/* ============================================
   AI&디지털콘텐츠연구소 - Main Stylesheet
   Style Reference: Dark/Light alternating sections
   Color: Hot Pink #FF5C9E + Purple gradient
   Font: Paperlogy
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
    /* Dark Theme Colors */
    --dark-bg: #0D0B1A;
    --dark-card: #1A1730;
    --dark-border: #2D2747;
    --dark-hover: #252240;

    /* Light Theme Colors */
    --light-bg: #FFFFFF;
    --light-section: #F3F4F6;
    --light-card: #F9FAFB;

    /* Brand Colors - Hot Pink base */
    --pink-main: #FF5C9E;
    --pink-light: #FF85B8;
    --pink-dark: #E8458A;
    --purple-main: #8B5CF6;
    --purple-light: #A78BFA;
    --purple-dark: #7C3AED;
    --fuchsia: #D946EF;

    /* Accent */
    --amber: #F59E0B;
    --green: #22C55E;
    --gold: #FFD700;

    /* Text */
    --text-white: #FFFFFF;
    --text-dark: #111827;
    --text-gray-dark: #1F2937;
    --text-gray: #6B7280;
    --text-gray-light: #9CA3AF;
    --text-muted-dark: #B0A8C8;

    /* Gradients */
    --gradient-brand: linear-gradient(135deg, #FF5C9E 0%, #C850C0 50%, #8B5CF6 100%);
    --gradient-btn: linear-gradient(135deg, #8B5CF6 0%, #D946EF 50%, #FF5C9E 100%);
    --gradient-text: linear-gradient(135deg, #FF5C9E, #D946EF, #8B5CF6);
    --gradient-hero: linear-gradient(135deg, #0D0B1A 0%, #1A1135 50%, #0D0B1A 100%);
    --gradient-dark-card: linear-gradient(135deg, rgba(255,92,158,0.05) 0%, rgba(139,92,246,0.05) 100%);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --shadow-glow-pink: 0 0 40px rgba(255,92,158,0.2);
    --shadow-glow-purple: 0 0 40px rgba(139,92,246,0.2);

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 50px;

    /* Transition */
    --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-slow: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Paperlogy', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-weight: 400;
    color: var(--text-dark);
    background: var(--dark-bg);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul, ol { list-style: none; }

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ---------- Utility ---------- */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- Scroll Progress ---------- */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--gradient-btn);
    z-index: 10001;
    transition: width 0.1s linear;
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 9999;
    padding: 16px 0;
    background: var(--dark-bg);
    border-bottom: 1px solid rgba(255,255,255,0.05);
    transition: var(--transition);
}

.navbar.scrolled {
    padding: 10px 0;
    background: rgba(13,11,26,0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

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

.nav-logo {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.nav-logo-name {
    font-weight: 800;
    font-size: 1.15rem;
    color: var(--text-white);
}

.nav-logo-sub {
    font-size: 0.7rem;
    font-weight: 400;
    color: #FF5C9E;
    letter-spacing: 0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: rgba(255,255,255,0.75);
    position: relative;
    padding: 4px 0;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-white);
}

.nav-cta-btn {
    padding: 10px 22px !important;
    background: var(--purple-main) !important;
    color: white !important;
    border-radius: var(--radius-full);
    font-weight: 600 !important;
    font-size: 0.85rem !important;
    transition: var(--transition) !important;
}

.nav-cta-btn:hover {
    background: var(--purple-dark) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(139,92,246,0.4) !important;
}

/* Nav Social Buttons */
.nav-social-links {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: 8px;
    flex-shrink: 0;
}

.nav-social-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    line-height: 0;
}

.nav-social-btn svg {
    display: block;
}

.nav-social-btn:hover {
    transform: translateY(-2px) scale(1.1);
    filter: brightness(1.15);
}

/* Mobile Nav Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 100;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-white);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ============================================
   HERO SECTION - Dark
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: stretch;
    background: var(--dark-bg);
    overflow: hidden;
    padding-top: 80px;
    padding-bottom: 0;
}

