/* --- CSS VARIABLES & TOKENS --- */
:root {
    /* Color Palette - Premium Dark Theme with Vibrant Accents */
    --bg-dark: #060913;
    --bg-card: rgba(16, 22, 38, 0.6);
    --bg-glass: rgba(18, 25, 43, 0.4);
    --border-glass: rgba(255, 255, 255, 0.08);
    
    --primary: #3b82f6; /* Blue */
    --primary-light: #60a5fa;
    --accent: #00f0ff; /* Cyan */
    --accent-purple: #8b5cf6;
    
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    
    /* Process Flow Variables */
    --flow-line: rgba(59, 130, 246, 0.3);
    --flow-line-active: #00f0ff;
    
    /* Typography */
    --font-heading: 'Inter', 'Noto Sans TC', sans-serif;
    --font-body: 'Inter', 'Noto Sans TC', sans-serif;
    
    /* Transitions & Shadows */
    --transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.15);
    --shadow-neo: inset 0 1px 1px rgba(255,255,255,0.05), 0 8px 32px rgba(0,0,0,0.4);
    
    /* Spacing */
    --section-pad: 80px 0;
}

/* --- RESET & BASIC STYLES --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px; 
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 85% 30%, rgba(139, 92, 246, 0.08) 0%, transparent 50%);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 2;
}

.section {
    padding: var(--section-pad);
    position: relative;
}

.section-header {
    margin-bottom: 40px; /* Reduced from 60px implicit or other */
}

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

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    line-height: 1.3;
    font-weight: 700;
}

/* --- UTILITIES --- */
.gradient-text {
    background: linear-gradient(135deg, var(--accent), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.highlight {
    position: relative;
    color: var(--accent);
}

.glass {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    box-shadow: var(--shadow-neo);
}

.hover-glow:hover {
    box-shadow: 0 0 30px rgba(0, 240, 255, 0.1);
    border-color: rgba(0, 240, 255, 0.3);
    transform: translateY(-5px);
}

/* --- BUTTONS --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 30px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent-purple));
    color: #fff;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    box-shadow: 0 6px 25px rgba(59, 130, 246, 0.6);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--text-main);
    border: 1px solid rgba(255,255,255,0.2);
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(0, 240, 255, 0.05);
}

.btn-lg { padding: 16px 36px; font-size: 1.125rem; }
.btn-xl { padding: 18px 48px; font-size: 1.25rem; }

/* --- GLOBAL BACKGROUND PROCESS LINE --- */
.flow-line-bg {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 40px;
    width: 2px;
    background: repeating-linear-gradient(to bottom, var(--flow-line) 0, var(--flow-line) 10px, transparent 10px, transparent 20px);
    z-index: 1;
    opacity: 0.3;
}

.flow-line-progress {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0%;
    background: var(--flow-line-active);
    box-shadow: 0 0 10px var(--flow-line-active);
    transition: height 0.1s ease-out;
}

/* --- NAVBAR --- */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(6, 9, 19, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-glass);
    z-index: 100;
    transition: all 0.3s;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
}

.header-logo {
    height: 48px;
    width: auto;
    object-fit: contain;
}

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

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    font-size: 0.95rem;
}

.nav-link:hover, .nav-link.active {
    color: var(--accent);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 1.8rem;
    cursor: pointer;
}

/* --- 1. HERO SECTION --- */
.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.node-bg {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    z-index: 0;
}
.node-1 {
    top: -10%; left: -10%; width: 500px; height: 500px;
    background: rgba(59, 130, 246, 0.15);
}
.node-2 {
    bottom: -10%; right: -10%; width: 600px; height: 600px;
    background: rgba(139, 92, 246, 0.15);
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 20px;
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid rgba(0, 240, 255, 0.2);
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-title {
    font-size: 4rem;
    margin-bottom: 20px;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: #fff;
    margin-bottom: 24px;
    font-weight: 400;
}

.hero-desc {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: 30px;
}

.hero-actions {
    display: flex;
    gap: 16px;
}

.hero-visual {
    position: relative;
    height: auto;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.4);
    border: 1px solid var(--border-glass);
}

.abstract-flowchart {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

.flow-start, .flow-end, .flow-gateway {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 2px solid var(--border-glass);
    color: var(--accent);
    font-size: 2rem;
    box-shadow: var(--shadow-glow);
    animation: pulseGlow 3s infinite alternate;
}

.flow-start, .flow-end {
    width: 60px; height: 60px;
    border-radius: 50%;
}
.flow-end { border-color: var(--accent-purple); color: var(--accent-purple); animation-delay: 1.5s; }

.flow-gateway {
    width: 60px; height: 60px;
    transform: rotate(45deg);
    border-radius: 4px;
    margin: 20px 0;
}
.flow-gateway i { transform: rotate(-45deg); }

