/* ==========================================================================
   AI NATIVE HUB — MULTILINGUAL LUXURY TECH / CYBER DESIGN SYSTEM
   Inspired by Trinity Blueprint • Deep Space Void, Neon Accents, Glassmorphism
   Optimized for iOS (iPhone) & Android + Multilingual (VI / EN / ZH)
   ========================================================================== */

:root {
  /* Core Void Palette */
  --void: #040712;
  --void2: #070B1A;
  --surface: #0B1020;
  --surface2: #111731;
  --surface-glass: rgba(15, 23, 42, 0.8);
  --surface-card: rgba(255, 255, 255, 0.04);
  --surface-hover: rgba(255, 255, 255, 0.08);

  /* Lines & Borders */
  --line: rgba(255, 255, 255, 0.08);
  --line2: rgba(255, 255, 255, 0.15);
  --line-gold: rgba(250, 204, 21, 0.28);
  --line-emerald: rgba(16, 185, 129, 0.28);
  --line-cyan: rgba(34, 211, 238, 0.28);

  /* Luminous Accents */
  --gold: #FACC15;
  --gold2: #F59E0B;
  --gold-glow: rgba(250, 204, 21, 0.25);

  --emerald: #10B981;
  --emerald2: #34D399;
  --emerald-glow: rgba(16, 185, 129, 0.25);

  --cyan: #22D3EE;
  --cyan2: #38BDF8;
  --cyan-glow: rgba(34, 211, 238, 0.25);

  --danger: #F43F5E;
  --danger2: #FB7185;
  --danger-glow: rgba(244, 63, 94, 0.25);

  --violet: #A78BFA;

  /* Typography Colors */
  --text: #F8FAFC;
  --text-dim: #E2E8F0;
  --muted: #94A3B8;
  --dim: #64748B;

  /* Fonts */
  --font-main: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-heading: 'Space Grotesk', var(--font-main);
  --font-serif: 'Instrument Serif', Georgia, serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Transitions */
  --ease: cubic-bezier(.16, 1, .3, 1);
  --ease2: cubic-bezier(.22, 1, .36, 1);

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  --max-w: 1200px;

  /* Safe Area for iPhone */
  --sat: env(safe-area-inset-top, 0px);
  --sab: env(safe-area-inset-bottom, 0px);
}

/* Base Reset */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  background-color: var(--void);
}

body {
  font-family: var(--font-main);
  background-color: var(--void);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  padding-bottom: calc(70px + var(--sab));
}

@media (min-width: 768px) {
  body {
    padding-bottom: 0;
  }
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

::selection {
  background: rgba(250, 204, 21, 0.35);
  color: #FFFFFF;
}

/* ==========================================================================
   MULTILINGUAL SWITCHER SYSTEM (VI / EN / ZH)
   ========================================================================== */
.vi, .en, .zh { display: none; }
html[lang="vi"] .vi { display: inline; }
html[lang="vi"] div.vi, html[lang="vi"] p.vi, html[lang="vi"] h1.vi, html[lang="vi"] h2.vi, html[lang="vi"] h3.vi, html[lang="vi"] h4.vi, html[lang="vi"] li.vi, html[lang="vi"] span.vi-block { display: block; }
html[lang="vi"] span.vi-inline { display: inline; }

html[lang="en"] .en { display: inline; }
html[lang="en"] div.en, html[lang="en"] p.en, html[lang="en"] h1.en, html[lang="en"] h2.en, html[lang="en"] h3.en, html[lang="en"] h4.en, html[lang="en"] li.en, html[lang="en"] span.en-block { display: block; }
html[lang="en"] span.en-inline { display: inline; }

html[lang="zh"] .zh { display: inline; }
html[lang="zh"] div.zh, html[lang="zh"] p.zh, html[lang="zh"] h1.zh, html[lang="zh"] h2.zh, html[lang="zh"] h3.zh, html[lang="zh"] h4.zh, html[lang="zh"] li.zh, html[lang="zh"] span.zh-block { display: block; }
html[lang="zh"] span.zh-inline { display: inline; }

