/* ═══════════════════════════════════
   BT Software — Landing Page CSS v2
   Premium SaaS Design System
   ═══════════════════════════════════ */

/* ── Variables ── */
:root {
  --primary: #0052CC;
  --primary-dark: #003B99;
  --primary-light: #4C9AFF;
  --accent: #00C853;
  --accent-dark: #00A344;
  --navy: #0A1628;
  --navy-light: #1A2B4A;
  --surface: #F7F9FC;
  --card: #FFFFFF;
  --text: #1A2B4A;
  --text-muted: #6B7A8D;
  --border: #E1E8F0;
  --gradient-hero: linear-gradient(135deg, #060d1f 0%, #0a1c3e 40%, #0d2a5c 100%);
  --gradient-accent: linear-gradient(135deg, #00C853, #00B0FF);
  --gradient-card: linear-gradient(145deg, #fff, #f7f9fc);
  --shadow-sm: 0 2px 8px rgba(0,0,0,.06);
  --shadow-md: 0 8px 30px rgba(0,0,0,.1);
  --shadow-lg: 0 20px 60px rgba(0,0,0,.15);
  --shadow-glow: 0 0 40px rgba(0,82,204,.25);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: .3s cubic-bezier(.4,0,.2,1);
}

/* ── Reset ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: 'Be Vietnam Pro', sans-serif;
  color: var(--text); 
  background-color: #F9FAFC;
  background-image: linear-gradient(rgba(10, 22, 40, 0.025) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(10, 22, 40, 0.025) 1px, transparent 1px);
  background-size: 32px 32px;
  background-position: center top;
  line-height: 1.7; overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; font-family: inherit; border: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.eco-container { max-width: 1280px; }

/* ── Navbar ── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 14px 0;
  background: rgba(10,22,40,.6);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,.06);
  transition: var(--transition);
}
.navbar.scrolled { padding: 8px 0; background: rgba(10,22,40,.95); box-shadow: var(--shadow-md); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; }
.nav-logo { display: flex; align-items: center; gap: 10px; }
.logo-img {
  width: 44px; height: 44px;
  object-fit: contain;
}
.nav-logo span { font-size: 18px; font-weight: 800; color: #fff; letter-spacing: -.3px; }
.nav-logo small { display: block; font-size: 10px; color: var(--primary-light); font-weight: 500; letter-spacing: .5px; }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: rgba(255,255,255,.7); font-size: 13.5px; font-weight: 500; transition: var(--transition); position: relative; }
.nav-links a:hover { color: #fff; }
.nav-links a::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px; background: var(--gradient-accent); transition: var(--transition); border-radius: 2px; }
.nav-links a:hover::after { width: 100%; }
.btn-nav { background: var(--accent) !important; color: #fff !important; padding: 10px 22px; border-radius: 50px; font-weight: 700; font-size: 13px; transition: var(--transition); box-shadow: 0 4px 15px rgba(0,200,83,.25); }
.btn-nav:hover { background: var(--accent-dark) !important; transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0,200,83,.35); }
.btn-nav::after { display: none !important; }
.nav-toggle { display: none; background: none; color: #fff; font-size: 24px; }

