/* ============================================================
   Nyvexa — Website Design System
   Phong cách kế thừa từ launcher-tauri (dark glass / steam-like)
   ============================================================ */

:root {
  --bg-main: #0b0e14;
  --bg-nav: #161b22;
  --bg-card: #161b22;
  --bg-elevated: #1b212b;
  --glass-bg: rgba(22, 27, 34, 0.7);
  --glass-blur: blur(20px);
  --accent-blue: #3b82f6;
  --accent-blue-2: #2563eb;
  --accent-green: #10b981;
  --text-primary: #e6edf3;
  --text-secondary: #8f98a0;
  --line: rgba(255, 255, 255, 0.08);
  --radius-card: 14px;
  --radius-pill: 999px;
  --shadow-soft: 0 16px 40px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 0 1px rgba(59, 130, 246, 0.25), 0 18px 50px rgba(37, 99, 235, 0.25);
  --transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  --maxw: 1200px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "Inter", "Montserrat", "Segoe UI", "Noto Sans", Arial, sans-serif;
  color: var(--text-primary);
  background:
    radial-gradient(1200px 680px at 2% -8%, rgba(59, 130, 246, 0.18), transparent 60%),
    radial-gradient(900px 560px at 88% 6%, rgba(16, 185, 129, 0.1), transparent 58%),
    linear-gradient(180deg, #0b0e14 0%, #10151d 64%, #0b0e14 100%);
  background-attachment: fixed;
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: "Montserrat", "Inter", sans-serif;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

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

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

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Scrollbar ─────────────────────────────────────────────── */
* { scrollbar-width: thin; scrollbar-color: rgba(59,130,246,0.4) rgba(22,27,34,0.4); }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: rgba(22,27,34,0.4); }
::-webkit-scrollbar-thumb { background: rgba(59,130,246,0.35); border-radius: 6px; border: 2px solid rgba(11,14,20,0.6); }
::-webkit-scrollbar-thumb:hover { background: rgba(59,130,246,0.6); }

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: 70px;
  display: flex;
  align-items: center;
  background: rgba(13, 17, 23, 0.55);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(14px);
  transition: var(--transition);
}
.navbar.scrolled {
  height: 60px;
  background: rgba(13, 17, 23, 0.9);
  border-bottom-color: var(--line);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}
.nav-inner {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: "Montserrat", sans-serif;
  font-weight: 900;
  font-size: 22px;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.brand-logo {
  width: 38px; height: 38px;
  border-radius: 9px;
  object-fit: contain;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}
.brand:hover .brand-logo { transform: rotate(-8deg) scale(1.08); }
.brand-text { background: linear-gradient(90deg, #fff, #9fc4ff); -webkit-background-clip: text; background-clip: text; color: transparent; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
  list-style: none;
}
.nav-link {
  position: relative;
  padding: 9px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: var(--transition);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px; bottom: 4px;
  height: 2px;
  background: var(--accent-blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}
.nav-link:hover { color: #fff; background: rgba(255,255,255,0.05); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link.active { color: var(--accent-blue); }
.nav-link.active::after { transform: scaleX(1); }

.nav-cta { margin-left: 8px; }
.nav-mobile-cta { display: none; }

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 42px; height: 42px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: #fff;
  cursor: pointer;
  font-size: 20px;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  overflow: hidden;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(180deg, var(--accent-blue) 0%, var(--accent-blue-2) 100%);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.18);
  box-shadow: 0 10px 26px rgba(37, 99, 235, 0.35);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 16px 38px rgba(37, 99, 235, 0.5); filter: brightness(1.08); }
.btn-primary:active { transform: translateY(-1px); }
/* shimmer */
.btn-primary::before {
  content: "";
  position: absolute;
  top: 0; left: -120%;
  width: 60%; height: 100%;
  background: linear-gradient(120deg, transparent, rgba(255,255,255,0.35), transparent);
  transform: skewX(-20deg);
  transition: left 0.6s ease;
}
.btn-primary:hover::before { left: 140%; }

.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
  border-color: var(--line);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.1); transform: translateY(-3px); border-color: rgba(255,255,255,0.25); }

.btn-lg { padding: 16px 34px; font-size: 16px; }
.btn-block { width: 100%; }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  padding: 170px 0 110px;
  overflow: hidden;
}
.hero-glow {
  position: absolute;
  width: 600px; height: 600px;
  border-radius: 50%;
  filter: blur(110px);
  opacity: 0.5;
  pointer-events: none;
  animation: floatGlow 12s ease-in-out infinite;
}
.hero-glow.g1 { background: rgba(59,130,246,0.4); top: -120px; left: -100px; }
.hero-glow.g2 { background: rgba(16,185,129,0.28); bottom: -160px; right: -120px; animation-delay: -6s; }
@keyframes floatGlow {
  0%,100% { transform: translate(0,0) scale(1); }
  50% { transform: translate(40px, 30px) scale(1.12); }
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
  z-index: 2;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border-radius: var(--radius-pill);
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #9fc4ff;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 22px;
}
.eyebrow .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 0 0 rgba(16,185,129,0.6);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(16,185,129,0.6); }
  70% { box-shadow: 0 0 0 10px rgba(16,185,129,0); }
  100% { box-shadow: 0 0 0 0 rgba(16,185,129,0); }
}

