/* ============================================================
   YCOTES DESIGN SYSTEM v2.0
   Brand: Dark Gold (#C9A227) on Deep Dark (#0A0A0F)
   Two moods: EdTech (warm/playful) | AI Services (cool/pro)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* ── TOKENS ─────────────────────────────────────────────── */
:root {
  /* Brand Gold */
  --gold-100: #FFF8E1;
  --gold-300: #FFD54F;
  --gold-400: #FFC107;
  --gold-500: #C9A227;
  --gold-600: #A07E1A;
  --gold-700: #7A5C10;

  /* Dark Base */
  --dark-50:  #F5F5F6;
  --dark-100: #E8E8EA;
  --dark-200: #C2C2C8;
  --dark-300: #8A8A96;
  --dark-400: #55555F;
  --dark-500: #2A2A32;
  --dark-600: #1A1A22;
  --dark-700: #111118;
  --dark-800: #0A0A0F;
  --dark-900: #050508;

  /* EdTech Accent (warm amber) */
  --edtech-primary: #FFC107;
  --edtech-light:   #FFF3CD;
  --edtech-dark:    #C9A227;
  --edtech-glow:    rgba(201, 162, 39, 0.18);

  /* AI Services Accent (cool electric) */
  --ai-primary: #6C63FF;
  --ai-secondary: #00D4FF;
  --ai-light:   rgba(108, 99, 255, 0.12);
  --ai-glow:    rgba(108, 99, 255, 0.2);

  /* Semantic */
  --success: #22C55E;
  --error:   #EF4444;
  --warning: #F59E0B;
  --info:    #3B82F6;

  /* Typography */
  --font-base: 'Inter', sans-serif;
  --font-display: 'Space Grotesk', sans-serif;

  /* Spacing (8px grid) */
  --sp-1:  4px;
  --sp-2:  8px;
  --sp-3:  12px;
  --sp-4:  16px;
  --sp-5:  20px;
  --sp-6:  24px;
  --sp-8:  32px;
  --sp-10: 40px;
  --sp-12: 48px;
  --sp-16: 64px;
  --sp-20: 80px;
  --sp-24: 96px;

  /* Radii */
  --r-sm:  6px;
  --r-md:  12px;
  --r-lg:  20px;
  --r-xl:  32px;
  --r-full: 9999px;

  /* Shadows */
  --shadow-sm:   0 1px 3px rgba(0,0,0,0.3);
  --shadow-md:   0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg:   0 8px 40px rgba(0,0,0,0.5);
  --shadow-gold: 0 0 32px rgba(201,162,39,0.25);
  --shadow-ai:   0 0 32px rgba(108,99,255,0.25);

  /* Transitions */
  --t-fast:   0.15s ease;
  --t-base:   0.25s ease;
  --t-slow:   0.4s ease;
  --t-spring: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Layout */
  --container: 1280px;
  --nav-h: 70px;
}

/* ── RESET ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-base);
  background-color: var(--dark-800);
  color: var(--dark-100);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img, video { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
ul, ol { list-style: none; }
input, textarea, select { font-family: inherit; }

/* ── SCROLLBAR ───────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--dark-700); }
::-webkit-scrollbar-thumb { background: var(--gold-500); border-radius: var(--r-full); }

/* ── LAYOUT ──────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-6);
}
.section { padding-block: var(--sp-24); }
.section--sm { padding-block: var(--sp-16); }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--sp-6); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-6); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-6); }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col { display: flex; flex-direction: column; }
.gap-2 { gap: var(--sp-2); }
.gap-4 { gap: var(--sp-4); }
.gap-6 { gap: var(--sp-6); }
.gap-8 { gap: var(--sp-8); }