/* Purple glow */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 60%;
    height: 80%;
    background: radial-gradient(ellipse at 20% 30%, rgba(139,92,246,0.12) 0%, transparent 60%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 50%;
    height: 60%;
    background: radial-gradient(ellipse at 80% 80%, rgba(255,92,158,0.08) 0%, transparent 60%);
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 50px;
    min-height: calc(100vh - 80px);
    padding-top: 20px;
    padding-bottom: 40px;
}

.hero-content {
    flex: 1;
    text-align: left;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: rgba(255,92,158,0.15);
    border: 1px solid rgba(255,92,158,0.3);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    color: #FF85B8;
    margin-bottom: 28px;
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #FF5C9E;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 900;
    line-height: 1.25;
    color: var(--text-white);
    margin-bottom: 20px;
    text-align: left;
}

.hero-title .gradient-text {
    color: #FF5C9E;
}

.hero-desc {
    font-size: 1rem;
    font-weight: 300;
    color: var(--text-muted-dark);
    line-height: 1.8;
    margin-bottom: 16px;
    text-align: left;
}

/* Hero SNS Links */
.hero-sns-links {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    justify-content: flex-start;
}

.hero-sns-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px 6px 8px;
    border-radius: 20px;
    border: 1px solid rgba(255,255,255,0.15);
    background: rgba(255,255,255,0.05);
    color: #fff;
    font-size: 0.85rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    line-height: 1;
}

.hero-sns-btn svg {
    display: block;
    flex-shrink: 0;
}

.hero-sns-btn:hover {
    background: rgba(255,255,255,0.12);
    border-color: rgba(255,255,255,0.3);
    transform: translateY(-1px);
}

/* Hero CTA Text */
.hero-cta-text {
    font-size: 1.15rem;
    font-weight: 700;
    background: linear-gradient(90deg, #8B2BE2, #D94FA0, #F595C4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 28px;
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: flex-start;
    text-align: left;
}

.hero-cta-text::before {
    content: '▸';
    font-size: 1.2rem;
}

/* Hash Tags */
.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 32px;
    justify-content: flex-start;
}

.hero-tag-chip {
    padding: 7px 16px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-full);
    font-size: 0.82rem;
    font-weight: 400;
    color: var(--text-muted-dark);
    transition: var(--transition);
}

.hero-tag-chip:hover {
    border-color: #FF5C9E;
    color: #FF85B8;
    background: rgba(255,92,158,0.08);
}

/* Hero CTA Buttons */
.hero-btns {
    display: flex;
    gap: 14px;
    margin-bottom: 50px;
    justify-content: flex-start;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 28px;
    border-radius: var(--radius-md);
    font-family: 'Paperlogy', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
}

.btn-primary {
    background: var(--gradient-btn);
    color: white;
    box-shadow: 0 4px 20px rgba(255,92,158,0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255,92,158,0.35);
}

.btn-secondary {
    background: var(--dark-card);
    color: var(--text-muted-dark);
    border: 1px solid var(--dark-border);
}

.btn-secondary:hover {
    background: var(--dark-hover);
    color: var(--text-white);
    border-color: rgba(255,255,255,0.15);
}

/* Hero Stats */
.hero-stats {
    display: flex;
    gap: 40px;
    padding-top: 32px;
    border-top: 1px solid rgba(255,255,255,0.08);
    justify-content: flex-start;
}

.hero-stat-num {
    font-size: 2rem;
    font-weight: 900;
    line-height: 1.1;
}

.hero-stat-num .num-highlight {
    color: #FF5C9E;
}

.hero-stat-num .num-unit {
    color: var(--text-white);
    font-size: 1.2rem;
}

.hero-stat-label {
    font-size: 0.8rem;
    font-weight: 400;
    color: var(--text-gray-light);
    margin-top: 4px;
}