/* Scroll Progress Bar */
#progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2.5px;
  width: 0;
  background: linear-gradient(90deg, var(--emerald), var(--gold), var(--cyan));
  z-index: 9999;
  transition: width 0.1s linear;
}

/* Background Texture Noise */
.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.035;
  z-index: 1;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
}

/* Container */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 2;
}

@media (min-width: 640px) {
  .container {
    padding: 0 28px;
  }
}

/* ==========================================================================
   NAVIGATION
   ========================================================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 900;
  backdrop-filter: blur(24px) saturate(1.6);
  -webkit-backdrop-filter: blur(24px) saturate(1.6);
  background: rgba(4, 7, 18, 0.85);
  border-bottom: 1px solid var(--line);
  transition: transform 0.4s var(--ease);
}

.nav-inner {
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

@media (min-width: 900px) {
  .nav-inner {
    height: 72px;
  }
}

.brand {
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: 0.12em;
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(250, 204, 21, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  box-shadow: 0 4px 18px rgba(250, 204, 21, 0.2);
  transition: transform 0.3s var(--ease), border-color 0.3s, box-shadow 0.3s;
  backdrop-filter: blur(10px);
  flex-shrink: 0;
}

.brand:hover .brand-mark {
  transform: scale(1.08) rotate(3deg);
  border-color: var(--cyan);
  box-shadow: 0 6px 24px rgba(34, 211, 238, 0.35);
}

.brand-mark .nexus-svg {
  width: 28px;
  height: 28px;
  display: block;
  transition: transform 0.4s var(--ease);
}

.brand:hover .brand-mark .nexus-svg {
  transform: rotate(-6deg);
}

.brand-text strong {
  color: var(--gold);
}

.nav-links {
  display: none;
  gap: 6px;
  align-items: center;
}

@media (min-width: 1024px) {
  .nav-links {
    display: flex;
  }
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 8px 12px;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  transition: 0.25s var(--ease);
}

.nav-links a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--line);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Language Switcher Pill Group */
.lang-switcher {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
  padding: 3px;
}

.lang-btn {
  border: none;
  background: transparent;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 5px 9px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: 0.2s;
}

.lang-btn.active {
  background: #FFFFFF;
  color: var(--void);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.btn-nav-zalo {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  background: rgba(34, 211, 238, 0.1);
  color: var(--cyan);
  border: 1px solid rgba(34, 211, 238, 0.3);
  display: none;
  align-items: center;
  gap: 6px;
  transition: 0.2s;
}

@media (min-width: 640px) {
  .btn-nav-zalo {
    display: inline-flex;
  }
}

.btn-nav-zalo:hover {
  background: rgba(34, 211, 238, 0.2);
  transform: translateY(-1px);
}

.btn-nav-cta {
  font-family: var(--font-main);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  background: #FFFFFF;
  color: var(--void);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: 0.2s;
  box-shadow: 0 4px 16px rgba(255, 255, 255, 0.2);
}

.btn-nav-cta:hover {
  transform: translateY(-1px);
  background: #F1F5F9;
}

/* Hamburger for Mobile Drawer */
.hamburger {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  cursor: pointer;
}

@media (min-width: 1024px) {
  .hamburger {
    display: none;
  }
}

.hamburger i, .hamburger i::before, .hamburger i::after {
  content: '';
  display: block;
  width: 16px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: 0.3s var(--ease);
  position: relative;
}

.hamburger i::before { position: absolute; top: -5px; }
.hamburger i::after { position: absolute; top: 5px; }
.hamburger.open i { background: transparent; }
.hamburger.open i::before { transform: rotate(45deg); top: 0; }
.hamburger.open i::after { transform: rotate(-45deg); top: 0; }

/* Mobile Drawer */
.drawer {
  position: fixed;
  inset: 0;
  z-index: 899;
  background: rgba(4, 7, 18, 0.95);
  backdrop-filter: blur(28px);
  display: flex;
  flex-direction: column;
  padding: 88px 24px 32px;
  opacity: 0;
  visibility: hidden;
  transition: 0.35s var(--ease);
}

