/* ============================================
   ByteEdu 2026 — Dark Theme Design System
   Aesthetic: Deep space / editorial / premium
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Clash+Display:wght@400;500;600;700&family=Cabinet+Grotesk:wght@300;400;500;700;800&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&display=swap');

/* ── Design Tokens ── */
:root {
  /* Core palette */
  --bg-base:        #080c10;
  --bg-1:           #0d1117;
  --bg-2:           #111820;
  --bg-3:           #182030;
  --bg-card:        #0f1620;
  --bg-card-hover:  #141e2e;

  /* Teal accent system */
  --teal:           #2dd4bf;
  --teal-bright:    #5eead4;
  --teal-dim:       #14b8a6;
  --teal-glow:      rgba(45, 212, 191, 0.18);
  --teal-glow-lg:   rgba(45, 212, 191, 0.08);

  /* Cyan secondary */
  --cyan:           #22d3ee;
  --cyan-dim:       #0891b2;

  /* Text */
  --text:           #f0f6fc;
  --text-2:         #c9d4e0;
  --text-3:         #7a8fa6;
  --text-4:         #4a5d70;

  /* Borders */
  --border:         rgba(255,255,255,0.07);
  --border-bright:  rgba(45,212,191,0.25);
  --border-glow:    rgba(45,212,191,0.5);

  /* Semantic */
  --green:          #4ade80;
  --orange:         #fb923c;
  --red:            #f87171;
  --blue:           #60a5fa;

  /* Effects */
  --shadow-teal:    0 0 40px rgba(45,212,191,0.15);
  --shadow-card:    0 4px 24px rgba(0,0,0,0.4);
  --shadow-card-hover: 0 12px 48px rgba(0,0,0,0.6);

  /* Radius */
  --r-sm:  8px;
  --r-md:  14px;
  --r-lg:  20px;
  --r-xl:  28px;
  --r-2xl: 40px;

  /* Type */
  --font-display: 'Clash Display', sans-serif;
  --font-body:    'Cabinet Grotesk', sans-serif;
  --font-serif:   'Instrument Serif', serif;

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --nav-h: 70px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg-base);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; font-family: var(--font-body); border: none; background: none; }
input, textarea, select { font-family: var(--font-body); }
img { max-width: 100%; display: block; }

/* ── Noise texture overlay ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
}

/* ── Layout ── */
.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 28px;
}
section { padding: 96px 0; position: relative; }

/* ── Typography ── */
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.1; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.73rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--teal);
  background: rgba(45,212,191,0.08);
  border: 1px solid var(--border-bright);
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 20px;
}

.eyebrow .dot {
  width: 6px; height: 6px;
  background: var(--teal);
  border-radius: 50%;
  animation: blink 2.5s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.display-title {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.display-title .accent {
  color: var(--teal);
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
}

.display-title .line-break { display: block; }

.body-lg {
  font-size: 1.08rem;
  color: var(--text-3);
  line-height: 1.75;
  max-width: 560px;
  font-weight: 400;
}

.text-center { text-align: center; }
.text-center .body-lg { margin: 0 auto; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--r-2xl);
  font-size: 0.9rem;
  font-weight: 700;
  transition: all 0.25s var(--ease);
  white-space: nowrap;
  position: relative;
}

.btn-primary {
  background: var(--teal);
  color: #080c10;
  box-shadow: 0 0 0 0 var(--teal-glow);
}
.btn-primary:hover {
  background: var(--teal-bright);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(45,212,191,0.35);
}

.btn-ghost {
  background: rgba(255,255,255,0.04);
  color: var(--text-2);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.08);
  border-color: var(--border-bright);
  color: var(--teal);
  transform: translateY(-2px);
}

.btn-teal-outline {
  background: transparent;
  color: var(--teal);
  border: 1px solid var(--border-bright);
}
.btn-teal-outline:hover {
  background: var(--teal-glow);
  transform: translateY(-2px);
}