/* ── Hero ── */
.hero {
  min-height: 100vh;
  background: var(--gradient-hero);
  position: relative; overflow: hidden;
  padding: 120px 0 140px;
  display: flex; align-items: center;
}
.hero-bg { position: absolute; inset: 0; overflow: hidden; }
.hero-orb {
  position: absolute; border-radius: 50%;
  filter: blur(80px); opacity: .4;
}
.hero-orb-1 {
  width: 600px; height: 600px; top: -200px; right: -100px;
  background: radial-gradient(circle, rgba(0,82,204,.6) 0%, transparent 70%);
  animation: orbFloat 20s ease-in-out infinite;
}
.hero-orb-2 {
  width: 400px; height: 400px; bottom: -100px; left: -50px;
  background: radial-gradient(circle, rgba(0,200,83,.4) 0%, transparent 70%);
  animation: orbFloat 15s ease-in-out infinite reverse;
}
.hero-orb-3 {
  width: 300px; height: 300px; top: 50%; left: 40%;
  background: radial-gradient(circle, rgba(76,154,255,.3) 0%, transparent 70%);
  animation: orbFloat 18s ease-in-out infinite 5s;
}
@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(40px, -60px) scale(1.1); }
  66% { transform: translate(-30px, 40px) scale(.9); }
}
.hero-grid {
  position: absolute; inset: 0;
  background: linear-gradient(rgba(255,255,255,.02) 1px, transparent 1px),
              linear-gradient(90deg, rgba(255,255,255,.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask: radial-gradient(ellipse at center, black 30%, transparent 70%);
}
.hero-inner {
  display: grid; grid-template-columns: 1fr 1.1fr; gap: 80px;
  align-items: center; position: relative; z-index: 2;
}
.hero-chip {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(0,200,83,.1); border: 1px solid rgba(0,200,83,.25);
  padding: 6px 16px; border-radius: 50px; font-size: 12px; font-weight: 600;
  color: var(--accent); margin-bottom: 20px;
}
.chip-dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--accent);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .4; } }
.hero-text h1 {
  font-size: 52px; font-weight: 900; color: #fff; line-height: 1.15;
  margin-bottom: 20px; letter-spacing: -1.5px;
}
.gradient-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-text p { font-size: 17px; color: rgba(255,255,255,.55); margin-bottom: 32px; max-width: 480px; line-height: 1.8; }
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 36px; }
.btn-primary {
  background: var(--accent); color: #fff; padding: 15px 32px; border-radius: 50px;
  font-size: 15px; font-weight: 700; transition: var(--transition);
  display: inline-flex; align-items: center; gap: 8px;
  position: relative; overflow: hidden;
}
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-3px); box-shadow: 0 12px 35px rgba(0,200,83,.35); }
.btn-glow { box-shadow: 0 4px 25px rgba(0,200,83,.3); }
.btn-shine {
  position: absolute; top: 0; left: -100%; width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.2), transparent);
  animation: shine 3s ease-in-out infinite;
}
@keyframes shine { 0% { left: -100%; } 50%,100% { left: 100%; } }
.btn-glass {
  background: rgba(255,255,255,.08); color: #fff; padding: 15px 32px; border-radius: 50px;
  font-size: 15px; font-weight: 600; border: 1.5px solid rgba(255,255,255,.15);
  transition: var(--transition); display: inline-flex; align-items: center; gap: 8px;
  backdrop-filter: blur(10px);
}
.btn-glass:hover { background: rgba(255,255,255,.15); border-color: rgba(255,255,255,.3); transform: translateY(-3px); }

/* Hero trust */
.hero-trust { display: flex; align-items: center; gap: 12px; }
.trust-avatars { display: flex; }
.ta {
  width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center;
  justify-content: center; color: #fff; font-weight: 700; font-size: 11px;
  margin-right: -8px; border: 2px solid var(--navy);
}
.hero-trust span { font-size: 13px; color: rgba(255,255,255,.5); }
.hero-trust b { color: rgba(255,255,255,.8); }

