/* =============================================
   OSINT Training Portal - Main Stylesheet
   ============================================= */

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

:root {
    --primary-color: #00d4ff;
    --primary-dark: #0099cc;
    --secondary-color: #7c3aed;
    --accent-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --success-color: #10b981;
    --dark-bg: #0a0f1e;
    --dark-card: #111827;
    --dark-hover: #1f2937;
    --dark-border: #1e293b;
    --text-primary: #f0f4f8;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #1e3a5f;
    --gradient-1: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
    --gradient-2: linear-gradient(135deg, #0a0f1e 0%, #0d1f3c 100%);
    --gradient-hero: linear-gradient(135deg, #0a0f1e 0%, #0d1f3c 50%, #0a1628 100%);
    --shadow-sm: 0 1px 2px 0 rgba(0, 212, 255, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 212, 255, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 212, 255, 0.15);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
    --glow: 0 0 20px rgba(0, 212, 255, 0.3);
    --glow-purple: 0 0 20px rgba(124, 58, 237, 0.3);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* =============================================
   NAVBAR
   ============================================= */
.navbar {
    background: rgba(10, 15, 30, 0.97);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 212, 255, 0.15);
    padding: 0.9rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

/* ── DSTA brand theme (네이비 + 레드) — applies to dsta-* pages ── */
.dsta-theme .navbar {
    background: linear-gradient(135deg, #0d2240 0%, #1a3a6e 100%);
    border-bottom: 3px solid #c8272d;
}
.dsta-theme .nav-brand .brand-sub {
    color: rgba(255,255,255,0.7) !important;
}
/* DSTA primary btn (Register Now 등) */
.dsta-theme .btn-primary {
    background: linear-gradient(135deg, #c8272d, #9e1f23) !important;
    color: #fff !important;
}
.dsta-theme .btn-primary:hover {
    background: linear-gradient(135deg, #9e1f23, #c8272d) !important;
    box-shadow: 0 0 20px rgba(200,39,45,0.45) !important;
    opacity: 1 !important;
}
/* DSTA Sign Out — 눈에 잘 띄는 아웃라인 버튼 */
.dsta-theme .btn-outline {
    background: transparent;
    color: #fff !important;
    border: 1px solid rgba(255,255,255,0.55);
}
.dsta-theme .btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.9);
    box-shadow: none;
}
/* DSTA Home/secondary 버튼 */
.dsta-theme .btn-secondary {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.2);
    color: #fff !important;
}
.dsta-theme .btn-secondary:hover {
    background: rgba(255,255,255,0.18);
    border-color: rgba(255,255,255,0.45);
}
/* DSTA user-info 칩 */
.dsta-theme .user-info {
    background: rgba(255,255,255,0.08);
    border-color: rgba(255,255,255,0.15);
    color: #fff;
}
.dsta-theme .user-info i {
    color: rgba(255,255,255,0.75);
}
/* DSTA nav-brand 텍스트 흰색 */
.dsta-theme .nav-brand {
    color: #fff;
}
.dsta-theme .nav-links a {
    color: rgba(255,255,255,0.85) !important;
}
.dsta-theme .nav-links a:hover {
    color: #fff !important;
}

/* ── Thai MOD brand theme (네이비 + 골드) — applies to thaimod-* pages ── */
.thaimod-theme .navbar {
    background: linear-gradient(135deg, #0a1f35 0%, #1b4d7e 100%);
    border-bottom: 3px solid #c9a74b;
}
.thaimod-theme .nav-brand {
    color: #fff;
}
.thaimod-theme .nav-brand .brand-sub {
    color: rgba(255,255,255,0.7) !important;
}
/* Thai MOD primary btn (Register 등) */
.thaimod-theme .btn-primary {
    background: linear-gradient(135deg, #1b4d7e, #0a1f35) !important;
    color: #fff !important;
}
.thaimod-theme .btn-primary:hover {
    background: linear-gradient(135deg, #0a1f35, #1b4d7e) !important;
    opacity: 0.9 !important;
}
/* Thai MOD Sign Out — 눈에 잘 띄는 아웃라인 버튼 */
.thaimod-theme .btn-outline {
    background: transparent;
    color: #fff !important;
    border: 1px solid rgba(255,255,255,0.55);
}
.thaimod-theme .btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.9);
    box-shadow: none;
}
/* Thai MOD Home/secondary 버튼 */
.thaimod-theme .btn-secondary {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.2);
    color: #fff !important;
}
.thaimod-theme .btn-secondary:hover {
    background: rgba(255,255,255,0.18);
    border-color: rgba(255,255,255,0.45);
}
/* Thai MOD user-info 칩 */
.thaimod-theme .user-info {
    background: rgba(255,255,255,0.08);
    border-color: rgba(255,255,255,0.15);
    color: #fff;
}
.thaimod-theme .user-info i {
    color: rgba(255,255,255,0.75);
}
/* Thai MOD nav-links 링크 색상 */
.thaimod-theme .nav-links a:not(.btn-primary):not(.btn-outline):not(.btn-secondary) {
    color: rgba(255,255,255,0.85) !important;
}
.thaimod-theme .nav-links a:not(.btn-primary):not(.btn-outline):not(.btn-secondary):hover {
    color: #fff !important;
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: 0.05em;
}

