/* ===================================================
   김하늘.dev — Personal Brand CSS
   =================================================== */

/* 1. RESET & BASE */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0D0D0D;
  --bg-2:      #111111;
  --bg-card:   #161616;
  --bg-card-2: #1A1A1A;
  --border:    rgba(255,255,255,0.07);
  --border-hover: rgba(255,107,53,0.4);

  --orange:  #FF6B35;
  --pink:    #F72585;
  --grad:    linear-gradient(135deg, #FF6B35 0%, #F72585 100%);
  --grad-t:  linear-gradient(135deg, rgba(255,107,53,0.15) 0%, rgba(247,37,133,0.15) 100%);

  --text-1:  #FFFFFF;
  --text-2:  #A0A0A0;
  --text-3:  #606060;

  --nav-h:   72px;
  --radius:  16px;
  --radius-sm: 10px;

  --trans: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --trans-fast: 0.15s ease;
}

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

body {
  background: var(--bg);
  color: var(--text-1);
  font-family: 'Inter', 'Noto Sans KR', sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; }

/* 2. UTILITIES */
.container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: 24px;
}

.gradient-text {
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 100px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--trans);
  white-space: nowrap;
}
.btn-gradient {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 0 24px rgba(255,107,53,0.3);
}
.btn-gradient:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(255,107,53,0.5);
}
.btn-outline {
  border: 1.5px solid var(--border-hover);
  color: var(--text-1);
  background: transparent;
}
.btn-outline:hover {
  background: var(--grad-t);
  border-color: var(--orange);
  transform: translateY(-2px);
}
.btn-lg { padding: 14px 32px; font-size: 1rem; }
.btn-full { width: 100%; justify-content: center; }

/* Section Layout */
.section { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 56px; }
.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 12px;
  padding: 4px 14px;
  background: rgba(255,107,53,0.12);
  border-radius: 100px;
  border: 1px solid rgba(255,107,53,0.2);
}
.section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.2;
}
.section-cta { text-align: center; margin-top: 48px; }

/* AOS — scroll reveal */
[data-aos] {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
[data-aos].aos-visible {
  opacity: 1;
  transform: translateY(0);
}
[data-aos][data-aos-delay="150"] { transition-delay: 0.15s; }
[data-aos][data-aos-delay="200"] { transition-delay: 0.2s; }
[data-aos][data-aos-delay="300"] { transition-delay: 0.3s; }

/* 3. NAVIGATION */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  transition: background var(--trans), box-shadow var(--trans);
}
.nav.scrolled {
  background: rgba(13,13,13,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 40px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 36px; height: 36px;
  background: var(--grad);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 900; font-size: 1.1rem;
  color: #fff;
}
.logo-text {
  font-weight: 800; font-size: 1.1rem;
}
.logo-dot { color: var(--orange); }
.nav-menu {
  display: flex;
  gap: 32px;
  margin-left: auto;
}
.nav-link {
  color: var(--text-2);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--trans-fast);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 0; bottom: -4px;
  width: 0; height: 2px;
  background: var(--grad);
  border-radius: 2px;
  transition: width var(--trans);
}
.nav-link:hover { color: var(--text-1); }
.nav-link:hover::after { width: 100%; }
.nav-cta { margin-left: 16px; padding: 10px 20px; }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  margin-left: auto;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text-1);
  border-radius: 2px;
  transition: var(--trans);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 4. HERO */
.hero {
  min-height: 100svh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--nav-h);
}
.hero-bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}
.hero-glow {
  position: absolute;
  width: 600px; height: 600px;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  opacity: 0.15;
}
.hero-glow--left  { background: var(--orange); top: -200px; left: -200px; }
.hero-glow--right { background: var(--pink);   bottom: -200px; right: -200px; }

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding-top: 40px;
  padding-bottom: 80px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,107,53,0.1);
  border: 1px solid rgba(255,107,53,0.25);
  border-radius: 100px;
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--orange);
  margin-bottom: 20px;
}
.badge-dot {
  width: 8px; height: 8px;
  background: var(--orange);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}
.hero-title {
  font-size: clamp(2.8rem, 5vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.hero-desc {
  color: var(--text-2);
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 32px;
}
.hero-desc strong { color: var(--text-1); }
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.hero-stats {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 0;
  margin-bottom: 32px;
  overflow: hidden;
}
.stat-item {
  flex: 1;
  text-align: center;
  padding: 0 20px;
}
.stat-number {
  display: block;
  font-size: 1.8rem;
  font-weight: 900;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 4px;
}
.stat-label { font-size: 0.8rem; color: var(--text-2); }
.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
  flex-shrink: 0;
}
.hero-socials {
  display: flex;
  gap: 12px;
}
.social-link {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text-2);
  transition: var(--trans);
}
.social-link svg { width: 18px; height: 18px; }
.social-link:hover {
  background: var(--grad);
  border-color: transparent;
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(255,107,53,0.4);
}