/* Hero Dashboard Mock */
.hero-visual { position: relative; }
.hero-dashboard {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1);
  border-radius: 16px; overflow: hidden;
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 40px 80px rgba(0,0,0,.3), 0 0 60px rgba(0,82,204,.15);
  animation: dashFloat 6s ease-in-out infinite;
}
@keyframes dashFloat { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
.hd-topbar {
  background: rgba(0,0,0,.3); padding: 10px 16px;
  display: flex; align-items: center; gap: 12px;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.hd-dots { display: flex; gap: 6px; }
.hd-dots span { width: 10px; height: 10px; border-radius: 50%; }
.hd-dots span:nth-child(1) { background: #FF5F57; }
.hd-dots span:nth-child(2) { background: #FEBC2E; }
.hd-dots span:nth-child(3) { background: #28C840; }
.hd-title { font-size: 12px; color: rgba(255,255,255,.5); font-weight: 600; }
.hd-body { padding: 20px; }
.hd-stat-row { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; margin-bottom: 16px; }
.hd-stat {
  background: rgba(255,255,255,.05); border-radius: 10px; padding: 12px;
  border: 1px solid rgba(255,255,255,.06); text-align: center;
}
.hd-stat-icon { font-size: 20px; margin-bottom: 4px; }
.hd-stat-val { font-size: 20px; font-weight: 800; color: #fff; }
.hd-stat-label { font-size: 10px; color: rgba(255,255,255,.4); font-weight: 500; }
.hd-chart {
  background: rgba(255,255,255,.04); border-radius: 10px; padding: 14px;
  border: 1px solid rgba(255,255,255,.06); margin-bottom: 12px;
}
.hd-chart-title { font-size: 11px; color: rgba(255,255,255,.4); font-weight: 600; margin-bottom: 12px; }
.hd-bars { display: flex; gap: 8px; height: 80px; align-items: flex-end; }
.hd-bar {
  flex: 1; background: var(--gradient-accent); border-radius: 4px 4px 0 0;
  height: var(--h); position: relative; opacity: .7;
  animation: barGrow 1.5s ease-out forwards;
  transform-origin: bottom;
}
@keyframes barGrow { from { transform: scaleY(0); } to { transform: scaleY(1); } }
.hd-bar span { position: absolute; bottom: -18px; left: 50%; transform: translateX(-50%); font-size: 9px; color: rgba(255,255,255,.3); }
.hd-row-data { display: flex; flex-direction: column; gap: 6px; }
.hd-row {
  display: flex; align-items: center; gap: 8px; font-size: 11px; color: rgba(255,255,255,.5);
  padding: 6px 10px; background: rgba(255,255,255,.03); border-radius: 6px;
}
.hd-dot { width: 8px; height: 8px; border-radius: 50%; }
.hd-dot.green { background: var(--accent); }
.hd-dot.blue { background: var(--primary-light); }
.hd-dot.orange { background: #FF6B35; }

/* Floating badges */
.float-badge {
  position: absolute; padding: 12px 16px; border-radius: 12px;
  background: rgba(255,255,255,.95); backdrop-filter: blur(10px);
  box-shadow: 0 10px 40px rgba(0,0,0,.15); display: flex; align-items: center; gap: 10px;
}
.fb-icon { font-size: 22px; }
.float-badge b { font-size: 12px; color: var(--navy); display: block; }
.float-badge small { font-size: 10px; color: var(--text-muted); display: block; }
.fb-1 { bottom: 60px; left: -30px; animation: floatBadge 4s ease-in-out infinite; }
.fb-2 { top: 40px; right: -20px; animation: floatBadge 5s ease-in-out infinite 1s; }
@keyframes floatBadge { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* Hero wave */
.hero-wave { position: absolute; bottom: -1px; left: 0; right: 0; z-index: 3; }
.hero-wave svg { width: 100%; height: 120px; display: block; }

/* ── Stats Bar ── */
.stats-bar {
  background: var(--card); border-radius: var(--radius); padding: 36px 48px;
  box-shadow: 0 10px 40px rgba(0,0,0,.08); margin-top: -60px; position: relative; z-index: 10;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  border: 1px solid var(--border);
}
.stat-item { text-align: center; }
.stat-item .num {
  font-size: 34px; font-weight: 900; letter-spacing: -1px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.stat-item .label { font-size: 13px; color: var(--text-muted); font-weight: 500; margin-top: 2px; }