.nav-brand i {
    color: var(--primary-color);
    font-size: 1.4rem;
    filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.6));
}

.nav-brand .brand-sub {
    font-size: 0.65rem;
    color: var(--primary-color);
    font-weight: 500;
    letter-spacing: 0.15em;
    display: block;
    line-height: 1;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
    font-weight: 500;
    font-size: 0.9rem;
}

.nav-links a:hover {
    color: var(--primary-color);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    background: var(--dark-card);
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.875rem;
    border: 1px solid var(--border-color);
}

.user-info i {
    color: var(--primary-color);
}

/* =============================================
   BUTTONS
   ============================================= */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: #0a0f1e !important;
    padding: 0.5rem 1.25rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
    font-size: 0.875rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary:hover {
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color) !important;
    padding: 0.5rem 1.25rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.875rem;
    border: 1px solid var(--primary-color);
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-outline:hover {
    background: rgba(0, 212, 255, 0.1);
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.2);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary) !important;
    padding: 0.5rem 1.25rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.875rem;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--primary-color);
}

.btn-large {
    padding: 0.85rem 2rem;
    font-size: 1rem;
    border-radius: 10px;
}

/* 아이콘 전용 소형 버튼 (수강생 관리 Edit / Reset PW) */
.btn-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.82rem;
    transition: all 0.2s;
    margin-left: 0.25rem;
}
.btn-icon:first-child { margin-left: 0; }

.btn-icon-edit {
    background: rgba(0, 212, 255, 0.12);
    color: var(--primary-color) !important;
    border: 1px solid rgba(0, 212, 255, 0.3);
}
.btn-icon-edit:hover {
    background: rgba(0, 212, 255, 0.25);
    border-color: var(--primary-color);
    box-shadow: 0 0 8px rgba(0, 212, 255, 0.3);
    transform: translateY(-1px);
}

.btn-icon-key {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-secondary) !important;
    border: 1px solid var(--dark-border);
}
.btn-icon-key:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--text-secondary);
    transform: translateY(-1px);
}

.btn-icon-delete {
    background: rgba(255, 59, 59, 0.08);
    color: var(--danger-color) !important;
    border: 1px solid rgba(255, 59, 59, 0.25);
}
.btn-icon-delete:hover {
    background: rgba(255, 59, 59, 0.2);
    border-color: var(--danger-color);
    box-shadow: 0 0 8px rgba(255, 59, 59, 0.3);
    transform: translateY(-1px);
}

.btn-danger {
    background: var(--danger-color);
    color: white !important;
    padding: 0.4rem 1rem;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-success {
    background: var(--success-color);
    color: white !important;
    padding: 0.4rem 1rem;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-warning {
    background: var(--warning-color);
    color: #0a0f1e !important;
    padding: 0.4rem 1rem;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
    transition: all 0.3s;
}

/* =============================================
   HERO SECTION
   ============================================= */
.hero {
    position: relative;
    padding: 6rem 0 5rem;
    overflow: hidden;
    background: var(--gradient-hero);
    min-height: 85vh;
    display: flex;
    align-items: center;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(0, 212, 255, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(124, 58, 237, 0.08) 0%, transparent 60%);
    pointer-events: none;
}

.hero-background {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    color: var(--primary-color);
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 1.25rem;
    background: linear-gradient(135deg, #ffffff 0%, var(--primary-color) 50%, #7c3aed 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 650px;
    margin: 0 auto 2rem;
    line-height: 1.7;
}

.hero-meta {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.hero-meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.hero-meta-item i {
    color: var(--primary-color);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.85rem;
    margin-bottom: 2.5rem;
    width: 100%;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

/* ── hero stat card base (scoped to .hero-stats to avoid dashboard conflict) ── */
.hero-stats .stat-card {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1rem;
    border-radius: 14px;
    border: 1px solid transparent;
    background: rgba(255,255,255,0.04);
    backdrop-filter: blur(12px);
    transition: transform 0.22s ease, box-shadow 0.22s ease;
    cursor: default;
    box-sizing: border-box;
    width: 100%;
    min-width: 0; /* grid item overflow 방지 */
}

.hero-stats .stat-card:hover {
    transform: translateY(-4px);
}

.hero-stats .stat-card-icon {
    width: 46px;
    height: 46px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.hero-stats .stat-card-body {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    min-width: 0; /* text overflow 방지 */
}

