/* ==========================================================================
   보건교사 임용고시 AI 맞춤형 플랫폼 - Light & Dark Dynamic Theme System
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;700;900&family=Outfit:wght@400;600;700;800&display=swap');

:root {
    /* Default Light Theme Variables */
    --bg-dark: #f8fafc;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --border-color: #e2e8f0;

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #5e6e85;

    --primary: #0284c7;
    --primary-hover: #0369a1;
    --primary-light: rgba(2, 132, 199, 0.1);

    --accent: #4f46e5;
    --accent-hover: #4338ca;
    --accent-glow: rgba(79, 70, 229, 0.15);

    --success: #059669;
    --success-bg: rgba(16, 185, 129, 0.1);

    --warning: #d97706;
    --warning-bg: rgba(245, 158, 11, 0.1);

    --danger: #dc2626;
    --danger-bg: rgba(239, 68, 68, 0.1);

    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(226, 232, 240, 0.8);

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 10px 25px rgba(15, 23, 42, 0.12);
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme Variables */
[data-theme="dark"] {
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --border-color: #334155;

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #a0aec0;

    --primary: #0ea5e9;
    --primary-hover: #0284c7;
    --primary-light: rgba(14, 165, 233, 0.15);

    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --accent-glow: rgba(99, 102, 241, 0.3);

    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.12);

    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.12);

    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.12);

    --glass-bg: rgba(30, 41, 59, 0.85);
    --glass-border: rgba(255, 255, 255, 0.08);

    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: 'Noto Sans KR', 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, #0284c7 0%, #4f46e5 50%, #9333ea 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

[data-theme="dark"] .gradient-text {
    background: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #c084fc 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
    width: 100%;
}

.navbar {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 0.85rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
}

.brand-icon {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    box-shadow: 0 2px 10px var(--accent-glow);
    font-size: 1.2rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.5rem 0.85rem;
    border-radius: 8px;
    transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
    color: var(--primary);
    background: var(--primary-light);
}

.btn-nav {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff !important;
    font-weight: 600;
    border-radius: 8px;
    box-shadow: 0 4px 12px var(--accent-glow);
}

.btn-nav:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

/* Theme Toggle Button */
.theme-toggle-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.45rem 0.85rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: var(--transition);

    box-shadow: var(--shadow-sm);
}

.theme-toggle-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    color: var(--primary);
}

.main-content {
    flex: 1;
    padding: 2.5rem 0;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.75rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.card:hover {
    border-color: var(--primary);
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
}

.hero-section {
    position: relative;
    padding: 3rem 2.25rem;
    background: linear-gradient(135deg, rgba(2, 132, 199, 0.08), rgba(79, 70, 229, 0.08));
    border-radius: 24px;
    border: 1px solid var(--border-color);
    margin-bottom: 2.5rem;
    overflow: hidden;
}

[data-theme="dark"] .hero-section {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.15), rgba(99, 102, 241, 0.15));
}

.hero-title {
    font-size: 2.3rem;
    line-height: 1.25;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 680px;
    margin-bottom: 2rem;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.25rem;
    margin-top: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 1.25rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.stat-value {
    font-size: 1.85rem;
    font-weight: 800;
    color: var(--primary);
    font-family: 'Outfit', sans-serif;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.section-title {
    font-size: 1.4rem;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.section-title::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 1.4rem;
    background: linear-gradient(180deg, var(--primary), var(--accent));
    border-radius: 4px;
}

.domain-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.domain-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
}

.domain-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.domain-badge {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    width: fit-content;
    margin-bottom: 0.75rem;
}

.domain-title {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
}

.domain-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: #fff;
    box-shadow: 0 4px 14px rgba(2, 132, 199, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(2, 132, 199, 0.45);
}

.btn-accent {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: #fff;
    box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

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

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

.btn-lg {
    padding: 0.85rem 1.75rem;
    font-size: 1rem;
}

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

.form-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-control, .form-select, textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition);
}

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

textarea {
    resize: vertical;
    min-height: 140px;
    line-height: 1.6;
}

.exam-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

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

.exam-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.rubric-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
}

.rubric-item {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.25rem;
}

.rubric-item.matched {
    border-left: 4px solid var(--success);
    background: var(--success-bg);
}