/* Hero Visual */
.hero-visual {
    flex: 0 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.hero-photo-frame {
    width: 380px;
    height: 475px;
    border-radius: 20px;
    overflow: hidden;
    border: 3px solid rgba(255,255,255,0.1);
    box-shadow: 0 20px 60px rgba(0,0,0,0.4), 0 0 80px rgba(139,92,246,0.1);
    flex-shrink: 0;
}

.hero-profile-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    display: block;
}

/* ============================================
   SECTION COMMON
   ============================================ */
.section-dark {
    background: var(--dark-bg);
    color: var(--text-white);
}

.section-light {
    background: var(--light-bg);
    color: var(--text-dark);
}

.section-gray {
    background: var(--light-section);
    color: var(--text-dark);
}

.section-padding {
    padding: 100px 0;
}

.section-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: 0.9rem;
    font-weight: 600;
    color: #FF5C9E;
    margin-bottom: 16px;
}

.section-label::before,
.section-label::after {
    content: '';
    width: 24px;
    height: 2px;
    background: #FF5C9E;
    opacity: 0.5;
}

.section-title {
    text-align: center;
    font-size: 2.4rem;
    font-weight: 900;
    line-height: 1.3;
    margin-bottom: 16px;
}

.section-dark .section-title { color: var(--text-white); }
.section-light .section-title,
.section-gray .section-title { color: var(--text-dark); }

.section-desc {
    text-align: center;
    font-size: 1rem;
    font-weight: 300;
    max-width: 550px;
    margin: 0 auto 60px;
}

.section-dark .section-desc { color: var(--text-gray-light); }
.section-light .section-desc,
.section-gray .section-desc { color: var(--text-gray); }

/* ============================================
   ABOUT SECTION - Light
   ============================================ */
.about .container {
    display: flex;
    align-items: flex-start;
    gap: 70px;
}

.about-visual {
    flex: 0 0 300px;
    position: relative;
}

.about-photo {
    width: 300px;
    height: 370px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: linear-gradient(135deg, var(--light-section), #E8E0F0);
}

.about-profile-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    display: block;
}

.about-photo-placeholder i {
    font-size: 3.5rem;
    color: #FF5C9E;
    opacity: 0.3;
}

.about-photo-placeholder span {
    font-size: 0.8rem;
    color: var(--text-gray);
}

.about-year-badge {
    text-align: center;
    margin-top: 20px;
}

.about-year-badge .year {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--text-dark);
}

.about-year-badge .year-label {
    font-size: 0.8rem;
    color: var(--text-gray);
    font-weight: 400;
}

.about-content {
    flex: 1;
}

.about-label {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9rem;
    font-weight: 600;
    color: #FF5C9E;
    margin-bottom: 16px;
}

.about-label::before {
    content: '';
    width: 24px;
    height: 2px;
    background: #FF5C9E;
    opacity: 0.5;
}

.about-heading {
    font-size: 2.2rem;
    font-weight: 900;
    line-height: 1.3;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.about-text {
    font-size: 0.95rem;
    color: var(--text-gray);
    font-weight: 300;
    line-height: 1.8;
    margin-bottom: 32px;
}

.about-text strong {
    color: var(--text-dark);
    font-weight: 600;
}

/* Credentials List */
.credentials-list {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin-bottom: 32px;
}

.credential-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 0;
    border-bottom: 1px solid var(--light-section);
    transition: var(--transition);
}

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

.credential-item:hover {
    padding-left: 8px;
}

.credential-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.credential-icon.pink { background: rgba(255,92,158,0.12); color: #FF5C9E; }
.credential-icon.purple { background: rgba(139,92,246,0.12); color: var(--purple-main); }
.credential-icon.amber { background: rgba(245,158,11,0.12); color: var(--amber); }
.credential-icon.green { background: rgba(34,197,94,0.12); color: var(--green); }
.credential-icon.fuchsia { background: rgba(217,70,239,0.12); color: var(--fuchsia); }
.credential-icon.blue { background: rgba(59,130,246,0.12); color: #3B82F6; }

.credential-item span {
    font-size: 0.93rem;
    font-weight: 500;
    color: var(--text-gray-dark);
}

/* About Tags */
.about-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.about-tag {
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid;
}

