@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&family=Inter:wght@300;400;500;600&display=swap');

:root {
   --color-primary: #023D45; /* Dark Teal - Xanh Cổ Vịt */
  --color-primary-light: #0d5f6b;
  --color-accent: #C9A763; /* Muted Gold */
  --color-accent-hover: #b4914c;
  --color-bg-main: #FDFBF7; /* Soft Cream */
  --color-bg-secondary: #F3EFE6;
  --color-text-dark: #023D45; /* Dark Teal for captions */
  --color-text-light: #FDFBF7;
  --color-text-muted: #556265;
  --color-border: #E8E2D2;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  color: var(--color-text-dark);
  background-color: var(--color-bg-main);
  line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Playfair Display', serif;
  font-weight: 600;
  line-height: 1.2;
}

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

/* Utilities */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 80px 0;
}

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

/* Animations */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-up {
  opacity: 0;
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 32px;
  border-radius: 4px;
  font-weight: 500;
  font-size: 16px;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-light);
  box-shadow: 0 10px 20px rgba(2, 61, 69, 0.15);
}

.btn-primary:hover {
  background-color: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: 0 15px 25px rgba(2, 61, 69, 0.25);
}

.btn-accent {
  background-color: var(--color-accent);
  color: #fff;
  box-shadow: 0 10px 20px rgba(201, 167, 99, 0.2);
}

.btn-accent:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 15px 25px rgba(201, 167, 99, 0.3);
}

/* Navigation */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border);
}

.navbar .logo {
  font-family: 'Playfair Display', serif;
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.5px;
}

.navbar .nav-cta {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-primary);
  padding-bottom: 2px;
  transition: opacity 0.3s ease;
}

.navbar .nav-cta:hover {
  opacity: 0.7;
}

/* Hero Section */
.hero {
  position: relative;
  overflow: hidden;
  padding: 80px 0 100px;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('assets/hero_bg.png');
  background-size: cover;
  background-position: center;
  opacity: 0.08; /* Extremely subtle */
  z-index: -1;
  pointer-events: none;
}

/* Bubbles Effect */
.bubbles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 0;
}

.bubbles span {
  position: absolute;
  bottom: -180px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 50%;
  pointer-events: none;
  box-shadow: 0 0 50px rgba(255, 255, 255, 0.9), inset 0 0 20px rgba(255, 255, 255, 0.5);
  animation: animateBubble 12s linear infinite;
  z-index: 1;
}

.bubbles span:nth-child(even) {
  background: rgba(255, 255, 255, 0.4);
  box-shadow: 0 0 40px rgba(255, 255, 255, 0.7), inset 0 0 15px rgba(255, 255, 255, 0.3);
}

.bubbles span:nth-child(1) { left: 10%; width: 150px; height: 150px; animation-duration: 8s;}
.bubbles span:nth-child(2) { left: 20%; width: 80px; height: 80px; animation-duration: 5s; animation-delay: 1s;}
.bubbles span:nth-child(3) { left: 35%; width: 180px; height: 180px; animation-duration: 10s; animation-delay: 2s;}
.bubbles span:nth-child(4) { left: 50%; width: 120px; height: 120px; animation-duration: 7s; animation-delay: 0s;}
.bubbles span:nth-child(5) { left: 65%; width: 140px; height: 140px; animation-duration: 9s; animation-delay: 3s;}
.bubbles span:nth-child(6) { left: 80%; width: 100px; height: 100px; animation-duration: 6s; animation-delay: 1.5s;}
.bubbles span:nth-child(7) { left: 90%; width: 120px; height: 120px; animation-duration: 11s; animation-delay: 0.5s;}
.bubbles span:nth-child(8) { left: 5%;  width: 90px; height: 90px; animation-duration: 6s; animation-delay: 4s;}
.bubbles span:nth-child(9) { left: 25%; width: 200px; height: 200px; animation-duration: 12s; animation-delay: 2s;}
.bubbles span:nth-child(10){ left: 45%; width: 100px; height: 100px; animation-duration: 8s; animation-delay: 3s;}
.bubbles span:nth-child(11){ left: 75%; width: 130px; height: 130px; animation-duration: 10s; animation-delay: 1s;}
.bubbles span:nth-child(12){ left: 85%; width: 80px; height: 80px; animation-duration: 5s; animation-delay: 2.5s;}
.bubbles span:nth-child(13){ left: 15%; width: 110px; height: 110px; animation-duration: 9s; animation-delay: 1s;}
.bubbles span:nth-child(14){ left: 55%; width: 90px; height: 90px; animation-duration: 7s; animation-delay: 2s;}
.bubbles span:nth-child(15){ left: 95%; width: 120px; height: 120px; animation-duration: 11s; animation-delay: 0s;}

