/* ==========================================================================
   STRATEGIC GIFTING OS - LANDING PAGE STYLESHEET
   Design Theme: Modern Dark Executive Luxury & High-Converting Direct Response
   Palette: Deep Navy Slate (#0b132a), Obsidian (#050914), Rich Gold (#d4af37, #f59e0b), Emerald Accent (#10b981)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,600;0,700;0,800;1,600&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
  --bg-dark: #070d19;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --border-glass: rgba(212, 175, 55, 0.2);
  --border-light: rgba(255, 255, 255, 0.08);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-gold: #fbbf24;

  --accent-gold-start: #d4af37;
  --accent-gold-end: #f59e0b;
  --accent-gold-gradient: linear-gradient(135deg, #f59e0b 0%, #d4af37 50%, #b48811 100%);
  --accent-emerald: #10b981;
  --accent-emerald-gradient: linear-gradient(135deg, #10b981 0%, #059669 100%);
  
  --shadow-gold: 0 10px 30px -10px rgba(245, 158, 11, 0.3);
  --shadow-card: 0 20px 40px -15px rgba(0, 0, 0, 0.5);

  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

/* Typography & Utilities */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

.text-gold {
  background: var(--accent-gold-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  color: var(--text-gold);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 20px;
}

.section-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto 48px auto;
}

.text-center {
  text-align: center;
}

/* Buttons & CTAs */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 32px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  border: none;
  outline: none;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--accent-gold-gradient);
  color: #0b132a;
  box-shadow: var(--shadow-gold);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 35px -5px rgba(245, 158, 11, 0.45);
}

.btn-zalo {
  background: #0068ff;
  color: #ffffff;
  box-shadow: 0 10px 25px -5px rgba(0, 104, 255, 0.4);
}

.btn-zalo:hover {
  background: #0056d6;
  transform: translateY(-2px);
  box-shadow: 0 15px 30px -5px rgba(0, 104, 255, 0.5);
}

.btn-outline {
  background: transparent;
  color: var(--text-main);
  border: 1px solid var(--border-glass);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--text-gold);
  color: var(--text-gold);
}

.btn-block {
  width: 100%;
}

.pulse-glow::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.2) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.3s;
}

.pulse-glow:hover::after {
  opacity: 1;
}

/* Header Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 18px 0;
  background: rgba(7, 13, 25, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 40px;
  height: 40px;
  background: var(--accent-gold-gradient);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0b132a;
  font-weight: 900;
  font-size: 1.2rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--text-gold);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* 5-SECOND HERO SECTION */
.hero {
  position: relative;
  padding: 160px 0 100px 0;
  background: radial-gradient(circle at 50% 20%, rgba(212, 175, 55, 0.12) 0%, transparent 60%),
              radial-gradient(circle at 80% 60%, rgba(16, 185, 129, 0.08) 0%, transparent 50%),
              var(--bg-dark);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: center;
}

.hero-badge-5s {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-full);
  color: var(--accent-emerald);
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.hero-badge-5s i {
  animation: blink 1.5s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 4.5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 36px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}

.hero-guarantee-strip {
  display: flex;
  align-items: center;
  gap: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
}

.guarantee-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.guarantee-item i {
  color: var(--text-gold);
}

.hero-image-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-card);
}

.hero-image-wrapper img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.hero-image-wrapper:hover img {
  transform: scale(1.03);
}

.hero-floating-card {
  position: absolute;
  bottom: 24px;
  left: 24px;
  right: 24px;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.floating-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--accent-gold-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0b132a;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.floating-text h4 {
  font-size: 0.95rem;
  color: var(--text-main);
  margin-bottom: 2px;
}

.floating-text p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* PAIN POINTS SECTION */
.section-pains {
  padding: 100px 0;
  background: #050914;
}

.pain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 24px;
}

.pain-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: var(--transition);
  position: relative;
}

.pain-card:hover {
  transform: translateY(-5deg);
  border-color: rgba(239, 68, 68, 0.4);
  background: rgba(239, 68, 68, 0.03);
}

.pain-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.pain-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
  color: var(--text-main);
}

.pain-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* DIAGNOSIS & SOLUTION SHOWCASE */
.section-solution {
  padding: 100px 0;
  position: relative;
}

.solution-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.solution-image-container {
  position: relative;
}

.solution-image {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.solution-image img {
  width: 100%;
  height: 440px;
  object-fit: cover;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 32px;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.feature-item:hover {
  border-color: var(--border-glass);
  background: var(--bg-card-hover);
}

.feature-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.feature-content h4 {
  font-size: 1.05rem;
  color: var(--text-main);
  margin-bottom: 4px;
}

.feature-content p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* INTERACTIVE SCAN QUIZ SECTION */
.section-quiz {
  padding: 90px 0;
  background: linear-gradient(180deg, #050914 0%, #0b132a 100%);
}