.about-tag.pink { border-color: rgba(255,92,158,0.3); color: #FF5C9E; background: rgba(255,92,158,0.05); }
.about-tag.purple { border-color: rgba(139,92,246,0.3); color: var(--purple-main); background: rgba(139,92,246,0.05); }
.about-tag.amber { border-color: rgba(245,158,11,0.3); color: var(--amber); background: rgba(245,158,11,0.05); }
.about-tag.green { border-color: rgba(34,197,94,0.3); color: var(--green); background: rgba(34,197,94,0.05); }

/* ============================================
   ACHIEVEMENTS SECTION - Dark
   ============================================ */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.achieve-card {
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    transition: var(--transition);
}

.achieve-card:hover {
    border-color: rgba(255,92,158,0.2);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow-pink);
}

.achieve-emoji {
    font-size: 2.2rem;
    margin-bottom: 16px;
    display: block;
}

.achieve-num {
    font-size: 2.8rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 8px;
}

.achieve-num .num-color-pink {
    color: #FF5C9E;
}

.achieve-num .num-color-green {
    color: var(--green);
}

.achieve-num .num-color-amber {
    color: var(--amber);
}

.achieve-num .num-color-purple {
    color: var(--purple-light);
}

.achieve-num .num-unit {
    color: var(--text-white);
    font-size: 1.4rem;
    font-weight: 700;
}

.achieve-label {
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--text-gray-light);
}

/* ============================================
   EDUCATION SECTION - Light (Tabs UI)
   ============================================ */
.edu-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 40px;
}

.edu-tab {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    border-radius: var(--radius-full);
    font-family: 'Paperlogy', sans-serif;
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid var(--light-section);
    background: var(--light-bg);
    color: var(--text-gray);
    transition: var(--transition);
}

.edu-tab:hover {
    border-color: #FF5C9E;
    color: #FF5C9E;
}

.edu-tab.active {
    background: #FF5C9E;
    color: white;
    border-color: #FF5C9E;
}

.edu-tab i {
    font-size: 0.8rem;
}

/* Education Content Card */
.edu-content-card {
    background: var(--light-section);
    border-radius: var(--radius-lg);
    padding: 40px;
    display: none;
}

.edu-content-card.active {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    animation: fadeIn 0.4s ease;
}

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

.edu-card-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.edu-card-badge.pink { background: rgba(255,92,158,0.1); color: #FF5C9E; }
.edu-card-badge.purple { background: rgba(139,92,246,0.1); color: var(--purple-main); }
.edu-card-badge.amber { background: rgba(245,158,11,0.1); color: var(--amber); }
.edu-card-badge.green { background: rgba(34,197,94,0.1); color: var(--green); }

.edu-card-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 14px;
    line-height: 1.35;
}

.edu-card-desc {
    font-size: 0.93rem;
    color: var(--text-gray);
    font-weight: 300;
    line-height: 1.7;
    margin-bottom: 20px;
}

.edu-info-row {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.88rem;
    margin-bottom: 8px;
}

.edu-info-row i {
    color: #FF5C9E;
    font-size: 0.85rem;
    width: 16px;
}

.edu-info-row strong {
    color: var(--text-dark);
    font-weight: 600;
}

.edu-info-row span {
    color: var(--text-gray);
    font-weight: 400;
}

.edu-card-cta {
    margin-top: 24px;
}

/* Education Right - 출강 기관 */
.edu-right-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-gray-dark);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid #E5E7EB;
}

.edu-org-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.edu-org-tag {
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 400;
    background: var(--light-bg);
    border: 1px solid #E5E7EB;
    color: var(--text-gray);
}

/* ============================================
   REVIEWS SECTION - Gray
   ============================================ */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 50px;
}

.review-card {
    background: var(--light-bg);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.review-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.review-stars {
    display: flex;
    gap: 2px;
    margin-bottom: 16px;
}