.hero h1 {
  font-size: clamp(36px, 5vw, 62px);
  margin-bottom: 22px;
}
.hero h1 .grad {
  background: linear-gradient(100deg, #3b82f6 0%, #60a5fa 40%, #10b981 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p.lead {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: 34px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 38px; }

.hero-stats { display: flex; gap: 38px; flex-wrap: wrap; }
.stat .num {
  font-family: "Montserrat", sans-serif;
  font-size: 30px;
  font-weight: 900;
  background: linear-gradient(90deg, #fff, #9fc4ff);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat .label { font-size: 13px; color: var(--text-secondary); }

/* Hero mockup card */
.hero-visual { position: relative; }
.mock-window {
  position: relative;
  border-radius: 16px;
  background: linear-gradient(180deg, #1b232f 0%, #12181f 100%);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  transform: perspective(1200px) rotateY(-12deg) rotateX(6deg);
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
  animation: floatY 6s ease-in-out infinite;
}
.hero-visual:hover .mock-window { transform: perspective(1200px) rotateY(-4deg) rotateX(2deg) scale(1.02); }
@keyframes floatY { 0%,100% { translate: 0 0; } 50% { translate: 0 -14px; } }

.mock-titlebar {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 14px;
  background: var(--bg-nav);
  border-bottom: 1px solid var(--line);
}
.mock-dot { width: 11px; height: 11px; border-radius: 50%; }
.mock-dot.r { background: #ff5f57; }
.mock-dot.y { background: #febc2e; }
.mock-dot.g { background: #28c840; }
.mock-title { margin-left: 10px; font-size: 12px; color: var(--text-secondary); letter-spacing: 1px; }

.mock-body { padding: 18px; display: grid; grid-template-columns: 64px 1fr; gap: 16px; }
.mock-side { display: flex; flex-direction: column; gap: 12px; }
.mock-ico {
  width: 48px; height: 48px; border-radius: 12px;
  background: linear-gradient(135deg, #1e3a5f, #2563eb);
  border: 1px solid var(--line);
}
.mock-ico:nth-child(2) { background: linear-gradient(135deg, #14532d, #10b981); }
.mock-ico:nth-child(3) { background: linear-gradient(135deg, #312e81, #6366f1); }
.mock-main { display: flex; flex-direction: column; gap: 12px; }
.mock-banner {
  height: 130px; border-radius: 12px;
  background: linear-gradient(120deg, #1e3a5f, #2563eb 60%, #10b981);
  position: relative; overflow: hidden;
}
.mock-banner::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(120deg, transparent, rgba(255,255,255,0.25), transparent);
  transform: translateX(-100%);
  animation: sweep 3.5s ease-in-out infinite;
}
@keyframes sweep { 0%,60% { transform: translateX(-100%); } 100% { transform: translateX(100%); } }
.mock-row { display: grid; grid-template-columns: repeat(3,1fr); gap: 10px; }
.mock-tile { height: 70px; border-radius: 10px; background: var(--bg-elevated); border: 1px solid var(--line); }
.mock-line { height: 10px; border-radius: 6px; background: rgba(255,255,255,0.08); }
.mock-line.w60 { width: 60%; }
.mock-line.w40 { width: 40%; }

.floating-badge {
  position: absolute;
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow-soft);
  font-size: 13px; font-weight: 600;
  animation: floatY 5s ease-in-out infinite;
}
.floating-badge .fb-ico {
  width: 34px; height: 34px; border-radius: 9px;
  display: grid; place-items: center;
  background: rgba(16,185,129,0.15); color: var(--accent-green);
  font-size: 18px;
}
.floating-badge.fb1 { top: 24px; right: -28px; animation-delay: -1s; }
.floating-badge.fb2 { bottom: 30px; left: -34px; animation-delay: -3s; }
.floating-badge.fb2 .fb-ico { background: rgba(59,130,246,0.15); color: var(--accent-blue); }

/* ============================================================
   SECTIONS
   ============================================================ */
.section { padding: 90px 0; position: relative; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 56px; }
.section-head .eyebrow { margin-bottom: 16px; }
.section-head h2 { font-size: clamp(28px, 3.6vw, 42px); margin-bottom: 14px; }
.section-head p { color: var(--text-secondary); font-size: 16.5px; }