.flow-task {
    padding: 16px 32px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    font-weight: 500;
    letter-spacing: 1px;
    backdrop-filter: blur(5px);
    position: relative;
    z-index: 2;
}

.main-task { margin: 20px 0; }

.flow-branch {
    position: absolute;
    top: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.branch-1 { left: 0; transform: translateY(-20px); }
.branch-2 { right: 0; transform: translateY(20px); }

.flow-arrow, .flow-arrow-down {
    width: 2px;
    height: 40px;
    background: var(--primary);
    position: relative;
}
.flow-arrow::after, .flow-arrow-down::after {
    content: '';
    position: absolute;
    bottom: -5px; left: -4px;
    border-width: 5px 5px 0;
    border-style: solid;
    border-color: var(--primary) transparent transparent transparent;
}

/* --- SECTION HEADERS --- */
.section-label {
    text-transform: uppercase;
    color: var(--primary-light);
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.section-title {
    font-size: 3rem;
    margin-bottom: 24px;
    color: #fff;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 40px; /* Reduced from 60px */
}

/* --- 2. TARGET SECTION --- */
.target-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.target-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    padding: 40px;
    border-radius: 20px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.target-card::before {
    content: ''; position: absolute; top: 0; left: 0; width: 4px; height: 100%;
    background: linear-gradient(to bottom, var(--primary), var(--accent));
    opacity: 0; transition: var(--transition);
}

.target-card:hover { transform: translateY(-5px); box-shadow: 0 10px 30px rgba(0,0,0,0.5); }
.target-card:hover::before { opacity: 1; }

.target-card-wide {
    grid-column: span 2;
    display: flex;
    align-items: center;
    gap: 30px;
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.7), rgba(15, 23, 42, 0.4));
    border: 1px solid rgba(0, 240, 255, 0.2);
}

.card-icon {
    width: 60px; height: 60px;
    border-radius: 12px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent);
    display: flex; justify-content: center; align-items: center;
    font-size: 2rem;
    margin-bottom: 24px;
}

.target-card h3 { font-size: 1.5rem; margin-bottom: 16px; color: #fff; }
.target-card p { color: var(--text-muted); }

.target-card-wide .card-icon { margin-bottom: 0; flex-shrink: 0; width: 80px; height: 80px; font-size: 2.5rem; }

/* --- 3. SYLLABUS SECTION --- */
.syllabus-layout {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: start;
}

.syllabus-info {
    position: sticky;
    top: 120px;
}

.syllabus-desc {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: 40px;
}

.info-card {
    display: flex;
    gap: 20px;
    padding: 30px;
}
.info-icon { font-size: 2.5rem; color: var(--accent-purple); }
.info-card h4 { margin-bottom: 8px; font-size: 1.25rem; }
.info-card p { color: var(--text-muted); font-size: 0.95rem; }

.syllabus-timeline {
    position: relative;
    padding-left: 40px;
}

.syllabus-timeline::before {
    content: ''; position: absolute; left: 11px; top: 0; bottom: 0; width: 2px;
    background: rgba(255,255,255,0.1);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
}

.timeline-marker {
    position: absolute;
    left: -40px; top: 20px;
    width: 24px; height: 24px;
    border-radius: 50%;
    background: var(--bg-dark);
    border: 4px solid var(--primary);
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.5);
    z-index: 2;
}

.end-marker {
    border-color: var(--accent);
    display: flex; justify-content: center; align-items: center;
    color: var(--accent); font-size: 12px;
}

.timeline-content {
    padding: 30px;
    border-radius: 16px;
    transition: var(--transition);
}

.topic-num {
    display: inline-block;
    color: var(--primary-light);
    font-weight: 700;
    font-size: 0.875rem;
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.timeline-content h3 { font-size: 1.5rem; margin-bottom: 12px; }
.timeline-content p { color: var(--text-muted); }

.highlight-card {
    background: linear-gradient(135deg, rgba(8, 145, 178, 0.1), rgba(139, 92, 246, 0.1));
    border-color: rgba(0, 240, 255, 0.3);
}
.highlight-card h3 { color: var(--accent); }

/* --- 4. FEATURES SECTION --- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    margin-bottom: 60px;
}

.feature-card {
    padding: 50px 40px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.feature-icon-wrapper {
    position: relative;
    width: 80px; height: 80px;
    margin-bottom: 30px;
    display: flex; justify-content: center; align-items: center;
}

.icon-bg {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, var(--primary), var(--accent-purple));
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    opacity: 0.1;
    animation: morphPattern 8s ease-in-out infinite alternate;
}

