/* ============================================================
   LINGOMENTOR AI — Main Stylesheet
   Version 1.0.0  |  Dark Luxury AI Design System
   ============================================================ */

/* ── Design Tokens ──────────────────────────────────────────── */
:root {
  --bg-base:        #04091A;
  --bg-surface:     #080F24;
  --bg-elevated:    #0E1830;
  --bg-card:        rgba(14,24,48,0.75);
  --bg-glass:       rgba(255,255,255,0.04);
  --bg-glass-hover: rgba(255,255,255,0.07);

  --blue:           #3B82F6;
  --blue-light:     #60A5FA;
  --blue-dark:      #2563EB;
  --violet:         #8B5CF6;
  --violet-light:   #A78BFA;
  --cyan:           #06B6D4;
  --cyan-light:     #22D3EE;
  --pink:           #EC4899;
  --green:          #22C55E;
  --amber:          #F59E0B;

  --grad-primary:   linear-gradient(135deg,#3B82F6 0%,#8B5CF6 100%);
  --grad-secondary: linear-gradient(135deg,#06B6D4 0%,#3B82F6 100%);
  --grad-accent:    linear-gradient(135deg,#8B5CF6 0%,#EC4899 100%);

  --text-primary:   #EEF2FF;
  --text-secondary: #8B9AC4;
  --text-muted:     #3D4F72;
  --text-accent:    #60A5FA;

  --border-subtle:  rgba(255,255,255,0.06);
  --border-card:    rgba(255,255,255,0.09);
  --border-glow:    rgba(59,130,246,0.45);

  --shadow-card:    0 8px 40px rgba(0,0,0,0.5);
  --glow-blue:      0 0 40px rgba(59,130,246,0.28);
  --glow-violet:    0 0 40px rgba(139,92,246,0.28);
  --glow-cyan:      0 0 40px rgba(6,182,212,0.28);

  --r-sm:  8px;
  --r-md:  12px;
  --r-lg:  16px;
  --r-xl:  24px;
  --r-2xl: 32px;
  --r-pill:9999px;

  --font-display: 'Sora', 'Segoe UI', system-ui, sans-serif;
  --font-body:    'DM Sans', 'Segoe UI', system-ui, sans-serif;

  --nav-h: 72px;
  --ease:  cubic-bezier(.4,0,.2,1);
}

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

/* ── Scrollbar ──────────────────────────────────────────────── */
::-webkit-scrollbar { width:5px; }
::-webkit-scrollbar-track { background:var(--bg-base); }
::-webkit-scrollbar-thumb { background:var(--grad-primary); border-radius:var(--r-pill); }

/* ============================================================
   LOADING SCREEN
   ============================================================ */
.loading-screen {
  position:fixed; inset:0;
  background:var(--bg-base);
  display:flex; flex-direction:column;
  align-items:center; justify-content:center;
  z-index:9999;
  transition:opacity .8s var(--ease), visibility .8s var(--ease);
}
.loading-screen.out { opacity:0; visibility:hidden; pointer-events:none; }

.load-particles { position:absolute; inset:0; overflow:hidden; }
.load-particle {
  position:absolute;
  width:3px; height:3px;
  border-radius:50%;
  animation:ptFloat var(--d,4s) var(--delay,0s) infinite ease-in-out;
  opacity:.5;
}

.load-logo-wrap {
  position:relative;
  width:128px; height:128px;
  margin-bottom:32px;
}
.load-ring {
  position:absolute; inset:0;
  border-radius:50%;
  border:2px solid transparent;
}
.load-ring-outer {
  border-top-color:var(--blue);
  border-right-color:var(--violet);
  width:100%; height:100%;
  animation:spin 2s linear infinite;
}
.load-ring-inner {
  border-bottom-color:var(--cyan);
  border-left-color:var(--blue);
  inset:14px;
  animation:spin 1.4s linear infinite reverse;
}
.load-icon-center {
  position:absolute; inset:22px;
  background:var(--grad-primary);
  border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  animation:iconPulse 2s ease-in-out infinite;
}