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.feature-card {
  position: relative;
  padding: 30px 26px;
  border-radius: var(--radius-card);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--line);
  transition: var(--transition);
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(400px 200px at var(--mx, 50%) var(--my, 0%), rgba(59,130,246,0.14), transparent 70%);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}
.feature-card:hover { transform: translateY(-8px); border-color: rgba(59,130,246,0.35); box-shadow: var(--shadow-glow); }
.feature-card:hover::before { opacity: 1; }
.feature-ico {
  width: 56px; height: 56px;
  border-radius: 14px;
  display: grid; place-items: center;
  font-size: 26px;
  margin-bottom: 18px;
  background: linear-gradient(135deg, rgba(59,130,246,0.18), rgba(16,185,129,0.14));
  border: 1px solid var(--line);
  transition: var(--transition);
}
.feature-card:hover .feature-ico { transform: scale(1.1) rotate(-6deg); }
.feature-card h3 { font-size: 19px; margin-bottom: 10px; }
.feature-card p { color: var(--text-secondary); font-size: 14.5px; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; counter-reset: step; }
.step {
  position: relative;
  padding: 30px 26px 26px;
  border-radius: var(--radius-card);
  background: linear-gradient(180deg, rgba(27,33,43,0.7), rgba(18,24,31,0.7));
  border: 1px solid var(--line);
  transition: var(--transition);
}
.step:hover { transform: translateY(-6px); border-color: rgba(255,255,255,0.18); }
.step .step-num {
  counter-increment: step;
  font-family: "Montserrat", sans-serif;
  font-size: 46px;
  font-weight: 900;
  line-height: 1;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  margin-bottom: 14px;
}
.step .step-num::before { content: "0" counter(step); }
.step h3 { font-size: 18px; margin-bottom: 8px; }
.step p { color: var(--text-secondary); font-size: 14.5px; }

/* Download / platforms */
.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.dl-grid-single { max-width: 420px; margin: 0 auto; grid-template-columns: 1fr; }
.dl-card {
  text-align: center;
  padding: 38px 26px;
  border-radius: var(--radius-card);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--line);
  transition: var(--transition);
}
.dl-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-glow); border-color: rgba(59,130,246,0.35); }
.dl-card.featured { border-color: rgba(59,130,246,0.4); background: linear-gradient(180deg, rgba(37,99,235,0.12), rgba(22,27,34,0.7)); }
.dl-os { font-size: 44px; margin-bottom: 14px; }
.dl-os svg { margin: 0 auto 0; display: block; filter: drop-shadow(0 6px 16px rgba(59,130,246,0.45)); transition: var(--transition); }
.dl-card:hover .dl-os svg { transform: scale(1.12) translateY(-2px); }
.dl-card h3 { font-size: 22px; margin-bottom: 4px; }
.dl-meta { color: var(--text-secondary); font-size: 13px; margin-bottom: 22px; }
.dl-tag {
  display: inline-block;
  margin-bottom: 14px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 11px; font-weight: 800; letter-spacing: 0.5px;
  background: rgba(16,185,129,0.15); color: var(--accent-green);
  text-transform: uppercase;
}

/* FAQ */
.faq { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: var(--glass-bg);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: rgba(59,130,246,0.3); }
.faq-q {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 700;
  font-size: 16px;
}
.faq-q .chev { transition: transform 0.3s ease; color: var(--accent-blue); font-size: 20px; }
.faq-item.open .faq-q .chev { transform: rotate(180deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.4s ease; padding: 0 24px; color: var(--text-secondary); }
.faq-item.open .faq-a { max-height: 300px; padding: 0 24px 22px; }

/* CTA band */
.cta-band {
  position: relative;
  margin: 0 auto;
  max-width: var(--maxw);
  border-radius: 22px;
  padding: 60px 40px;
  text-align: center;
  background: linear-gradient(120deg, rgba(37,99,235,0.22), rgba(16,185,129,0.16));
  border: 1px solid rgba(59,130,246,0.3);
  overflow: hidden;
}
.cta-band::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(600px 300px at 50% -40%, rgba(59,130,246,0.4), transparent 70%);
  pointer-events: none;
}
.cta-band h2 { font-size: clamp(28px, 4vw, 44px); margin-bottom: 14px; position: relative; }
.cta-band p { color: var(--text-secondary); font-size: 17px; margin-bottom: 30px; position: relative; }
.cta-actions { position: relative; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ============================================================
   CONTENT PAGES (about / policy)
   ============================================================ */
.page-hero {
  padding: 150px 0 50px;
  text-align: center;
}
.page-hero h1 { font-size: clamp(32px, 5vw, 52px); margin-bottom: 14px; }
.page-hero p { color: var(--text-secondary); font-size: 17px; max-width: 620px; margin: 0 auto; }