.feature-icon-wrapper i { font-size: 3rem; color: var(--accent); position: relative; z-index: 1; }
.feature-title { font-size: 1.5rem; margin-bottom: 20px; }
.feature-desc { color: var(--text-muted); }

.feature-deco-gateway {
    width: 80px; height: 80px;
    margin: 0 auto;
    border: 2px solid rgba(255,255,255,0.1);
    transform: rotate(45deg);
    display: flex; justify-content: center; align-items: center;
}
.feature-deco-gateway i { transform: rotate(-45deg); font-size: 2rem; color: rgba(255,255,255,0.2); }

/* CTA SECTION */
.cta-section { padding-top: 60px; }

.cta-container {
    padding: 40px 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(to right, rgba(15, 23, 42, 0.8), rgba(30, 58, 138, 0.4));
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 24px;
}

.cta-content h2 { font-size: 2.5rem; margin-bottom: 16px; color: #fff; }
.cta-content p { font-size: 1.2rem; color: var(--text-muted); }

/* --- FOOTER --- */
.footer {
    border-top: 1px solid var(--border-glass);
    padding: 60px 0 40px;
    margin-top: 60px;
    background: #02040a;
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-logo { display: flex; align-items: center; }
.footer-img { 
    height: 40px; 
    width: auto; 
}
.footer-copy { color: var(--text-muted); font-size: 0.9rem; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { color: var(--text-muted); text-decoration: none; font-size: 0.9rem; transition: var(--transition); }
.footer-links a:hover { color: #fff; }

/* --- 5 & 6. INFO & SCHEDULE SECTION --- */
.info-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}
.info-box {
    padding: 50px 40px;
    height: 100%;
    position: relative;
    overflow: hidden;
}
.info-list {
    list-style: none;
    margin-top: 30px;
}
.info-list li {
    display: flex;
    gap: 20px;
    margin-bottom: 24px;
    align-items: flex-start;
}
.info-list i {
    font-size: 2rem;
    color: var(--primary-light);
    margin-top: 4px;
}
.info-list strong {
    display: block;
    color: #fff;
    margin-bottom: 4px;
}
.info-list span {
    color: var(--text-muted);
}
.schedule-content {
    margin-top: 30px;
    position: relative;
    z-index: 1;
}
.bg-icon {
    position: absolute;
    right: -20px;
    bottom: -20px;
    font-size: 15rem;
    color: rgba(255,255,255,0.02);
    z-index: -1;
    transform: rotate(-15deg);
}
.highlight-text {
    font-size: 1.25rem;
    color: var(--accent);
    margin-bottom: 20px;
}
.schedule-chart {
    margin-top: 30px;
    display: flex;
    flex-direction: row;
    height: 60px;
    border-radius: 12px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-glass);
}
.chart-bar {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 15px;
    font-weight: 600;
    color: #fff;
    transition: var(--transition);
}
.chart-bar.lecture {
    flex: 3; /* 3 hours */
    background: linear-gradient(90deg, rgba(59, 130, 246, 0.4), var(--primary));
    border-right: 1px solid rgba(255, 255, 255, 0.1);
}
.chart-bar.practice {
    flex: 1; /* 1 hour */
    background: linear-gradient(90deg, var(--accent-purple), rgba(139, 92, 246, 0.6));
}
.chart-bar:hover {
    filter: brightness(1.2);
}

/* --- 7. SPEAKER SECTION --- */
.speaker-card {
    display: flex;
    align-items: center;
    gap: 50px;
    padding: 50px;
    max-width: 900px;
    margin: 0 auto;
}
.speaker-photo-wrapper {
    position: relative;
    width: 220px;
    height: 220px;
    flex-shrink: 0;
}
.speaker-photo {
    width: 100%;
    height: 100%;
    border-radius: 20px;
    object-fit: cover;
    position: relative;
    z-index: 2;
    border: 2px solid var(--border-glass);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}
.photo-frame {
    position: absolute;
    inset: -10px;
    border: 2px dashed var(--accent);
    border-radius: 24px;
    z-index: 1;
    animation: rotateFrame 20s linear infinite;
}
@keyframes rotateFrame {
    100% { transform: rotate(360deg); }
}
.speaker-name {
    font-size: 2.5rem;
    color: #fff;
    margin-bottom: 8px;
}
.speaker-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 24px;
}
.speaker-divider {
    width: 60px;
    height: 4px;
    background: var(--accent);
    border-radius: 2px;
    margin-bottom: 24px;
}
.speaker-desc {
    color: var(--text-muted);
    font-size: 1.05rem;
}