/* ── cyan (3 Days) ── */
.hero-stats .stat-card--cyan {
    border-color: rgba(0, 212, 255, 0.25);
    box-shadow: 0 0 18px rgba(0, 212, 255, 0.12), inset 0 0 20px rgba(0, 212, 255, 0.04);
}
.hero-stats .stat-card--cyan:hover {
    box-shadow: 0 8px 28px rgba(0, 212, 255, 0.28), inset 0 0 24px rgba(0, 212, 255, 0.08);
}
.hero-stats .stat-card--cyan .stat-card-icon {
    background: rgba(0, 212, 255, 0.15);
    color: #00d4ff;
    box-shadow: 0 0 12px rgba(0, 212, 255, 0.35);
}
.hero-stats .stat-card--cyan .stat-number { color: #00d4ff; }

/* ── purple (21회차) ── */
.hero-stats .stat-card--purple {
    border-color: rgba(124, 58, 237, 0.3);
    box-shadow: 0 0 18px rgba(124, 58, 237, 0.12), inset 0 0 20px rgba(124, 58, 237, 0.04);
}
.hero-stats .stat-card--purple:hover {
    box-shadow: 0 8px 28px rgba(124, 58, 237, 0.28), inset 0 0 24px rgba(124, 58, 237, 0.08);
}
.hero-stats .stat-card--purple .stat-card-icon {
    background: rgba(124, 58, 237, 0.18);
    color: #a78bfa;
    box-shadow: 0 0 12px rgba(124, 58, 237, 0.4);
}
.hero-stats .stat-card--purple .stat-number { color: #a78bfa; }

/* ── green (AI) ── */
.hero-stats .stat-card--green {
    border-color: rgba(16, 185, 129, 0.28);
    box-shadow: 0 0 18px rgba(16, 185, 129, 0.12), inset 0 0 20px rgba(16, 185, 129, 0.04);
}
.hero-stats .stat-card--green:hover {
    box-shadow: 0 8px 28px rgba(16, 185, 129, 0.28), inset 0 0 24px rgba(16, 185, 129, 0.08);
}
.hero-stats .stat-card--green .stat-card-icon {
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.35);
}
.hero-stats .stat-card--green .stat-number { color: #34d399; }

/* ── red (DARKWEB) ── */
.hero-stats .stat-card--red {
    border-color: rgba(239, 68, 68, 0.28);
    box-shadow: 0 0 18px rgba(239, 68, 68, 0.12), inset 0 0 20px rgba(239, 68, 68, 0.04);
}
.hero-stats .stat-card--red:hover {
    box-shadow: 0 8px 28px rgba(239, 68, 68, 0.28), inset 0 0 24px rgba(239, 68, 68, 0.08);
}
.hero-stats .stat-card--red .stat-card-icon {
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
    box-shadow: 0 0 12px rgba(239, 68, 68, 0.35);
    width: 40px;
    height: 40px;
    font-size: 1.15rem;
    flex-shrink: 0;
}
.hero-stats .stat-card--red .stat-number {
    color: #f87171;
    font-size: 1.55rem;
    letter-spacing: -0.03em;
}
.hero-stats .stat-card--red .stat-label {
    white-space: normal;
    line-height: 1.2;
}

/* ── shared number / label ── */
.stat-number {
    font-size: 1.8rem;
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.02em;
    white-space: nowrap;
    overflow: visible;
}

.stat-unit {
    font-size: 0.9rem;
    font-weight: 600;
    margin-left: 2px;
    vertical-align: baseline;
    opacity: 0.85;
}

.stat-number-sm {
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    margin-left: 2px;
    opacity: 0.88;
    display: inline-block;
}

.stat-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    line-height: 1.3;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* =============================================
   SECTIONS
   ============================================= */
.section {
    padding: 5rem 0;
}

.section-dark {
    background: rgba(0, 0, 0, 0.25);
}

.section-accent {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.03) 0%, rgba(124, 58, 237, 0.03) 100%);
    border-top: 1px solid rgba(0, 212, 255, 0.08);
    border-bottom: 1px solid rgba(0, 212, 255, 0.08);
}

.section-header {
    text-align: center;
    margin-bottom: 3.5rem;
}

.section-header h2 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 600px;
    margin: 0 auto;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.2);
    color: var(--primary-color);
    padding: 0.3rem 0.85rem;
    border-radius: 50px;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}

/* =============================================
   FEATURE CARDS
   ============================================= */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: var(--dark-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-1);
    opacity: 0;
    transition: opacity 0.3s;
}

.feature-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
}

.feature-icon i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* =============================================
   CURRICULUM SECTION
   ============================================= */
.curriculum-tabs {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.curriculum-tab {
    padding: 0.6rem 1.5rem;
    border-radius: 50px;
    border: 1px solid var(--border-color);
    background: var(--dark-card);
    color: var(--text-secondary);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.875rem;
    transition: all 0.3s;
}

.curriculum-tab.active,
.curriculum-tab:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.curriculum-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    align-items: stretch;
}

.curriculum-card {
    background: var(--dark-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
}

.curriculum-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: var(--shadow-lg);
}

.curriculum-card-header {
    padding: 1.25rem 1.5rem;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.08), rgba(124, 58, 237, 0.08));
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    border-bottom: 1px solid var(--border-color);
    min-height: 80px;
}

