/* index.css - Modern Design System for CBT Web App */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&family=Noto+Sans+KR:wght@300;400;500;700&display=swap');

:root {
    /* Fonts */
    --font-primary: 'Outfit', 'Noto Sans KR', sans-serif;

    /* Color Tokens - Default Dark Mode */
    --bg-base: #0f172a;
    --bg-surface: #1e293b;
    --bg-surface-hover: #334155;
    --border-color: #475569;
    --border-focus: #6366f1;
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --primary: #6366f1; /* Indigo */
    --primary-hover: #4f46e5;
    --primary-glow: rgba(99, 102, 241, 0.15);
    
    --success: #10b981; /* Emerald */
    --success-bg: rgba(16, 185, 129, 0.1);
    --danger: #ef4444; /* Rose */
    --danger-bg: rgba(239, 68, 68, 0.1);
    --warning: #f59e0b; /* Amber */
    --warning-bg: rgba(245, 158, 11, 0.1);

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
}

/* Light Theme Variables */
[data-theme="light"] {
    --bg-base: #f8fafc;
    --bg-surface: #ffffff;
    --bg-surface-hover: #f1f5f9;
    --border-color: #e2e8f0;
    --border-focus: #4f46e5;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --primary: #4f46e5;
    --primary-hover: #3730a3;
    --primary-glow: rgba(79, 70, 229, 0.1);
    
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
}

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

body {
    font-family: var(--font-primary);
    background-color: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Layout */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.logo {
    font-weight: 700;
    font-size: 1.5rem;
    background: linear-gradient(to right, #6366f1, #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Icons styling */
.icon-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    color: var(--text-primary);
    background-color: var(--bg-surface-hover);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: var(--font-primary);
    font-size: 0.95rem;
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-primary {
    background-color: var(--primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--primary-glow);
}

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

.btn-secondary:hover {
    background-color: var(--bg-surface-hover);
}

.btn-danger {
    background-color: var(--danger);
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
    transform: translateY(-1px);
}

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

/* Cards */
.card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
}

/* Setup Screen */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 2rem;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

.setup-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.setup-card {
    cursor: pointer;
}

.setup-card:hover {
    border-color: var(--border-focus);
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-control {
    width: 100%;
    font-family: var(--font-primary);
    background-color: var(--bg-base);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

/* Game/Exam Layout */
.exam-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 2rem;
    margin-top: 1rem;
}

@media (max-width: 992px) {
    .exam-layout {
        grid-template-columns: 1fr;
    }
}

.question-area {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.exam-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1rem 1.5rem;
}

.exam-info {
    display: flex;
    flex-direction: column;
}

.exam-timer {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--warning);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.exam-timer.urgent {
    color: var(--danger);
    animation: pulse 1s infinite;
}

/* Question Card */
.question-card {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.question-number {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
}

.question-text {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text-primary);
}

.question-passage {
    background-color: var(--bg-base);
    border-left: 4px solid var(--primary);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    font-size: 0.95rem;
    font-family: inherit;
    white-space: pre-wrap;
    color: var(--text-secondary);
}

.choices-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.choice-option {
    display: flex;
    align-items: center;
    gap: 1rem;
    background-color: var(--bg-base);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1rem 1.25rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.choice-option:hover {
    background-color: var(--bg-surface-hover);
    border-color: var(--text-muted);
}

.choice-option.selected {
    border-color: var(--primary);
    background-color: var(--primary-glow);
}

.choice-num {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.choice-option.selected .choice-num {
    background-color: var(--primary);
    border-color: var(--primary);
    color: white;
}

.choice-text {
    font-size: 1rem;
    color: var(--text-primary);
}

/* Feedback in Learning Mode / Post Grading */
.choice-option.correct {
    border-color: var(--success);
    background-color: var(--success-bg);
}
.choice-option.correct .choice-num {
    background-color: var(--success);
    border-color: var(--success);
    color: white;
}

.choice-option.incorrect {
    border-color: var(--danger);
    background-color: var(--danger-bg);
}
.choice-option.incorrect .choice-num {
    background-color: var(--danger);
    border-color: var(--danger);
    color: white;
}

.explanation-box {
    background-color: var(--success-bg);
    border: 1px solid var(--success);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.explanation-title {
    font-weight: 600;
    color: var(--success);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.explanation-text {
    font-size: 0.95rem;
    color: var(--text-primary);
}

/* OMR Card Panel */
.omr-panel {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    height: fit-content;
    position: sticky;
    top: 5.5rem;
}

.omr-grid-container {
    max-height: 400px;
    overflow-y: auto;
    padding-right: 0.25rem;
}

.omr-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0.5rem;
}

.omr-item {
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    background-color: var(--bg-base);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.omr-item:hover {
    border-color: var(--text-muted);
    background-color: var(--bg-surface-hover);
}

.omr-item.active {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary);
}

.omr-item.answered {
    background-color: var(--primary);
    border-color: var(--primary);
    color: white;
}

.omr-item.correct {
    background-color: var(--success);
    border-color: var(--success);
    color: white;
}

.omr-item.incorrect {
    background-color: var(--danger);
    border-color: var(--danger);
    color: white;
}

/* Navigation Buttons */
.nav-buttons {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Modal styling */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.modal-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 550px;
    padding: 2.5rem;
    box-shadow: var(--shadow-xl);
    transform: scale(0.9);
    transition: transform var(--transition-normal);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.modal-overlay.open .modal-content {
    transform: scale(1);
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
}

.result-badge {
    align-self: center;
    font-size: 1.25rem;
    font-weight: 700;
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    text-transform: uppercase;
}

.result-badge.pass {
    background-color: var(--success-bg);
    color: var(--success);
    border: 1px solid var(--success);
}

.result-badge.fail {
    background-color: var(--danger-bg);
    color: var(--danger);
    border: 1px solid var(--danger);
}

.result-stats {
    background-color: var(--bg-base);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.result-stat-row {
    display: flex;
    justify-content: space-between;
    font-size: 1rem;
}

.result-stat-row.total {
    border-top: 1px solid var(--border-color);
    padding-top: 0.75rem;
    font-weight: 700;
}

/* Animations */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* Utility classes */
.hidden {
    display: none !important;
}

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

.d-flex {
    display: flex;
}

.gap-2 {
    gap: 0.5rem;
}

.w-full {
    width: 100%;
}