/* ==========================================
   TUVANAI - Đào Tạo AI Thực Chiến
   Premium Sales Website CSS
   ========================================== */

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

/* === VARIABLES === */
:root {
  --dark: #070B14;
  --dark-2: #0D1526;
  --dark-3: #111827;
  --dark-4: #1E293B;
  --cyan: #06B6D4;
  --cyan-light: #67E8F9;
  --purple: #8B5CF6;
  --purple-light: #C4B5FD;
  --gold: #F59E0B;
  --gold-light: #FCD34D;
  --red: #EF4444;
  --green: #10B981;
  --text: #F8FAFC;
  --text-muted: #94A3B8;
  --text-dim: #64748B;
  --border: rgba(255,255,255,0.08);
  --border-cyan: rgba(6,182,212,0.3);
  --gradient: linear-gradient(135deg, #06B6D4, #8B5CF6);
  --gradient-gold: linear-gradient(135deg, #F59E0B, #EF4444);
  --gradient-dark: linear-gradient(180deg, #070B14 0%, #0D1526 100%);
  --glass: rgba(255,255,255,0.04);
  --glass-border: rgba(255,255,255,0.08);
  --shadow-cyan: 0 0 40px rgba(6,182,212,0.2);
  --shadow-purple: 0 0 40px rgba(139,92,246,0.2);
  --radius: 16px;
  --radius-sm: 8px;
  --radius-lg: 24px;
}

/* === RESET & BASE === */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', sans-serif;
  background: var(--dark);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  /* Prevent black gaps on mobile scroll */
  min-height: 100vh;
  position: relative;
}
/* Ensure all sections have background to prevent black gaps */
section, footer, nav, div[id] {
  background-clip: padding-box;
}
h1,h2,h3,h4,h5 { font-family: 'Space Grotesk', sans-serif; line-height: 1.2; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; font-family: 'Inter', sans-serif; border: none; outline: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section-pad { padding: 100px 0; }
.section-pad-sm { padding: 60px 0; }

/* === SECTION LABELS === */
.section-label {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(6,182,212,0.1); border: 1px solid var(--border-cyan);
  color: var(--cyan); font-size: 13px; font-weight: 600;
  letter-spacing: 1px; text-transform: uppercase;
  padding: 6px 16px; border-radius: 100px; margin-bottom: 20px;
}
.section-title {
  font-size: clamp(32px, 5vw, 52px); font-weight: 700;
  margin-bottom: 16px; color: var(--text);
}
.section-title span { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.section-sub { font-size: 18px; color: var(--text-muted); max-width: 600px; line-height: 1.7; }
.text-center { text-align: center; }
.text-center .section-sub { margin: 0 auto; }

/* === BUTTONS === */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 600; font-size: 16px; padding: 14px 32px;
  border-radius: 100px; transition: all 0.3s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--gradient); color: white;
  box-shadow: 0 4px 24px rgba(6,182,212,0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(6,182,212,0.5); }
.btn-secondary {
  background: transparent; color: var(--text);
  border: 1.5px solid var(--border-cyan);
}
.btn-secondary:hover { background: rgba(6,182,212,0.1); border-color: var(--cyan); }
.btn-gold {
  background: var(--gradient-gold); color: white;
  box-shadow: 0 4px 24px rgba(245,158,11,0.4);
}
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(245,158,11,0.5); }
.btn-lg { padding: 18px 40px; font-size: 18px; }
.btn-sm { padding: 10px 20px; font-size: 14px; }

/* === NAVIGATION === */
#navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 16px 0;
  transition: all 0.3s ease;
}
#navbar.scrolled {
  background: rgba(7,11,20,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
}
.nav-logo-icon {
  width: 40px; height: 40px; border-radius: 10px;
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 700; color: white;
  font-family: 'Space Grotesk', sans-serif;
}
.nav-logo-text { font-family: 'Space Grotesk', sans-serif; font-size: 20px; font-weight: 700; }
.nav-logo-text span { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav-links {
  display: flex; align-items: center; gap: 32px;
}
.nav-links a { font-size: 15px; color: var(--text-muted); font-weight: 500; transition: color 0.2s; }
.nav-links a:hover { color: var(--cyan); }
.nav-cta { display: flex; align-items: center; gap: 12px; }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; }
.hamburger span { width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: all 0.3s; }