.curriculum-day-badge {
    background: var(--primary-color);
    color: #0a0f1e;
    padding: 0.3rem 0.75rem;
    border-radius: 50px;
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.curriculum-day-badge.day2 {
    background: #7c3aed;
    color: white;
}

.curriculum-day-badge.day3 {
    background: var(--accent-color);
    color: #0a0f1e;
}

.curriculum-card-header h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.4;
    word-break: keep-all;
    overflow-wrap: break-word;
}

.curriculum-items {
    padding: 1rem 1.5rem;
    flex: 1;
}

.curriculum-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.6rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.curriculum-item:last-child {
    border-bottom: none;
}

.curriculum-item i {
    color: var(--primary-color);
    margin-top: 0.2rem;
    flex-shrink: 0;
    font-size: 0.8rem;
}

/* =============================================
   TOOLS GRID
   ============================================= */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.tool-card {
    background: var(--dark-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.25rem;
    text-align: center;
    cursor: default;
    text-decoration: none;
}

.tool-icon {
    width: 48px;
    height: 48px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 0.75rem;
}

.tool-icon i {
    font-size: 1.25rem;
    color: var(--primary-color);
}

.tool-card h4 {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
    color: var(--text-primary);
}

.tool-card p {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.tool-tag {
    display: inline-block;
    background: rgba(0, 212, 255, 0.08);
    color: var(--primary-color);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.65rem;
    font-weight: 600;
    margin-top: 0.5rem;
}

/* =============================================
   ETHICS SECTION
   ============================================= */
.ethics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.ethics-card {
    background: var(--dark-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.75rem;
    position: relative;
    overflow: hidden;
}

.ethics-card.do {
    border-color: rgba(16, 185, 129, 0.3);
    background: rgba(16, 185, 129, 0.03);
}

.ethics-card.dont {
    border-color: rgba(239, 68, 68, 0.3);
    background: rgba(239, 68, 68, 0.03);
}

.ethics-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.ethics-title.do { color: var(--success-color); }
.ethics-title.dont { color: var(--danger-color); }

.ethics-item {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    padding: 0.4rem 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.ethics-item i.fa-check { color: var(--success-color); }
.ethics-item i.fa-times { color: var(--danger-color); }

/* =============================================
   VIDEO CARDS
   ============================================= */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.video-card {
    background: var(--dark-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s;
    cursor: pointer;
}

.video-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.video-thumbnail {
    position: relative;
    background: linear-gradient(135deg, #0d1224 0%, #1a1f3a 100%);
    aspect-ratio: 16/9;
    overflow: hidden;
}

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.85;
    transition: opacity 0.3s;
    display: block;
}

.video-card:hover .video-thumbnail img {
    opacity: 1;
}

.video-thumbnail.no-thumb {
    background: linear-gradient(135deg, #0d1224 0%, #1a1f3a 60%, #0f1e3a 100%);
}

.video-thumb-fallback {
    display: none;
    position: absolute;
    inset: 0;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    pointer-events: none;
}

.video-thumb-fallback i {
    font-size: 2.5rem;
    color: rgba(0, 212, 255, 0.35);
}

.video-thumb-fallback span {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.4);
    font-weight: 500;
    text-align: center;
    padding: 0 1rem;
}

.video-thumbnail.no-thumb .video-thumb-fallback {
    display: flex;
}

.video-play-btn {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.25);
    transition: background 0.3s;
    z-index: 2;
}

.video-play-btn i {
    font-size: 3.5rem;
    color: #ff0000;
    filter: drop-shadow(0 2px 12px rgba(0,0,0,0.7));
    transition: transform 0.2s, filter 0.2s;
}

.video-card:hover .video-play-btn {
    background: rgba(0,0,0,0.15);
}

.video-card:hover .video-play-btn i {
    transform: scale(1.1);
    filter: drop-shadow(0 4px 16px rgba(255,0,0,0.4));
}

.video-info {
    padding: 1.25rem;
}

.video-info h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
}

.video-info p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.video-meta {
    display: flex;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.video-tag {
    font-size: 0.7rem;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-weight: 600;
    background: rgba(0, 212, 255, 0.08);
    color: var(--primary-color);
}

/* =============================================
   TARGET AUDIENCE
   ============================================= */
.target-audience {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

.audience-item {
    text-align: center;
    flex: 1;
    min-width: 180px;
    max-width: 220px;
}

.audience-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: block;
    filter: drop-shadow(0 0 10px rgba(0, 212, 255, 0.3));
}

.audience-item h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.audience-item p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* =============================================
   PROCESS STEPS
   ============================================= */
.process-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.step {
    text-align: center;
    flex: 1;
    min-width: 120px;
    max-width: 180px;
}

.step-number {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 800;
    color: #0a0f1e;
    margin: 0 auto 0.75rem;
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}

.step h3 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
}

.step p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.step-arrow {
    color: var(--primary-color);
    font-size: 1.25rem;
    opacity: 0.5;
    flex-shrink: 0;
}