.drawer.open {
  opacity: 1;
  visibility: visible;
}

.drawer a {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.drawer a:hover, .drawer a.active {
  color: var(--gold);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 110px 0 60px;
  overflow: hidden;
  isolation: isolate;
  background: radial-gradient(900px 600px at 20% 10%, rgba(16, 185, 129, 0.14), transparent 60%),
              radial-gradient(900px 700px at 85% 20%, rgba(34, 211, 238, 0.12), transparent 60%),
              radial-gradient(800px 500px at 50% 90%, rgba(250, 204, 21, 0.08), transparent 60%),
              linear-gradient(180deg, #050713 0%, #060A18 45%, #080D1F 100%);
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.18;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, black 50%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, black 50%, transparent 80%);
  background-size: 64px 64px;
  background-image: linear-gradient(to right, rgba(255, 255, 255, 0.08) 1px, transparent 1px),
                    linear-gradient(to bottom, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.45;
  mix-blend-mode: screen;
  pointer-events: none;
  animation: floatOrb 18s ease-in-out infinite;
}

.orb1 {
  width: 480px;
  height: 480px;
  left: -100px;
  top: 10%;
  background: radial-gradient(circle, #10B981 0%, transparent 70%);
}

.orb2 {
  width: 580px;
  height: 580px;
  right: -150px;
  top: -5%;
  background: radial-gradient(circle, #22D3EE 0%, transparent 70%);
  animation-delay: -6s;
}

@keyframes floatOrb {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(14px, -20px, 0) scale(1.06); }
}

.hero-top {
  text-align: center;
  display: grid;
  gap: 18px;
  justify-items: center;
  max-width: 960px;
  margin: 0 auto 36px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
  backdrop-filter: blur(14px);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.eyebrow i.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 5px rgba(250, 204, 21, 0.2);
  display: inline-block;
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0%, 100% { box-shadow: 0 0 0 5px rgba(250, 204, 21, 0.2); }
  50% { box-shadow: 0 0 0 10px rgba(250, 204, 21, 0); }
}

.hero h1 {
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
  font-size: clamp(2.1rem, 5.8vw, 4.2rem);
}

.hero h1 .danger-strike {
  color: var(--danger2);
  position: relative;
  display: inline-block;
}

.hero h1 .grad-gold {
  background: linear-gradient(100deg, #FFFFFF 15%, #FEF08A 40%, #FACC15 60%, #F59E0B 80%, #FFFFFF 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% auto;
  animation: shimmerGrad 6s linear infinite;
}

@keyframes shimmerGrad {
  to { background-position: 200% center; }
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-dim);
  max-width: 780px;
  line-height: 1.7;
}

.hero-subtitle strong {
  color: #FFFFFF;
}

.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.pill {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 6px 12px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.pill.gold { color: var(--gold); border-color: var(--line-gold); background: rgba(250, 204, 21, 0.07); }
.pill.em { color: var(--emerald2); border-color: var(--line-emerald); background: rgba(16, 185, 129, 0.07); }
.pill.cy { color: var(--cyan); border-color: var(--line-cyan); background: rgba(34, 211, 238, 0.07); }

/* Parent Reassurance Quote Banner */
.hero-quote {
  max-width: 820px;
  margin: 0 auto 36px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  backdrop-filter: blur(16px);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.q-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--gold), var(--gold2));
  color: var(--void);
  display: grid;
  place-items: center;
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-style: italic;
  font-weight: 700;
  flex-shrink: 0;
}

.quote-text {
  font-size: 0.92rem;
  line-height: 1.6;
  color: #CBD5E1;
  font-style: italic;
}

.quote-text strong {
  color: #FFFFFF;
}

/* ==========================================================================
   HERO VISUAL MEDIA + FLYWHEEL SECTION
   ========================================================================== */
.hero-visual {
  display: grid;
  gap: 20px;
}

@media (min-width: 980px) {
  .hero-visual {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: stretch;
  }
}

/* Hero Media Image Card */
.hero-media-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  background: #0B1020;
  display: flex;
  flex-direction: column;
}