/* === HERO === */
#hero {
  min-height: 100vh; display: flex; align-items: center;
  position: relative; overflow: hidden; padding-top: 80px;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(6,182,212,0.15) 0%, transparent 70%),
              radial-gradient(ellipse 60% 50% at 80% 60%, rgba(139,92,246,0.1) 0%, transparent 60%),
              var(--dark);
}
.hero-grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(var(--border) 1px, transparent 1px),
                    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.4;
}
.hero-inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 60px; align-items: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(6,182,212,0.1); border: 1px solid var(--border-cyan);
  color: var(--cyan); font-size: 13px; font-weight: 600;
  padding: 6px 16px; border-radius: 100px; margin-bottom: 24px;
}
.hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }
.hero-h1 { font-size: clamp(36px, 5.5vw, 64px); font-weight: 700; margin-bottom: 24px; }
.hero-h1 .highlight { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-h1 .gold { background: var(--gradient-gold); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-sub { font-size: 18px; color: var(--text-muted); line-height: 1.8; margin-bottom: 36px; max-width: 520px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats { display: flex; gap: 32px; }
.hero-stat { border-right: 1px solid var(--border); padding-right: 32px; }
.hero-stat:last-child { border-right: none; padding-right: 0; }
.hero-stat-num { font-family: 'Space Grotesk', sans-serif; font-size: 32px; font-weight: 700; }
.hero-stat-num span { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-stat-label { font-size: 13px; color: var(--text-muted); }
.hero-image {
  position: relative;
}
.hero-img-wrap {
  border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-cyan), 0 40px 80px rgba(0,0,0,0.5);
  aspect-ratio: 4/5;
}
.hero-img-wrap img { width: 100%; height: 100%; object-fit: cover; }
.hero-float-card {
  position: absolute;
  background: var(--dark-2); border: 1px solid var(--border-cyan);
  border-radius: var(--radius); padding: 16px 20px;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-cyan);
}
.hero-float-card.card-1 { bottom: -20px; left: -30px; }
.hero-float-card.card-2 { top: 40px; right: -30px; }
.float-card-inner { display: flex; align-items: center; gap: 12px; }
.float-card-icon { font-size: 28px; }
.float-card-text strong { display: block; font-size: 15px; font-weight: 600; color: var(--text); }
.float-card-text span { font-size: 12px; color: var(--text-muted); }

/* === TRUST BAR === */
#trust-bar {
  padding: 24px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--dark-2);
}
.trust-bar-inner { display: flex; align-items: center; justify-content: center; gap: 48px; flex-wrap: wrap; }
.trust-item { display: flex; align-items: center; gap: 10px; color: var(--text-muted); font-size: 14px; }
.trust-item .icon { font-size: 20px; }
.trust-item strong { color: var(--text); font-weight: 600; }

/* === PAIN POINTS === */
#pain-points { background: var(--dark-2); }
.pain-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; margin-top: 48px; }
.pain-card {
  background: var(--glass); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 36px 28px;
  transition: all 0.3s ease;
  position: relative; overflow: hidden;
}
.pain-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--gradient-gold);
}
.pain-card:hover { border-color: rgba(245,158,11,0.3); transform: translateY(-4px); }
.pain-emoji { font-size: 48px; margin-bottom: 20px; display: block; }
.pain-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.pain-card p { color: var(--text-muted); line-height: 1.7; font-size: 15px; }

/* === SOLUTION === */
#solution { background: var(--dark); }
.solution-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; margin-top: 60px; }
.solution-steps { display: flex; flex-direction: column; gap: 24px; }
.solution-step {
  display: flex; gap: 20px;
  background: var(--glass); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  transition: all 0.3s;
}
.solution-step:hover { border-color: var(--border-cyan); background: rgba(6,182,212,0.05); }
.step-num {
  width: 48px; height: 48px; flex-shrink: 0;
  border-radius: 12px; background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  font-family: 'Space Grotesk', sans-serif; font-size: 18px; font-weight: 700;
}
.step-content h4 { font-size: 17px; font-weight: 600; margin-bottom: 6px; }
.step-content p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }
.solution-visual {
  background: var(--dark-2); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 40px;
  text-align: center;
}
.method-circle {
  width: 200px; height: 200px; border-radius: 50%;
  margin: 0 auto 32px;
  background: conic-gradient(var(--gradient-gold) 0% 30%, var(--gradient) 30% 100%);
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.method-circle-inner {
  width: 150px; height: 150px; border-radius: 50%;
  background: var(--dark-2);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.method-circle-inner strong { font-size: 28px; font-weight: 700; font-family: 'Space Grotesk', sans-serif; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.method-circle-inner span { font-size: 11px; color: var(--text-muted); }
.method-legend { display: flex; justify-content: center; gap: 24px; margin-top: 20px; }
.legend-item { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.legend-dot { width: 12px; height: 12px; border-radius: 3px; }
.legend-dot.theory { background: var(--gold); }
.legend-dot.practice { background: var(--cyan); }
.outcome-list { margin-top: 28px; display: flex; flex-direction: column; gap: 12px; }
.outcome-item { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--text-muted); }
.outcome-item .check { color: var(--green); font-size: 16px; }

/* === ABOUT === */
#about {
  background: var(--dark-2);
  position: relative; overflow: hidden;
}
.about-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 80px; align-items: center; }
.about-img-wrap {
  border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--border-cyan);
  box-shadow: var(--shadow-cyan);
  aspect-ratio: 3/4;
  position: relative;
}
.about-img-wrap img { width: 100%; height: 100%; object-fit: cover; }
.about-img-badge {
  position: absolute; bottom: 24px; left: 24px; right: 24px;
  background: rgba(7,11,20,0.9); border: 1px solid var(--border-cyan);
  backdrop-filter: blur(20px); border-radius: var(--radius);
  padding: 16px 20px;
}
.about-img-badge strong { display: block; font-size: 16px; font-weight: 700; }
.about-img-badge span { font-size: 13px; color: var(--cyan); }
.about-content h2 { font-size: clamp(28px, 4vw, 42px); font-weight: 700; margin-bottom: 8px; }
.about-title { font-size: 16px; color: var(--cyan); font-weight: 600; margin-bottom: 20px; }
.about-desc { color: var(--text-muted); line-height: 1.8; font-size: 16px; margin-bottom: 28px; }
.about-creds { display: flex; flex-direction: column; gap: 14px; margin-bottom: 32px; }
.cred-item { display: flex; align-items: flex-start; gap: 12px; font-size: 15px; }
.cred-icon { font-size: 20px; flex-shrink: 0; }
.cred-text strong { color: var(--text); font-weight: 600; }
.cred-text p { color: var(--text-muted); font-size: 14px; margin-top: 2px; }
.about-stats { display: flex; gap: 32px; padding-top: 28px; border-top: 1px solid var(--border); }
.about-stat-num { font-family: 'Space Grotesk', sans-serif; font-size: 36px; font-weight: 700; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.about-stat-label { font-size: 13px; color: var(--text-muted); margin-top: 2px; }