/* =============================================
   CTA BOX
   ============================================= */
.cta-box {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.08), rgba(124, 58, 237, 0.08));
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 20px;
    padding: 3rem;
    text-align: center;
}

.cta-box h3 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.cta-box p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* =============================================
   SCHEDULE TABLE
   ============================================= */
.schedule-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--dark-card);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.schedule-table th {
    background: rgba(0, 212, 255, 0.1);
    padding: 1rem 1.25rem;
    text-align: left;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--primary-color);
    border-bottom: 1px solid var(--border-color);
}

.schedule-table td {
    padding: 1rem 1.25rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(255,255,255,0.04);
    vertical-align: middle;
}

.schedule-table tr:last-child td {
    border-bottom: none;
}

.schedule-table tr:hover td {
    background: var(--dark-hover);
}

.day-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--primary-color);
    color: #0a0f1e;
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 800;
}

/* =============================================
   FORM STYLES
   ============================================= */
.page-container {
    min-height: calc(100vh - 70px - 80px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem 1rem;
    background: var(--gradient-hero);
}

.form-container {
    background: var(--dark-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2.5rem;
    width: 100%;
    max-width: 600px;
}

.form-container-small {
    max-width: 440px;
}

.form-header {
    text-align: center;
    margin-bottom: 2rem;
}

.form-header i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
    display: block;
    filter: drop-shadow(0 0 10px rgba(0, 212, 255, 0.5));
}

.form-header h1 {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 0.4rem;
}

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

.form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.form-group label i {
    color: var(--primary-color);
    font-size: 0.8rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    transition: all 0.3s;
    outline: none;
    min-width: 0;
    box-sizing: border-box;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
    background: rgba(0, 212, 255, 0.04);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
    font-size: 0.82rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.form-footer {
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.form-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

/* =============================================
   CUSTOM SELECT DROPDOWN
   ============================================= */
.custom-select {
    position: relative;
    width: 100%;
    user-select: none;
}

.custom-select__trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s;
}

.custom-select.open .custom-select__trigger {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
    background: rgba(0, 212, 255, 0.04);
}

.custom-select__value {
    color: var(--text-muted);
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.custom-select__value.selected {
    color: var(--text-primary);
}

.custom-select__arrow {
    color: var(--text-muted);
    font-size: 0.75rem;
    transition: transform 0.25s;
    flex-shrink: 0;
    margin-left: 0.5rem;
}

.custom-select.open .custom-select__arrow {
    transform: rotate(180deg);
}

.custom-select__dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    background: var(--dark-surface, #1a1f3a);
    border: 1px solid var(--primary-color);
    border-radius: 10px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.5);
    z-index: 999;
    max-height: 240px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) transparent;
}

.custom-select__dropdown::-webkit-scrollbar {
    width: 4px;
}
.custom-select__dropdown::-webkit-scrollbar-track {
    background: transparent;
}
.custom-select__dropdown::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

.custom-select.open .custom-select__dropdown {
    display: block;
}

.custom-select__option {
    padding: 0.65rem 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.custom-select__option:first-child {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.custom-select__option:hover {
    background: rgba(0, 212, 255, 0.1);
    color: var(--text-primary);
}

.custom-select__option.selected {
    background: rgba(0, 212, 255, 0.15);
    color: var(--primary-color);
    font-weight: 600;
}

/* =============================================
   MESSAGE / ALERTS
   ============================================= */
.message {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.875rem;
    display: none;
}

.message.success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--success-color);
    display: block;
}

.message.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--danger-color);
    display: block;
}

.message.info {
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.2);
    color: var(--primary-color);
    display: block;
}

/* =============================================
   DASHBOARD LAYOUT
   ============================================= */
.dashboard-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    min-height: calc(100vh - 62px);
}

.sidebar {
    background: var(--dark-card);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem 0;
    position: sticky;
    top: 62px;
    height: calc(100vh - 62px);
    overflow-y: auto;
}

.sidebar-section {
    margin-bottom: 1.5rem;
    padding: 0 1rem;
}

.sidebar-section-title {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    padding: 0 0.75rem;
    margin-bottom: 0.5rem;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 0.75rem;
    border-radius: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}

.sidebar-link i {
    width: 18px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.sidebar-link:hover,
.sidebar-link.active {
    background: rgba(0, 212, 255, 0.08);
    color: var(--primary-color);
    border: 1px solid rgba(0, 212, 255, 0.15);
}

.sidebar-link:hover i,
.sidebar-link.active i {
    color: var(--primary-color);
}

.sidebar-badge {
    margin-left: auto;
    background: var(--primary-color);
    color: #0a0f1e;
    padding: 0.1rem 0.45rem;
    border-radius: 10px;
    font-size: 0.65rem;
    font-weight: 700;
}

.main-content {
    padding: 2rem;
    overflow-y: auto;
}

/* =============================================
   DASHBOARD CARDS
   ============================================= */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.db-stat-card {
    background: var(--dark-card);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s;
}

.db-stat-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: var(--shadow-md);
}