.hero-media-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}

.hero-media-card:hover img {
  transform: scale(1.03);
}

.hero-media-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 35%, rgba(4, 7, 18, 0.88) 100%);
  pointer-events: none;
}

.hero-media-caption {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 16px;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 12px;
}

.media-hud-tag {
  backdrop-filter: blur(14px);
  background: rgba(11, 16, 32, 0.85);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
}

.media-hud-tag strong {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  color: #FFFFFF;
  display: block;
}

.media-hud-tag span {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Interactive Flywheel Center */
.trinity-stage {
  position: relative;
  min-height: 420px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--line);
  backdrop-filter: blur(18px);
  display: grid;
  place-items: center;
  padding: 20px;
  isolation: isolate;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
}

.stage-grid {
  position: absolute;
  inset: 0;
  opacity: 0.15;
  background-image: radial-gradient(circle at 1px 1px, rgba(255, 255, 255, 0.6) 1px, transparent 0);
  background-size: 24px 24px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, black, transparent 78%);
}

.stage-glow {
  position: absolute;
  inset: auto;
  pointer-events: none;
}

.stage-glow::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  width: 460px;
  height: 460px;
  transform: translate(-50%, -50%);
  background: conic-gradient(from 0deg, rgba(250, 204, 21, 0.15), rgba(16, 185, 129, 0.15), rgba(34, 211, 238, 0.15), rgba(250, 204, 21, 0.15));
  filter: blur(45px);
  border-radius: 50%;
  animation: spinGlow 24s linear infinite;
}

@keyframes spinGlow {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

.tri-engine {
  position: relative;
  width: min(320px, 80vw);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
}

.tri-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
}

.tri-center {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: radial-gradient(120px at 30% 20%, #FFFFFF, #FEF3C7 40%, #FACC15 68%, #F59E0B 100%);
  display: grid;
  place-items: center;
  box-shadow: 0 12px 36px rgba(250, 204, 21, 0.4), inset 0 1px 2px rgba(255, 255, 255, 0.9);
  z-index: 2;
  border: 1px solid rgba(255, 255, 255, 0.7);
  text-align: center;
}

.tri-center small {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.52rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(15, 23, 42, 0.7);
}

.tri-center strong {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.03em;
  color: #0F172A;
  line-height: 1;
}

.tri-center span {
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(15, 23, 42, 0.8);
}

.node {
  position: absolute;
  width: 100px;
  display: grid;
  justify-items: center;
  gap: 6px;
  z-index: 2;
}

.node-card {
  width: 100%;
  background: rgba(11, 16, 32, 0.85);
  backdrop-filter: blur(16px);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 8px 6px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  transition: 0.3s var(--ease);
}

.node:hover .node-card {
  transform: translateY(-3px) scale(1.02);
  border-color: rgba(255, 255, 255, 0.2);
}

.node-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-size: 0.85rem;
  margin: 0 auto 4px;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.node.a .node-icon { background: linear-gradient(135deg, #FACC15, #F59E0B); color: #1a1200; }
.node.b .node-icon { background: linear-gradient(135deg, #22D3EE, #0EA5E9); color: #04202a; }
.node.c .node-icon { background: linear-gradient(135deg, #10B981, #059669); color: #FFFFFF; }

.node kbd {
  font-family: var(--font-mono);
  font-size: 0.54rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 2px 5px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.06);
  color: var(--muted);
  display: inline-block;
  margin-bottom: 2px;
}

.node h4 {
  font-family: var(--font-heading);
  font-size: 0.74rem;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.2;
}

.node.a { left: 50%; top: 0; transform: translate(-50%, 0); }
.node.b { left: 0%; bottom: 4%; }
.node.c { right: 0%; bottom: 4%; }

.ticker {
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 10px;
  display: flex;
  overflow: hidden;
  padding: 6px;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--line);
  backdrop-filter: blur(12px);
  border-radius: 10px;
}

.ticker-track {
  display: flex;
  gap: 10px;
  animation: marquee 22s linear infinite;
  white-space: nowrap;
}