@keyframes animateBubble {
  0% { transform: translateY(0) scale(0); opacity: 0; }
  20% { opacity: 0.8; }
  80% { opacity: 0.8; }
  100% { transform: translateY(-130vh) scale(1.5); opacity: 0; }
}

.hero .container {
  position: relative;
  z-index: 5;
}

.eyebrow {
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 16px;
  display: block;
}

.hero-title {
  font-size: 48px;
  color: var(--color-primary);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero-title i {
  font-style: italic;
  font-weight: 400;
  color: var(--color-accent);
}

.hero-desc {
  font-size: 19px;
  color: var(--color-text-muted);
  max-width: 900px;
  margin: 0 auto 40px;
  line-height: 1.8;
}

.no-break {
  white-space: nowrap;
}

@media (max-width: 1040px) {
  .hero-desc {
    font-size: 17px;
    max-width: 600px;
  }
}

.hero-promises {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 500px;
  margin: 0 auto 48px;
  text-align: left;
}

.promise-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
}

.promise-icon {
  color: var(--color-accent);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(201, 167, 99, 0.1);
  border-radius: 50%;
  flex-shrink: 0;
}

.price-tag {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-top: 16px;
  display: block;
}

.price-strike {
  text-decoration: line-through;
  opacity: 0.5;
  margin-right: 8px;
}

.price-main {
  font-weight: 600;
  color: var(--color-primary);
  font-size: 18px;
}

/* For Who Section */
.for-who {
  background-color: var(--color-bg-secondary);
  border-radius: 24px;
  padding: 60px;
  margin-bottom: 80px;
}

.section-title {
  font-size: 36px;
  color: var(--color-primary);
  margin-bottom: 40px;
  text-align: center;
}

.pain-points {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.pain-card {
  background: #fff;
  padding: 32px;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.03);
  transition: transform 0.3s ease;
}

.pain-card:hover {
  transform: translateY(-5px);
}

.pain-card i {
  color: var(--color-accent);
  font-size: 24px;
  opacity: 0.5;
  margin-bottom: 16px;
  display: block;
}

.pain-card p {
  color: var(--color-text-dark);
  font-size: 15px;
  line-height: 1.6;
}

/* Product Section */
.product {
  padding-bottom: 80px;
}

.product-wrapper {
  border: 1px solid var(--color-border);
  border-radius: 24px;
  padding: 60px;
  background: #fff;
  position: relative;
  overflow: hidden;
}

.product-wrapper::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(2,61,69,0.05) 0%, rgba(255,255,255,0) 70%);
  border-radius: 50%;
  transform: translate(30%, -30%);
}

.product-title {
  font-size: 32px;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.product-subtitle {
  font-size: 16px;
  color: var(--color-text-muted);
  margin-bottom: 40px;
  max-width: 650px;
}

.deliverables-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 48px;
}

.deliverables-list li {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 16px;
  color: var(--color-text-dark);
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--color-border);
}

.deliverables-list li:last-child {
  border-bottom: none;
}

.deliverables-list li span {
  width: 32px;
  height: 32px;
  background-color: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
}