/* Hero Image */
.hero-image-wrap {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-image-ring {
  position: absolute;
  width: 440px; height: 440px;
  border-radius: 50%;
  border: 1px solid rgba(255,107,53,0.15);
  animation: spin 20s linear infinite;
}
.hero-image-ring--2 {
  width: 520px; height: 520px;
  border-color: rgba(247,37,133,0.1);
  animation-duration: 30s;
  animation-direction: reverse;
}
@keyframes spin { to { transform: rotate(360deg); } }
.hero-image {
  width: 380px;
  height: 480px;
  object-fit: cover;
  border-radius: 28px;
  position: relative;
  z-index: 1;
  box-shadow: 0 32px 80px rgba(0,0,0,0.6), 0 0 0 1px var(--border);
}
.hero-image-badge {
  position: absolute;
  bottom: 24px;
  left: 0;
  background: rgba(13,13,13,0.9);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 10px 18px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  z-index: 2;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

/* Scroll hint */
.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-3);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.scroll-line {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--text-3), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine {
  0%, 100% { opacity: 1; transform: scaleY(1); }
  50% { opacity: 0.3; transform: scaleY(0.5); }
}

/* 5. ABOUT */
.about { background: var(--bg-2); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.about-lead {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 16px;
}
.about-text p {
  color: var(--text-2);
  margin-bottom: 16px;
  line-height: 1.8;
}
.about-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}
.skill-tag {
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-2);
  transition: var(--trans);
}
.skill-tag:hover {
  border-color: var(--orange);
  color: var(--orange);
  background: rgba(255,107,53,0.08);
}

/* Timeline */
.timeline-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 28px;
}
.timeline { position: relative; }
.timeline::before {
  content: '';
  position: absolute;
  left: 9px; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--orange), var(--pink), transparent);
}
.timeline-item {
  display: flex;
  gap: 20px;
  padding-bottom: 28px;
  position: relative;
}
.timeline-dot {
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--grad);
  flex-shrink: 0;
  box-shadow: 0 0 0 4px rgba(255,107,53,0.15);
  position: relative;
  z-index: 1;
  margin-top: 2px;
}
.timeline-content { flex: 1; }
.timeline-year {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--orange);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 4px;
}
.timeline-content h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 4px;
}
.timeline-content p {
  font-size: 0.85rem;
  color: var(--text-2);
}

/* 6. YOUTUBE */
.youtube { background: var(--bg); }
.yt-tabs {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.yt-tab {
  padding: 8px 22px;
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-2);
  border: 1.5px solid var(--border);
  background: transparent;
  transition: var(--trans);
}
.yt-tab:hover { color: var(--text-1); border-color: rgba(255,255,255,0.2); }
.yt-tab.active {
  background: var(--grad);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 4px 16px rgba(255,107,53,0.3);
}
.yt-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.yt-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: var(--trans);
}
.yt-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: 0 20px 48px rgba(0,0,0,0.4);
}
.yt-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.yt-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.yt-card:hover .yt-thumb img { transform: scale(1.05); }
.yt-play-btn {
  position: absolute;
  inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,0.3);
  transition: var(--trans);
}
.yt-play-btn svg { width: 52px; height: 52px; filter: drop-shadow(0 4px 12px rgba(0,0,0,0.5)); }
.yt-card:hover .yt-play-btn { background: rgba(0,0,0,0.5); }
.yt-duration {
  position: absolute;
  bottom: 8px; right: 8px;
  background: rgba(0,0,0,0.8);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
}
.yt-cat-badge {
  position: absolute;
  top: 10px; left: 10px;
  background: var(--grad);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.yt-info { padding: 16px; }
.yt-info h3 {
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 10px;
  color: var(--text-1);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.yt-meta {
  display: flex;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-3);
}
.yt-meta span { display: flex; align-items: center; gap: 4px; }