.btn-lg { padding: 15px 32px; font-size: 0.97rem; }
.btn-sm { padding: 9px 18px; font-size: 0.8rem; }

/* ── Navigation ── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 1000;
  transition: all 0.3s var(--ease);
}

.navbar::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(8, 12, 16, 0.7);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s var(--ease);
}

.navbar.scrolled::before {
  background: rgba(8, 12, 16, 0.92);
  border-bottom-color: rgba(45,212,191,0.15);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
  position: relative;
  z-index: 1;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-mark {
  width: 34px; height: 34px;
  background: linear-gradient(135deg, var(--teal), var(--cyan));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  box-shadow: 0 0 16px rgba(45,212,191,0.3);
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}
.logo-text span { color: var(--teal); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-links a {
  padding: 8px 14px;
  border-radius: var(--r-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-3);
  transition: all 0.2s var(--ease);
}
.nav-links a:hover, .nav-links a.active {
  color: var(--teal);
  background: rgba(45,212,191,0.08);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
}
.hamburger span {
  display: block;
  width: 20px; height: 1.5px;
  background: var(--text-2);
  border-radius: 2px;
  transition: all 0.3s var(--ease);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: rgba(8,12,16,0.97);
  backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  padding: 20px 28px;
  z-index: 999;
  flex-direction: column;
  gap: 4px;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  padding: 12px 16px;
  border-radius: var(--r-sm);
  font-weight: 500;
  color: var(--text-3);
  transition: all 0.2s;
}
.mobile-nav a:hover { color: var(--teal); background: rgba(45,212,191,0.08); }
.mobile-nav .btn { margin-top: 8px; justify-content: center; }

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  position: relative;
  overflow: hidden;
}

/* Animated grid background */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(45,212,191,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45,212,191,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}

/* Radial glow orbs */
.hero-orb-1 {
  position: absolute;
  top: 15%; right: 5%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(45,212,191,0.12) 0%, transparent 65%);
  pointer-events: none;
  animation: orb-drift 12s ease-in-out infinite alternate;
}

.hero-orb-2 {
  position: absolute;
  bottom: 0; left: -10%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(34,211,238,0.08) 0%, transparent 65%);
  pointer-events: none;
  animation: orb-drift 16s ease-in-out infinite alternate-reverse;
}

@keyframes orb-drift {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(30px, -20px) scale(1.08); }
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-content {}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--teal);
  background: rgba(45,212,191,0.07);
  border: 1px solid rgba(45,212,191,0.2);
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 28px;
  animation: fadeUp 0.6s var(--ease) both;
}

.hero-h1 {
  font-size: clamp(2.6rem, 5.5vw, 4.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 24px;
  animation: fadeUp 0.7s var(--ease) 0.1s both;
}

.hero-h1 em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--teal);
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-3);
  line-height: 1.75;
  margin-bottom: 36px;
  max-width: 480px;
  font-weight: 400;
  animation: fadeUp 0.7s var(--ease) 0.2s both;
}

.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  animation: fadeUp 0.7s var(--ease) 0.3s both;
}

.hero-proof {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 44px;
  animation: fadeUp 0.7s var(--ease) 0.4s both;
}

.avatar-stack {
  display: flex;
}
.avatar-stack span {
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 2px solid var(--bg-base);
  margin-left: -10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
}
.avatar-stack span:first-child { margin-left: 0; }

.proof-text {
  font-size: 0.82rem;
  color: var(--text-3);
  font-weight: 400;
}
.proof-text strong { color: var(--text-2); font-weight: 600; }

/* Hero Visual — Dashboard */
.hero-visual {
  position: relative;
  animation: fadeRight 0.9s var(--ease) 0.2s both;
}

.dashboard-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255,255,255,0.06);
  position: relative;
}

.dashboard-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--teal-dim), transparent);
  opacity: 0.6;
}