.load-brand {
  font-family:var(--font-display);
  font-size:2.25rem; font-weight:800;
  letter-spacing:-.04em;
  background:var(--grad-primary);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
  margin-bottom:6px;
}
.load-tagline {
  font-size:.75rem; font-weight:600;
  letter-spacing:.14em; text-transform:uppercase;
  color:var(--text-muted);
  margin-bottom:36px;
}
.load-status {
  font-size:.875rem;
  color:var(--text-secondary);
  margin-bottom:20px;
  min-height:1.4em;
  transition:opacity .35s ease;
  letter-spacing:.02em;
}
.load-track {
  width:220px; height:2px;
  background:var(--bg-elevated);
  border-radius:var(--r-pill);
  overflow:hidden;
}
.load-bar {
  height:100%;
  background:var(--grad-primary);
  border-radius:var(--r-pill);
  width:0;
  animation:progFill 3s ease-out forwards;
  box-shadow:0 0 10px var(--blue);
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position:fixed; top:0; left:0; right:0;
  height:var(--nav-h);
  z-index:1000;
  transition:background .3s var(--ease), box-shadow .3s var(--ease);
}
.nav.scrolled {
  background:rgba(4,9,26,.88);
  backdrop-filter:blur(24px);
  -webkit-backdrop-filter:blur(24px);
  border-bottom:1px solid var(--border-subtle);
  box-shadow:0 4px 40px rgba(0,0,0,.4);
}
.nav-inner {
  max-width:1300px; margin:0 auto;
  padding:0 28px; height:100%;
  display:flex; align-items:center; justify-content:space-between;
}
.nav-logo {
  display:flex; align-items:center; gap:12px;
  text-decoration:none;
}
.nav-logo-icon {
  width:40px; height:40px;
  background:var(--grad-primary);
  border-radius:var(--r-md);
  display:flex; align-items:center; justify-content:center;
  box-shadow:var(--glow-blue);
  flex-shrink:0;
}
.nav-logo-name {
  font-family:var(--font-display);
  font-size:1.2rem; font-weight:800;
  letter-spacing:-.03em;
  background:var(--grad-primary);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
  line-height:1.1;
}
.nav-logo-sub {
  font-size:.6rem; font-weight:600;
  letter-spacing:.08em; text-transform:uppercase;
  color:var(--text-muted);
}
.nav-links {
  display:flex; align-items:center; gap:36px;
}
.nav-link {
  font-size:.9375rem; font-weight:500;
  color:var(--text-secondary);
  transition:color .2s;
  position:relative;
}
.nav-link::after {
  content:''; position:absolute;
  bottom:-3px; left:0; right:0; height:2px;
  background:var(--grad-primary);
  border-radius:var(--r-pill);
  transform:scaleX(0); transform-origin:left;
  transition:transform .3s var(--ease);
}
.nav-link:hover { color:var(--text-primary); }
.nav-link:hover::after { transform:scaleX(1); }

.nav-actions { display:flex; align-items:center; gap:10px; }
.nav-hamburger {
  display:none;
  width:40px; height:40px;
  align-items:center; justify-content:center;
  color:var(--text-secondary);
  border-radius:var(--r-md);
  transition:all .2s;
}
.nav-hamburger:hover { color:var(--text-primary); background:var(--bg-glass); }