/* ── TYPOGRAPHY ──────────────────────────────────────────── */
.display-xl { font-family: var(--font-display); font-size: clamp(2.5rem, 5vw, 4.5rem); font-weight: 800; line-height: 1.1; letter-spacing: -1.5px; }
.display-lg { font-family: var(--font-display); font-size: clamp(2rem, 4vw, 3.5rem); font-weight: 700; line-height: 1.15; letter-spacing: -1px; }
.display-md { font-family: var(--font-display); font-size: clamp(1.5rem, 3vw, 2.5rem); font-weight: 700; line-height: 1.2; }
.display-sm { font-family: var(--font-display); font-size: clamp(1.25rem, 2vw, 1.75rem); font-weight: 600; line-height: 1.3; }
.body-lg { font-size: 1.125rem; line-height: 1.7; }
.body-md { font-size: 1rem; line-height: 1.65; }
.body-sm { font-size: 0.875rem; line-height: 1.6; }
.caption { font-size: 0.75rem; line-height: 1.5; letter-spacing: 0.4px; }
.label { font-size: 0.75rem; font-weight: 600; letter-spacing: 1.2px; text-transform: uppercase; }
.text-muted { color: var(--dark-300); }
.text-gold { color: var(--gold-500); }
.text-center { text-align: center; }
.text-gradient-gold {
  background: linear-gradient(135deg, var(--gold-300), var(--gold-500));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.text-gradient-ai {
  background: linear-gradient(135deg, var(--ai-primary), var(--ai-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── SECTION LABELS ──────────────────────────────────────── */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-1) var(--sp-3);
  border-radius: var(--r-full);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: var(--sp-4);
}
.section-label--gold { background: var(--edtech-glow); color: var(--gold-400); border: 1px solid rgba(201,162,39,0.3); }
.section-label--ai { background: var(--ai-light); color: #a5a0ff; border: 1px solid rgba(108,99,255,0.3); }

/* ── BUTTONS ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 12px 24px;
  border-radius: var(--r-md);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1;
  transition: all var(--t-base);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background var(--t-fast);
}
.btn:hover::after { background: rgba(255,255,255,0.06); }
.btn:active { transform: scale(0.98); }

.btn-primary {
  background: linear-gradient(135deg, var(--gold-400), var(--gold-500));
  color: var(--dark-800);
  box-shadow: 0 4px 20px rgba(201,162,39,0.35);
}
.btn-primary:hover { box-shadow: 0 6px 28px rgba(201,162,39,0.5); transform: translateY(-1px); }

.btn-secondary {
  background: rgba(255,255,255,0.06);
  color: var(--dark-100);
  border: 1px solid rgba(255,255,255,0.12);
  backdrop-filter: blur(8px);
}
.btn-secondary:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.2); }

.btn-ghost {
  background: transparent;
  color: var(--dark-200);
  padding: 10px 16px;
}
.btn-ghost:hover { color: var(--dark-50); background: rgba(255,255,255,0.05); }

.btn-ai {
  background: linear-gradient(135deg, var(--ai-primary), #8B85FF);
  color: #fff;
  box-shadow: 0 4px 20px rgba(108,99,255,0.35);
}
.btn-ai:hover { box-shadow: 0 6px 28px rgba(108,99,255,0.5); transform: translateY(-1px); }

.btn-sm { padding: 8px 16px; font-size: 0.8125rem; border-radius: var(--r-sm); }
.btn-lg { padding: 16px 32px; font-size: 1.0625rem; border-radius: var(--r-lg); }
.btn-icon { padding: 10px; border-radius: var(--r-md); aspect-ratio: 1; }

/* ── CARDS ───────────────────────────────────────────────── */
.card {
  background: var(--dark-700);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--r-lg);
  padding: var(--sp-6);
  transition: all var(--t-base);
}
.card:hover { border-color: rgba(201,162,39,0.25); transform: translateY(-2px); box-shadow: var(--shadow-md); }

.card-glass {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--r-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.card-glass:hover { background: rgba(255,255,255,0.06); border-color: rgba(201,162,39,0.2); }

.card-gold-border:hover { border-color: var(--gold-500); box-shadow: var(--shadow-gold); }
.card-ai-border:hover   { border-color: var(--ai-primary); box-shadow: var(--shadow-ai); }

/* ── BADGES ──────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--r-full);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.3px;
}
.badge-gold    { background: var(--edtech-glow); color: var(--gold-400); }
.badge-ai      { background: var(--ai-light); color: #a5a0ff; }
.badge-success { background: rgba(34,197,94,0.12); color: var(--success); }
.badge-free    { background: rgba(34,197,94,0.15); color: #4ade80; }
.badge-paid    { background: rgba(201,162,39,0.15); color: var(--gold-400); }
.badge-new     { background: rgba(59,130,246,0.15); color: #60a5fa; }
.badge-hot     { background: rgba(239,68,68,0.15); color: #f87171; }

/* ── DIVIDER ─────────────────────────────────────────────── */
.divider { height: 1px; background: rgba(255,255,255,0.06); margin-block: var(--sp-8); }
.divider-gold { background: linear-gradient(90deg, transparent, var(--gold-500), transparent); }

/* ── PILL TAGS ───────────────────────────────────────────── */
.pill {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--r-full);
  font-size: 0.78rem;
  font-weight: 500;
  background: var(--dark-600);
  color: var(--dark-200);
  border: 1px solid rgba(255,255,255,0.08);
}