/* Mentor Section */
.mentor {
  display: flex;
  align-items: center;
  gap: 48px;
  padding-bottom: 80px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 80px;
}

.mentor-image {
  flex: 0 0 250px;
  height: 250px;
  border-radius: 50%;
  overflow: hidden;
  border: 8px solid var(--color-bg-secondary);
}

.mentor-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.mentor-image a:hover img {
  transform: scale(1.05);
  box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.mentor-info h3 {
  font-size: 28px;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.mentor-info h4 {
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 24px;
}

.mentor-info p {
  color: var(--color-text-muted);
  font-size: 15px;
  line-height: 1.8;
}

/* FAQ */
.faq {
  padding-bottom: 80px;
}

.faq-item {
  margin-bottom: 24px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 24px;
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: var(--color-accent);
  box-shadow: 0 10px 20px rgba(0,0,0,0.02);
}

.faq-q {
  font-family: 'Playfair Display', serif;
  font-size: 20px;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.faq-a {
  color: var(--color-text-muted);
  font-size: 15px;
}

/* Domain Section */
.domain-section {
  text-align: center;
  background-color: var(--color-primary);
  border-radius: 24px;
  padding: 60px;
  margin-bottom: 80px;
  color: #fff;
}

.domain-section .section-title {
  color: #fff;
  margin-bottom: 16px;
}

.domain-desc {
  color: rgba(255,255,255,0.8);
  margin-bottom: 40px;
}

.domain-chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

.domain-chip {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 12px 24px;
  border-radius: 30px;
  font-family: 'Inter', monospace;
  font-size: 15px;
  color: rgba(255,255,255,0.7);
  transition: all 0.3s;
}

.domain-chip.highlight {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
  font-weight: 600;
  transform: scale(1.05);
  box-shadow: 0 10px 20px rgba(201, 167, 99, 0.3);
}

/* Final CTA */
.final-cta {
  text-align: center;
  padding-bottom: 100px;
}

.final-cta h2 {
  font-size: 40px;
  color: var(--color-primary);
  margin-bottom: 24px;
}

.final-cta p {
  font-size: 16px;
  color: var(--color-text-muted);
  margin-bottom: 40px;
}

.scarcity {
  display: inline-block;
  background: #FEF3F2;
  color: #B42318;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  margin-top: 24px;
}

/* Footer */
.footer {
  text-align: center;
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 13px;
}

/* Feedback Section */
.proof-section {
  padding-bottom: 80px;
}

.feedback-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 25px;
  margin-top: 50px;
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

.feedback-item {
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0,0,0,0.02);
  display: flex;
  flex-direction: column;
}

.feedback-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 30px rgba(0,0,0,0.08);
}

.feedback-item img {
  width: 100%;
  height: auto;
  display: block;
}

.feedback-caption {
  padding: 18px;
  font-size: 16px;
  color: #023D45;
  line-height: 1.4;
  font-weight: 700;
  text-align: center;
  border-top: 1px solid var(--color-border);
  flex-grow: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(2, 61, 69, 0.8);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
}

.modal-content {
  background: #fff;
  padding: 40px;
  border-radius: 24px;
  max-width: 700px;
  width: 95%;
  position: relative;
  box-shadow: 0 25px 50px rgba(0,0,0,0.2);
  text-align: center;
  max-height: 95vh;
  overflow-y: auto;
}

.close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 28px;
  cursor: pointer;
  color: var(--color-text-muted);
  line-height: 1;
}

.close-btn:hover {
  color: var(--color-primary);
}

/* Responsive Styles Update */
@media (max-width: 768px) {
  .hero-title { font-size: 36px; }
  .pain-points { grid-template-columns: 1fr; }
  .product-wrapper { padding: 40px 24px; }
  .mentor { flex-direction: column; text-align: center; gap: 32px; }
  .for-who { padding: 40px 24px; }
  .domain-section { padding: 40px 24px; }
  .modal-content { padding: 30px 20px; }
}