    }

    .header-content {
        text-align: center;
    }

    .header-content h1 {
        font-size: var(--font-size-2xl);
    }

    .info-cards {
        grid-template-columns: 1fr;
    }

    .test-header {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: flex-start;
    }

    .options-container {
        grid-template-columns: 1fr;
    }

    .test-navigation {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .test-navigation .btn {
        width: 100%;
    }

    .score-ring {
        width: 180px;
        height: 180px;
    }

    .score-value {
        font-size: 2rem;
    }

    .score-bar {
        grid-template-columns: 80px 1fr 40px;
    }

    .sharing-section {
        grid-template-columns: 1fr;
    }

    .sharing-section .btn {
        width: 100%;
    }

    .modal-content {
        width: 95%;
        border-radius: var(--radius-lg);
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-3xl: 1.75rem;
        --font-size-2xl: 1.25rem;
        --font-size-xl: 1rem;
        --spacing-xl: 1.5rem;
        --spacing-lg: 1rem;
    }

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

    .start-icon {
        font-size: 3rem;
    }

    .start-content h2 {
        font-size: var(--font-size-2xl);
    }

    .question-container {
        padding: var(--spacing-md);
    }

    .question-text {
        font-size: var(--font-size-lg);
    }

    .score-ring {
        width: 150px;
        height: 150px;
    }

    .score-value {
        font-size: 1.75rem;
    }

    .options-container {
        gap: var(--spacing-sm);
    }

    .option {
        padding: var(--spacing-sm);
        font-size: var(--font-size-sm);
    }

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

    .info-icon {
        font-size: 1.5rem;
    }

    .radar-chart {
        max-width: 250px;
    }

    .score-bar {
        grid-template-columns: 70px 1fr 35px;
        gap: var(--spacing-sm);
    }

    .score-bar-label {
        font-size: 0.75rem;
    }

    .radar-legend {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
    }
}

/* =================================================================
   Light Mode (Optional - can be added via JS toggle)
   ================================================================= */

body.light-mode {
    --bg-dark: #ffffff;
    --bg-card: #f5f5f5;
    --bg-input: #ececec;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --border-color: rgba(0, 0, 0, 0.1);
    --border-color-light: rgba(0, 0, 0, 0.05);
    background: linear-gradient(135deg, #ffffff 0%, #f0f0f0 100%);
}

/* Light mode override via data-theme */
[data-theme="light"] {
    --bg-dark: #f5f5fa;
    --bg-card: #ffffff;
    --bg-input: #f0f0f5;
    --text-primary: #1a1a2e;
    --text-secondary: #5a5a70;
    --border-color: rgba(0, 0, 0, 0.1);
    --border-color-light: rgba(0, 0, 0, 0.05);
}

[data-theme="light"] body {
    background: linear-gradient(135deg, #f5f5fa 0%, #ffffff 100%);
    color: var(--text-primary);
}

[data-theme="light"] .theme-toggle {
    background: rgba(52, 152, 219, 0.1);
    border-color: rgba(52, 152, 219, 0.2);
}

[data-theme="light"] .theme-toggle:hover {
    background: rgba(52, 152, 219, 0.2);
}

/* =================================================================
   Accessibility
   ================================================================= */

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

/* Focus Visible for Keyboard Navigation */
.btn:focus-visible,
.option:focus-visible,
.lang-option:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: more) {
    .btn-primary {
        border: 2px solid white;
    }

    .option {
        border-width: 3px;
    }
}

/* Color Scheme Preference */
@media (prefers-color-scheme: light) {
    body {
        background: linear-gradient(135deg, #ffffff 0%, #f0f0f0 100%);
        color: #1a1a1a;
    }
}