/* === GALLERY === */
#gallery { background: var(--dark); }
.gallery-grid { display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: auto auto; gap: 20px; margin-top: 48px; }
.gallery-item {
  border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border);
  position: relative; cursor: pointer;
  transition: all 0.3s;
}
.gallery-item:hover { border-color: var(--border-cyan); transform: scale(1.01); }
.gallery-item.featured { grid-row: span 2; }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; min-height: 240px; }
.gallery-item.featured img { min-height: 100%; }
.gallery-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(7,11,20,0.9) 0%, transparent 60%);
  opacity: 0; transition: opacity 0.3s;
  display: flex; align-items: flex-end; padding: 24px;
}
.gallery-item:hover .gallery-overlay { opacity: 1; }
.gallery-label { font-size: 14px; font-weight: 600; color: var(--cyan); }

/* === PRICING === */
#pricing { background: var(--dark-2); }
.pricing-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; margin-top: 48px; }
.pricing-card {
  background: var(--dark-3); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 36px 28px;
  position: relative; transition: all 0.3s; display: flex; flex-direction: column;
}
.pricing-card:hover { transform: translateY(-6px); }
.pricing-card.popular {
  border-color: var(--cyan); background: rgba(6,182,212,0.05);
  box-shadow: var(--shadow-cyan);
}
.popular-badge {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--gradient); color: white; font-size: 12px; font-weight: 700;
  padding: 4px 16px; border-radius: 100px; letter-spacing: 0.5px; white-space: nowrap;
}
.pricing-icon { font-size: 40px; margin-bottom: 16px; }
.pricing-name { font-size: 22px; font-weight: 700; margin-bottom: 6px; }
.pricing-desc { font-size: 14px; color: var(--text-muted); margin-bottom: 24px; }
.pricing-price { margin-bottom: 28px; }
.price-old { font-size: 14px; color: var(--text-dim); text-decoration: line-through; margin-bottom: 4px; }
.price-current { font-family: 'Space Grotesk', sans-serif; font-size: 36px; font-weight: 700; }
.price-current span { font-size: 14px; font-weight: 400; color: var(--text-muted); }
.popular .price-current { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.pricing-features { display: flex; flex-direction: column; gap: 12px; margin-bottom: 32px; flex: 1; }
.feature-item { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; color: var(--text-muted); }
.feature-item.active { color: var(--text); }
.feature-item .fi-check { color: var(--green); flex-shrink: 0; }
.feature-item .fi-x { color: var(--text-dim); flex-shrink: 0; }
.pricing-card .btn { width: 100%; justify-content: center; }
.pricing-note { text-align: center; margin-top: 32px; font-size: 14px; color: var(--text-muted); }
.pricing-note a { color: var(--cyan); }

/* === TESTIMONIALS === */
#testimonials { background: var(--dark); }
.testimonials-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; margin-top: 48px; }
.testi-card {
  background: var(--dark-2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px 28px;
  transition: all 0.3s;
}
.testi-card:hover { border-color: var(--border-cyan); }
.testi-stars { display: flex; gap: 4px; margin-bottom: 16px; }
.testi-stars span { color: var(--gold); font-size: 16px; }
.testi-text { font-size: 15px; line-height: 1.8; color: var(--text-muted); margin-bottom: 24px; font-style: italic; }
.testi-text strong { color: var(--cyan); font-style: normal; }
.testi-author { display: flex; align-items: center; gap: 12px; }
.testi-avatar { width: 48px; height: 48px; border-radius: 50%; background: var(--gradient); display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 18px; flex-shrink: 0; }
.testi-name { font-size: 15px; font-weight: 600; }
.testi-role { font-size: 13px; color: var(--text-muted); margin-top: 2px; }

/* === FAQ === */
#faq { background: var(--dark-2); }
.faq-grid { max-width: 800px; margin: 48px auto 0; display: flex; flex-direction: column; gap: 16px; }
.faq-item {
  background: var(--dark-3); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  transition: border-color 0.3s;
}
.faq-item.open { border-color: var(--border-cyan); }
.faq-question {
  width: 100%; text-align: left; padding: 24px 28px;
  background: none; color: var(--text);
  font-family: 'Inter', sans-serif; font-size: 16px; font-weight: 600;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  cursor: pointer; transition: color 0.2s;
}
.faq-item.open .faq-question { color: var(--cyan); }
.faq-icon { font-size: 20px; transition: transform 0.3s; flex-shrink: 0; color: var(--cyan); }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s;
  padding: 0 28px; color: var(--text-muted); font-size: 15px; line-height: 1.8;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 28px 24px; }