.review-stars i {
    color: var(--amber);
    font-size: 0.9rem;
}

.review-text {
    font-size: 0.93rem;
    color: var(--text-gray-dark);
    font-weight: 400;
    line-height: 1.7;
    margin-bottom: 20px;
    min-height: 80px;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.review-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.review-avatar.blue { background: #3B82F6; }
.review-avatar.orange { background: #F97316; }
.review-avatar.purple { background: var(--purple-main); }

.review-name {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-dark);
}

.review-role {
    font-size: 0.78rem;
    color: var(--text-gray);
    font-weight: 400;
}

/* Institution Logos */
.institution-tags {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
}

.institution-tag {
    padding: 8px 18px;
    border: 1px solid #E5E7EB;
    border-radius: var(--radius-full);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-gray);
    background: var(--light-bg);
}

/* ============================================
   BOOKS & AWARDS SECTION - Light
   ============================================ */
.credentials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.cred-column h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 2px solid var(--light-section);
}

.cred-column h3 .emoji {
    font-size: 1.2rem;
}

/* Book Items */
.book-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 0;
    border-bottom: 1px solid var(--light-section);
}

.book-color {
    width: 8px;
    height: 32px;
    border-radius: 3px;
    flex-shrink: 0;
}

.book-item span {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text-gray-dark);
}

/* Award Items */
.award-item {
    background: var(--light-section);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 14px;
}

.award-item .award-emoji {
    font-size: 1.6rem;
    margin-bottom: 10px;
    display: block;
}

.award-item h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.award-item p {
    font-size: 0.82rem;
    color: var(--text-gray);
    font-weight: 300;
}

/* Certification Items */
.cert-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 0;
    border-bottom: 1px solid var(--light-section);
}

.cert-item i {
    color: var(--purple-main);
    font-size: 0.85rem;
}

.cert-item span {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text-gray-dark);
}

.cert-more {
    text-align: right;
    margin-top: 12px;
    font-size: 0.85rem;
    font-weight: 600;
    color: #FF5C9E;
}

/* ============================================
   FAQ SECTION - Gray
   ============================================ */
.faq-list {
    max-width: 780px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--light-bg);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-dark);
    transition: var(--transition);
}

.faq-question:hover {
    color: #FF5C9E;
}

.faq-question .faq-icon {
    font-size: 1.1rem;
    color: var(--text-gray);
    transition: var(--transition);
    flex-shrink: 0;
}

.faq-item.open .faq-question .faq-icon {
    transform: rotate(45deg);
    color: #FF5C9E;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.open .faq-answer {
    max-height: 200px;
    padding: 0 24px 18px;
}

.faq-answer p {
    font-size: 0.9rem;
    color: var(--text-gray);
    font-weight: 300;
    line-height: 1.7;
}

/* ============================================
   CONTACT SECTION - Dark
   ============================================ */
.contact-header {
    text-align: center;
    margin-bottom: 60px;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 50px;
    align-items: start;
}

.contact-info h3 {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--text-white);
    margin-bottom: 28px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 20px;
}

.contact-item-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: white;
    flex-shrink: 0;
}

.contact-item-icon.pink { background: #FF5C9E; }
.contact-item-icon.purple { background: var(--purple-main); }
.contact-item-icon.red { background: #EF4444; }

.contact-item-text .label {
    font-size: 0.75rem;
    color: var(--text-gray-light);
    font-weight: 400;
}

.contact-item-text .value {
    font-size: 0.95rem;
    color: var(--text-white);
    font-weight: 600;
}

.contact-info-card {
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-top: 24px;
}

.contact-info-card strong {
    display: block;
    color: var(--text-white);
    font-weight: 700;
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.contact-info-card span {
    display: block;
    color: var(--text-gray-light);
    font-size: 0.82rem;
    font-weight: 300;
    line-height: 1.6;
}

/* Contact Form */
.contact-form-wrapper {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group label {
    display: block;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-gray-light);
    margin-bottom: 6px;
}