/* 7. COURSES */
.courses { background: var(--bg-2); }
.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.course-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--trans);
  position: relative;
}
.course-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: 0 24px 56px rgba(0,0,0,0.4);
}
.course-card--featured {
  border-color: rgba(255,107,53,0.4);
}
.course-badge {
  position: absolute;
  top: 16px; right: 16px;
  background: var(--grad);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 100px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.course-thumb {
  aspect-ratio: 16/9;
  overflow: hidden;
}
.course-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.course-card:hover .course-thumb img { transform: scale(1.05); }
.course-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.course-title {
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 10px;
  line-height: 1.3;
}
.course-desc {
  font-size: 0.87rem;
  color: var(--text-2);
  line-height: 1.6;
  margin-bottom: 16px;
  flex: 1;
}
.course-stats {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
  font-size: 0.82rem;
  color: var(--text-2);
}
.course-stat { display: flex; align-items: center; gap: 5px; }
.course-stars { color: #FFB800; letter-spacing: -2px; }
.course-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  gap: 12px;
}
.course-price {
  font-size: 1.3rem;
  font-weight: 900;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.course-price-old {
  font-size: 0.82rem;
  color: var(--text-3);
  text-decoration: line-through;
  display: block;
}
.btn-enroll {
  padding: 10px 20px;
  font-size: 0.88rem;
  border-radius: 100px;
  background: var(--grad);
  color: #fff;
  font-weight: 700;
  transition: var(--trans);
  flex-shrink: 0;
}
.btn-enroll:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,107,53,0.4);
}

/* 8. BLOG */
.blog { background: var(--bg); }
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: var(--trans);
}
.blog-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-hover);
  box-shadow: 0 20px 48px rgba(0,0,0,0.35);
}
.blog-thumb {
  aspect-ratio: 16/10;
  overflow: hidden;
}
.blog-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.blog-card:hover .blog-thumb img { transform: scale(1.05); }
.blog-body { padding: 20px; }
.blog-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--orange);
  margin-bottom: 10px;
  padding: 2px 10px;
  background: rgba(255,107,53,0.1);
  border-radius: 100px;
}
.blog-title {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 10px;
  color: var(--text-1);
}
.blog-excerpt {
  font-size: 0.85rem;
  color: var(--text-2);
  line-height: 1.6;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.blog-meta {
  display: flex;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--text-3);
  align-items: center;
}
.blog-dot { width: 3px; height: 3px; background: var(--text-3); border-radius: 50%; }

/* 9. CONTACT */
.contact { background: var(--bg-2); }
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 64px;
  align-items: start;
}
.contact-info .section-tag { margin-bottom: 16px; }
.contact-info .section-title { text-align: left; margin-bottom: 20px; font-size: clamp(1.8rem, 3vw, 2.4rem); }
.contact-desc { color: var(--text-2); line-height: 1.7; margin-bottom: 32px; }
.contact-details { display: flex; flex-direction: column; gap: 12px; }
.contact-detail-item {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-2);
  font-size: 0.95rem;
}
.contact-detail-item svg { color: var(--orange); flex-shrink: 0; }

/* Forms */
.contact-form, #enrollForm {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-1);
}
.required { color: var(--pink); }
.form-group input,
.form-group textarea,
.form-group select {
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text-1);
  font-size: 0.95rem;
  transition: border-color var(--trans-fast), box-shadow var(--trans-fast);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23606060' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--orange);
  box-shadow: 0 0 0 3px rgba(255,107,53,0.15);
}
.form-group input.error,
.form-group textarea.error,
.form-group select.error {
  border-color: var(--pink);
  box-shadow: 0 0 0 3px rgba(247,37,133,0.1);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-3); }
.form-group textarea { resize: vertical; min-height: 120px; }
.field-error { font-size: 0.8rem; color: var(--pink); min-height: 1em; }

/* Payment options */
.payment-options { display: flex; gap: 10px; flex-wrap: wrap; }
.payment-option { cursor: pointer; }
.payment-option input[type="radio"] { display: none; }
.payment-label {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-2);
  transition: var(--trans);
  cursor: pointer;
}
.payment-option input:checked + .payment-label {
  border-color: var(--orange);
  color: var(--text-1);
  background: rgba(255,107,53,0.08);
}
.payment-label:hover { border-color: rgba(255,255,255,0.2); color: var(--text-1); }

/* 10. FOOTER */
.footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding-top: 48px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 48px;
  align-items: center;
  padding-bottom: 32px;
}
.footer-brand p {
  color: var(--text-3);
  font-size: 0.85rem;
  margin-top: 10px;
}
.footer-links {
  display: flex;
  gap: 24px;
}
.footer-links a {
  font-size: 0.88rem;
  color: var(--text-2);
  transition: color var(--trans-fast);
}
.footer-links a:hover { color: var(--orange); }
.footer-socials { display: flex; gap: 10px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 16px 24px;
  text-align: center;
}
.footer-bottom p {
  font-size: 0.8rem;
  color: var(--text-3);
}
.footer-bottom a { color: var(--text-2); transition: color var(--trans-fast); }
.footer-bottom a:hover { color: var(--orange); }