@keyframes marquee {
  to { transform: translateX(-50%); }
}

.chip {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 8px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line);
  color: #E2E8F0;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.chip i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
}

/* Side Card of Hero */
.hero-side {
  display: grid;
  gap: 16px;
}

.side-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  backdrop-filter: blur(16px);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
  position: relative;
  overflow: hidden;
}

.side-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(500px 200px at 80% 0%, rgba(250, 204, 21, 0.08), transparent 70%);
  pointer-events: none;
}

.side-card h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.side-card h3 i {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: rgba(250, 204, 21, 0.12);
  color: var(--gold);
  display: grid;
  place-items: center;
  font-size: 0.85rem;
  border: 1px solid var(--line-gold);
}

.side-card p {
  color: #CBD5E1;
  font-size: 0.88rem;
  line-height: 1.65;
}

.side-card ul {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.side-card li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 0.85rem;
  color: #E2E8F0;
}

.side-card li::before {
  content: '↗';
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--gold);
  flex-shrink: 0;
}

.cta-row {
  display: flex;
  gap: 10px;
  margin-top: 18px;
  flex-wrap: wrap;
}

.btn {
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 0.88rem;
  padding: 12px 20px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  transition: all 0.25s var(--ease);
  border: 1px solid transparent;
  text-decoration: none;
  min-height: 44px;
}

.btn-primary {
  background: #FFFFFF;
  color: var(--void);
  box-shadow: 0 8px 24px rgba(255, 255, 255, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  background: #F8FAFC;
  box-shadow: 0 12px 32px rgba(255, 255, 255, 0.35);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
  color: #FFFFFF;
  backdrop-filter: blur(8px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* ==========================================================================
   SECTION HEADERS
   ========================================================================== */
.section {
  position: relative;
  padding: 70px 0;
  border-top: 1px solid var(--line);
}

@media (min-width: 860px) {
  .section {
    padding: 95px 0;
  }
}

.sec-head {
  max-width: 760px;
  margin: 0 auto 45px;
  text-align: center;
  display: grid;
  gap: 12px;
  justify-items: center;
}

.k-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  background: rgba(250, 204, 21, 0.08);
  border: 1px solid var(--line-gold);
}

.k-label::before, .k-label::after {
  content: '';
  width: 18px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(250, 204, 21, 0.5));
}

.sec-head h2 {
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.18;
  font-size: clamp(1.7rem, 4.2vw, 2.7rem);
}

.sec-head h2 em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: #FEF08A;
}

.sec-head p {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* ==========================================================================
   OBJECTIONS: 2 PARENT FEARS
   ========================================================================== */
.objections-section {
  background: linear-gradient(180deg, #070B1A 0%, #040712 100%);
}

.objection-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 800px) {
  .objection-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.o-card {
  position: relative;
  border-radius: var(--radius-lg);
  padding: 26px 22px;
  background: rgba(11, 16, 32, 0.75);
  border: 1px solid var(--line);
  overflow: hidden;
  backdrop-filter: blur(14px);
  transition: transform 0.3s var(--ease), border-color 0.3s ease;
}

.o-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.16);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.4);
}

.o-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  background: rgba(244, 63, 94, 0.12);
  color: var(--danger2);
  border: 1px solid rgba(244, 63, 94, 0.25);
}

.o-fear {
  font-family: var(--font-heading);
  font-size: 1.18rem;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.4;
  margin-bottom: 16px;
}

.o-divider {
  height: 1px;
  background: var(--line);
  margin: 16px 0;
}

.o-solution-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.o-solution-header i {
  color: var(--emerald2);
  font-size: 1.1rem;
}

.o-solution-header h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--emerald2);
}

.o-solution p {
  font-size: 0.88rem;
  color: #CBD5E1;
  line-height: 1.65;
}

.o-solution ul {
  margin-top: 12px;
  display: grid;
  gap: 6px;
}

.o-solution li {
  font-size: 0.84rem;
  color: #CBD5E1;
  display: flex;
  gap: 8px;
}