.db-stat-card .stat-card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.db-stat-card .stat-card-icon.cyan { background: rgba(0, 212, 255, 0.12); }
.db-stat-card .stat-card-icon.purple { background: rgba(124, 58, 237, 0.12); }
.db-stat-card .stat-card-icon.green { background: rgba(16, 185, 129, 0.12); }
.db-stat-card .stat-card-icon.yellow { background: rgba(245, 158, 11, 0.12); }

.db-stat-card .stat-card-icon.cyan i { color: var(--primary-color); }
.db-stat-card .stat-card-icon.purple i { color: #7c3aed; }
.db-stat-card .stat-card-icon.green i { color: var(--success-color); }
.db-stat-card .stat-card-icon.yellow i { color: var(--warning-color); }

.db-stat-card .stat-card-icon i { font-size: 1.35rem; }

.db-stat-card .stat-card-info h3 {
    font-size: 1.75rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 0.2rem;
}

.db-stat-card .stat-card-info p {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* =============================================
   CONTENT CARDS
   ============================================= */
.content-card {
    background: var(--dark-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.content-card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.content-card-title {
    font-size: 1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.content-card-title i {
    color: var(--primary-color);
}

.content-card-body {
    padding: 1.5rem;
}

/* =============================================
   PROGRESS BAR
   ============================================= */
.progress-bar {
    background: var(--dark-hover);
    border-radius: 50px;
    height: 8px;
    overflow: hidden;
    margin-top: 0.4rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), #7c3aed);
    border-radius: 50px;
    transition: width 0.5s ease;
}

.progress-item {
    margin-bottom: 1rem;
}

.progress-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.3rem;
}

.progress-name {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.progress-value {
    font-size: 0.8rem;
    color: var(--primary-color);
    font-weight: 700;
}

/* =============================================
   TABLE STYLES
   ============================================= */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th {
    text-align: left;
    padding: 0.75rem 1rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
}

.data-table td {
    padding: 0.85rem 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(255,255,255,0.04);
    vertical-align: middle;
}

.data-table tr:last-child td {
    border-bottom: none;
}

.data-table tr:hover td {
    background: var(--dark-hover);
}

/* =============================================
   BADGE / TAG
   ============================================= */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
    font-size: 0.7rem;
    font-weight: 700;
}

.badge-primary { background: rgba(0, 212, 255, 0.12); color: var(--primary-color); }
.badge-success { background: rgba(16, 185, 129, 0.12); color: var(--success-color); }
.badge-warning { background: rgba(245, 158, 11, 0.12); color: var(--warning-color); }
.badge-danger { background: rgba(239, 68, 68, 0.12); color: var(--danger-color); }
.badge-purple { background: rgba(124, 58, 237, 0.12); color: #7c3aed; }

/* =============================================
   MODAL
   ============================================= */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.75);
    backdrop-filter: blur(4px);
    z-index: 9000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem 1rem;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--dark-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2rem;
    width: 100%;
    max-width: 560px;
    transform: scale(0.95);
    transition: transform 0.3s;
}

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

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.modal-header h2 i { color: var(--primary-color); }

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.25rem;
    transition: color 0.3s;
}

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

/* =============================================
   TABS
   ============================================= */
.tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
    gap: 0.5rem;
    overflow-x: auto;
}

.tab {
    padding: 0.6rem 1.25rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    border: none;
    background: none;
    cursor: pointer;
    transition: all 0.3s;
    border-bottom: 2px solid transparent;
    white-space: nowrap;
}

.tab.active,
.tab:hover {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

/* =============================================
   LEADERBOARD
   ============================================= */
.leaderboard-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.04);
}

.leaderboard-item:last-child { border-bottom: none; }

.rank-badge {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 800;
    flex-shrink: 0;
}

.rank-1 { background: rgba(245, 158, 11, 0.2); color: #f59e0b; }
.rank-2 { background: rgba(148, 163, 184, 0.2); color: #94a3b8; }
.rank-3 { background: rgba(180, 83, 9, 0.2); color: #b45309; }
.rank-other { background: var(--dark-hover); color: var(--text-muted); }

.leaderboard-name {
    flex: 1;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.leaderboard-score {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* =============================================
   LEADERBOARD (new full layout)
   ============================================= */
.leaderboard-row {
    display: grid;
    grid-template-columns: 52px 1fr auto auto;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 1.2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    transition: background 0.15s;
}
.leaderboard-row:hover {
    background: rgba(255, 255, 255, 0.03);
}
.leaderboard-row.current-user {
    background: rgba(99, 102, 241, 0.07);
    border-left: 3px solid rgba(99, 102, 241, 0.6);
}
.leaderboard-row.current-user:hover {
    background: rgba(99, 102, 241, 0.1);
}
.leaderboard-rank {
    text-align: center;
    font-size: 0.82rem;
    font-weight: 700;
    color: #64748b;
}
.leaderboard-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.78rem;
    font-weight: 800;
    color: #94a3b8;
    flex-shrink: 0;
}
.leaderboard-info {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    min-width: 0;
}