.quiz-container {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 48px;
  max-width: 860px;
  margin: 0 auto;
  box-shadow: var(--shadow-card);
}

.quiz-step {
  display: none;
}

.quiz-step.active {
  display: block;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 28px 0;
}

.quiz-option {
  padding: 18px 24px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition);
  font-weight: 600;
  font-size: 1rem;
}

.quiz-option:hover, .quiz-option.selected {
  background: rgba(245, 158, 11, 0.1);
  border-color: var(--text-gold);
  color: var(--text-gold);
}

.quiz-progress {
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  margin-bottom: 36px;
  overflow: hidden;
}

.quiz-progress-bar {
  height: 100%;
  background: var(--accent-gold-gradient);
  width: 33%;
  transition: width 0.3s ease;
}

/* PRICING SECTION - REAL SPECIFIC PRICES */
.section-pricing {
  padding: 110px 0;
  position: relative;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-glass);
}

.pricing-card.featured {
  border: 2px solid var(--text-gold);
  background: linear-gradient(180deg, rgba(245, 158, 11, 0.08) 0%, rgba(15, 23, 42, 0.9) 100%);
  box-shadow: var(--shadow-gold);
}

.popular-badge {
  position: absolute;
  top: -16px;
  right: 28px;
  background: var(--accent-gold-gradient);
  color: #0b132a;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pricing-header h3 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--text-main);
  margin-bottom: 8px;
}

.pricing-header p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  min-height: 42px;
}

.price-box {
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
}

.price-amount {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-gold);
  line-height: 1;
}

.price-usd {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.pricing-body {
  flex-grow: 1;
  margin-bottom: 32px;
}

.pricing-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.pricing-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--text-main);
}

.pricing-list li i {
  color: var(--accent-emerald);
  margin-top: 3px;
  flex-shrink: 0;
}

/* ABOUT EXPERT SECTION */
.section-expert {
  padding: 100px 0;
  background: #050914;
}

.expert-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 60px;
  align-items: center;
}

.expert-image {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-glass);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.expert-image img {
  width: 100%;
  height: 480px;
  object-fit: cover;
}

.expert-bio h2 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.expert-title {
  color: var(--text-gold);
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 24px;
}

.expert-desc p {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: 1rem;
  line-height: 1.7;
}

.expert-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
}

.stat-item h4 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-gold);
}

.stat-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* LEAD INTAKE FORM SECTION & MODAL */
.section-lead-form {
  padding: 110px 0;
  background: radial-gradient(circle at 50% 50%, rgba(212, 175, 55, 0.08) 0%, transparent 70%), var(--bg-dark);
}

.lead-form-box {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 48px;
  max-width: 720px;
  margin: 0 auto;
  box-shadow: var(--shadow-card);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--text-gold);
  background: rgba(245, 158, 11, 0.05);
  box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.1);
}

textarea.form-control {
  resize: vertical;
  min-height: 100px;
}

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

/* MODAL STYLES */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: #0f172a;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 100%;
  max-width: 560px;
  position: relative;
  box-shadow: var(--shadow-card);
  transform: scale(0.9);
  transition: var(--transition);
}

.modal-overlay.active .modal-content {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  transition: var(--transition);
}

.modal-close:hover {
  color: var(--text-main);
}

/* FLOATING BAR FOR MOBILE/QUICK ACTION */
.floating-action-bar {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.float-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.5rem;
  box-shadow: 0 10px 25px rgba(0,0,0,0.4);
  transition: var(--transition);
  position: relative;
}

.float-btn:hover {
  transform: scale(1.1);
}

.float-zalo {
  background: #0068ff;
}

.float-phone {
  background: var(--accent-emerald);
}

.float-tooltip {
  position: absolute;
  right: 68px;
  background: #0f172a;
  color: var(--text-main);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
  border: 1px solid var(--border-glass);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.float-btn:hover .float-tooltip {
  opacity: 1;
}

/* TOAST NOTIFICATION */
.toast-notification {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 3000;
  background: #0f172a;
  border: 1px solid var(--accent-emerald);
  border-radius: var(--radius-md);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  transform: translateX(120%);
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.toast-notification.show {
  transform: translateX(0);
}

.toast-icon {
  color: var(--accent-emerald);
  font-size: 1.4rem;
}

/* FOOTER */
.footer {
  padding: 60px 0 30px 0;
  background: #030712;
  border-top: 1px solid var(--border-light);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h4 {
  font-size: 1.1rem;
  color: var(--text-main);
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--text-gold);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* RESPONSIVE DESIGN */
@media (max-width: 992px) {
  .hero-grid, .solution-grid, .expert-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .nav-menu {
    display: none;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .hero {
    padding: 120px 0 60px 0;
  }
  .hero-cta-group {
    flex-direction: column;
  }
  .btn {
    width: 100%;
  }
  .quiz-container, .lead-form-box, .modal-content {
    padding: 24px;
  }
}