/* === CTA / REGISTER === */
#register {
  background: var(--dark);
  position: relative; overflow: hidden;
}
#register::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 50%, rgba(6,182,212,0.08) 0%, transparent 70%);
}
.register-inner { position: relative; z-index: 1; }
.register-box {
  background: var(--dark-2); border: 1px solid var(--border-cyan);
  border-radius: var(--radius-lg); padding: 60px;
  box-shadow: var(--shadow-cyan);
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.register-content h2 { font-size: clamp(28px, 4vw, 42px); font-weight: 700; margin-bottom: 16px; }
.register-content p { color: var(--text-muted); font-size: 16px; line-height: 1.7; margin-bottom: 28px; }
.register-benefits { display: flex; flex-direction: column; gap: 12px; }
.reg-benefit { display: flex; align-items: center; gap: 10px; font-size: 15px; }
.reg-benefit .check { color: var(--green); }
.register-form { display: flex; flex-direction: column; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 13px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.form-group input, .form-group select, .form-group textarea {
  background: var(--dark-3); border: 1.5px solid var(--border);
  border-radius: var(--radius-sm); padding: 14px 16px;
  color: var(--text); font-family: 'Inter', sans-serif; font-size: 15px;
  transition: border-color 0.2s;
  width: 100%;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--cyan);
}
.form-group select option { background: var(--dark-3); }
.form-group textarea { resize: vertical; min-height: 80px; }
.form-submit { width: 100%; justify-content: center; }
.form-note { font-size: 13px; color: var(--text-dim); text-align: center; }

/* === FLOATING CTA === */
#floating-cta {
  position: fixed; bottom: 32px; right: 32px; z-index: 999;
  display: flex; flex-direction: column; gap: 12px; align-items: flex-end;
  opacity: 0; transform: translateY(20px);
  transition: all 0.4s ease;
  pointer-events: none;
}
#floating-cta.visible { opacity: 1; transform: translateY(0); pointer-events: all; }
.float-btn {
  display: flex; align-items: center; gap: 10px;
  background: #25D366; color: white;
  padding: 12px 20px; border-radius: 100px;
  font-size: 14px; font-weight: 600;
  box-shadow: 0 4px 20px rgba(37,211,102,0.4);
  transition: all 0.3s; text-decoration: none;
}
.float-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,211,102,0.5); }
.float-btn.zalo { background: #0068FF; box-shadow: 0 4px 20px rgba(0,104,255,0.4); }
.float-btn.zalo:hover { box-shadow: 0 8px 24px rgba(0,104,255,0.5); }
.float-btn-icon { font-size: 20px; }

/* === FOOTER === */
footer {
  background: var(--dark-2); border-top: 1px solid var(--border);
  padding: 60px 0 32px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }

.footer-brand .nav-logo { margin-bottom: 16px; }
.footer-brand p { color: var(--text-muted); font-size: 14px; line-height: 1.7; max-width: 280px; }
.footer-col h4 { font-size: 15px; font-weight: 700; margin-bottom: 20px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 14px; color: var(--text-muted); transition: color 0.2s; }
.footer-links a:hover { color: var(--cyan); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 32px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
.footer-bottom p { font-size: 14px; color: var(--text-dim); }
.footer-bottom a { color: var(--cyan); }

/* === URGENCY BANNER === */
.urgency-bar {
  background: linear-gradient(90deg, rgba(245,158,11,0.15), rgba(239,68,68,0.15));
  border-top: 1px solid rgba(245,158,11,0.3);
  border-bottom: 1px solid rgba(245,158,11,0.3);
  padding: 12px 0; text-align: center;
  font-size: 14px; font-weight: 600;
}
.urgency-bar span { color: var(--gold); }

/* === ANIMATIONS === */
.fade-in {
  opacity: 0;
  transform: translateY(18px); /* Giảm từ 30px → 18px cho mượt hơn */
  transition: opacity 0.55s ease, transform 0.55s ease;
  will-change: opacity, transform;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
  will-change: auto; /* Release after visible */
}
.fade-in-delay-1 { transition-delay: 0.08s; }
.fade-in-delay-2 { transition-delay: 0.16s; }
.fade-in-delay-3 { transition-delay: 0.24s; }

/* =============================================
   PARTNERS MARQUEE (Logo đối tác)
   ============================================= */
#partners {
  background: var(--dark-2);
  padding: 48px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.partners-header {
  text-align: center;
  margin-bottom: 32px;
}
.partners-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 2px;
}
.marquee-track {
  display: flex;
  gap: 0;
  width: max-content;
  animation: marqueeScroll 28s linear infinite;
}
.marquee-track:hover { animation-play-state: paused; }
@keyframes marqueeScroll {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
.partner-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  margin: 0 8px;
  white-space: nowrap;
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  transition: all 0.3s;
  cursor: default;
  flex-shrink: 0;
}
.partner-item:hover {
  border-color: var(--border-cyan);
  color: var(--text);
  background: rgba(6,182,212,0.06);
}
.partner-icon { font-size: 18px; flex-shrink: 0; }

/* =============================================
   AI PYRAMID SECTION
   ============================================= */
#ai-pyramid {
  background: var(--dark);
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}
#ai-pyramid::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 70% 50% at 50% 50%, rgba(139,92,246,0.08) 0%, transparent 70%);
}
.pyramid-inner {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  margin-top: 60px;
}

/* -- Triangle pyramid visual -- */
.pyramid-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  position: relative;
}
.pyramid-tier {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  width: 100%;
  transition: all 0.3s;
}
.pyramid-tier:hover { filter: brightness(1.1); }