/* Mobile Menu */
.nav-mobile {
  display:none; position:fixed;
  top:var(--nav-h); left:0; right:0;
  background:rgba(4,9,26,.97);
  backdrop-filter:blur(28px);
  -webkit-backdrop-filter:blur(28px);
  border-bottom:1px solid var(--border-subtle);
  padding:20px 24px;
  flex-direction:column; gap:6px;
  z-index:999;
}
.nav-mobile.open { display:flex; }
.nav-mobile-link {
  padding:12px 16px; border-radius:var(--r-md);
  font-size:1rem; font-weight:500;
  color:var(--text-secondary);
  transition:all .2s;
}
.nav-mobile-link:hover { color:var(--text-primary); background:var(--bg-glass); }
.nav-mobile-divider {
  height:1px; background:var(--border-subtle);
  margin:8px 0;
}
.nav-mobile-ctas {
  display:flex; flex-direction:column; gap:10px;
  padding-top:6px;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--font-body);
  font-size:.9375rem; font-weight:600;
  padding:11px 22px;
  border-radius:var(--r-md);
  transition:all .3s var(--ease);
  white-space:nowrap;
  cursor:pointer;
}
.btn-ghost {
  color:var(--text-secondary); padding:11px 16px;
}
.btn-ghost:hover { color:var(--text-primary); background:var(--bg-glass); }
.btn-outline {
  color:var(--text-primary);
  border:1px solid var(--border-card);
}
.btn-outline:hover {
  background:var(--bg-glass-hover);
  border-color:var(--border-glow);
}
.btn-primary {
  background:var(--grad-primary);
  color:#fff;
  box-shadow:0 4px 24px rgba(59,130,246,.32);
}
.btn-primary:hover {
  transform:translateY(-2px);
  box-shadow:0 10px 36px rgba(59,130,246,.5);
}
.btn-primary:active { transform:translateY(0); }
.btn-lg {
  font-size:1.0625rem;
  padding:14px 30px;
  border-radius:var(--r-lg);
}
.btn-sm { font-size:.875rem; padding:8px 16px; }
.btn-full { width:100%; justify-content:center; }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  min-height:100vh;
  display:flex; align-items:center;
  position:relative; overflow:hidden;
  padding-top:var(--nav-h);
}
.hero-bg { position:absolute; inset:0; z-index:0; }
.hero-orb {
  position:absolute; border-radius:50%;
  filter:blur(90px); opacity:.2;
  animation:orbDrift 9s ease-in-out infinite;
}
.orb-blue  { width:700px;height:700px; background:radial-gradient(circle,var(--blue),transparent 70%);  top:-250px; left:-150px; }
.orb-violet{ width:550px;height:550px; background:radial-gradient(circle,var(--violet),transparent 70%);top:-150px; right:-80px; animation-delay:-3.5s; }
.orb-cyan  { width:450px;height:450px; background:radial-gradient(circle,var(--cyan),transparent 70%);  bottom:-50px;left:35%;   animation-delay:-7s; }

.hero-grid {
  position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(59,130,246,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,130,246,.055) 1px, transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(ellipse 80% 80% at 50% 0%, black 30%, transparent 100%);
  -webkit-mask-image:radial-gradient(ellipse 80% 80% at 50% 0%, black 30%, transparent 100%);
}

.hero-wrap {
  max-width:1300px; margin:0 auto;
  padding:96px 28px 80px;
  position:relative; z-index:1;
  text-align:center;
}
.hero-badge {
  display:inline-flex; align-items:center; gap:10px;
  background:rgba(59,130,246,.1);
  border:1px solid rgba(59,130,246,.25);
  padding:7px 18px; border-radius:var(--r-pill);
  font-size:.75rem; font-weight:700;
  letter-spacing:.08em; text-transform:uppercase;
  color:var(--blue-light); margin-bottom:28px;
}
.badge-dot {
  width:7px; height:7px; border-radius:50%;
  background:var(--cyan);
  animation:blink 1.5s ease-in-out infinite;
}
.hero-h1 {
  font-family:var(--font-display);
  font-size:clamp(2.6rem,6.5vw,5rem);
  font-weight:800; letter-spacing:-.05em;
  line-height:1.07; color:var(--text-primary);
  margin-bottom:24px;
}
.grad-text { background:var(--grad-primary); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.grad-text-2{ background:var(--grad-secondary);-webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }

.hero-sub {
  font-size:clamp(1rem,2vw,1.25rem);
  color:var(--text-secondary); line-height:1.75;
  max-width:580px; margin:0 auto 44px;
}
.hero-ctas {
  display:flex; flex-wrap:wrap; justify-content:center;
  gap:14px; margin-bottom:64px;
}
.hero-cards {
  display:grid; grid-template-columns:repeat(3,1fr);
  gap:16px; max-width:860px; margin:0 auto;
}
.hero-card {
  background:var(--bg-glass);
  border:1px solid var(--border-card);
  border-radius:var(--r-xl);
  padding:28px 20px; text-align:center;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:all .35s var(--ease);
  position:relative; overflow:hidden;
}
.hero-card::before {
  content:''; position:absolute;
  top:0; left:0; right:0; height:1px;
  background:var(--grad-primary);
  opacity:0; transition:opacity .35s;
}
.hero-card:hover { transform:translateY(-7px); border-color:rgba(59,130,246,.3); box-shadow:var(--glow-blue); }
.hero-card:hover::before { opacity:1; }
.hero-card-icon {
  width:52px; height:52px; border-radius:var(--r-lg);
  display:flex; align-items:center; justify-content:center;
  margin:0 auto 14px;
}
.hero-card-title { font-family:var(--font-display); font-size:.9375rem; font-weight:700; color:var(--text-primary); margin-bottom:6px; }
.hero-card-desc  { font-size:.8125rem; color:var(--text-secondary); line-height:1.5; }

/* Icon colour variants */
.ic-blue   { background:rgba(59,130,246,.12); border:1px solid rgba(59,130,246,.25); color:var(--blue-light); }
.ic-violet { background:rgba(139,92,246,.12); border:1px solid rgba(139,92,246,.25); color:var(--violet-light); }
.ic-cyan   { background:rgba(6,182,212,.12);  border:1px solid rgba(6,182,212,.25);  color:var(--cyan); }
.ic-pink   { background:rgba(236,72,153,.12); border:1px solid rgba(236,72,153,.25); color:var(--pink); }
.ic-green  { background:rgba(34,197,94,.12);  border:1px solid rgba(34,197,94,.25);  color:var(--green); }
.ic-amber  { background:rgba(245,158,11,.12); border:1px solid rgba(245,158,11,.25); color:var(--amber); }

/* ============================================================
   STATS BAR
   ============================================================ */
.stats { padding:10px 0 0; }
.stats-wrap { max-width:1300px; margin:0 auto; padding:0 28px; }
.stats-inner {
  background:var(--bg-glass);
  border:1px solid var(--border-card);
  border-radius:var(--r-2xl);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  display:grid; grid-template-columns:repeat(4,1fr);
  position:relative; overflow:hidden;
}
.stats-inner::before {
  content:''; position:absolute;
  top:0; left:0; right:0; height:1px;
  background:var(--grad-primary); opacity:.55;
}
.stat {
  padding:30px 20px;
  text-align:center;
  position:relative;
}
.stat:not(:last-child)::after {
  content:''; position:absolute;
  right:0; top:22%; bottom:22%;
  width:1px; background:var(--border-subtle);
}
.stat-icon-wrap {
  width:42px; height:42px;
  border-radius:var(--r-md);
  display:flex; align-items:center; justify-content:center;
  margin:0 auto 12px;
}
.stat-num {
  font-family:var(--font-display);
  font-size:2.25rem; font-weight:800;
  background:var(--grad-primary);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
  line-height:1; margin-bottom:4px;
}
.stat-lbl { font-size:.8125rem; color:var(--text-secondary); font-weight:500; letter-spacing:.02em; }

/* ============================================================
   SECTION BASE
   ============================================================ */
.section { padding:100px 0; position:relative; }
.container { max-width:1300px; margin:0 auto; padding:0 28px; }
.sec-head { text-align:center; max-width:620px; margin:0 auto 72px; }
.sec-badge {
  display:inline-flex; align-items:center; gap:8px;
  font-size:.7rem; font-weight:700; letter-spacing:.1em;
  text-transform:uppercase; color:var(--blue-light); margin-bottom:16px;
}
.sec-title {
  font-family:var(--font-display);
  font-size:clamp(1.875rem,4vw,2.875rem);
  font-weight:800; letter-spacing:-.04em;
  line-height:1.12; color:var(--text-primary); margin-bottom:18px;
}
.sec-desc { font-size:1.0625rem; color:var(--text-secondary); line-height:1.75; }