/* ── Section ── */
.section { padding: 100px 0; }
.section-alt { background: transparent; }
.section-dark {
  background: var(--gradient-hero); position: relative; overflow: hidden;
}
.section-dark::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(rgba(255,255,255,.02) 1px, transparent 1px),
              linear-gradient(90deg, rgba(255,255,255,.02) 1px, transparent 1px);
  background-size: 50px 50px;
}
.section-header { text-align: center; margin-bottom: 60px; }
.section-header .tag {
  display: inline-block; background: rgba(0,82,204,.08); color: var(--primary);
  padding: 8px 20px; border-radius: 50px; font-size: 12px; font-weight: 700;
  letter-spacing: .5px; margin-bottom: 16px; text-transform: uppercase;
}
.tag-light { background: rgba(255,255,255,.1) !important; color: var(--primary-light) !important; }
.section-header h2 { font-size: 40px; font-weight: 900; color: var(--navy); line-height: 1.2; letter-spacing: -1px; }
.section-header p { font-size: 17px; color: var(--text-muted); margin-top: 14px; max-width: 560px; margin-left: auto; margin-right: auto; }

/* ── Ecosystem ── */
.eco-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.eco-card {
  background: var(--card); border-radius: 20px; padding: 36px 28px;
  border: 1px solid var(--border); transition: var(--transition);
  position: relative; text-align: center; overflow: hidden;
}
.eco-glow {
  position: absolute; top: -60px; left: 50%; transform: translateX(-50%);
  width: 200px; height: 200px; border-radius: 50%;
  opacity: 0; transition: .5s; filter: blur(60px);
}
.eco-card:hover { transform: translateY(-10px); box-shadow: var(--shadow-lg); }
.eco-card:hover .eco-glow { opacity: 1; }
.eco-stock .eco-glow { background: rgba(0,82,204,.15); }
.eco-team .eco-glow { background: rgba(255,107,53,.15); }
.eco-deal .eco-glow { background: rgba(156,39,176,.15); }
.eco-cash .eco-glow { background: rgba(0,150,199,.15); }
.eco-badge {
  position: absolute; top: 16px; right: 16px; padding: 5px 14px;
  border-radius: 50px; font-size: 11px; font-weight: 700; z-index: 2;
}
.eco-badge-active { background: rgba(0,200,83,.1); color: var(--accent-dark); }
.eco-badge-soon { background: rgba(255,152,0,.1); color: #E65100; }
.eco-icon-wrap {
  height: 72px; margin: 0 auto 16px;
  display: flex; align-items: center; justify-content: center; font-size: 32px;
  position: relative; z-index: 2;
}
.eco-logo-img {
  max-width: 100%; height: 100%; object-fit: contain;
}
.eco-icon-stock { background: none; }
.eco-icon-team { background: none; }
.eco-icon-deal { background: none; }
.eco-card h3 { font-size: 22px; font-weight: 800; margin-bottom: 6px; position: relative; z-index: 2; }
.eco-stock h3 { color: var(--primary); }
.eco-team h3 { color: #FF6B35; }
.eco-deal h3 { color: #9C27B0; }
.eco-cash h3 { color: #0096c7; }
.eco-tagline { font-size: 14px; color: var(--text-muted); margin-bottom: 20px; position: relative; z-index: 2; }
.eco-features { list-style: none; text-align: left; margin-bottom: 24px; position: relative; z-index: 2; }
.eco-features li { padding: 7px 0; font-size: 13px; color: var(--text); border-bottom: 1px solid rgba(0,0,0,.04); }
.eco-features li:last-child { border: none; }
.btn-eco {
  display: inline-block; padding: 12px 28px; border-radius: 50px;
  font-size: 14px; font-weight: 700; transition: var(--transition);
  position: relative; z-index: 2;
}
.btn-eco:disabled { opacity: .4; cursor: not-allowed; }
.btn-eco-stock { background: var(--primary); color: #fff; }
.btn-eco-stock:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0,82,204,.3); }
.btn-eco-team { background: #FF6B35; color: #fff; }
.btn-eco-deal { background: #9C27B0; color: #fff; }
.btn-eco-cash { background: #0096c7; color: #fff; }
.eco-icon-cash { background: none; }

/* Eco connect */
.eco-connect {
  display: flex; align-items: center; gap: 16px; margin-top: 40px;
  padding: 16px 24px; background: rgba(0,82,204,.04); border-radius: 50px;
  border: 1px dashed rgba(0,82,204,.15);
}
.ec-line { flex: 1; height: 1px; background: linear-gradient(to right, transparent, var(--primary-light), transparent); }
.ec-center { font-size: 13px; font-weight: 700; color: var(--primary); white-space: nowrap; }