/* ── STAT BLOCK ──────────────────────────────────────────── */
.stat-num {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1;
  color: var(--gold-400);
}
.stat-label { font-size: 0.875rem; color: var(--dark-300); margin-top: 4px; }

/* ── ICON BOX ────────────────────────────────────────────── */
.icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.375rem;
  flex-shrink: 0;
}
.icon-box--gold { background: var(--edtech-glow); color: var(--gold-400); }
.icon-box--ai   { background: var(--ai-light); color: #a5a0ff; }
.icon-box--lg   { width: 64px; height: 64px; font-size: 1.75rem; border-radius: var(--r-lg); }

/* ── NAVBAR ──────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: rgba(10,10,15,0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: all var(--t-base);
}
.navbar.scrolled { background: rgba(10,10,15,0.95); border-color: rgba(201,162,39,0.15); }
.navbar__inner { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.navbar__logo { display: flex; align-items: center; gap: 10px; }
.navbar__logo img { height: 34px; width: auto; }
.navbar__logo-text { font-family: var(--font-display); font-size: 1.25rem; font-weight: 700; color: var(--gold-400); }
.navbar__links { display: flex; align-items: center; gap: var(--sp-1); }
.navbar__link {
  padding: 7px 14px;
  border-radius: var(--r-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--dark-200);
  transition: all var(--t-fast);
}
.navbar__link:hover { color: var(--dark-50); background: rgba(255,255,255,0.05); }
.navbar__link.active { color: var(--gold-400); }
.navbar__actions { display: flex; align-items: center; gap: var(--sp-3); }
.navbar__hamburger { display: none; width: 36px; height: 36px; flex-direction: column; justify-content: center; align-items: center; gap: 5px; border-radius: var(--r-sm); transition: background var(--t-fast); }
.navbar__hamburger:hover { background: rgba(255,255,255,0.07); }
.navbar__hamburger span { display: block; width: 20px; height: 2px; background: var(--dark-200); border-radius: 2px; transition: all var(--t-base); }

/* Mobile Nav Drawer */
.nav-drawer {
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--dark-800);
  z-index: 999;
  padding: var(--sp-6);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  transform: translateX(100%);
  transition: transform var(--t-base);
  border-top: 1px solid rgba(255,255,255,0.06);
}
.nav-drawer.open { transform: translateX(0); }
.nav-drawer__link {
  padding: 14px 16px;
  border-radius: var(--r-md);
  font-size: 1rem;
  font-weight: 500;
  color: var(--dark-200);
  transition: all var(--t-fast);
  border: 1px solid transparent;
}
.nav-drawer__link:hover { color: var(--dark-50); background: rgba(255,255,255,0.05); border-color: rgba(255,255,255,0.08); }

/* ── HERO ────────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  padding-top: calc(var(--nav-h) + var(--sp-16));
  padding-bottom: var(--sp-20);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.hero__glow-1 {
  position: absolute;
  top: -200px;
  left: -200px;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(201,162,39,0.08) 0%, transparent 70%);
  border-radius: 50%;
}
.hero__glow-2 {
  position: absolute;
  bottom: -200px;
  right: -200px;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(108,99,255,0.07) 0%, transparent 70%);
  border-radius: 50%;
}
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 75%);
}
.hero__content { position: relative; z-index: 1; }

/* ── FEATURE GRID ────────────────────────────────────────── */
.feature-card {
  background: var(--dark-700);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--r-lg);
  padding: var(--sp-6);
  transition: all var(--t-base);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gold-400), var(--gold-600));
  opacity: 0;
  transition: opacity var(--t-base);
}
.feature-card:hover::before { opacity: 1; }
.feature-card:hover { transform: translateY(-4px); border-color: rgba(201,162,39,0.2); box-shadow: 0 12px 40px rgba(0,0,0,0.4); }
.feature-card--ai::before { background: linear-gradient(90deg, var(--ai-primary), var(--ai-secondary)); }
.feature-card--ai:hover { border-color: rgba(108,99,255,0.25); }

/* ── YCOIN ───────────────────────────────────────────────── */
.ycoin-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px 4px 6px;
  background: linear-gradient(135deg, rgba(201,162,39,0.2), rgba(201,162,39,0.08));
  border: 1px solid rgba(201,162,39,0.3);
  border-radius: var(--r-full);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--gold-400);
}
.ycoin-badge .coin-icon { width: 20px; height: 20px; background: linear-gradient(135deg, #FFD700, #C9A227); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 11px; color: #000; font-weight: 800; }