/* 11. MODALS */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--trans);
}
.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}
.modal {
  background: var(--bg-card-2);
  border: 1px solid var(--border);
  border-radius: 20px;
  position: relative;
  transform: scale(0.95) translateY(20px);
  transition: transform var(--trans);
  max-height: 90vh;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.modal-overlay.open .modal { transform: scale(1) translateY(0); }
.modal--video { width: 100%; max-width: 800px; padding: 20px; }
.modal--enroll { width: 100%; max-width: 520px; padding: 32px; }
.modal-close {
  position: absolute;
  top: 16px; right: 16px;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 1.3rem;
  display: flex; align-items: center; justify-content: center;
  transition: var(--trans);
  z-index: 1;
  line-height: 1;
}
.modal-close:hover {
  background: var(--pink);
  color: #fff;
  border-color: var(--pink);
}
.modal-header { margin-bottom: 24px; padding-right: 40px; }
.modal-header h3 { font-size: 1.3rem; font-weight: 800; margin-bottom: 6px; }
.modal-course-title { font-size: 0.9rem; color: var(--orange); font-weight: 600; }
.modal-video-wrap { border-radius: 12px; overflow: hidden; }
.video-placeholder {
  aspect-ratio: 16/9;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  border-radius: 12px;
  border: 1px dashed var(--border);
}
.video-placeholder p { font-size: 1.1rem; font-weight: 700; color: var(--text-1); }
.video-placeholder span { font-size: 0.82rem; color: var(--text-3); }

/* 12. TOAST */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(120px);
  background: #1A1A1A;
  border: 1px solid rgba(255,107,53,0.3);
  border-radius: 100px;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-1);
  z-index: 3000;
  box-shadow: 0 16px 48px rgba(0,0,0,0.5);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.4s ease;
  opacity: 0;
  white-space: nowrap;
}
.toast svg { color: #4ADE80; flex-shrink: 0; }
.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* 13. CARD HIDDEN (filter) */
.yt-card.hidden { display: none; }

/* 14. RESPONSIVE */
@media (max-width: 1024px) {
  .yt-grid, .courses-grid, .blog-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; gap: 40px; }
  .hero-image-wrap { order: -1; }
  .hero-image { width: 280px; height: 340px; }
  .hero-image-ring { width: 320px; height: 320px; }
  .hero-image-ring--2 { width: 380px; height: 380px; }
  .hero-actions { justify-content: center; }
  .hero-stats { max-width: 480px; margin-inline: auto; }
  .hero-socials { justify-content: center; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-inner { grid-template-columns: 1fr; gap: 40px; }
  .footer-inner { grid-template-columns: 1fr; text-align: center; gap: 24px; }
  .footer-links { justify-content: center; }
  .footer-socials { justify-content: center; }
}

@media (max-width: 768px) {
  .nav-menu, .nav-cta { display: none; }
  .hamburger { display: flex; }
  .nav-menu.mobile-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(13,13,13,0.97);
    backdrop-filter: blur(20px);
    padding: 24px;
    gap: 8px;
    border-bottom: 1px solid var(--border);
    z-index: 999;
  }
  .nav-menu.mobile-open .nav-link {
    display: block;
    padding: 12px;
    font-size: 1.1rem;
    border-radius: var(--radius-sm);
  }
  .nav-menu.mobile-open .nav-link:hover { background: var(--bg-card); color: var(--text-1); }
  .section { padding: 72px 0; }
  .yt-grid, .courses-grid, .blog-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .hero-image-badge { left: 50%; transform: translateX(-50%); }
}

@media (max-width: 480px) {
  .container { padding-inline: 16px; }
  .hero-title { font-size: 2.4rem; }
  .hero-stats { flex-direction: column; padding: 16px; gap: 16px; }
  .stat-divider { width: 80%; height: 1px; margin-inline: auto; }
  .hero-image { width: 240px; height: 300px; }
  .hero-image-ring { width: 270px; height: 270px; }
  .hero-image-ring--2 { width: 320px; height: 320px; }
  .contact-form, #enrollForm { padding: 20px; }
  .payment-options { flex-direction: column; }
  .toast { left: 16px; right: 16px; transform: translateX(0) translateY(120px); white-space: normal; border-radius: 16px; }
  .toast.show { transform: translateX(0) translateY(0); }
}