/* App Version Segmented Tabs */
.eco-tabs-selector { display: flex; width: max-content; margin: 0 auto 36px auto; background: #e8ecf1; padding: 6px; border-radius: 40px; box-shadow: inset 0 2px 4px rgba(0,0,0,0.03); }
.eco-tab { padding: 12px 32px; font-weight: 700; font-size: 15px; color: var(--navy); opacity: 0.6; cursor: pointer; border-radius: 40px; transition: all 0.3s cubic-bezier(.4,0,.2,1); }
.eco-tab:hover { opacity: 0.8; }
.eco-tab.active { background: var(--primary); color: #fff; opacity: 1; box-shadow: 0 4px 14px rgba(0,82,204,0.35); }

.app-version-badge { text-align: center; margin-bottom: 12px; margin-top: -8px; position: relative; z-index: 2; }
.app-version-badge span { padding: 4px 12px; border-radius: 8px; font-size: 11px; font-weight: 700; letter-spacing: 0.5px; }
.v-cloud { display: inline-block; background: rgba(0,82,204,0.1); color: var(--primary); }
.v-local { display: none; background: rgba(0,200,83,0.1); color: var(--accent-dark); }
.eco-local-mode .v-cloud { display: none !important; }
.eco-local-mode .v-local { display: inline-block !important; }
.b-local { display: none !important; }
.eco-local-mode .b-cloud { display: none !important; }
.eco-local-mode .b-local { display: block !important; }

/* Horizontal Desc Banner */
.eco-desc-banner {
  max-width: 1080px; margin: 0 auto 40px auto;
  background: var(--gradient-hero); color: #fff; border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.15); box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}
.eco-desc { display: none; padding: 28px 40px; animation: descFade 0.4s ease-out; }
.eco-desc.active { display: block; }
.desc-header { font-size: 16px; margin-bottom: 20px; font-weight: 600; text-align: center; }
.desc-header b { color: var(--primary-light); }
.desc-local .desc-header b { color: var(--accent); }
.desc-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 40px; list-style: none; text-align: left; }
.desc-list li { font-size: 14px; opacity: 0.9; line-height: 1.6; display: flex; align-items: flex-start; gap: 8px; }
@keyframes descFade { from { opacity: 0; transform: translateY(-5px); } to { opacity: 1; transform: translateY(0); } }

/* ── Features (dark) ── */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; position: relative; z-index: 2; }
.feature-card {
  background: rgba(255,255,255,.04); border-radius: var(--radius); padding: 32px 24px;
  border: 1px solid rgba(255,255,255,.08); transition: var(--transition);
  backdrop-filter: blur(10px);
}
.feature-card:hover { transform: translateY(-6px); background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.15); }
.feature-icon {
  width: 52px; height: 52px; border-radius: 14px; display: flex; align-items: center;
  justify-content: center; font-size: 24px; margin-bottom: 16px;
}
.fi-blue { background: rgba(0,82,204,.15); }
.fi-green { background: rgba(0,200,83,.15); }
.fi-purple { background: rgba(156,39,176,.15); }
.fi-orange { background: rgba(255,107,53,.15); }
.fi-teal { background: rgba(0,150,136,.15); }
.fi-pink { background: rgba(233,30,99,.15); }
.feature-card h3 { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.feature-card p { font-size: 13px; color: rgba(255,255,255,.5); line-height: 1.7; }
.feature-plan {
  display: inline-block; margin-top: 14px; padding: 4px 14px;
  border-radius: 50px; font-size: 11px; font-weight: 700;
  background: rgba(0,82,204,.15); color: var(--primary-light);
}
.fp-pro { background: rgba(255,152,0,.15); color: #FFB74D; }
.fp-ent { background: rgba(156,39,176,.15); color: #CE93D8; }