.ycoin-card {
  background: linear-gradient(135deg, rgba(201,162,39,0.12), rgba(201,162,39,0.04));
  border: 1px solid rgba(201,162,39,0.25);
  border-radius: var(--r-lg);
  padding: var(--sp-6);
}
.ycoin-balance {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  color: var(--gold-400);
  line-height: 1;
}

/* ── BLOG CARD ───────────────────────────────────────────── */
.blog-card {
  background: var(--dark-700);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: all var(--t-base);
}
.blog-card:hover { border-color: rgba(201,162,39,0.2); transform: translateY(-3px); box-shadow: var(--shadow-md); }
.blog-card__img { width: 100%; height: 200px; object-fit: cover; }
.blog-card__body { padding: var(--sp-5); }
.blog-card__cat { font-size: 0.72rem; font-weight: 600; color: var(--gold-400); text-transform: uppercase; letter-spacing: 1px; margin-bottom: var(--sp-2); }
.blog-card__title { font-family: var(--font-display); font-size: 1.0625rem; font-weight: 600; line-height: 1.4; margin-bottom: var(--sp-2); }
.blog-card__excerpt { font-size: 0.875rem; color: var(--dark-300); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.blog-card__footer { display: flex; align-items: center; justify-content: space-between; padding: var(--sp-4) var(--sp-5); border-top: 1px solid rgba(255,255,255,0.05); }
.blog-card__meta { font-size: 0.78rem; color: var(--dark-300); }
.blog-card__read-time { font-size: 0.75rem; color: var(--dark-400); }

/* ── TESTIMONIAL ─────────────────────────────────────────── */
.testimonial-card {
  background: var(--dark-700);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--r-lg);
  padding: var(--sp-6);
  position: relative;
}
.testimonial-card::before {
  content: '"';
  position: absolute;
  top: var(--sp-4);
  right: var(--sp-6);
  font-size: 5rem;
  font-family: Georgia, serif;
  color: rgba(201,162,39,0.12);
  line-height: 1;
}
.testimonial-stars { color: var(--gold-400); font-size: 0.875rem; letter-spacing: 2px; margin-bottom: var(--sp-3); }
.testimonial-text { font-size: 0.9375rem; line-height: 1.7; color: var(--dark-200); margin-bottom: var(--sp-5); }
.testimonial-author { display: flex; align-items: center; gap: var(--sp-3); }
.testimonial-avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--edtech-glow); border: 2px solid rgba(201,162,39,0.3); display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 1rem; color: var(--gold-400); flex-shrink: 0; }
.testimonial-name { font-weight: 600; font-size: 0.9rem; }
.testimonial-role { font-size: 0.78rem; color: var(--dark-300); }

/* ── PROGRESS / STREAK ───────────────────────────────────── */
.progress-bar { height: 6px; background: var(--dark-600); border-radius: var(--r-full); overflow: hidden; }
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--gold-400), var(--gold-300)); border-radius: var(--r-full); transition: width 0.6s ease; }
.streak-dot { width: 10px; height: 10px; border-radius: 50%; }
.streak-dot.active { background: var(--gold-400); box-shadow: 0 0 8px rgba(201,162,39,0.5); }
.streak-dot.inactive { background: var(--dark-500); }

/* ── FORMS ───────────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: var(--sp-2); }
.form-label { font-size: 0.875rem; font-weight: 500; color: var(--dark-200); }
.form-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--dark-700);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--r-md);
  color: var(--dark-50);
  font-size: 0.9375rem;
  transition: all var(--t-fast);
  outline: none;
}
.form-input:focus { border-color: var(--gold-500); box-shadow: 0 0 0 3px rgba(201,162,39,0.12); }
.form-input::placeholder { color: var(--dark-400); }
.form-hint { font-size: 0.78rem; color: var(--dark-400); }

/* ── TOAST / ALERTS ──────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: var(--sp-6);
  right: var(--sp-6);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  pointer-events: none;
}
.toast-item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 14px 20px;
  background: var(--dark-600);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-lg);
  animation: slideInRight 0.3s ease forwards, fadeOut 0.3s 3.7s forwards;
  pointer-events: all;
  max-width: 380px;
}
.toast-item.ycoin { border-color: rgba(201,162,39,0.4); background: rgba(201,162,39,0.1); }

@keyframes slideInRight { from { transform: translateX(120%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes fadeOut { from { opacity: 1; } to { opacity: 0; transform: translateY(10px); } }