/* ============================================================
   FEATURES
   ============================================================ */
.features { background:linear-gradient(180deg,var(--bg-base) 0%,var(--bg-surface) 50%,var(--bg-base) 100%); }
.feat-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:18px; }
.feat-card {
  background:var(--bg-card);
  border:1px solid var(--border-card);
  border-radius:var(--r-xl); padding:32px 24px;
  transition:all .35s var(--ease);
  position:relative; overflow:hidden; cursor:pointer;
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.feat-card:hover {
  transform:translateY(-9px);
  border-color:rgba(59,130,246,.35);
  box-shadow:0 24px 64px rgba(0,0,0,.45), var(--glow-blue);
}
.feat-card:hover .feat-icon { transform:scale(1.1); }
.feat-icon {
  width:56px; height:56px; border-radius:var(--r-lg);
  display:flex; align-items:center; justify-content:center;
  margin-bottom:20px; transition:transform .35s var(--ease);
}
.feat-title { font-family:var(--font-display); font-size:1.0625rem; font-weight:700; color:var(--text-primary); margin-bottom:10px; }
.feat-desc  { font-size:.875rem; color:var(--text-secondary); line-height:1.65; margin-bottom:20px; }
.feat-link  {
  display:inline-flex; align-items:center; gap:6px;
  font-size:.875rem; font-weight:600;
  transition:gap .2s;
}
.feat-card:hover .feat-link { gap:10px; }

/* ============================================================
   AI SHOWCASE
   ============================================================ */
.ai-split {
  display:grid; grid-template-columns:1fr 1fr;
  gap:72px; align-items:center;
}
.ai-benefits { display:flex; flex-direction:column; gap:16px; margin:28px 0 36px; }
.ai-benefit {
  display:flex; align-items:flex-start; gap:14px;
}
.ai-benefit-icon {
  width:38px; height:38px; border-radius:10px;
  display:flex; align-items:center; justify-content:center;
  flex-shrink:0;
}
.ai-benefit-title { font-family:var(--font-display); font-size:.9375rem; font-weight:700; color:var(--text-primary); margin-bottom:4px; }
.ai-benefit-desc  { font-size:.875rem; color:var(--text-secondary); line-height:1.55; }

/* Chat Demo */
.chat-box {
  background:var(--bg-surface);
  border:1px solid var(--border-card);
  border-radius:var(--r-2xl);
  overflow:hidden; box-shadow:var(--shadow-card);
}
.chat-head {
  background:var(--bg-elevated);
  border-bottom:1px solid var(--border-subtle);
  padding:16px 22px; display:flex; align-items:center; gap:12px;
}
.chat-head-avatar {
  width:38px; height:38px; background:var(--grad-primary);
  border-radius:50%; display:flex; align-items:center; justify-content:center; flex-shrink:0;
}
.chat-head-name   { font-size:.875rem; font-weight:700; color:var(--text-primary); }
.chat-head-status { display:flex; align-items:center; gap:5px; font-size:.6875rem; color:var(--green); }
.status-dot { width:6px; height:6px; border-radius:50%; background:var(--green); animation:blink 1.5s ease-in-out infinite; }

.chat-body { padding:20px; display:flex; flex-direction:column; gap:16px; min-height:310px; }
.msg { display:flex; gap:10px; max-width:87%; }
.msg-bot  { align-self:flex-start; }
.msg-user { align-self:flex-end; flex-direction:row-reverse; }
.msg-av {
  width:30px; height:30px; border-radius:50%; flex-shrink:0;
  display:flex; align-items:center; justify-content:center;
  font-size:.75rem; font-weight:700;
}
.msg-av-bot  { background:var(--grad-primary); color:#fff; }
.msg-av-user { background:var(--bg-elevated); border:1px solid var(--border-card); color:var(--text-secondary); }
.bubble {
  padding:11px 16px; border-radius:var(--r-lg);
  font-size:.875rem; line-height:1.55;
}
.msg-bot  .bubble { background:var(--bg-elevated); border:1px solid var(--border-subtle); color:var(--text-primary); border-radius:4px var(--r-lg) var(--r-lg) var(--r-lg); }
.msg-user .bubble { background:var(--grad-primary); color:#fff; border-radius:var(--r-lg) 4px var(--r-lg) var(--r-lg); }