.pyramid-shape {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  clip-path: none;
}

/* Top tier - 15% */
.pyramid-tier.tier-top .pyramid-shape {
  background: linear-gradient(135deg, #10B981, #06B6D4);
  width: 240px; height: 120px;
  clip-path: polygon(20% 100%, 80% 100%, 50% 0%);
  /* fallback */
}
/* Visual dạng trapezoid từ trên xuống */
.pyramid-block {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 4px;
}
.pyramid-polygon {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px 32px;
  font-weight: 700;
  color: white;
  border-radius: 12px;
  flex: 1;
  overflow: hidden;
}
/* Tier-specific widths via margin to simulate pyramid shape */
.tier-elite   .pyramid-polygon { background: linear-gradient(135deg, #10B981, #06B6D4); margin: 0 100px; }
.tier-middle  .pyramid-polygon { background: linear-gradient(135deg, #F59E0B, #EF4444); margin: 0 40px; }
.tier-bottom  .pyramid-polygon { background: linear-gradient(135deg, #475569, #334155); margin: 0; }

.pyramid-polygon::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(to right, rgba(255,255,255,0.05), transparent);
}
.pyramid-pct {
  font-size: 28px; font-weight: 900;
  font-family: 'Space Grotesk', sans-serif;
  display: block;
  line-height: 1;
}
.pyramid-label {
  font-size: 13px;
  font-weight: 600;
  opacity: 0.9;
  display: block;
  margin-top: 4px;
}
.pyramid-tag {
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
  flex-shrink: 0;
}
.pyramid-tag.green  { background: rgba(16,185,129,0.15); color: #10B981; border: 1px solid rgba(16,185,129,0.3); }
.pyramid-tag.orange { background: rgba(245,158,11,0.15); color: #F59E0B; border: 1px solid rgba(245,158,11,0.3); }
.pyramid-tag.gray   { background: rgba(71,85,105,0.3);   color: #94A3B8;  border: 1px solid rgba(71,85,105,0.4); }

/* YOU ARE HERE badge */
.you-are-here {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  font-size: 12px;
  font-weight: 700;
  color: #F59E0B;
  animation: blink 1.5s ease-in-out infinite;
}
.you-are-here::before {
  content: '▶';
  font-size: 10px;
}
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

/* -- Right side stats bars -- */
.pyramid-stats {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.pstat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.pstat-title {
  display: flex;
  align-items: center;
  gap: 10px;
}
.pstat-emoji { font-size: 24px; }
.pstat-name  { font-size: 16px; font-weight: 700; }
.pstat-desc  { font-size: 13px; color: var(--text-muted); margin-top: 2px; }
.pstat-pct   {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 28px; font-weight: 900;
}
.pstat-pct.green  { color: #10B981; }
.pstat-pct.orange { color: #F59E0B; }
.pstat-pct.gray   { color: #64748B; }

.pyramid-bar-bg {
  height: 12px;
  background: rgba(255,255,255,0.05);
  border-radius: 100px;
  overflow: hidden;
}
.pyramid-bar-fill {
  height: 100%;
  border-radius: 100px;
  width: 0%;
  transition: width 1.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.pyramid-bar-fill.green  { background: linear-gradient(90deg, #10B981, #06B6D4); }
.pyramid-bar-fill.orange { background: linear-gradient(90deg, #F59E0B, #EF4444); }
.pyramid-bar-fill.gray   { background: linear-gradient(90deg, #475569, #334155); }

/* -- CTA box -- */
.pyramid-cta {
  margin-top: 60px;
  padding: 40px;
  background: linear-gradient(135deg, rgba(245,158,11,0.08), rgba(239,68,68,0.08));
  border: 1px solid rgba(245,158,11,0.25);
  border-radius: var(--radius-lg);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.pyramid-cta::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 60% at 50% 0%, rgba(245,158,11,0.12) 0%, transparent 70%);
}
.pyramid-cta > * { position: relative; z-index: 1; }
.pyramid-cta-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(239,68,68,0.15); border: 1px solid rgba(239,68,68,0.3);
  color: #EF4444; font-size: 12px; font-weight: 700;
  padding: 6px 16px; border-radius: 100px;
  letter-spacing: 0.5px; text-transform: uppercase; margin-bottom: 16px;
}
.pyramid-cta h3 {
  font-size: clamp(22px, 3vw, 32px); font-weight: 800; margin-bottom: 12px;
}
.pyramid-cta h3 span {
  background: var(--gradient-gold); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.pyramid-cta p {
  font-size: 16px; color: var(--text-muted); line-height: 1.7; max-width: 600px; margin: 0 auto 28px;
}
.pyramid-cta-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.pcs-item { text-align: center; }
.pcs-num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 36px; font-weight: 900;
  background: var(--gradient-gold); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.pcs-label { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