.dash-topbar {
  background: rgba(255,255,255,0.02);
  border-bottom: 1px solid var(--border);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.dash-dots { display: flex; gap: 5px; }
.dash-dots span {
  width: 9px; height: 9px;
  border-radius: 50%;
}
.dash-dots span:nth-child(1) { background: #ff5f56; }
.dash-dots span:nth-child(2) { background: #ffbd2e; }
.dash-dots span:nth-child(3) { background: #27c93f; }
.dash-url {
  flex: 1;
  background: rgba(255,255,255,0.05);
  border-radius: 6px;
  padding: 5px 12px;
  font-size: 0.73rem;
  color: var(--text-4);
  font-family: monospace;
}

.dash-body { padding: 20px; }

.dash-greeting {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--text-2);
}

.dash-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}

.dash-stat {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 12px;
}
.dash-stat-val {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--teal);
}
.dash-stat-label {
  font-size: 0.68rem;
  color: var(--text-4);
  margin-top: 2px;
  font-weight: 500;
}

.dash-section-title {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-4);
  margin-bottom: 10px;
}

.dash-courses { display: flex; flex-direction: column; gap: 8px; }

.dash-course-row {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 10px 12px;
  transition: all 0.2s;
}

.dash-course-row.active-course {
  border-color: rgba(45,212,191,0.3);
  background: rgba(45,212,191,0.04);
}

.dash-course-icon {
  width: 30px; height: 30px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.dash-course-info { flex: 1; min-width: 0; }
.dash-course-name {
  font-weight: 600;
  font-size: 0.78rem;
  color: var(--text-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.dash-mini-bar {
  height: 3px;
  background: var(--border);
  border-radius: 2px;
  margin-top: 4px;
  overflow: hidden;
}
.dash-mini-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--teal), var(--cyan));
  border-radius: 2px;
  transition: width 1.5s var(--ease);
}

.dash-badge {
  font-size: 0.65rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 100px;
  flex-shrink: 0;
}
.badge-live { background: rgba(74,222,128,0.15); color: var(--green); border: 1px solid rgba(74,222,128,0.2); }
.badge-prog { background: rgba(251,146,60,0.12); color: var(--orange); border: 1px solid rgba(251,146,60,0.2); }
.badge-done { background: rgba(45,212,191,0.12); color: var(--teal); border: 1px solid rgba(45,212,191,0.2); }

/* Floating chips */
.float-chip {
  position: absolute;
  background: var(--bg-2);
  border: 1px solid var(--border-bright);
  border-radius: var(--r-lg);
  padding: 10px 14px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-2);
  display: flex;
  align-items: center;
  gap: 7px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  backdrop-filter: blur(8px);
  z-index: 10;
  animation: floatBob 5s ease-in-out infinite;
}
.float-chip:nth-child(2) { animation-delay: -2.5s; }
.float-chip .chip-icon { font-size: 1rem; }

.float-chip-1 { top: -18px; left: -20px; }
.float-chip-2 { bottom: 20px; right: -20px; }

@keyframes floatBob {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
}

/* Animations */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeRight {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ── Section Divider ── */
.divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-bright), transparent);
  opacity: 0.5;
}

/* ── Marquee / Ticker ── */
.ticker-section {
  padding: 0;
  overflow: hidden;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: rgba(45,212,191,0.02);
}
.ticker-wrap {
  display: flex;
  gap: 0;
  mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
}
.ticker-track {
  display: flex;
  gap: 0;
  animation: ticker 28s linear infinite;
  white-space: nowrap;
}
.ticker-track:nth-child(2) { animation-direction: reverse; }
.ticker-item {
  padding: 14px 32px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-4);
  letter-spacing: 0.05em;
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.ticker-item span.sep {
  color: var(--teal);
  opacity: 0.4;
}
@keyframes ticker {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ── Features ── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  overflow: hidden;
  margin-top: 56px;
}

.feat-card {
  background: var(--bg-1);
  padding: 36px 32px;
  position: relative;
  transition: all 0.3s var(--ease);
  overflow: hidden;
}