.content-wrap { display: grid; grid-template-columns: 240px 1fr; gap: 40px; padding-bottom: 90px; }
.toc {
  position: sticky;
  top: 90px;
  align-self: start;
  margin-top: 45px;
  padding: 20px;
  border-radius: var(--radius-card);
  background: var(--glass-bg);
  border: 1px solid var(--line);
}
.toc h4 { font-size: 12px; text-transform: uppercase; letter-spacing: 1px; color: var(--text-secondary); margin-bottom: 12px; }
.toc a {
  display: block;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  transition: var(--transition);
  border-left: 2px solid transparent;
}
.toc a:hover, .toc a.active { color: #fff; background: rgba(59,130,246,0.1); border-left-color: var(--accent-blue); }

.doc article {
  padding: 30px 34px;
  border-radius: var(--radius-card);
  background: var(--glass-bg);
  border: 1px solid var(--line);
  margin-bottom: 20px;
  transition: var(--transition);
}
.doc article:hover { border-color: rgba(255,255,255,0.14); }
.doc h2 { font-size: 24px; margin-bottom: 14px; scroll-margin-top: 90px; }
.doc h3 { font-size: 18px; margin: 18px 0 8px; color: #cfe0ff; }
.doc p { color: var(--text-secondary); margin-bottom: 12px; }
.doc ul { color: var(--text-secondary); padding-left: 22px; margin-bottom: 12px; }
.doc li { margin-bottom: 7px; }
.doc strong { color: var(--text-primary); }
.doc .updated { font-size: 13px; color: var(--text-secondary); margin-bottom: 24px; }

/* about values */
.values-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 22px; }
.team-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 22px; }
.team-grid-3 { grid-template-columns: repeat(3,1fr); max-width: 940px; margin: 0 auto; }
.team-grid-4 { grid-template-columns: repeat(4,1fr); }
.team-card {
  position: relative;
  text-align: center;
  padding: 32px 22px 26px;
  border-radius: var(--radius-card);
  background: var(--glass-bg);
  border: 1px solid var(--line);
  transition: var(--transition);
  overflow: hidden;
}
.team-glow {
  position: absolute;
  top: -40%; left: 50%;
  width: 200px; height: 200px;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(59,130,246,0.35), transparent 70%);
  opacity: 0;
  transition: opacity 0.45s ease;
  pointer-events: none;
}
.team-card:hover { transform: translateY(-10px); box-shadow: var(--shadow-glow); border-color: rgba(59,130,246,0.4); }
.team-card:hover .team-glow { opacity: 1; }
.team-avatar {
  position: relative;
  width: 96px; height: 96px; border-radius: 50%;
  margin: 0 auto 16px;
  display: grid; place-items: center;
  font-size: 32px; font-weight: 900; color: #fff;
  background: linear-gradient(135deg, #1e3a5f, #2563eb);
  border: 2px solid rgba(255,255,255,0.15);
  overflow: hidden;
  transition: var(--transition);
  z-index: 1;
}
.team-avatar img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  border-radius: 50%;
  z-index: 2;
}
.team-card:hover .team-avatar {
  transform: scale(1.08);
  box-shadow: 0 0 0 5px rgba(59,130,246,0.22);
  border-color: var(--accent-blue);
}
.team-card h4 { font-size: 17px; margin-bottom: 2px; position: relative; z-index: 1; }
.team-role { font-size: 13px; color: var(--accent-blue); font-weight: 700; position: relative; z-index: 1; }
.team-bio { margin-top: 12px; font-size: 13.5px; color: var(--text-secondary); line-height: 1.6; position: relative; z-index: 1; }