/* ── How It Works ── */
.how-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.how-step { text-align: center; padding: 30px 20px; position: relative; }
.step-num {
  width: 56px; height: 56px; border-radius: 50%; margin: 0 auto 16px;
  background: var(--gradient-hero); color: #fff; font-size: 22px; font-weight: 900;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 25px rgba(10,22,40,.2); position: relative; z-index: 2;
}
.step-line {
  position: absolute; top: 56px; left: calc(50% + 28px); width: calc(100% - 56px);
  height: 2px; background: linear-gradient(to right, var(--primary), var(--primary-light));
}
.how-step:last-child .step-line { display: none; }
.how-step h4 { font-size: 15px; font-weight: 700; color: var(--navy); margin-bottom: 6px; }
.how-step p { font-size: 13px; color: var(--text-muted); }

/* ── Pricing ── */
.pricing-toggle { display: flex; align-items: center; justify-content: center; gap: 14px; margin-bottom: 48px; }
.pricing-toggle span { font-size: 14px; font-weight: 600; color: var(--text-muted); transition: var(--transition); }
.pricing-toggle span.active { color: var(--primary); }
.toggle-switch {
  width: 52px; height: 28px; background: var(--border); border-radius: 50px;
  position: relative; cursor: pointer; transition: var(--transition);
}
.toggle-switch.active { background: var(--primary); }
.toggle-switch::after {
  content: ''; position: absolute; top: 3px; left: 3px; width: 22px; height: 22px;
  background: #fff; border-radius: 50%; transition: var(--transition); box-shadow: var(--shadow-sm);
}
.toggle-switch.active::after { left: 27px; }
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: start; }
.pricing-card {
  background: var(--card); border-radius: 20px; padding: 36px 28px;
  border: 2px solid var(--border); transition: var(--transition); position: relative;
}
.pricing-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.pricing-card.popular {
  border-color: var(--primary); transform: scale(1.05);
  box-shadow: 0 20px 60px rgba(0,82,204,.15), 0 0 0 1px rgba(0,82,204,.1);
}
.pricing-card.popular:hover { transform: scale(1.05) translateY(-6px); }
.pricing-card .badge-pop {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--gradient-hero); color: #fff; padding: 6px 22px; border-radius: 50px;
  font-size: 12px; font-weight: 700; letter-spacing: .5px; white-space: nowrap;
}
.plan-name { font-size: 18px; font-weight: 800; color: var(--navy); margin-bottom: 4px; }
.plan-desc { font-size: 13px; color: var(--text-muted); margin-bottom: 20px; }
.price { font-size: 44px; font-weight: 900; color: var(--navy); line-height: 1; margin-bottom: 4px; }
.price small { font-size: 15px; font-weight: 500; color: var(--text-muted); }
.price .currency { font-size: 18px; vertical-align: super; }
.billing-note { font-size: 12px; color: var(--text-muted); margin-bottom: 24px; }
.features-list { list-style: none; margin-bottom: 28px; }
.features-list li {
  padding: 8px 0; font-size: 14px; color: var(--text); display: flex; align-items: center; gap: 10px;
  border-bottom: 1px solid rgba(0,0,0,.04);
}
.features-list li:last-child { border: none; }
.features-list .check { color: var(--accent); font-weight: 700; font-size: 15px; flex-shrink: 0; }
.features-list .x { color: #ccc; font-weight: 700; font-size: 15px; flex-shrink: 0; }
.features-list li.disabled { color: var(--text-muted); opacity: .5; }
.feat-badge {
  padding: 3px 6px; border-radius: 6px; font-size: 10px; font-weight: 800; 
  letter-spacing: 0.5px; margin-left: auto; line-height: 1; text-transform: uppercase;
}
.feat-new { background: rgba(0, 150, 199, 0.1); color: #0096C7; border: 1px solid rgba(0, 150, 199, 0.15); }
.feat-hot { background: rgba(255, 107, 53, 0.1); color: #FF6B35; border: 1px solid rgba(255, 107, 53, 0.15); }
.btn-plan {
  width: 100%; padding: 14px; border-radius: 50px; font-size: 15px; font-weight: 700;
  text-align: center; transition: var(--transition);
}
.btn-plan-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 15px rgba(0,82,204,.25); }
.btn-plan-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0,82,204,.35); }
.btn-plan-outline { background: transparent; color: var(--primary); border: 2px solid var(--border); }
.btn-plan-outline:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
.save-badge {
  display: inline-block; background: rgba(0,200,83,.12); color: var(--accent-dark);
  padding: 3px 10px; border-radius: 50px; font-size: 11px; font-weight: 700; margin-left: 6px;
}