/* =============================================
   SEARCH & FILTER
   ============================================= */
.search-bar {
    position: relative;
}

.search-bar input {
    padding-left: 2.5rem;
    width: 100%;
}

.search-bar i {
    position: absolute;
    left: 0.85rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.85rem;
    pointer-events: none;
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
    background: #060b17;
    border-top: 1px solid rgba(0, 212, 255, 0.08);
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.footer-section p,
.footer-section a {
    color: var(--text-muted);
    font-size: 0.85rem;
    line-height: 2;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s;
}

.footer-section a:hover { color: var(--primary-color); }

.footer-section i { color: var(--primary-color); font-size: 0.8rem; }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.05);
    padding-top: 1.5rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 900px) {
    .dashboard-layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        display: block;            /* display 고정 — transform으로만 숨김/표시 */
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: 270px;
        max-width: 85vw;
        z-index: 1100;             /* navbar(1000) + 오버레이(1050) 보다 위 */
        height: 100vh;
        overflow-y: auto;
        border-right: 1px solid rgba(255,255,255,0.12);
        box-shadow: 4px 0 40px rgba(0,0,0,0.6);
        transform: translateX(-100%);  /* 기본: 왼쪽 밖으로 숨김 */
        transition: transform 0.25s cubic-bezier(0.4,0,0.2,1);
        padding-top: 1rem;
        visibility: hidden;        /* 숨김 상태에선 포커스/클릭 차단 */
    }

    .sidebar.open {
        transform: translateX(0);
        visibility: visible;
    }
}

@media (max-width: 768px) {
    .hero { padding: 4rem 0 3rem; min-height: auto; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 0.65rem; }
    .hero-stats .stat-card { padding: 0.8rem 1rem; }
    .stat-number { font-size: 1.5rem; }
    .hero-stats .stat-card-icon { width: 38px; height: 38px; font-size: 1.1rem; }
    .section { padding: 3.5rem 0; }
    .section-header h2 { font-size: 1.7rem; }
    .form-container { padding: 1.75rem; }
    .form-row { grid-template-columns: 1fr; }
    .process-steps { gap: 0.5rem; }
    .step-arrow { display: none; }
    .main-content { padding: 1.25rem; }
    .curriculum-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .hero-cta { flex-direction: column; align-items: center; }
    .nav-links .btn-secondary { display: none; }
    .curriculum-grid { grid-template-columns: 1fr; }
    .curriculum-card { min-height: unset; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
}

/* =============================================
   UTILS
   ============================================= */
.text-center { text-align: center; }
.text-primary-color { color: var(--primary-color) !important; }
.text-success { color: var(--success-color) !important; }
.text-danger { color: var(--danger-color) !important; }
.text-warning { color: var(--warning-color) !important; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-center { display: flex; justify-content: center; align-items: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.hidden { display: none !important; }
.dashboard-section { display: block; }
.dashboard-section.hidden { display: none !important; }
.divider { height: 1px; background: var(--border-color); margin: 1.5rem 0; }

/* =============================================
   MODAL OVERLAY 확장 (addFlagModal, addQuizModal 등)
   modal-overlay.active 방식으로 통일
   ============================================= */
.modal-overlay .modal-content {
    background: var(--dark-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    width: 100%;
    transform: scale(0.97);
    transition: transform 0.3s;
}
.modal-overlay.active .modal-content {
    transform: scale(1);
}

/* =============================================
   COMMUNITY BOARD (커뮤니티 게시판)
   ============================================= */
.community-wrap {
    display: flex;
    flex-direction: column;
    height: 620px;
    background: var(--dark-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
}

/* 헤더 */
.community-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1.2rem;
    border-bottom: 1px solid var(--border-color);
    background: rgba(0,212,255,0.04);
    flex-shrink: 0;
}
.community-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-primary);
}
.community-title i { color: #00d4ff; }
.community-live-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #4ade80;
    box-shadow: 0 0 6px #4ade80;
    animation: comm-pulse 2s infinite;
}
@keyframes comm-pulse {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0.45; }
}
.community-header-actions {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}
.community-count {
    font-size: 0.78rem;
    color: var(--text-muted);
}
.community-refresh-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-muted);
    padding: 0.25rem 0.5rem;
    cursor: pointer;
    font-size: 0.78rem;
    transition: color 0.2s, border-color 0.2s;
}
.community-refresh-btn:hover { color: #00d4ff; border-color: #00d4ff; }

/* 고정글 영역 */
.community-pinned-area {
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid rgba(251,191,36,0.2);
    background: rgba(251,191,36,0.04);
    flex-shrink: 0;
    max-height: 140px;
    overflow-y: auto;
}

/* 피드 */
.community-feed {
    flex: 1;
    overflow-y: auto;
    padding: 0.75rem 0.85rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    scroll-behavior: smooth;
}
.community-feed::-webkit-scrollbar { width: 4px; }
.community-feed::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.12); border-radius: 4px; }