/* ── Timeline ──────────────────────────────────────────────── */
.timeline {
  position: relative;
  max-width: 820px;
  margin: 0 auto;
  padding-left: 8px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 16px; top: 6px; bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-blue), var(--accent-green));
  opacity: 0.5;
}
.tl-item { position: relative; padding: 0 0 26px 52px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-dot {
  position: absolute;
  left: 9px; top: 6px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--accent-blue);
  border: 3px solid var(--bg-main);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.3);
  transition: var(--transition);
}
.tl-item:hover .tl-dot { transform: scale(1.25); box-shadow: 0 0 0 6px rgba(59,130,246,0.25); }
.tl-card {
  padding: 18px 22px;
  border-radius: var(--radius-card);
  background: var(--glass-bg);
  border: 1px solid var(--line);
  transition: var(--transition);
}
.tl-card:hover { transform: translateX(6px); border-color: rgba(59,130,246,0.35); box-shadow: var(--shadow-soft); }
.tl-date {
  display: inline-block;
  margin-bottom: 8px;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  font-size: 11.5px; font-weight: 800; letter-spacing: 0.5px;
  background: rgba(59,130,246,0.14);
  color: #9fc4ff;
  text-transform: uppercase;
}
.tl-card h3 { font-size: 17px; margin-bottom: 6px; }
.tl-card p { color: var(--text-secondary); font-size: 14px; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  border-top: 1px solid var(--line);
  background: rgba(13, 17, 23, 0.6);
  padding: 56px 0 26px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}
.footer-brand p { color: var(--text-secondary); font-size: 14px; margin: 14px 0 18px; max-width: 300px; }
.footer-contact { list-style: none; margin: 0 0 18px; padding: 0; display: flex; flex-direction: column; gap: 9px; }
.footer-contact li { display: flex; align-items: center; gap: 10px; font-size: 14px; }
.footer-contact .fc-ico {
  width: 28px; height: 28px; flex-shrink: 0;
  display: grid; place-items: center;
  border-radius: 8px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--line);
  font-size: 14px;
}
.footer-contact a { color: var(--text-secondary); transition: var(--transition); }
.footer-contact a:hover { color: var(--accent-blue); }
.footer-contact li > span:not(.fc-ico) { color: var(--text-secondary); user-select: text; }
.footer-col h4 { font-size: 13px; text-transform: uppercase; letter-spacing: 1px; color: #fff; margin-bottom: 16px; }
.footer-col a { display: block; color: var(--text-secondary); font-size: 14px; padding: 5px 0; transition: var(--transition); }
.footer-col a:hover { color: var(--accent-blue); transform: translateX(4px); }
.socials { display: flex; gap: 10px; }
.social {
  width: 40px; height: 40px; border-radius: 10px;
  display: grid; place-items: center;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--line);
  font-size: 18px;
  color: var(--text-secondary);
  transition: var(--transition);
}
.social svg { display: block; }
.social:hover { background: var(--accent-blue); color: #fff; transform: translateY(-4px); box-shadow: 0 8px 20px rgba(59,130,246,0.4); }
.footer-bottom {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--text-secondary);
  font-size: 13px;
}

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity 0.7s cubic-bezier(0.22,1,0.36,1), transform 0.7s cubic-bezier(0.22,1,0.36,1);
  will-change: opacity, transform;
}
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal.d1 { transition-delay: 0.1s; }
.reveal.d2 { transition-delay: 0.2s; }
.reveal.d3 { transition-delay: 0.3s; }

/* Scroll progress bar */
.scroll-progress {
  position: fixed; top: 0; left: 0;
  height: 3px; width: 0;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-green));
  z-index: 1100;
  box-shadow: 0 0 10px rgba(59,130,246,0.6);
}

/* Back to top */
.to-top {
  position: fixed;
  bottom: 28px; right: 28px;
  width: 48px; height: 48px;
  border-radius: 14px;
  background: var(--accent-blue);
  color: #fff;
  border: none;
  font-size: 22px;
  cursor: pointer;
  display: grid; place-items: center;
  opacity: 0; transform: translateY(20px); pointer-events: none;
  transition: var(--transition);
  box-shadow: 0 10px 26px rgba(37,99,235,0.4);
  z-index: 900;
}
.to-top.show { opacity: 1; transform: translateY(0); pointer-events: auto; }
.to-top:hover { transform: translateY(-4px); filter: brightness(1.1); }

/* ============================================================
   HERO GRID BG + MARQUEE + BENTO + REVIEWS (nâng cấp)
   ============================================================ */
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59,130,246,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,130,246,0.06) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(900px 500px at 50% 0%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(900px 500px at 50% 0%, #000 0%, transparent 75%);
  pointer-events: none;
  z-index: 0;
}

/* Marquee */
.marquee {
  position: relative;
  overflow: hidden;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(22,27,34,0.4);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee-track {
  display: inline-flex;
  align-items: center;
  gap: 26px;
  white-space: nowrap;
  animation: marquee 26s linear infinite;
}
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-track span { font-size: 15px; font-weight: 700; color: #c7d5e0; }
.marquee-track .sep { color: var(--accent-blue); }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* Bento grid */
.bento {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: minmax(190px, auto);
  gap: 18px;
}
.bento-item {
  position: relative;
  padding: 26px;
  border-radius: var(--radius-card);
  background: var(--glass-bg);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.bento-item::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(500px 240px at 50% -20%, rgba(59,130,246,0.16), transparent 70%);
  opacity: 0; transition: opacity 0.4s ease; pointer-events: none;
}
.bento-item:hover { transform: translateY(-6px); border-color: rgba(59,130,246,0.4); box-shadow: var(--shadow-glow); }
.bento-item:hover::after { opacity: 1; }
.bento-item.b-lg { grid-column: span 2; grid-row: span 2; }
.bento-item.b-wide { grid-column: span 2; }
.bento-emoji { font-size: 34px; }
.bento-item h3 { font-size: 18px; margin: 12px 0 8px; }
.bento-item p { color: var(--text-secondary); font-size: 14px; }
.bento-tag {
  display: inline-block; align-self: flex-start;
  padding: 4px 12px; border-radius: var(--radius-pill);
  font-size: 11px; font-weight: 800; letter-spacing: 0.5px; text-transform: uppercase;
  background: rgba(16,185,129,0.15); color: var(--accent-green); margin-bottom: 12px;
}
.bento-content h3 { font-size: 26px; }
.bento-content p { font-size: 15px; max-width: 420px; }
.bento-visual { margin-top: 18px; display: flex; flex-direction: column; gap: 12px; }
.perf-bar { position: relative; height: 30px; }
.perf-bar span {
  position: relative;
  display: flex; align-items: center;
  height: 100%; padding: 0 14px;
  border-radius: 8px;
  font-size: 12.5px; font-weight: 700; color: #fff;
  width: var(--w);
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-green));
  animation: growBar 1.4s cubic-bezier(0.22,1,0.36,1) both;
}
.perf-bar.alt span { background: rgba(255,255,255,0.12); color: var(--text-secondary); }
@keyframes growBar { from { width: 0; } }
.bento-chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.chip {
  padding: 8px 14px; border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.05); border: 1px solid var(--line);
  font-size: 13px; font-weight: 600; transition: var(--transition);
}
.chip:hover { background: rgba(59,130,246,0.16); border-color: rgba(59,130,246,0.4); transform: translateY(-3px); }