.form-group label .req {
    color: #FF5C9E;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 13px 16px;
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-sm);
    font-family: 'Paperlogy', sans-serif;
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text-white);
    outline: none;
    transition: var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-gray-light);
    opacity: 0.5;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: #FF5C9E;
    box-shadow: 0 0 0 3px rgba(255,92,158,0.1);
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%239CA3AF' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

.form-group select option {
    background: var(--dark-card);
    color: var(--text-white);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.btn-submit {
    width: 100%;
    padding: 15px;
    font-size: 1rem;
    background: var(--gradient-btn);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-family: 'Paperlogy', sans-serif;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255,92,158,0.3);
}

/* ============================================
   FOOTER - Dark
   ============================================ */
.footer {
    background: var(--dark-bg);
    border-top: 1px solid rgba(255,255,255,0.05);
    padding: 30px 0;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    margin-bottom: 16px;
}

.footer-brand {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
    font-weight: 300;
}

.footer-brand strong {
    color: rgba(255,255,255,0.8);
    font-weight: 600;
}

.footer-links-row {
    display: flex;
    gap: 20px;
}

.footer-links-row a {
    font-size: 0.82rem;
    color: rgba(255,255,255,0.4);
    font-weight: 400;
}

.footer-links-row a:hover {
    color: #FF5C9E;
}

.footer-bottom {
    text-align: left;
    font-size: 0.78rem;
    color: rgba(255,255,255,0.3);
    font-weight: 300;
}

/* ============================================
   ANIMATIONS
   ============================================ */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
        align-items: center;
        min-height: auto;
        padding-top: 40px;
        padding-bottom: 40px;
    }
    .hero-content { order: 2; }
    .hero-visual { order: 1; }
    .hero-tags { justify-content: center; }
    .hero-btns { justify-content: center; }
    .hero-stats { justify-content: center; }
    .hero-sns-links { justify-content: center; }
    .hero-title { font-size: 2.6rem; }
    .hero-cta-text { justify-content: center; }
    .hero-photo-frame { width: 280px; height: 350px; }

    .about .container {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .about-label { justify-content: center; }
    .about-label::before { display: none; }
    .about-tags { justify-content: center; }

    .achievements-grid { grid-template-columns: repeat(2, 1fr); }
    .edu-content-card.active { grid-template-columns: 1fr; }
    .reviews-grid { grid-template-columns: repeat(2, 1fr); }
    .credentials-grid { grid-template-columns: 1fr; }
    .contact-wrapper { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--dark-bg);
        border-left: 1px solid var(--dark-border);
        flex-direction: column;
        align-items: flex-start;
        padding: 100px 32px 40px;
        gap: 16px;
        transition: var(--transition);
        z-index: 98;
    }

    .nav-links.open { right: 0; }
    .nav-toggle { display: flex; }

    .nav-social-links {
        display: flex;
        flex-direction: row;
        gap: 10px;
        margin-left: 0;
        margin-right: 60px;
    }
    .nav-social-btn svg {
        width: 28px;
        height: auto;
    }

    .hero-title { font-size: 2rem; }
    .hero-visual { width: 100%; }
    .hero-photo-frame { width: 240px; height: 300px; margin: 0 auto; }
    .hero-stats { flex-wrap: wrap; gap: 24px; }

    .about-visual { flex: unset; }
    .about-photo { width: 240px; height: 300px; }

    .achievements-grid { grid-template-columns: repeat(2, 1fr); }
    .reviews-grid { grid-template-columns: 1fr; }
    .edu-tabs { gap: 6px; }
    .edu-tab { font-size: 0.8rem; padding: 8px 14px; }

    .section-title { font-size: 1.8rem; }
    .section-padding { padding: 70px 0; }

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

    .footer-top { flex-direction: column; gap: 12px; align-items: flex-start; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 1.7rem; }
    .hero-btns { flex-direction: column; width: 100%; }
    .hero-btns .btn { width: 100%; justify-content: center; }
    .hero-stats { flex-direction: column; align-items: center; }

    .achievements-grid { grid-template-columns: 1fr; }
    .section-title { font-size: 1.5rem; }

    .about-photo { width: 200px; height: 250px; }
}