.o-solution li::before {
  content: '✓';
  color: var(--emerald2);
  font-weight: bold;
}

/* ==========================================================================
   DELIVERABLES SHOWCASE WITH IMAGE
   ========================================================================== */
.showcase-banner {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: #0B1020;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  margin-bottom: 36px;
}

.showcase-banner img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}

.showcase-banner:hover img {
  transform: scale(1.02);
}

.showcase-grid-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 768px) {
  .showcase-grid-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.sc-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 20px;
  backdrop-filter: blur(12px);
}

.sc-card h4 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  color: #FFFFFF;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sc-card h4 i {
  color: var(--gold);
}

.sc-card p {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.6;
}

/* ==========================================================================
   4 PILLARS
   ========================================================================== */
.pillars-section {
  background: linear-gradient(180deg, #040712 0%, #070B1A 100%);
}

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

@media (min-width: 640px) {
  .pillars-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .pillars-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.p-card {
  position: relative;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 24px 18px;
  overflow: hidden;
  backdrop-filter: blur(12px);
  transition: 0.3s var(--ease);
  display: flex;
  flex-direction: column;
}

.p-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.16);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
}

.p-card.gold { --glow: var(--gold-glow); }
.p-card.cy { --glow: var(--cyan-glow); }
.p-card.em { --glow: var(--emerald-glow); }
.p-card.vt { --glow: rgba(167, 139, 250, 0.22); }

.p-card::after {
  content: '';
  position: absolute;
  inset: auto -20% -30% -20%;
  height: 160px;
  background: radial-gradient(300px 140px at 50% 0%, var(--glow), transparent 70%);
  opacity: 0;
  transition: 0.35s;
  pointer-events: none;
}

.p-card:hover::after {
  opacity: 1;
}

.p-icon-box {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 1.15rem;
  margin-bottom: 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.p-card.gold .p-icon-box { background: rgba(250, 204, 21, 0.12); color: var(--gold); }
.p-card.cy .p-icon-box { background: rgba(34, 211, 238, 0.12); color: var(--cyan); }
.p-card.em .p-icon-box { background: rgba(16, 185, 129, 0.12); color: var(--emerald2); }
.p-card.vt .p-icon-box { background: rgba(167, 139, 250, 0.12); color: var(--violet); }

.p-card h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 4px;
}

.p-card .p-tag {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 10px;
  color: var(--gold);
}

.p-card.cy .p-tag { color: var(--cyan); }
.p-card.em .p-tag { color: var(--emerald2); }
.p-card.vt .p-tag { color: var(--violet); }

.p-card p {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.6;
}

/* ==========================================================================
   COMPARISON MATRIX TABLE
   ========================================================================== */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(14px);
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

th {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-align: left;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

th.th-mass {
  color: var(--muted);
  background: rgba(255, 255, 255, 0.02);
}

th.th-bespoke {
  color: var(--gold);
  background: rgba(250, 204, 21, 0.08);
}

td {
  padding: 14px 18px;
  font-size: 0.88rem;
  color: #CBD5E1;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  vertical-align: middle;
  line-height: 1.55;
}

td strong {
  color: #FFFFFF;
}

td.td-bespoke {
  background: rgba(250, 204, 21, 0.03);
  color: #FEF08A;
  font-weight: 600;
}

/* ==========================================================================
   PACKAGES / TIERS
   ========================================================================== */
.packages-section {
  background: linear-gradient(180deg, #070B1A 0%, #040712 100%);
}

.packages-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  align-items: stretch;
}

@media (min-width: 900px) {
  .packages-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pkg-card {
  background: rgba(11, 16, 32, 0.75);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.35);
  display: flex;
  flex-direction: column;
  position: relative;
  backdrop-filter: blur(14px);
  transition: transform 0.3s var(--ease);
}

.pkg-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.16);
}

.pkg-card.popular {
  border: 1.5px solid var(--gold);
  box-shadow: 0 24px 64px rgba(250, 204, 21, 0.18);
}

.pkg-ribbon {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--gold), var(--gold2));
  color: var(--void);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.pkg-head {
  text-align: center;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 18px;
}