/* Reviews */
.reviews-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
.review-card {
  padding: 28px 26px;
  border-radius: var(--radius-card);
  background: var(--glass-bg);
  border: 1px solid var(--line);
  transition: var(--transition);
}
.review-card:hover { transform: translateY(-8px); border-color: rgba(59,130,246,0.35); box-shadow: var(--shadow-glow); }
.review-card .stars { color: #fbbf24; font-size: 16px; letter-spacing: 2px; margin-bottom: 14px; }
.review-card > p { color: var(--text-primary); font-size: 14.5px; line-height: 1.65; margin-bottom: 20px; }
.reviewer { display: flex; align-items: center; gap: 12px; }
.rv-avatar {
  position: relative;
  width: 42px; height: 42px; border-radius: 50%;
  display: grid; place-items: center;
  font-weight: 800; color: #fff;
  background: linear-gradient(135deg, #1e3a5f, #2563eb);
  flex-shrink: 0;
  overflow: hidden;
}
.rv-avatar img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  border-radius: 50%;
}
.reviewer strong { display: block; font-size: 14px; }
.reviewer small { color: var(--text-secondary); font-size: 12.5px; }

/* ── Ưu đãi & sự kiện ─────────────────────────────────────── */
.perks-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; margin-bottom: 28px; }
.perk-card {
  position: relative;
  padding: 28px 24px;
  border-radius: var(--radius-card);
  background: var(--glass-bg);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: var(--transition);
}
.perk-card::before {
  content: "";
  position: absolute; left: 0; top: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-green));
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.22,1,0.36,1);
}
.perk-card:hover { transform: translateY(-8px); border-color: rgba(59,130,246,0.4); box-shadow: var(--shadow-glow); }
.perk-card:hover::before { transform: scaleX(1); }
.perk-card.hot { border-color: rgba(251,146,60,0.4); }
.perk-badge {
  position: absolute; top: 14px; right: 14px;
  padding: 3px 10px; border-radius: var(--radius-pill);
  font-size: 10.5px; font-weight: 900; letter-spacing: 0.5px;
  background: linear-gradient(90deg, #f97316, #ef4444); color: #fff;
  animation: badgePulse 1.8s ease-in-out infinite;
}
@keyframes badgePulse { 0%,100% { transform: scale(1); } 50% { transform: scale(1.08); } }
.perk-ico {
  width: 54px; height: 54px; border-radius: 14px;
  display: grid; place-items: center; font-size: 26px;
  background: linear-gradient(135deg, rgba(59,130,246,0.18), rgba(16,185,129,0.14));
  border: 1px solid var(--line);
  margin-bottom: 16px;
  transition: var(--transition);
}
.perk-card:hover .perk-ico { transform: scale(1.12) rotate(-6deg); }
.perk-card h3 { font-size: 17px; margin-bottom: 8px; }
.perk-card p { color: var(--text-secondary); font-size: 14px; }

.event-banner {
  position: relative;
  display: flex; align-items: center; gap: 24px; flex-wrap: wrap;
  padding: 32px 36px;
  border-radius: 18px;
  background: linear-gradient(120deg, rgba(37,99,235,0.2), rgba(16,185,129,0.14));
  border: 1px solid rgba(59,130,246,0.3);
  overflow: hidden;
}
.event-banner-glow {
  position: absolute; width: 400px; height: 400px; border-radius: 50%;
  background: radial-gradient(circle, rgba(59,130,246,0.4), transparent 70%);
  top: -60%; left: -5%; filter: blur(40px);
  animation: floatGlow 9s ease-in-out infinite; pointer-events: none;
}
.event-banner-text { position: relative; flex: 1; min-width: 260px; }
.event-banner-text h3 { font-size: 24px; margin: 10px 0 8px; }
.event-banner-text p { color: var(--text-secondary); font-size: 15px; max-width: 560px; }
.event-banner .btn { position: relative; }
.event-live {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 12px; font-weight: 800; letter-spacing: 0.5px; color: #fca5a5;
  text-transform: uppercase;
}
.live-dot {
  width: 9px; height: 9px; border-radius: 50%; background: #ef4444;
  box-shadow: 0 0 0 0 rgba(239,68,68,0.6); animation: pulse 1.8s infinite;
}