.rubric-item.unmatched {
    border-left: 4px solid var(--danger);
    background: var(--danger-bg);
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
}

.badge-success {
    background: var(--success-bg);
    color: var(--success);
}

.badge-danger {
    background: var(--danger-bg);
    color: var(--danger);
}

.badge-warning {
    background: var(--warning-bg);
    color: var(--warning);
}

.rag-box {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1rem;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 0.85rem;
    color: var(--text-primary);
    max-height: 250px;
    overflow-y: auto;
    white-space: pre-wrap;
}

.score-hero-box {
    text-align: center;
    padding: 2.5rem;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.08), rgba(2, 132, 199, 0.08));
    border-radius: 20px;
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

[data-theme="dark"] .score-hero-box {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(14, 165, 233, 0.15));
}

.score-display {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--primary);
    font-family: 'Outfit', sans-serif;
    line-height: 1;
    margin: 1rem 0;
}

.score-max {
    font-size: 1.5rem;
    color: var(--text-muted);
}

.spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.75);
    backdrop-filter: blur(8px);
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(2, 132, 199, 0.2);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: auto;
    color: var(--text-muted);
    font-size: 0.85rem;
    text-align: center;
}

/* ==========================================================================
   iPhone 15 & iPad Air 4 Responsive Optimization (Mobile & Tablet Specs)
   ========================================================================== */

/* 1. iPad Air 4 / Tablet Optimization (Width <= 1024px) */
@media (max-width: 1024px) {
    .container {
        padding: 0 1.25rem;
    }

    .hero-title {
        font-size: 1.85rem !important;
    }

    .exam-layout {
        grid-template-columns: 1fr !important;
        gap: 1.25rem !important;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 1rem !important;
    }

    .card {
        padding: 1.25rem !important;
    }

    .score-display {
        font-size: 2.8rem !important;
    }
}

/* 2. iPhone 15 & Mobile Devices Optimization (Width <= 640px) */
@media (max-width: 640px) {
    body {
        font-size: 15px;
    }

    .container {
        padding: 0 0.85rem;
    }

    .navbar {
        padding: 0.65rem 0;
    }

    .nav-container {
        flex-direction: column;
        gap: 0.75rem;
        align-items: stretch;
    }

    .brand-logo {
        justify-content: center;
        font-size: 1.1rem;
    }

    .nav-links {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.4rem;
        width: 100%;
    }

    .nav-link, .btn-nav {
        padding: 0.4rem 0.65rem;
        font-size: 0.8rem;
        min-height: 40px;
        display: inline-flex;
        align-items: center;
    }

    .hero-section {
        padding: 1.25rem 1rem !important;
        margin-bottom: 1.25rem !important;
    }

    .hero-title {
        font-size: 1.45rem !important;
        text-align: center;
    }

    .hero-subtitle {
        font-size: 0.88rem !important;
        text-align: center;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 0.65rem !important;
    }

    .stat-card {
        padding: 0.85rem !important;
        text-align: center;
    }

    .stat-value {
        font-size: 1.4rem !important;
    }

    .stat-label {
        font-size: 0.75rem !important;
    }

    /* Option selector grid on exam.html */
    div[style*="grid-template-columns"] {
        grid-template-columns: 1fr !important;
        gap: 0.85rem !important;
    }

    /* Form controls - Prevent Safari auto-zoom by setting font-size >= 16px */
    .form-control, .form-select, textarea {
        font-size: 16px !important;
        min-height: 46px;
        padding: 0.65rem 0.85rem !important;
    }

    textarea {
        min-height: 140px;
    }

    .btn, .btn-lg {
        padding: 0.75rem 1rem !important;
        font-size: 0.95rem !important;
        min-height: 48px; /* Touch target min height */
        display: flex;
        align-items: center;
        justify-content: center;
        width: 100% !important;
    }

    /* Buttons flex container in hero */
    div[style*="display: flex; gap: 1rem;"] {
        flex-direction: column !important;
        width: 100% !important;
        gap: 0.65rem !important;
    }

    .footer {
        padding: 1.25rem 0;
        font-size: 0.78rem;
        padding-bottom: calc(1.25rem + env(safe-area-inset-bottom));
    }
}