.feat-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 80% at 50% 0%, rgba(45,212,191,0.07), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.feat-card:hover { background: var(--bg-card-hover); }
.feat-card:hover::before { opacity: 1; }

.feat-number {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-4);
  letter-spacing: 0.15em;
  margin-bottom: 20px;
}

.feat-icon {
  font-size: 1.8rem;
  margin-bottom: 16px;
  display: block;
}

.feat-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.feat-desc {
  font-size: 0.875rem;
  color: var(--text-3);
  line-height: 1.65;
  font-weight: 400;
}

/* ── Courses ── */
.courses-section { background: var(--bg-1); }

.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 56px;
}

.course-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: all 0.3s var(--ease);
  display: flex;
  flex-direction: column;
  position: relative;
}

.course-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--r-lg);
  border: 1px solid transparent;
  transition: border-color 0.3s;
  pointer-events: none;
}

.course-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.course-card:hover::after { border-color: var(--border-bright); }

.cc-banner {
  padding: 28px 24px 20px;
  position: relative;
  overflow: hidden;
}

.cc-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.6;
}

.cc-b1 { background: linear-gradient(135deg, #0d2030 0%, #0a1820 100%); }
.cc-b2 { background: linear-gradient(135deg, #102020 0%, #0a1818 100%); }
.cc-b3 { background: linear-gradient(135deg, #0d1a28 0%, #0a1420 100%); }
.cc-b4 { background: linear-gradient(135deg, #12100a 0%, #0f0e08 100%); }
.cc-b5 { background: linear-gradient(135deg, #100818 0%, #0a0610 100%); }
.cc-b6 { background: linear-gradient(135deg, #08100d 0%, #060d0a 100%); }

.cc-emoji {
  font-size: 2.2rem;
  display: block;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.cc-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  position: relative;
  z-index: 1;
  letter-spacing: -0.01em;
}

.cc-sub {
  font-size: 0.75rem;
  color: var(--text-4);
  margin-top: 4px;
  position: relative;
  z-index: 1;
}

.cc-body {
  padding: 18px 22px 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.cc-desc {
  font-size: 0.86rem;
  color: var(--text-3);
  line-height: 1.65;
  margin-bottom: 16px;
  flex: 1;
  font-weight: 400;
}

.cc-meta {
  display: flex;
  gap: 12px;
  margin-bottom: 18px;
}

.cc-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 100px;
  border: 1px solid var(--border);
  color: var(--text-3);
}

.diff-b { border-color: rgba(74,222,128,0.2); color: var(--green); background: rgba(74,222,128,0.06); }
.diff-m { border-color: rgba(251,146,60,0.2); color: var(--orange); background: rgba(251,146,60,0.06); }
.diff-a { border-color: rgba(248,113,113,0.2); color: var(--red); background: rgba(248,113,113,0.06); }

.course-card .btn { width: 100%; justify-content: center; }

/* ── Process / Steps ── */
.process-section { background: var(--bg-base); }

.steps-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 56px;
  position: relative;
}

.steps-row::before {
  content: '';
  position: absolute;
  top: 36px;
  left: 12.5%;
  right: 12.5%;
  height: 1px;
  background: linear-gradient(90deg, var(--teal), var(--cyan), var(--teal));
  opacity: 0.2;
}

.step-item {
  padding: 0 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  z-index: 1;
}

.step-circle {
  width: 72px; height: 72px;
  border-radius: 50%;
  background: var(--bg-2);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--teal);
  margin-bottom: 22px;
  position: relative;
  transition: all 0.3s;
}

.step-circle::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--teal), var(--cyan));
  z-index: -1;
  opacity: 0;
  transition: opacity 0.3s;
}

.step-item:hover .step-circle { background: rgba(45,212,191,0.08); border-color: var(--teal); }
.step-item:hover .step-circle::before { opacity: 0.3; }

.step-h {
  font-size: 0.97rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.step-p {
  font-size: 0.83rem;
  color: var(--text-3);
  line-height: 1.65;
}