/* ── Trang Liên hệ ────────────────────────────────────────── */
.contact-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.contact-card {
  position: relative;
  padding: 28px 24px;
  border-radius: var(--radius-card);
  background: var(--glass-bg);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: var(--transition);
}
.contact-card::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(360px 180px at 50% -20%, rgba(59,130,246,0.16), transparent 70%);
  opacity: 0; transition: opacity 0.4s ease; pointer-events: none;
}
.contact-card:hover { transform: translateY(-8px); border-color: rgba(59,130,246,0.4); box-shadow: var(--shadow-glow); }
.contact-card:hover::after { opacity: 1; }
.contact-ico {
  width: 54px; height: 54px; border-radius: 14px;
  display: grid; place-items: center; font-size: 26px;
  background: linear-gradient(135deg, rgba(59,130,246,0.18), rgba(16,185,129,0.14));
  border: 1px solid var(--line);
  margin-bottom: 16px;
  transition: var(--transition);
}
.contact-card:hover .contact-ico { transform: scale(1.12) rotate(-6deg); }
.contact-card h3 { font-size: 18px; margin-bottom: 6px; }
.contact-card p { color: var(--text-secondary); font-size: 14px; margin-bottom: 12px; }
.contact-val { display: block; font-weight: 700; color: #cfe0ff; font-size: 15px; }
.contact-link { display: inline-block; font-weight: 700; color: var(--accent-blue); transition: var(--transition); }
.contact-link:hover { color: var(--accent-green); }

.contact-form-wrap {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 36px;
  align-items: start;
  padding: 36px;
  border-radius: var(--radius-card);
  background: var(--glass-bg);
  border: 1px solid var(--line);
}
.contact-form-intro .eyebrow { margin-bottom: 14px; }
.contact-form-intro h2 { font-size: 26px; margin-bottom: 12px; }
.contact-form-intro p { color: var(--text-secondary); font-size: 15px; margin-bottom: 20px; }
.contact-points { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.contact-points li { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--text-primary); }
.cp-ico {
  width: 24px; height: 24px; border-radius: 50%; flex-shrink: 0;
  display: grid; place-items: center; font-size: 12px; font-weight: 800; color: #fff;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
}
.cf-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.cf-field { margin-bottom: 16px; }
.cf-field label { display: block; font-size: 12px; font-weight: 700; color: #9eb2c1; margin-bottom: 7px; }
.cf-field input, .cf-field textarea {
  width: 100%;
  background: #121b26;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 12px;
  padding: 13px 14px;
  color: #d8e6f0;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
  resize: vertical;
}
.cf-field input:focus, .cf-field textarea:focus {
  border-color: var(--accent-blue);
  background: #162332;
  box-shadow: 0 0 0 3px rgba(59,130,246,0.2);
}
.cf-note { text-align: center; margin-top: 14px; font-size: 13px; color: var(--text-secondary); }
.cf-note strong { color: #cfe0ff; }

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* Tablet */
@media (max-width: 1024px) {
  .feature-grid, .steps, .dl-grid { grid-template-columns: repeat(2, 1fr); }
  .team-grid-3 { grid-template-columns: repeat(3, 1fr); }
  .bento { grid-template-columns: repeat(2, 1fr); }
  .bento-item.b-lg, .bento-item.b-wide { grid-column: span 2; }
  .bento-item.b-lg { grid-row: span 1; }
  .perks-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 940px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero p.lead { margin-left: auto; margin-right: auto; }
  .hero-actions, .hero-stats { justify-content: center; }
  .hero-visual { display: none; }
  .feature-grid, .steps, .dl-grid { grid-template-columns: 1fr 1fr; }
  .team-grid, .team-grid-3 { grid-template-columns: 1fr 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr 1fr; }
  .contact-form-wrap { grid-template-columns: 1fr; gap: 24px; }
  .values-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .content-wrap { grid-template-columns: 1fr; }
  .toc { position: static; margin-top: 0; }
}

/* Mobile: hamburger + slide-in drawer */
@media (max-width: 760px) {
  .navbar { height: 60px; }
  .nav-cta { display: none; }          /* nút CTA chuyển vào trong menu */
  .nav-toggle { display: grid; place-items: center; margin-left: auto; }