/* ── Testimonials ── */
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.testimonial-card {
  background: var(--card); border-radius: 20px; padding: 32px;
  border: 1px solid var(--border); transition: var(--transition); position: relative;
}
.testimonial-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.t-quote-icon {
  position: absolute; top: 16px; right: 24px; font-size: 48px; font-weight: 900;
  color: rgba(0,82,204,.08); line-height: 1; font-family: Georgia, serif;
}
.stars { color: #FFB800; font-size: 15px; margin-bottom: 12px; letter-spacing: 2px; }
.quote { font-size: 14px; color: var(--text); line-height: 1.8; margin-bottom: 20px; }
.author { display: flex; align-items: center; gap: 12px; }
.avatar {
  width: 42px; height: 42px; border-radius: 50%; background: var(--gradient-hero);
  display: flex; align-items: center; justify-content: center; color: #fff;
  font-weight: 700; font-size: 14px; flex-shrink: 0;
}
.author-info .name { font-size: 14px; font-weight: 700; color: var(--navy); }
.author-info .role { font-size: 12px; color: var(--text-muted); }

/* ── CTA ── */
.cta-section {
  background: var(--gradient-hero); padding: 100px 0; text-align: center;
  position: relative; overflow: hidden;
}
.cta-bg { position: absolute; inset: 0; }
.cta-orb { position: absolute; border-radius: 50%; filter: blur(80px); }
.cta-orb-1 { width: 400px; height: 400px; top: -150px; right: -50px; background: rgba(0,82,204,.3); animation: orbFloat 12s ease-in-out infinite; }
.cta-orb-2 { width: 300px; height: 300px; bottom: -100px; left: -50px; background: rgba(0,200,83,.2); animation: orbFloat 15s ease-in-out infinite reverse; }
.cta-section h2 { font-size: 38px; font-weight: 900; color: #fff; margin-bottom: 16px; }
.cta-section p { font-size: 17px; color: rgba(255,255,255,.55); margin-bottom: 36px; }

/* ── Contact/Register ── */
.register-section { background: #fff; }
.register-grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 60px; align-items: start; }
.register-info h3 { font-size: 28px; font-weight: 900; color: var(--navy); margin-bottom: 16px; letter-spacing: -.5px; }
.register-info p { font-size: 15px; color: var(--text-muted); line-height: 1.8; margin-bottom: 24px; }
.contact-item { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.ci-icon {
  width: 44px; height: 44px; border-radius: 12px; display: flex; align-items: center;
  justify-content: center; background: rgba(0,82,204,.06); font-size: 20px; flex-shrink: 0;
}
.ci-text { font-size: 14px; }
.ci-text small { display: block; font-size: 11px; color: var(--text-muted); }
.register-form {
  background: var(--surface); border-radius: 20px; padding: 36px;
  border: 1px solid var(--border);
}
.register-form h3 { font-size: 20px; font-weight: 700; color: var(--navy); margin-bottom: 24px; text-align: center; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 5px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 14px; border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  font-size: 14px; font-family: inherit; transition: var(--transition); background: #fff;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(0,82,204,.08);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.btn-register {
  width: 100%; padding: 14px; background: var(--primary); color: #fff; border-radius: 50px;
  font-size: 15px; font-weight: 700; transition: var(--transition); margin-top: 6px;
}
.btn-register:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0,82,204,.3); }
.form-note { font-size: 12px; color: var(--text-muted); text-align: center; margin-top: 12px; }