/* ── Platform Preview ── */
.preview-section { background: var(--bg-1); }

.preview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}

.preview-bullets { margin-top: 32px; display: flex; flex-direction: column; gap: 18px; }

.preview-bullet {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.pb-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: rgba(45,212,191,0.08);
  border: 1px solid var(--border-bright);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.pb-text h4 { font-size: 0.9rem; font-weight: 700; margin-bottom: 4px; color: var(--text-2); }
.pb-text p { font-size: 0.83rem; color: var(--text-3); line-height: 1.6; }

/* Course player mockup */
.player-mockup {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card), 0 0 0 1px rgba(255,255,255,0.04) inset;
  position: relative;
}

.player-mockup::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(45,212,191,0.4), transparent);
}

.player-header {
  background: linear-gradient(135deg, #0f1e2e, #0a1624);
  padding: 18px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
}

.player-course-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--teal);
}

.player-progress-pill {
  background: rgba(45,212,191,0.08);
  border: 1px solid var(--border-bright);
  border-radius: 100px;
  padding: 4px 12px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--teal);
}

.video-area {
  background: #000;
  aspect-ratio: 16/7;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.video-code {
  font-family: 'Courier New', monospace;
  font-size: 0.7rem;
  color: rgba(45,212,191,0.5);
  line-height: 1.7;
  padding: 20px;
  width: 100%;
  user-select: none;
}

.video-play-btn {
  position: absolute;
  width: 52px; height: 52px;
  background: var(--teal);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: 0 0 32px rgba(45,212,191,0.4);
}

.player-lessons { padding: 14px; display: flex; flex-direction: column; gap: 8px; }

.lesson-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  font-size: 0.8rem;
  transition: all 0.2s;
}

.lesson-row.now-playing {
  border-color: rgba(45,212,191,0.3);
  background: rgba(45,212,191,0.05);
}

.lesson-icon {
  width: 26px; height: 26px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
}
.l-done { background: rgba(74,222,128,0.12); }
.l-now  { background: rgba(45,212,191,0.12); }
.l-lock { background: rgba(255,255,255,0.04); }

.lesson-name { flex: 1; font-weight: 600; color: var(--text-2); }
.lesson-dur  { font-size: 0.7rem; color: var(--text-4); }

/* ── Testimonials ── */
.testi-section { background: var(--bg-base); }

.testi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 56px;
}

.testi-card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 28px;
  transition: all 0.3s var(--ease);
  position: relative;
  overflow: hidden;
}

.testi-card::before {
  content: '"';
  position: absolute;
  top: 16px; right: 20px;
  font-family: var(--font-serif);
  font-size: 5rem;
  color: var(--teal);
  opacity: 0.06;
  line-height: 1;
}

.testi-card:hover {
  border-color: rgba(45,212,191,0.2);
  box-shadow: 0 12px 40px rgba(0,0,0,0.4);
  transform: translateY(-4px);
}

.testi-stars {
  display: flex;
  gap: 3px;
  margin-bottom: 16px;
  color: #fbbf24;
  font-size: 0.85rem;
}

.testi-text {
  font-size: 0.9rem;
  color: var(--text-3);
  line-height: 1.75;
  margin-bottom: 22px;
  font-weight: 400;
}

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

.testi-avatar {
  width: 42px; height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--bg-base);
  flex-shrink: 0;
}

.testi-name { font-size: 0.875rem; font-weight: 700; color: var(--text-2); }
.testi-role { font-size: 0.76rem; color: var(--text-4); margin-top: 1px; }

/* ── Stats Band ── */
.stats-band {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 56px 0;
}

.stats-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  overflow: hidden;
}

.stat-cell {
  background: var(--bg-2);
  padding: 32px 28px;
  text-align: center;
  transition: background 0.2s;
}
.stat-cell:hover { background: var(--bg-3); }

.stat-num {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--teal);
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-4);
  font-weight: 500;
}

/* ── CTA ── */
.cta-section {
  position: relative;
  overflow: hidden;
  padding: 100px 0;
  background: var(--bg-1);
}