/* ── FOOTER ──────────────────────────────────────────────── */
.footer {
  background: var(--dark-900);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: var(--sp-16);
}
.footer__grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--sp-8); padding-bottom: var(--sp-12); }
.footer__brand p { color: var(--dark-300); font-size: 0.9rem; line-height: 1.7; margin-top: var(--sp-4); max-width: 280px; }
.footer__col-title { font-size: 0.8125rem; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; color: var(--dark-300); margin-bottom: var(--sp-4); }
.footer__links { display: flex; flex-direction: column; gap: var(--sp-2); }
.footer__link { font-size: 0.875rem; color: var(--dark-300); transition: color var(--t-fast); padding: 2px 0; }
.footer__link:hover { color: var(--gold-400); }
.footer__bottom { border-top: 1px solid rgba(255,255,255,0.05); padding: var(--sp-6) 0; display: flex; align-items: center; justify-content: space-between; }
.footer__copy { font-size: 0.8125rem; color: var(--dark-400); }
.footer__socials { display: flex; gap: var(--sp-3); }
.footer__social { width: 36px; height: 36px; border-radius: var(--r-sm); background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.08); display: flex; align-items: center; justify-content: center; color: var(--dark-300); font-size: 0.9rem; transition: all var(--t-fast); }
.footer__social:hover { background: var(--edtech-glow); border-color: rgba(201,162,39,0.3); color: var(--gold-400); }

/* ── ANIMATIONS ──────────────────────────────────────────── */
@keyframes fadeUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
@keyframes shimmer { from { background-position: -200% center; } to { background-position: 200% center; } }

.animate-fade-up { animation: fadeUp 0.6s ease forwards; }
.animate-fade-in { animation: fadeIn 0.4s ease forwards; }
.animate-float { animation: float 4s ease-in-out infinite; }

[data-aos] { opacity: 0; transform: translateY(20px); transition: all 0.5s ease; }
[data-aos].aos-animate { opacity: 1; transform: translateY(0); }
[data-aos="fade-left"] { transform: translateX(-20px); }
[data-aos="fade-left"].aos-animate { transform: translateX(0); }
[data-aos="fade-right"] { transform: translateX(20px); }
[data-aos="fade-right"].aos-animate { transform: translateX(0); }

/* ── SKELETON LOADER ─────────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg, var(--dark-600) 25%, var(--dark-500) 50%, var(--dark-600) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--r-md);
}

/* ── AI SERVICES SPECIFIC ────────────────────────────────── */
.ai-section { background: linear-gradient(180deg, var(--dark-800) 0%, var(--dark-900) 100%); }
.ai-card {
  background: rgba(108,99,255,0.05);
  border: 1px solid rgba(108,99,255,0.15);
  border-radius: var(--r-lg);
  padding: var(--sp-6);
  transition: all var(--t-base);
  position: relative;
  overflow: hidden;
}
.ai-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--ai-primary), var(--ai-secondary));
  opacity: 0;
  transition: opacity var(--t-base);
}
.ai-card:hover { border-color: rgba(108,99,255,0.35); transform: translateY(-4px); box-shadow: 0 12px 40px rgba(108,99,255,0.15); }
.ai-card:hover::after { opacity: 1; }

/* ── RESPONSIVE ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --sp-24: 64px; --sp-20: 56px; --sp-16: 48px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: var(--sp-6); }
  .navbar__links { display: none; }
  .navbar__hamburger { display: flex; }
  .container { padding-inline: var(--sp-5); }
  .footer__bottom { flex-direction: column; gap: var(--sp-4); text-align: center; }
}

@media (max-width: 480px) {
  .btn-lg { padding: 14px 24px; font-size: 1rem; }
  .hero { padding-bottom: var(--sp-16); }
}

/* ── UTILITIES ───────────────────────────────────────────── */
.hidden { display: none !important; }
.visible { display: block !important; }
.overflow-hidden { overflow: hidden; }
.relative { position: relative; }
.absolute { position: absolute; }
.z-10 { z-index: 10; }
.w-full { width: 100%; }
.h-full { height: 100%; }
.cursor-pointer { cursor: pointer; }
.select-none { user-select: none; }
.mt-2 { margin-top: var(--sp-2); } .mt-4 { margin-top: var(--sp-4); } .mt-6 { margin-top: var(--sp-6); } .mt-8 { margin-top: var(--sp-8); } .mt-10 { margin-top: var(--sp-10); }
.mb-2 { margin-bottom: var(--sp-2); } .mb-4 { margin-bottom: var(--sp-4); } .mb-6 { margin-bottom: var(--sp-6); } .mb-8 { margin-bottom: var(--sp-8); }
.p-4 { padding: var(--sp-4); } .p-6 { padding: var(--sp-6); }