.chat-footer {
  border-top:1px solid var(--border-subtle);
  padding:14px 18px; display:flex; align-items:center; gap:10px;
}
.chat-input {
  flex:1; background:var(--bg-elevated);
  border:1px solid var(--border-subtle);
  border-radius:var(--r-md); padding:11px 16px;
  font-size:.875rem; color:var(--text-muted);
  font-family:var(--font-body); pointer-events:none;
}
.chat-send {
  width:38px; height:38px; background:var(--grad-primary);
  border-radius:var(--r-md); display:flex; align-items:center; justify-content:center; color:#fff;
}

/* ============================================================
   SUBJECTS
   ============================================================ */
.subjects { background:var(--bg-surface); }
.tabs-bar  {
  display:flex; justify-content:center; margin-bottom:44px;
}
.tabs-inner {
  display:inline-flex; gap:6px;
  background:var(--bg-elevated);
  border:1px solid var(--border-card);
  padding:6px; border-radius:var(--r-pill);
}
.tab-btn {
  padding:9px 28px; border-radius:var(--r-pill);
  font-size:.9375rem; font-weight:600;
  color:var(--text-secondary);
  transition:all .3s var(--ease);
}
.tab-btn:hover  { color:var(--text-primary); }
.tab-btn.active { background:var(--grad-primary); color:#fff; box-shadow:0 4px 20px rgba(59,130,246,.3); }

.subj-grid { display:grid; grid-template-columns:repeat(5,1fr); gap:14px; }
.subj-card {
  background:var(--bg-card);
  border:1px solid var(--border-card);
  border-radius:var(--r-lg); padding:22px 16px;
  text-align:center; transition:all .3s var(--ease); cursor:pointer;
  backdrop-filter:blur(8px); -webkit-backdrop-filter:blur(8px);
}
.subj-card:hover {
  transform:translateY(-5px);
  border-color:rgba(59,130,246,.3);
  box-shadow:0 16px 48px rgba(0,0,0,.35), var(--glow-blue);
}
.subj-icon {
  width:48px; height:48px; border-radius:var(--r-md);
  display:flex; align-items:center; justify-content:center;
  margin:0 auto 12px;
}
.subj-name  { font-family:var(--font-display); font-size:.875rem; font-weight:700; color:var(--text-primary); margin-bottom:4px; }
.subj-count { font-size:.75rem; color:var(--text-muted); }

/* ============================================================
   TESTIMONIALS
   ============================================================ */
.testi-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
.testi-card {
  background:var(--bg-card); border:1px solid var(--border-card);
  border-radius:var(--r-xl); padding:32px 28px;
  backdrop-filter:blur(10px); -webkit-backdrop-filter:blur(10px);
  transition:all .3s var(--ease);
}
.testi-card:hover { transform:translateY(-5px); border-color:rgba(59,130,246,.25); box-shadow:var(--glow-blue); }
.testi-quote { font-family:Georgia,serif; font-size:3.5rem; line-height:1; color:var(--blue); opacity:.3; margin-bottom:12px; }
.testi-stars { display:flex; gap:4px; color:var(--amber); margin-bottom:18px; }
.testi-text  { font-size:.9375rem; color:var(--text-secondary); line-height:1.75; margin-bottom:24px; }
.testi-author{ display:flex; align-items:center; gap:14px; }
.testi-av    { width:46px; height:46px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-family:var(--font-display); font-size:1rem; font-weight:800; flex-shrink:0; }
.testi-name  { font-size:.9375rem; font-weight:700; color:var(--text-primary); }
.testi-role  { font-size:.8125rem; color:var(--text-muted); }

/* ============================================================
   PRICING
   ============================================================ */
.pricing { background:linear-gradient(180deg,var(--bg-base),var(--bg-surface) 50%,var(--bg-base)); }
.billing-wrap { display:flex; justify-content:center; margin-top:24px; }
.billing-pill {
  display:inline-flex; align-items:center; gap:4px;
  background:var(--bg-elevated);
  border:1px solid var(--border-card);
  border-radius:var(--r-pill); padding:5px;
}
.billing-btn {
  padding:8px 22px; border-radius:var(--r-pill);
  font-size:.875rem; font-weight:600;
  color:var(--text-secondary); transition:all .3s var(--ease);
}
.billing-btn.active { background:var(--grad-primary); color:#fff; box-shadow:0 4px 18px rgba(59,130,246,.3); }
.save-badge {
  font-size:.65rem; font-weight:700;
  background:rgba(34,197,94,.14); color:var(--green);
  border:1px solid rgba(34,197,94,.3);
  padding:2px 8px; border-radius:var(--r-pill); margin-left:4px;
}