.cta-orb {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 700px; height: 400px;
  background: radial-gradient(ellipse, rgba(45,212,191,0.1) 0%, transparent 65%);
  pointer-events: none;
}

.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.cta-inner .display-title { font-size: clamp(2rem, 4vw, 3.2rem); }
.cta-inner .body-lg { margin: 0 auto 40px; }

.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ── Footer ── */
footer {
  background: var(--bg-1);
  border-top: 1px solid var(--border);
  padding: 64px 0 28px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand {}

.footer-tagline {
  font-size: 0.875rem;
  color: var(--text-4);
  line-height: 1.7;
  margin: 16px 0 22px;
  max-width: 260px;
}

.socials { display: flex; gap: 8px; }

.social-btn {
  width: 36px; height: 36px;
  border-radius: var(--r-sm);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: var(--text-4);
  transition: all 0.2s;
}
.social-btn:hover { background: rgba(45,212,191,0.1); border-color: var(--border-bright); color: var(--teal); }

.footer-col h5 {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 16px;
  font-family: var(--font-body);
}

.footer-col ul { display: flex; flex-direction: column; gap: 10px; }

.footer-col ul li a {
  font-size: 0.85rem;
  color: var(--text-4);
  transition: color 0.2s;
  font-weight: 400;
}
.footer-col ul li a:hover { color: var(--teal); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-4);
}

/* ── About Page ── */
.page-hero {
  padding: calc(var(--nav-h) + 72px) 0 72px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(45,212,191,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45,212,191,0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 60% 80% at 50% 40%, black 20%, transparent 90%);
  -webkit-mask-image: radial-gradient(ellipse 60% 80% at 50% 40%, black 20%, transparent 90%);
}

.page-hero-orb {
  position: absolute;
  top: -30%; left: 50%;
  transform: translateX(-50%);
  width: 600px; height: 400px;
  background: radial-gradient(ellipse, rgba(45,212,191,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.about-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}

.about-visual-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  overflow: hidden;
  position: relative;
}

.about-visual-block::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--teal-dim), transparent);
}

.about-vis-content {
  padding: 40px;
  text-align: center;
  font-size: 5rem;
  background: linear-gradient(135deg, var(--bg-2), var(--bg-3));
  min-height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.checklist { margin-top: 28px; display: flex; flex-direction: column; gap: 14px; }

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.check-icon {
  width: 24px; height: 24px;
  border-radius: 6px;
  background: rgba(45,212,191,0.1);
  border: 1px solid var(--border-bright);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  color: var(--teal);
  flex-shrink: 0;
  margin-top: 2px;
}

.check-item p { font-size: 0.875rem; color: var(--text-3); line-height: 1.6; }
.check-item p strong { color: var(--text-2); font-weight: 600; }

/* ── Team ── */
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}

.team-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: 36px 28px;
  text-align: center;
  transition: all 0.3s var(--ease);
  position: relative;
  overflow: hidden;
}

.team-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-bright), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.team-card:hover {
  transform: translateY(-6px);
  border-color: rgba(45,212,191,0.2);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4), 0 0 40px rgba(45,212,191,0.06);
}
.team-card:hover::before { opacity: 1; }

.team-avatar {
  width: 96px; height: 96px;
  border-radius: 50%;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  border: 2px solid var(--border);
  position: relative;
}

.team-avatar::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 1px solid;
  border-color: transparent;
  background: linear-gradient(135deg, var(--teal), var(--cyan)) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: destination-out;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s;
}
.team-card:hover .team-avatar::after { opacity: 1; }

.team-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 5px;
  letter-spacing: -0.01em;
}

.team-role {
  font-size: 0.78rem;
  color: var(--teal);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.team-bio {
  font-size: 0.85rem;
  color: var(--text-3);
  line-height: 1.65;
  margin-bottom: 20px;
  font-weight: 400;
}