/* 로딩 / 빈 상태 */
.community-loading,
.community-empty {
    text-align: center;
    color: var(--text-muted);
    padding: 2rem 1rem;
    font-size: 0.875rem;
    line-height: 1.8;
}
.community-empty i { font-size: 1.5rem; margin-bottom: 0.5rem; display: block; }

/* 새 글 뱃지 */
.community-new-badge {
    position: relative;
    margin: 0 0.85rem;
    background: rgba(0,212,255,0.12);
    border: 1px solid rgba(0,212,255,0.35);
    border-radius: 8px;
    color: #00d4ff;
    font-size: 0.78rem;
    font-weight: 600;
    padding: 0.35rem 0.75rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    flex-shrink: 0;
    transition: background 0.2s;
}
.community-new-badge:hover { background: rgba(0,212,255,0.2); }

/* ── 게시글 카드 ── */
.comm-post {
    display: flex;
    flex-direction: column;
}
.comm-post--me {
    align-items: flex-end;
}
.comm-post--me .comm-post-inner {
    background: rgba(0,212,255,0.08);
    border-color: rgba(0,212,255,0.25);
}
.comm-post--admin .comm-post-inner {
    background: rgba(167,139,250,0.07);
    border-color: rgba(167,139,250,0.3);
}
.comm-post--pinned .comm-post-inner {
    background: rgba(251,191,36,0.06);
    border-color: rgba(251,191,36,0.3);
}
.comm-post-inner {
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0.65rem 0.9rem;
    max-width: 85%;
    min-width: 120px;
    transition: border-color 0.2s;
}
.comm-post-header {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    margin-bottom: 0.3rem;
    flex-wrap: wrap;
}
.comm-nick {
    font-weight: 700;
    font-size: 0.8rem;
    color: #e2e8f0;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}
.comm-time {
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-left: auto;
}
.comm-post-body {
    font-size: 0.875rem;
    color: #cbd5e1;
    line-height: 1.55;
    word-break: break-word;
}

/* 관리자 / 고정 뱃지 */
.comm-admin-badge {
    font-size: 0.65rem;
    font-weight: 700;
    color: #a78bfa;
    background: rgba(167,139,250,0.12);
    border: 1px solid rgba(167,139,250,0.3);
    border-radius: 4px;
    padding: 0 0.35rem;
    line-height: 1.5;
}
.comm-pin-badge {
    font-size: 0.65rem;
    font-weight: 700;
    color: #fbbf24;
    background: rgba(251,191,36,0.1);
    border: 1px solid rgba(251,191,36,0.3);
    border-radius: 4px;
    padding: 0 0.35rem;
    line-height: 1.5;
}

/* 어드민 액션 버튼 */
.comm-actions {
    display: flex;
    gap: 0.3rem;
    margin-left: 0.3rem;
}
.comm-pin-btn,
.comm-del-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.72rem;
    padding: 0.2rem 0.3rem;
    border-radius: 4px;
    transition: background 0.15s, color 0.15s;
}
.comm-pin-btn { color: #64748b; }
.comm-pin-btn:hover { color: #fbbf24; background: rgba(251,191,36,0.1); }
.comm-pin-btn .pinned { color: #fbbf24; }
.comm-del-btn { color: #64748b; }
.comm-del-btn:hover { color: #f87171; background: rgba(248,113,113,0.1); }

/* 입력 영역 */
.community-input-area {
    padding: 0.75rem 0.85rem 0.85rem;
    border-top: 1px solid var(--border-color);
    background: rgba(255,255,255,0.02);
    flex-shrink: 0;
}
.community-input-row {
    display: flex;
    gap: 0.6rem;
    align-items: flex-end;
}
.community-textarea {
    flex: 1;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.875rem;
    padding: 0.6rem 0.85rem;
    resize: none;
    outline: none;
    font-family: inherit;
    line-height: 1.5;
    transition: border-color 0.2s;
    min-height: 44px;
    max-height: 120px;
}
.community-textarea:focus {
    border-color: rgba(0,212,255,0.45);
}
.community-textarea::placeholder { color: var(--text-muted); }
.community-send-btn {
    background: linear-gradient(135deg, #0ea5e9, #0284c7);
    border: none;
    border-radius: 10px;
    color: #fff;
    font-size: 0.95rem;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
    transition: opacity 0.2s, transform 0.15s;
}
.community-send-btn:hover:not(:disabled) { opacity: 0.85; transform: scale(1.04); }
.community-send-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.community-input-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.3rem;
}
.community-char-count {
    font-size: 0.72rem;
    color: var(--text-muted);
}
.community-shortcut {
    font-size: 0.72rem;
    color: var(--text-muted);
}

/* 기수 뱃지 (커뮤니티) */
.comm-cohort-badge {
    font-size: 0.65rem;
    font-weight: 700;
    color: #34d399;
    background: rgba(52,211,153,0.1);
    border: 1px solid rgba(52,211,153,0.3);
    border-radius: 4px;
    padding: 0 0.35rem;
    line-height: 1.5;
    white-space: nowrap;
}