.price-grid {
  display:grid; grid-template-columns:repeat(3,1fr);
  gap:20px; max-width:980px; margin:48px auto 0;
  align-items:start;
}
.price-card {
  background:var(--bg-card); border:1px solid var(--border-card);
  border-radius:var(--r-xl); padding:32px;
  position:relative; overflow:hidden;
  transition:all .3s var(--ease);
  backdrop-filter:blur(10px); -webkit-backdrop-filter:blur(10px);
}
.price-card--hot {
  border-color:rgba(139,92,246,.5);
  background:linear-gradient(135deg,rgba(59,130,246,.07),rgba(139,92,246,.07));
  box-shadow:0 0 70px rgba(139,92,246,.18), var(--glow-violet);
  transform:scale(1.04);
}
.price-card:not(.price-card--hot):hover {
  transform:translateY(-5px); border-color:rgba(59,130,246,.3);
  box-shadow:var(--glow-blue);
}
.hot-badge {
  position:absolute; top:20px; right:20px;
  font-size:.65rem; font-weight:700;
  background:var(--grad-primary); color:#fff;
  padding:3px 12px; border-radius:var(--r-pill);
  text-transform:uppercase; letter-spacing:.06em;
}
.plan-name  { font-family:var(--font-display); font-size:1.25rem; font-weight:700; color:var(--text-primary); margin-bottom:8px; }
.plan-price { display:flex; align-items:baseline; gap:2px; margin-bottom:8px; }
.plan-cur   { font-size:1.25rem; font-weight:700; color:var(--text-primary); align-self:flex-start; margin-top:8px; }
.plan-num   { font-family:var(--font-display); font-size:3rem; font-weight:800; color:var(--text-primary); line-height:1; }
.plan-per   { font-size:.875rem; color:var(--text-muted); margin-left:4px; }
.plan-desc  { font-size:.875rem; color:var(--text-secondary); margin-bottom:22px; line-height:1.55; }
.plan-line  { height:1px; background:var(--border-subtle); margin-bottom:22px; }
.plan-feats { display:flex; flex-direction:column; gap:12px; margin-bottom:30px; }
.plan-feat  { display:flex; align-items:center; gap:12px; font-size:.875rem; }
.pf-on      { color:var(--text-secondary); }
.pf-off     { color:var(--text-muted); }
.pf-check   { color:var(--green); flex-shrink:0; }
.pf-x       { color:var(--text-muted); flex-shrink:0; }

/* ============================================================
   CTA SECTION
   ============================================================ */
.cta-card {
  background:linear-gradient(135deg,rgba(59,130,246,.1),rgba(139,92,246,.1));
  border:1px solid rgba(139,92,246,.22);
  border-radius:var(--r-2xl);
  padding:88px 60px;
  text-align:center;
  position:relative; overflow:hidden;
  max-width:920px; margin:0 auto;
}
.cta-h  {
  font-family:var(--font-display);
  font-size:clamp(2rem,4.5vw,3.25rem);
  font-weight:800; letter-spacing:-.04em;
  line-height:1.12; color:var(--text-primary); margin-bottom:20px;
}
.cta-p  { font-size:1.0625rem; color:var(--text-secondary); margin-bottom:36px; line-height:1.75; }
.cta-note {
  margin-top:22px; font-size:.875rem; color:var(--text-muted);
  display:flex; align-items:center; justify-content:center; flex-wrap:wrap; gap:22px;
}
.cta-note-item { display:flex; align-items:center; gap:7px; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background:var(--bg-surface);
  border-top:1px solid var(--border-subtle);
  padding:72px 0 32px;
}
.footer-grid {
  display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:48px; margin-bottom:56px;
}
.footer-about p { font-size:.9375rem; color:var(--text-muted); line-height:1.65; margin-top:16px; max-width:260px; }
.footer-col-title{ font-family:var(--font-display); font-size:.875rem; font-weight:700; color:var(--text-primary); margin-bottom:18px; }
.footer-links { display:flex; flex-direction:column; gap:12px; }
.footer-link  { font-size:.9375rem; color:var(--text-muted); transition:color .2s; }
.footer-link:hover { color:var(--text-primary); }