/* =============================================
   ROADMAP TIMELINE SECTION
   ============================================= */
#roadmap {
  background: var(--dark-2);
  padding: 100px 0;
}
.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 60px;
  position: relative;
}
.roadmap-grid::before {
  content: '';
  position: absolute;
  top: 44px; left: 12.5%; right: 12.5%;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  z-index: 0;
}
.roadmap-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0 16px;
  position: relative;
  z-index: 1;
}
.roadmap-num {
  width: 88px; height: 88px;
  border-radius: 50%;
  background: var(--dark-2);
  border: 2px solid var(--border-cyan);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  position: relative;
  transition: all 0.3s;
}
.roadmap-step:hover .roadmap-num {
  background: rgba(6,182,212,0.1);
  box-shadow: var(--shadow-cyan);
  transform: translateY(-4px);
}
.roadmap-step:nth-child(1) .roadmap-num { background: linear-gradient(135deg,rgba(6,182,212,0.15),rgba(6,182,212,0.05)); border-color: var(--cyan); }
.roadmap-step:nth-child(2) .roadmap-num { background: linear-gradient(135deg,rgba(139,92,246,0.15),rgba(139,92,246,0.05)); border-color: var(--purple); }
.roadmap-step:nth-child(3) .roadmap-num { background: linear-gradient(135deg,rgba(245,158,11,0.15),rgba(245,158,11,0.05)); border-color: var(--gold); }
.roadmap-step:nth-child(4) .roadmap-num { background: linear-gradient(135deg,rgba(16,185,129,0.15),rgba(16,185,129,0.05)); border-color: var(--green); }

.roadmap-week {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
  margin-bottom: 2px;
}
.roadmap-week-num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 22px; font-weight: 900;
  color: var(--text);
  line-height: 1;
}
.roadmap-icon { font-size: 22px; margin-bottom: 12px; }
.roadmap-title {
  font-size: 16px; font-weight: 700;
  margin-bottom: 8px; color: var(--text);
}
.roadmap-desc {
  font-size: 13px; color: var(--text-muted); line-height: 1.6;
}
.roadmap-outcome {
  margin-top: 12px;
  padding: 8px 14px;
  background: rgba(6,182,212,0.08);
  border: 1px solid rgba(6,182,212,0.2);
  border-radius: 100px;
  font-size: 12px; font-weight: 600; color: var(--cyan);
  white-space: nowrap;
}
.roadmap-step:nth-child(2) .roadmap-outcome { background: rgba(139,92,246,0.08); border-color: rgba(139,92,246,0.2); color: var(--purple-light); }
.roadmap-step:nth-child(3) .roadmap-outcome { background: rgba(245,158,11,0.08); border-color: rgba(245,158,11,0.2); color: var(--gold-light); }
.roadmap-step:nth-child(4) .roadmap-outcome { background: rgba(16,185,129,0.08); border-color: rgba(16,185,129,0.2); color: #6EE7B7; }

/* =============================================
   RESPONSIVE — NEW SECTIONS
   ============================================= */
/* === RESPONSIVE === */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-sub { margin: 0 auto 36px; }
  .hero-btns { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-image { display: none; }
  .solution-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-img-wrap { max-width: 400px; margin: 0 auto; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .pyramid-inner { grid-template-columns: 1fr; }
  .roadmap-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 768px) {
  .section-pad { padding: 60px 0; }
  .pain-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 400px; margin: 48px auto 0; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
  .gallery-item.featured { grid-row: span 1; }
  .register-box { grid-template-columns: 1fr; padding: 32px 24px; }
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }
  .about-stats { gap: 20px; flex-wrap: wrap; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  #floating-cta { bottom: 16px; right: 16px; }
  .trust-bar-inner { gap: 24px; }
  .survey-wrap { padding: 32px 20px; }
  .survey-form { padding: 0; }
  .roadmap-grid { grid-template-columns: 1fr 1fr; }
  /* Fix mobile black gaps */
  #hero, #pain-points, #solution, #about, #gallery, #pricing, #testimonials, #faq, #survey, #register, #ai-pyramid, #roadmap {
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
  }
  .fade-in {
    transform: translateY(10px);
    transition: opacity 0.4s ease, transform 0.4s ease;
  }
  .hero-img-wrap, .survey-wrap, .register-box {
    box-shadow: none;
  }

  /* =============================================
     FIX LỖI MOBILE — WEBKAIZEN 12/04/2026
     =============================================
     Bug 1: Hero badge bị cắt phải — cho phép wrap
     Bug 2: Button CTA tràn khỏi màn hình
     Bug 3: Stats (95% Hài Lòng) bị cắt — grid 2x2
     ============================================= */

  /* Bug 1: Hero badge — cho phép xuống dòng, không tràn */
  .hero-badge {
    white-space: normal;
    text-align: center;
    max-width: 100%;
    box-sizing: border-box;
    line-height: 1.5;
  }

  /* Bug 2: Buttons không tràn màn hình */
  .hero-btns {
    flex-direction: column;
    align-items: center;
    gap: 12px;
    width: 100%;
  }
  .hero-btns .btn {
    width: 100%;
    max-width: 340px;
    justify-content: center;
    white-space: normal;
    text-align: center;
    box-sizing: border-box;
  }

  /* Bug 3: Stats 4 items — hiển thị dạng grid 2x2 */
  .hero-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px 24px;
    width: 100%;
    max-width: 320px;
    margin: 0 auto;
  }
  .hero-stat {
    border-right: none;
    padding-right: 0;
    text-align: center;
  }
  .hero-stat-num { font-size: 26px; }
  .hero-stat-label { font-size: 12px; }
}

/* ── Extra small: <= 480px ─────────────────────────────── */
@media (max-width: 480px) {
  .container { padding: 0 16px; }

  /* Hero heading — thu nhỏ để vừa màn hình */
  .hero-h1 { font-size: 30px; }

  /* Badge không tràn */
  .hero-badge {
    font-size: 11px;
    padding: 6px 12px;
  }