.team-socials { display: flex; justify-content: center; gap: 8px; }

/* ── Contact ── */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 64px;
  align-items: start;
}

.contact-info {}

.c-method {
  display: flex;
  gap: 16px;
  margin-bottom: 28px;
  align-items: flex-start;
}

.c-icon {
  width: 46px; height: 46px;
  border-radius: var(--r-md);
  background: rgba(45,212,191,0.07);
  border: 1px solid var(--border-bright);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.c-method h4 { font-size: 0.875rem; font-weight: 700; color: var(--text-2); margin-bottom: 3px; }
.c-method p  { font-size: 0.83rem; color: var(--text-3); }
.c-method a  { color: var(--teal); transition: color 0.2s; }
.c-method a:hover { color: var(--teal-bright); }

.map-box {
  margin-top: 28px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: var(--teal);
  position: relative;
  overflow: hidden;
}

.map-box::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(45,212,191,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45,212,191,0.05) 1px, transparent 1px);
  background-size: 24px 24px;
}

.contact-form-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: 36px;
  position: relative;
}

.contact-form-box::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--teal-dim), transparent);
  border-radius: var(--r-xl) var(--r-xl) 0 0;
}

.contact-form-box h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 28px;
  color: var(--text);
}

.form-group { margin-bottom: 18px; }

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-3);
  margin-bottom: 8px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 13px 16px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text);
  font-size: 0.9rem;
  outline: none;
  transition: all 0.2s;
  appearance: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--teal-dim);
  background: rgba(45,212,191,0.03);
  box-shadow: 0 0 0 3px rgba(45,212,191,0.08);
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-4); }
.form-group select option { background: var(--bg-2); color: var(--text); }
.form-group textarea { resize: vertical; min-height: 120px; }

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

.form-success {
  display: none;
  text-align: center;
  padding: 28px;
  background: rgba(74,222,128,0.06);
  border: 1px solid rgba(74,222,128,0.2);
  border-radius: var(--r-md);
  color: var(--green);
  font-weight: 600;
  margin-top: 16px;
  font-size: 0.9rem;
}

/* ── FAQ ── */
.faq-list { max-width: 680px; margin: 48px auto 0; display: flex; flex-direction: column; gap: 12px; }

.faq-item {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 22px 24px;
  transition: all 0.2s;
}

.faq-item:hover { border-color: rgba(45,212,191,0.2); }

.faq-item h4 { font-size: 0.92rem; font-weight: 700; color: var(--text-2); margin-bottom: 8px; }
.faq-item p  { font-size: 0.85rem; color: var(--text-3); line-height: 1.65; }

/* ── Scroll Reveal ── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}
.reveal.visible { opacity: 1; transform: none; }

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

/* ── Courses Filter ── */
.filter-bar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 36px; }

.filter-pill {
  padding: 7px 18px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-4);
  cursor: pointer;
  transition: all 0.2s;
}
.filter-pill:hover, .filter-pill.active {
  border-color: var(--border-bright);
  color: var(--teal);
  background: rgba(45,212,191,0.06);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .courses-grid { grid-template-columns: repeat(2, 1fr); }
  .testi-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
  .hero-inner { gap: 40px; }
  .preview-grid { gap: 40px; }
  .about-2col { gap: 40px; }
  .contact-layout { gap: 40px; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  section { padding: 64px 0; }
  .nav-links, .nav-actions { display: none; }
  .hamburger { display: flex; }

  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-desc { max-width: 100%; }
  .hero-cta { justify-content: center; }
  .hero-proof { justify-content: center; }
  .hero-visual { display: none; }

  .features-grid { grid-template-columns: 1fr; }
  .courses-grid { grid-template-columns: 1fr; }
  .steps-row { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .steps-row::before { display: none; }
  .testi-grid { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: 1fr; max-width: 360px; margin: 56px auto 0; }
  .preview-grid { grid-template-columns: 1fr; }
  .about-2col { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .steps-row { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: 1fr; }
  .display-title { font-size: 2.1rem; }
}