.socials { display:flex; gap:10px; margin-top:20px; }
.social-link {
  width:36px; height:36px;
  background:var(--bg-elevated); border:1px solid var(--border-card);
  border-radius:var(--r-md); display:flex; align-items:center; justify-content:center;
  color:var(--text-muted); transition:all .2s;
}
.social-link:hover { background:var(--grad-primary); border-color:transparent; color:#fff; }

.footer-bottom {
  border-top:1px solid var(--border-subtle);
  padding-top:28px; display:flex;
  justify-content:space-between; align-items:center;
}
.footer-copy  { font-size:.875rem; color:var(--text-muted); }
.footer-heart { display:flex; align-items:center; gap:7px; font-size:.8125rem; color:var(--text-muted); }

/* ============================================================
   KEYFRAME ANIMATIONS
   ============================================================ */
@keyframes spin     { to { transform:rotate(360deg); } }
@keyframes iconPulse{ 0%,100%{box-shadow:0 0 28px rgba(59,130,246,.5)} 50%{box-shadow:0 0 60px rgba(59,130,246,.8),0 0 20px rgba(139,92,246,.5)} }
@keyframes progFill { to { width:100%; } }
@keyframes ptFloat  { 0%,100%{transform:translate(0,0) scale(1);opacity:.4} 50%{transform:translate(var(--tx,20px),var(--ty,-30px)) scale(1.6);opacity:.85} }
@keyframes blink    { 0%,100%{opacity:1} 50%{opacity:.4} }
@keyframes orbDrift { 0%,100%{transform:translate(0,0)} 33%{transform:translate(28px,-18px)} 66%{transform:translate(-18px,18px)} }
@keyframes fadeUp   { from{opacity:0;transform:translateY(28px)} to{opacity:1;transform:translateY(0)} }

.fade-up { animation:fadeUp .7s var(--ease) both; }
.d1{animation-delay:.1s} .d2{animation-delay:.2s} .d3{animation-delay:.3s}
.d4{animation-delay:.4s} .d5{animation-delay:.5s} .d6{animation-delay:.6s}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media(max-width:1200px){
  .feat-grid   { grid-template-columns:repeat(2,1fr); }
  .subj-grid   { grid-template-columns:repeat(4,1fr); }
  .footer-grid { grid-template-columns:1fr 1fr; gap:36px; }
}
@media(max-width:1024px){
  .ai-split { grid-template-columns:1fr; gap:48px; }
  .stats-inner { grid-template-columns:repeat(2,1fr); }
  .stat:nth-child(2)::after { display:none; }
}
@media(max-width:768px){
  :root{ --nav-h:64px; }
  .nav-links,.nav-actions .btn-ghost { display:none; }
  .nav-hamburger { display:flex; }
  .hero-cards { grid-template-columns:1fr; max-width:380px; }
  .feat-grid { grid-template-columns:1fr; }
  .subj-grid { grid-template-columns:repeat(2,1fr); }
  .testi-grid { grid-template-columns:1fr; }
  .price-grid { grid-template-columns:1fr; max-width:420px; }
  .price-card--hot { transform:none; }
  .footer-grid { grid-template-columns:1fr; }
  .footer-bottom { flex-direction:column; gap:14px; text-align:center; }
  .cta-card { padding:56px 28px; }
  .hero-ctas { flex-direction:column; align-items:stretch; max-width:340px; margin-left:auto; margin-right:auto; }
  .btn-lg { justify-content:center; }
}
@media(max-width:480px){
  .stats-inner { grid-template-columns:repeat(2,1fr); }
  .stat::after { display:none; }
  .billing-pill { flex-direction:row; }
}