  /* Section title */
  .section-title { font-size: 26px; }
  .section-sub { font-size: 15px; }

  /* Pricing cards full width */
  .pricing-grid { max-width: 100%; }

  /* Roadmap 1 col trên màn hình rất nhỏ */
  .roadmap-grid { grid-template-columns: 1fr; }

  /* Pyramid tags không tràn */
  .pyramid-tag { font-size: 10px; padding: 4px 10px; }

  /* Trust bar xuống 1 cột */
  .trust-bar-inner { flex-direction: column; align-items: flex-start; gap: 12px; }

  /* FAQ question padding thu nhỏ */
  .faq-question { padding: 16px 20px; font-size: 14px; }

  /* Survey float: thu nhỏ trên màn nhỏ, KHÔNG ẩn */
  #survey-float {
    left: 8px;
    right: 8px;
    bottom: 12px;
    max-width: none;
    border-radius: 14px;
    padding: 12px 14px;
  }
}

/* =============================================
   SURVEY FORM — DANH SÁCH CHỜ
   ============================================= */
#survey {
  background: var(--dark-2);
  position: relative;
  overflow: hidden;
  /* Fix: khi scroll đến #survey qua anchor link, form hiện trong viewport */
  scroll-margin-top: 80px;
  padding-top: 60px; /* giảm từ mặc định section-pad 100px */
  padding-bottom: 80px;
}
#survey::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% 0%, rgba(245,158,11,0.06) 0%, transparent 70%);
}
.survey-wrap {
  position: relative; z-index: 1;
  max-width: 760px;
  margin: 48px auto 0;
  background: var(--dark-3);
  border: 1px solid rgba(245,158,11,0.25);
  border-radius: var(--radius-lg);
  padding: 48px 52px;
  box-shadow: 0 0 60px rgba(245,158,11,0.08);
}
.survey-badge-row {
  text-align: center;
  margin-bottom: 36px;
}
.survey-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(245,158,11,0.1);
  border: 1px solid rgba(245,158,11,0.35);
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
  padding: 8px 20px;
  border-radius: 100px;
  letter-spacing: 0.3px;
}
.survey-form {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.survey-question {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}
.survey-question:last-of-type { border-bottom: none; padding-bottom: 0; }
.sq-label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.5;
  cursor: default;
}
.sq-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 32px;
  background: var(--gradient-gold);
  border-radius: 8px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 13px;
  font-weight: 800;
  color: white;
  flex-shrink: 0;
  margin-top: 2px;
}
.sq-input, .sq-textarea {
  background: var(--dark-4);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: 15px;
  transition: border-color 0.2s, box-shadow 0.2s;
  width: 100%;
}
.sq-input:focus, .sq-textarea:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(245,158,11,0.12);
}
.sq-input::placeholder, .sq-textarea::placeholder { color: var(--text-dim); }
.sq-textarea { resize: vertical; min-height: 88px; }
.sq-radio-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.sq-radio-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--dark-4);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 15px;
  color: var(--text-muted);
}
.sq-radio-item:hover {
  border-color: rgba(245,158,11,0.4);
  background: rgba(245,158,11,0.05);
  color: var(--text);
}
.sq-radio-item input[type="radio"] { display: none; }
.sq-radio-item input[type="radio"]:checked ~ .sq-radio-box {
  background: var(--gradient-gold);
  border-color: var(--gold);
}
.sq-radio-item:has(input:checked) {
  border-color: var(--gold);
  background: rgba(245,158,11,0.08);
  color: var(--text);
}
.sq-radio-box {
  width: 18px; height: 18px;
  border-radius: 50%;
  border: 2px solid var(--border);
  flex-shrink: 0;
  transition: all 0.2s;
}
.survey-submit {
  width: 100%;
  justify-content: center;
  font-size: 17px;
  padding: 20px 32px;
  border-radius: 12px;
}
.survey-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

/* =============================================
   FLOATING SURVEY BANNER
   ============================================= */
#survey-float {
  position: fixed;
  bottom: 32px;
  left: 32px;
  z-index: 998;
  background: linear-gradient(135deg, #1a1200, #2a1a00);
  border: 1.5px solid rgba(245,158,11,0.5);
  border-radius: 20px;
  padding: 16px 20px;
  box-shadow: 0 8px 32px rgba(245,158,11,0.2), 0 2px 8px rgba(0,0,0,0.5);
  max-width: 320px;
  cursor: pointer; /* FIX: toàn banner clickable */
  /* Hidden by default */
  opacity: 0;
  transform: translateY(24px) scale(0.96);
  pointer-events: none;
  transition: opacity 0.4s ease, transform 0.4s ease;
}
#survey-float.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: all;
  animation: surveyPulse 3s ease-in-out 1.5s infinite;
}
@keyframes surveyPulse {
  0%, 100% { box-shadow: 0 8px 32px rgba(245,158,11,0.2), 0 2px 8px rgba(0,0,0,0.5); }
  50% { box-shadow: 0 8px 48px rgba(245,158,11,0.45), 0 2px 8px rgba(0,0,0,0.5); }
}
.survey-float-close {
  position: absolute;
  top: 10px; right: 12px;
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 14px;
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 4px;
  line-height: 1;
  transition: color 0.2s;
}
.survey-float-close:hover { color: var(--text); }
.survey-float-inner {
  display: flex;
  align-items: center;
  gap: 14px;
}
.survey-float-badge {
  font-size: 11px;
  font-weight: 800;
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}
.survey-float-text {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.survey-float-text strong {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
}
.survey-float-text span {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap; /* FIX: chống wrap dọc */
}
.survey-float-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  background: var(--gradient-gold);
  color: white;
  font-size: 13px;
  font-weight: 700;
  padding: 10px 16px;
  border-radius: 100px;
  white-space: nowrap;
  box-shadow: 0 4px 16px rgba(245,158,11,0.35);
  transition: all 0.2s;
  text-decoration: none;
}
.survey-float-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(245,158,11,0.5);
}
@media (max-width: 768px) {
  #survey-float {
    left: 8px; right: 8px; bottom: 14px;
    max-width: none;
    border-radius: 14px;
    padding: 12px 14px;
  }
  /* Thu gọn badge trên mobile — chỉ hiện icon */
  .survey-float-badge {
    font-size: 18px;           /* Chỉ hiện emoji 🔥 */
    letter-spacing: 0;
    margin-bottom: 0;
  }
  /* Thu nhỏ text và đảm bảo không wrap */
  .survey-float-text strong { font-size: 13px; }
  .survey-float-text span   { font-size: 11px; }
  /* Button nhỏ hơn trên mobile */
  .survey-float-btn { font-size: 12px; padding: 9px 14px; }
  .survey-float-inner { gap: 10px; }
}