.pkg-dur {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold);
  background: rgba(250, 204, 21, 0.1);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: 8px;
}

.pkg-name {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 4px;
}

.pkg-desc {
  font-size: 0.82rem;
  color: var(--muted);
}

.pkg-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex-grow: 1;
  margin-bottom: 26px;
}

.pkg-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.85rem;
  color: #CBD5E1;
  line-height: 1.45;
}

.pkg-item i {
  color: var(--emerald2);
  margin-top: 3px;
  flex-shrink: 0;
}

.pkg-item strong {
  color: #FFFFFF;
}

.pkg-footer .btn {
  width: 100%;
}

/* ==========================================================================
   FAQ ACCORDION
   ========================================================================== */
.faq-wrap {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.faq-q {
  width: 100%;
  padding: 18px 20px;
  background: transparent;
  border: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-align: left;
  font-family: var(--font-heading);
  font-size: 0.98rem;
  font-weight: 700;
  color: #FFFFFF;
  cursor: pointer;
  gap: 14px;
}

.faq-arr {
  color: var(--muted);
  transition: transform 0.3s var(--ease);
  flex-shrink: 0;
}

.faq-item.active .faq-arr {
  transform: rotate(180deg);
  color: var(--gold);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s var(--ease), padding 0.35s ease;
  padding: 0 20px;
  background: rgba(0, 0, 0, 0.2);
}

.faq-item.active .faq-a {
  max-height: 350px;
  padding: 0 20px 20px;
}

.faq-a p {
  font-size: 0.88rem;
  color: #CBD5E1;
  line-height: 1.7;
}

/* ==========================================================================
   REGISTER / DISCOVERY CALL
   ========================================================================== */
.register-section {
  background: radial-gradient(800px 400px at 50% 0%, rgba(250, 204, 21, 0.08), transparent 70%),
              linear-gradient(180deg, #050713 0%, #070B1A 100%);
  padding: 80px 0;
}

.register-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
}

@media (min-width: 900px) {
  .register-grid {
    grid-template-columns: 1.05fr 0.95fr;
  }
}

.reg-info h2 {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 14px;
}

.reg-info p {
  color: #CBD5E1;
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.reg-perks {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.r-perk {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  color: #E2E8F0;
}

.r-perk i {
  color: var(--emerald2);
  margin-top: 4px;
}

/* Lead Mentor Identity & QR Badge */
.mentor-card {
  margin-top: 28px;
  padding: 24px 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line2);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 22px;
  backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.35);
}

@media (min-width: 640px) {
  .mentor-card {
    flex-direction: row;
    align-items: center;
    text-align: left;
    gap: 26px;
    padding: 28px 24px;
  }
}

.mentor-qr-wrap {
  width: 220px;
  max-width: 80vw;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 2px solid rgba(34, 211, 238, 0.5);
  background: #FFFFFF;
  padding: 10px;
  box-shadow: 0 16px 40px rgba(34, 211, 238, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s var(--ease), box-shadow 0.3s, border-color 0.3s;
  cursor: pointer;
  text-decoration: none;
  flex-shrink: 0;
}

@media (min-width: 640px) {
  .mentor-qr-wrap {
    width: 200px;
  }
}

@media (min-width: 1024px) {
  .mentor-qr-wrap {
    width: 220px;
  }
}

.mentor-qr-wrap:hover {
  transform: translateY(-3px) scale(1.03);
  border-color: var(--cyan);
  box-shadow: 0 20px 50px rgba(34, 211, 238, 0.45);
}

.mentor-qr-wrap img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
  border-radius: 4px;
}

.mentor-info {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: center;
}

@media (min-width: 640px) {
  .mentor-info {
    align-items: flex-start;
  }
}

.mentor-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.mentor-badge i {
  color: var(--gold);
}

.mentor-name {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  color: #FFFFFF;
  display: flex;
  align-items: center;
  gap: 8px;
}