  .nav-links {
    position: fixed;
    top: 0; right: 0;
    z-index: 1050;
    flex-direction: column;
    align-items: stretch;
    width: min(82vw, 320px);
    height: 100vh;
    padding: 88px 20px 28px;
    gap: 8px;
    background: linear-gradient(180deg, rgba(16,21,29,0.99), rgba(11,14,20,0.99));
    border-left: 1px solid var(--line);
    box-shadow: -20px 0 60px rgba(0,0,0,0.5);
    transform: translateX(105%);
    transition: transform 0.4s cubic-bezier(0.22,1,0.36,1);
    overflow-y: auto;
  }
  .nav-links.open { transform: translateX(0); }

  .nav-link {
    padding: 14px 16px;
    font-size: 16px;
    border-radius: 12px;
    border: 1px solid transparent;
    opacity: 0;
    transform: translateX(20px);
  }
  .nav-link::after { display: none; }
  .nav-links.open .nav-link {
    opacity: 1;
    transform: translateX(0);
    transition: opacity 0.4s ease, transform 0.4s ease, background 0.2s, color 0.2s;
  }
  .nav-links.open li:nth-child(1) .nav-link { transition-delay: 0.08s; }
  .nav-links.open li:nth-child(2) .nav-link { transition-delay: 0.14s; }
  .nav-links.open li:nth-child(3) .nav-link { transition-delay: 0.20s; }
  .nav-links.open li:nth-child(4) .nav-link { transition-delay: 0.26s; }
  .nav-links.open li:nth-child(5) .nav-link { transition-delay: 0.32s; }
  .nav-link:hover, .nav-link.active {
    background: rgba(59,130,246,0.14);
    color: #fff;
    border-color: rgba(59,130,246,0.3);
  }

  .nav-mobile-cta {
    display: block;
    margin-top: 14px;
    opacity: 0;
    transform: translateX(20px);
  }
  .nav-links.open .nav-mobile-cta {
    opacity: 1; transform: translateX(0);
    transition: opacity 0.4s ease 0.38s, transform 0.4s ease 0.38s;
  }
  .nav-mobile-cta .btn { width: 100%; }

  /* Backdrop mờ phía sau drawer */
  .nav-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1040;
    background: rgba(5, 8, 12, 0.6);
    backdrop-filter: blur(3px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s ease;
  }
  .nav-backdrop.show { opacity: 1; pointer-events: auto; }

  /* Hamburger -> X animation */
  .nav-toggle {
    position: relative;
    z-index: 1060;
    font-size: 0;
  }
  .nav-toggle .bar {
    position: absolute;
    left: 50%; top: 50%;
    width: 20px; height: 2px;
    background: #fff;
    border-radius: 2px;
    transform: translate(-50%, -50%);
    transition: transform 0.3s ease, opacity 0.2s ease;
  }
  .nav-toggle .bar.b1 { transform: translate(-50%, -7px); }
  .nav-toggle .bar.b3 { transform: translate(-50%, 5px); }
  body.nav-open .nav-toggle .bar.b1 { transform: translate(-50%, -50%) rotate(45deg); }
  body.nav-open .nav-toggle .bar.b2 { opacity: 0; }
  body.nav-open .nav-toggle .bar.b3 { transform: translate(-50%, -50%) rotate(-45deg); }

  body.nav-open { overflow: hidden; }
}

@media (max-width: 600px) {
  .container, .nav-inner { padding: 0 18px; }
  .feature-grid, .steps, .dl-grid, .team-grid, .team-grid-3, .footer-grid { grid-template-columns: 1fr; }
  .bento { grid-template-columns: 1fr; grid-auto-rows: auto; }
  .bento-item.b-lg, .bento-item.b-wide { grid-column: span 1; }
  .bento-content h3 { font-size: 22px; }
  .perks-grid { grid-template-columns: 1fr; }
  .event-banner { padding: 26px 22px; }
  .contact-grid { grid-template-columns: 1fr; }
  .contact-form-wrap { padding: 24px 20px; }
  .cf-row { grid-template-columns: 1fr; gap: 0; }
  .hero { padding: 120px 0 70px; }
  .hero h1 { font-size: clamp(30px, 8vw, 40px); }
  .hero p.lead { font-size: 16px; }
  .hero-actions .btn { width: 100%; }
  .hero-stats { gap: 22px 30px; }
  .stat .num { font-size: 26px; }
  .section { padding: 56px 0; }
  .section-head { margin-bottom: 38px; }
  .cta-band { padding: 44px 22px; border-radius: 18px; }
  .cta-actions .btn { width: 100%; }
  .doc article { padding: 22px 18px; }
  .footer { padding: 44px 0 22px; }
  .footer-bottom { justify-content: center; text-align: center; }
  .to-top { bottom: 18px; right: 18px; width: 44px; height: 44px; }
}

/* Màn rất nhỏ */
@media (max-width: 380px) {
  .brand { font-size: 19px; }
  .hero h1 { font-size: 28px; }
  .dl-grid-single { max-width: 100%; }
}