/* --- 8. PRICING SECTION --- */
.pricing-card {
    max-width: 600px;
    margin: 0 auto;
    padding: 50px;
    border-color: rgba(59, 130, 246, 0.3);
}
.price-header {
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
    margin-bottom: 40px;
}
.price-tag {
    display: flex;
    flex-direction: column;
    align-items: center;
}
.price-tag.early-bird {
    padding: 30px;
    background: rgba(0, 240, 255, 0.05);
    border: 1px solid var(--accent);
    border-radius: 20px;
    width: 100%;
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.1);
}
.price-tag.early-bird .price-label {
    color: var(--accent);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 10px;
}
.price-tag.early-bird .price-amount {
    font-size: 4rem;
    font-weight: 900;
    color: #fff;
    line-height: 1;
}
.price-tag.early-bird .price-currency {
    font-size: 2rem;
    vertical-align: top;
    color: var(--text-muted);
}
.price-tag.regular {
    color: var(--text-muted);
}
.price-strike {
    text-decoration: line-through;
    font-size: 1.5rem;
}
.price-footer {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    color: var(--primary-light);
    font-size: 1.125rem;
}

/* --- 9 & 10. CONTACT SECTION --- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}
.contact-box {
    padding: 50px 40px;
    text-align: center;
}
.text-xl { font-size: 1.5rem; color: #fff; margin-top: 15px;}
.box-icon i {
    font-size: 3rem;
    color: var(--accent-purple);
    margin-bottom: 10px;
}
.contact-list {
    list-style: none;
    text-align: left;
    display: inline-block;
    margin-top: 20px;
}
.contact-list li {
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
}
.contact-list a {
    color: var(--primary-light);
    text-decoration: none;
    transition: var(--transition);
}
.contact-list a:hover {
    color: var(--accent);
    text-decoration: underline;
}

/* --- 11. REGISTER (IFRAME) APP --- */
.iframe-container {
    padding: 2px;
    background: linear-gradient(135deg, var(--primary), var(--accent-purple));
    border-radius: 18px;
    margin: 40px auto;
    max-width: 1000px;
    overflow: hidden;
}
.iframe-container iframe {
    border-radius: 16px;
    display: block;
    background: #fff;
}
.fallback-cta {
    margin-top: 40px;
}
.fallback-cta p {
    color: var(--text-muted);
    margin-bottom: 15px;
}

/* --- ANIMATIONS --- */
@keyframes pulseGlow {
    0% { box-shadow: 0 0 10px rgba(0, 240, 255, 0.1); }
    100% { box-shadow: 0 0 30px rgba(0, 240, 255, 0.4); }
}

@keyframes morphPattern {
    0% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; transform: rotate(0deg); }
    100% { border-radius: 70% 30% 30% 70% / 70% 70% 30% 30%; transform: rotate(360deg); }
}

/* Visibility classes for JS scroll */
.fade-up { opacity: 0; transform: translateY(40px); transition: all 0.8s ease-out; }
.fade-left { opacity: 0; transform: translateX(40px); transition: all 0.8s ease-out; }
.fade-in { opacity: 0; transition: all 1s ease-out; }

.fade-up.visible, .fade-left.visible, .fade-in.visible { opacity: 1; transform: translate(0); }

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* --- RESPONSIVE --- */
@media (max-width: 1024px) {
    .hero-title { font-size: 3rem; }
    .hero-container { grid-template-columns: 1fr; text-align: center; }
    .hero-content { margin: 0 auto; }
    .hero-actions { justify-content: center; }
    .hero-visual { display: none; }
    
    .syllabus-layout { grid-template-columns: 1fr; }
    .syllabus-info { position: relative; top: 0; margin-bottom: 60px; text-align: center; }
    .info-card { text-align: left; }
    
    .info-wrapper, .contact-grid { grid-template-columns: 1fr; }
    .speaker-card { flex-direction: column; text-align: center; }
    .speaker-divider { margin: 0 auto 24px; }
    
    .cta-container { flex-direction: column; text-align: center; gap: 40px; }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed; top: 80px; left: 0; width: 100%;
        background: rgba(6, 9, 19, 0.95); backdrop-filter: blur(10px);
        flex-direction: column; padding: 40px 0; gap: 30px;
        transform: translateY(-100%); opacity: 0; pointer-events: none; transition: var(--transition);
        border-bottom: 1px solid var(--border-glass);
    }
    .nav-links.active { transform: translateY(0); opacity: 1; pointer-events: auto; }
    .menu-toggle { display: block; }
    
    .target-grid, .features-grid { grid-template-columns: 1fr; }
    .target-card-wide { grid-column: 1; flex-direction: column; text-align: center; }
    
    .price-tag.early-bird .price-amount { font-size: 3rem; }
    .chart-bar.lecture, .chart-bar.practice { width: 100%; margin-bottom: 10px;}
    
    .section { padding: 80px 0; }
    .flow-line-bg { left: 20px; }
}