/* ── Footer ── */
.footer { background: var(--navy); color: rgba(255,255,255,.5); padding: 60px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.f-logo { font-size: 20px; font-weight: 800; color: #fff; margin-bottom: 12px; }
.footer-brand p { font-size: 13px; line-height: 1.8; }
.footer h4 { color: #fff; font-size: 13px; font-weight: 700; margin-bottom: 14px; text-transform: uppercase; letter-spacing: .5px; }
.footer ul { list-style: none; }
.footer ul li { margin-bottom: 8px; }
.footer ul a { font-size: 13px; transition: var(--transition); }
.footer ul a:hover { color: var(--primary-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08); padding-top: 24px;
  display: flex; justify-content: space-between; font-size: 13px;
}

/* ── Toast ── */
.toast {
  position: fixed; bottom: 20px; right: 20px; z-index: 9999;
  padding: 16px 28px; border-radius: 12px; font-size: 14px; font-weight: 600;
  transform: translateY(100px); opacity: 0; transition: var(--transition);
  box-shadow: var(--shadow-lg);
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.ok { background: var(--accent); color: #fff; }
.toast.err { background: #E53935; color: #fff; }
.toast.warn { background: #FF9800; color: #fff; }

/* ── Animations ── */
.fade-up { opacity: 0; transform: translateY(30px); transition: opacity .7s, transform .7s; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-text p { margin: 0 auto 32px; }
  .hero-btns, .hero-trust { justify-content: center; }
  .hero-visual { margin-top: 40px; }
  .float-badge { display: none; }
  .features-grid, .eco-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .pricing-card.popular { transform: scale(1); }
  .pricing-card.popular:hover { transform: translateY(-6px); }
  .register-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open {
    display: flex; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--navy); padding: 20px; gap: 14px;
    border-bottom: 1px solid rgba(255,255,255,.1);
  }
  .hero { padding: 100px 0 120px; }
  .hero-text h1 { font-size: 32px; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); padding: 24px; }
  .features-grid, .testimonials-grid, .eco-grid { grid-template-columns: 1fr; }
  .how-grid { grid-template-columns: repeat(2, 1fr); }
  .step-line { display: none; }
  .section-header h2 { font-size: 28px; }
  .section { padding: 70px 0; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .eco-connect { flex-direction: column; border-radius: 16px; }
}

/* ── Floating Support Chat ── */
.floating-support {
  position: fixed; bottom: 30px; right: 30px;
  display: flex; flex-direction: column; gap: 16px; z-index: 9999;
}
.float-btn {
  display: flex; align-items: center; justify-content: center;
  width: 56px; height: 56px; border-radius: 50%;
  box-shadow: 0 6px 16px rgba(0,0,0,0.15);
  text-decoration: none; position: relative; transition: all 0.3s cubic-bezier(.4,0,.2,1);
}
.float-btn img { width: 34px; height: 34px; object-fit: contain; }
.float-btn .fb-icon { font-size: 24px; color: #fff; line-height: 1; }
.phone-btn { background: #00C853; animation: pulsePhone 2.5s infinite; }
.zalo-btn { background: #0068FF; }
.float-btn:hover { transform: scale(1.1); }
.fb-label {
  position: absolute; right: 70px; background: rgba(0,0,0,0.8); color: #fff;
  padding: 6px 14px; border-radius: 8px; font-size: 13px; font-weight: 600;
  white-space: nowrap; opacity: 0; pointer-events: none; transition: 0.3s;
}
.float-btn:hover .fb-label { opacity: 1; right: 65px; }

@keyframes pulsePhone {
  0% { box-shadow: 0 0 0 0 rgba(0, 200, 83, 0.5); }
  70% { box-shadow: 0 0 0 15px rgba(0, 200, 83, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 200, 83, 0); }
}

@media (max-width: 600px) {
  .floating-support { bottom: 20px; right: 20px; transform: scale(0.9); transform-origin: bottom right; gap: 12px; }
  .float-btn:hover .fb-label { display: none; }
}