.mentor-name .verified-check {
  color: var(--cyan);
  font-size: 0.95rem;
}

.mentor-role {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.5;
}

.mentor-hint {
  font-size: 0.78rem;
  color: var(--cyan);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
  background: rgba(34, 211, 238, 0.08);
  padding: 5px 12px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(34, 211, 238, 0.25);
  font-weight: 600;
}

.reg-card {
  background: rgba(11, 16, 32, 0.85);
  border: 1px solid var(--line2);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(20px);
}

.reg-card h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 8px;
  text-align: center;
}

.reg-card-sub {
  font-size: 0.82rem;
  color: var(--muted);
  text-align: center;
  margin-bottom: 20px;
  line-height: 1.5;
}

.direct-actions-box {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 22px;
}

.btn-gform {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 18px;
  background: linear-gradient(135deg, #FACC15, #EAB308);
  color: #040712;
  font-weight: 800;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 24px rgba(250, 204, 21, 0.25);
  transition: transform 0.2s, box-shadow 0.2s;
  text-align: center;
}

.btn-gform:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(250, 204, 21, 0.4);
}

.btn-zalo-big {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 18px;
  background: rgba(34, 211, 238, 0.08);
  color: var(--cyan);
  border: 1px solid rgba(34, 211, 238, 0.35);
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

.btn-zalo-big:hover {
  background: rgba(34, 211, 238, 0.16);
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.or-divider {
  display: flex;
  align-items: center;
  text-align: center;
  color: var(--dim);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  margin: 18px 0 14px;
}

.or-divider::before,
.or-divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.or-divider:not(:empty)::before {
  margin-right: .75em;
}

.or-divider:not(:empty)::after {
  margin-left: .75em;
}

.reg-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.f-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.f-group label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
}

/* 16px font on inputs prevents iOS auto-zoom */
.f-group input,
.f-group select,
.f-group textarea {
  font-family: var(--font-main);
  font-size: 16px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  color: #FFFFFF;
  outline: none;
  transition: 0.2s;
  min-height: 44px;
}

.f-group input:focus,
.f-group select:focus,
.f-group textarea:focus {
  border-color: var(--gold);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 0 3px rgba(250, 204, 21, 0.15);
}

.f-group select option {
  background: #0B1020;
  color: #FFFFFF;
}

.btn-submit {
  width: 100%;
  padding: 14px;
  font-size: 0.92rem;
  font-weight: 700;
  background: linear-gradient(135deg, #FFFFFF, #E2E8F0);
  color: var(--void);
  box-shadow: 0 8px 24px rgba(255, 255, 255, 0.2);
  margin-top: 6px;
}

.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(255, 255, 255, 0.3);
}

.f-note {
  font-size: 0.72rem;
  color: var(--muted);
  text-align: center;
  margin-top: 8px;
  line-height: 1.5;
}

.reg-success {
  text-align: center;
  padding: 30px 10px;
}

.reg-success.hidden {
  display: none;
}

.reg-success i {
  font-size: 2.8rem;
  color: var(--emerald2);
  margin-bottom: 14px;
}

.reg-success h4 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.reg-success p {
  color: var(--muted);
  font-size: 0.9rem;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  background: #02040A;
  border-top: 1px solid var(--line);
  padding: 45px 0 20px;
  color: var(--dim);
  font-size: 0.82rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.footer-bottom {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  width: 100%;
}

/* ==========================================================================
   MOBILE STICKY BOTTOM BAR (iOS & Android)
   ========================================================================== */
.mobile-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: calc(58px + var(--sab));
  padding-bottom: var(--sab);
  background: rgba(4, 7, 18, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  padding-left: 14px;
  padding-right: 14px;
  gap: 10px;
  z-index: 950;
}

@media (min-width: 768px) {
  .mobile-bar {
    display: none;
  }
}

.m-btn {
  flex: 1;
  height: 42px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-main);
  font-size: 0.82rem;
  font-weight: 700;
  gap: 6px;
}

.m-zalo {
  background: rgba(34, 211, 238, 0.12);
  color: var(--cyan);
  border: 1px solid rgba(34, 211, 238, 0.3);
}

.m-cta {
  background: #FFFFFF;
  color: var(--void);
}