/* ===== AI CHATBOT ===== */
#ai-chatbot { position: fixed; bottom: 140px; right: 24px; z-index: 1001; display: flex; flex-direction: column; align-items: flex-end; }
#chatbot-toggle { background: var(--gradient); border: none; width: 56px; height: 56px; border-radius: 50%; box-shadow: var(--shadow-cyan); cursor: pointer; display: flex; align-items: center; justify-content: center; transition: all 0.3s ease; }
#chatbot-toggle:hover { transform: scale(1.05); box-shadow: 0 8px 32px rgba(6,182,212,0.6); }
.chatbot-toggle-icon { font-size: 24px; color: white; }
#chatbot-window { position: absolute; bottom: 72px; right: 0; width: 340px; height: 480px; background: var(--dark-2); border: 1px solid var(--border-cyan); border-radius: var(--radius); box-shadow: 0 10px 40px rgba(0,0,0,0.5); display: flex; flex-direction: column; overflow: hidden; transition: opacity 0.3s, transform 0.3s; transform-origin: bottom right; opacity: 1; pointer-events: auto; transform: scale(1) translateY(0); }
#chatbot-window.hidden { opacity: 0; pointer-events: none; transform: scale(0.9) translateY(10px); }
@media (max-width: 480px) { #ai-chatbot { bottom: 90px; right: 16px; } #chatbot-window { position: fixed; bottom: 0; right: 0; top: 0; left: 0; width: 100%; height: 100%; border-radius: 0; z-index: 1002; } }
.chatbot-header { background: var(--gradient-dark); padding: 16px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.chatbot-header-info { display: flex; align-items: center; gap: 12px; }
.chatbot-avatar { background: var(--cyan); color: #fff; width: 36px; height: 36px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; }
.chatbot-name { font-weight: 600; font-size: 15px; }
.chatbot-status { font-size: 12px; color: var(--cyan); }
#chatbot-close { background: none; border: none; color: var(--text-muted); font-size: 24px; cursor: pointer; }
.chatbot-messages { flex: 1; padding: 16px; overflow-y: auto; display: flex; flex-direction: column; gap: 12px; }
.chat-msg { max-width: 85%; padding: 12px 16px; border-radius: 16px; font-size: 14px; line-height: 1.5; }
.chat-msg.bot { background: var(--dark-4); color: var(--text); align-self: flex-start; border-bottom-left-radius: 4px; }
.chat-msg.user { background: var(--cyan); color: #fff; align-self: flex-end; border-bottom-right-radius: 4px; }
.chatbot-suggestions { padding: 12px; background: var(--dark-3); border-top: 1px solid var(--border); display: flex; flex-wrap: wrap; gap: 8px; }
.chat-btn { background: var(--dark-4); border: 1px solid var(--border-cyan); color: var(--text); padding: 8px 12px; border-radius: 20px; font-size: 13px; cursor: pointer; transition: all 0.2s; text-align: left; }
.chat-btn:hover { background: rgba(6,182,212,0.1); border-color: var(--cyan); }
.chat-btn.primary { background: var(--gold); border-color: var(--gold); color: #000; font-weight: 600; }
.chat-btn.primary:hover { background: var(--gold-light); }

/* Chatbot input bar */
.chatbot-input-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: var(--dark-4);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.chatbot-input-bar input {
  flex: 1;
  background: var(--dark-3);
  border: 1px solid var(--border-cyan);
  border-radius: 20px;
  padding: 9px 14px;
  color: var(--text);
  font-size: 13px;
  font-family: 'Inter', sans-serif;
  outline: none;
  transition: border-color 0.2s;
}
.chatbot-input-bar input:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 2px rgba(6,182,212,0.15);
}
.chatbot-input-bar input::placeholder { color: var(--text-dim); }
#chatbot-send {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--gradient);
  color: white;
  font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s;
}
#chatbot-send:hover { transform: scale(1.1); box-shadow: 0 4px 16px rgba(6,182,212,0.4); }