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

:root {
  --white: #ffffff;
  --bg: #f8fafc;
  --bg-alt: #f1f5f9;
  --surface: #ffffff;
  --border: #e2e8f0;
  --border-light: #f1f5f9;

  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --primary: #f59e0b;
  --primary-dark: #d97706;
  --primary-light: #fef3c7;
  --primary-glow: rgba(245, 158, 11, 0.15);

  --accent: #2563eb;
  --accent-light: #eff6ff;

  --success: #10b981;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.1);
  --radius: 12px;
  --radius-lg: 20px;

  --font: 'Be Vietnam Pro', system-ui, sans-serif;
  --header-h: 72px;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

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

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

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

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 10px;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: var(--text);
  border-color: var(--primary);
}

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--primary-glow);
}

.btn-outline {
  background: var(--white);
  color: var(--text);
  border-color: var(--border);
}

.btn-outline:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.btn-white {
  background: var(--white);
  color: var(--text);
}

.btn-white:hover {
  background: var(--primary-light);
  transform: translateY(-1px);
}

.btn-outline-white {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--white);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

/* ===== Sticky Call Bar ===== */
.sticky-call {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: var(--primary);
  color: var(--text);
  padding: 14px;
  font-weight: 700;
  font-size: 1.05rem;
  text-align: center;
  gap: 8px;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
}

/* ===== Header ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  height: var(--header-h);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  font-size: 1.35rem;
}

.logo-icon {
  font-size: 1.5rem;
}

.logo-text .accent {
  color: var(--primary-dark);
}

.nav {
  display: flex;
  gap: 28px;
}

.nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s;
}

.nav a:hover {
  color: var(--primary-dark);
}

.header-cta {
  padding: 10px 20px;
  font-size: 0.9rem;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ===== Hero ===== */
.hero {
  padding: 48px 0 80px;
  background: linear-gradient(180deg, var(--white) 0%, var(--bg) 100%);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.badge {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero h1 .highlight {
  color: var(--primary-dark);
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 480px;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}

.hero-trust {
  display: flex;
  gap: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.trust-item strong {
  display: block;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text);
}

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

/* Hero visual */
.hero-visual {
  position: relative;
}

.hero-image-wrapper {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-light);
  background: var(--bg-alt);
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-banner-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

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

.hero-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-light);
  overflow: hidden;
}

.hero-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px 20px;
  background: var(--bg-alt);
  font-weight: 600;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border-light);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.dot.green {
  background: var(--success);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.booking-form {
  padding: 24px;
}

.form-field {
  margin-bottom: 16px;
}

.form-field label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.input-mock {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.95rem;
  color: var(--text);
}

.input-mock svg {
  color: var(--primary-dark);
  flex-shrink: 0;
}

.price-estimate {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  background: var(--accent-light);
  border-radius: 10px;
  margin-bottom: 16px;
}

.price-estimate span {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.price-estimate strong {
  color: var(--accent);
  font-size: 1.05rem;
}

.floating-badge {
  position: absolute;
  background: var(--white);
  padding: 10px 16px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  white-space: nowrap;
}

.badge-1 {
  top: -12px;
  right: -10px;
  animation: float 3s ease-in-out infinite;
}

.badge-2 {
  bottom: 20px;
  left: -20px;
  animation: float 3s ease-in-out infinite 1.5s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

/* ===== Section common ===== */
.section-header {
  margin-bottom: 48px;
}

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

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary-dark);
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: clamp(1.75rem, 3vw, 2.4rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.section-sub {
  color: var(--text-secondary);
  margin-top: 12px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== Features ===== */
.features {
  padding: 80px 0;
  background: var(--white);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  padding: 28px;
  background: var(--bg);
  border-radius: var(--radius);
  border: 1px solid var(--border-light);
  transition: all 0.25s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
  background: var(--white);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ===== Areas ===== */
.areas {
  padding: 80px 0;
  background: var(--bg);
}

.areas-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.areas-content h2 {
  font-size: clamp(1.75rem, 3vw, 2.4rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
}

.areas-content > p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.area-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.area-tags li {
  padding: 8px 16px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.area-tags li:last-child {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary-dark);
  font-weight: 600;
}

.map-placeholder {
  position: relative;
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--accent-light) 0%, var(--primary-light) 100%);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
}

.map-center {
  text-align: center;
  background: var(--white);
  padding: 24px 32px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.map-center span {
  font-size: 2.5rem;
  display: block;
}

.map-center small {
  color: var(--text-secondary);
  font-weight: 600;
}

.map-pin {
  position: absolute;
  background: var(--white);
  padding: 6px 12px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
}

.pin-1 { top: 20%; left: 15%; }
.pin-2 { top: 60%; right: 10%; }
.pin-3 { bottom: 25%; left: 20%; }
.pin-4 { top: 30%; right: 25%; }

/* ===== Steps ===== */
.steps {
  padding: 80px 0;
  background: var(--white);
}

.steps-grid {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
}

.step {
  flex: 1;
  max-width: 280px;
  text-align: center;
  padding: 24px;
}

.step-num {
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: var(--text);
  font-weight: 800;
  font-size: 1.2rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.step h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.step p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.step-arrow {
  font-size: 1.5rem;
  color: var(--text-muted);
  padding-top: 36px;
  flex-shrink: 0;
}

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

/* ===== Pricing ===== */
.pricing {
  padding: 80px 0;
  background: var(--bg);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.price-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  position: relative;
  transition: all 0.25s;
}

.price-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.price-card.featured {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.popular-tag {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: var(--text);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.price-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.price {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 20px;
}

.price span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-muted);
}

.price-card ul {
  list-style: none;
}

.price-card li {
  padding: 8px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-light);
}

.price-card li::before {
  content: '✓ ';
  color: var(--success);
  font-weight: 700;
}

/* ===== Reviews ===== */
.reviews {
  padding: 80px 0;
  background: var(--white);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 28px;
}

.stars {
  color: var(--primary);
  font-size: 1.1rem;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.review-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
  font-style: italic;
}

.review-card footer strong {
  display: block;
  font-size: 0.9rem;
}

.review-card footer span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== FAQ ===== */
.faq {
  padding: 80px 0;
  background: var(--bg);
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 18px 24px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.2s;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 1.3rem;
  color: var(--primary-dark);
  font-weight: 400;
  transition: transform 0.2s;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item summary:hover {
  background: var(--bg);
}

.faq-item p {
  padding: 0 24px 18px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ===== Final CTA ===== */
.final-cta {
  padding: 80px 0;
  background: var(--white);
}

.cta-box {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: var(--radius-lg);
  padding: 56px 40px;
  text-align: center;
  color: var(--text);
}

.cta-box h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 12px;
}

.cta-box > p {
  opacity: 0.85;
  margin-bottom: 28px;
  font-size: 1rem;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

/* ===== Footer ===== */
.footer {
  padding: 48px 0 32px;
  background: var(--text);
  color: rgba(255, 255, 255, 0.7);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 32px;
}

.footer-brand .logo-text {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--white);
  display: block;
  margin-bottom: 8px;
}

.footer-brand .accent {
  color: var(--primary);
}

.footer-brand p {
  font-size: 0.9rem;
}

.footer-contact p,
.footer-legal p {
  font-size: 0.875rem;
  margin-bottom: 6px;
}

.footer-contact a {
  color: var(--primary);
}

.footer-contact a:hover {
  text-decoration: underline;
}

/* ===== Floating Contact ===== */
.floating-contact {
  position: fixed;
  bottom: 30px;
  right: 30px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  z-index: 999;
}

.floating-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  transition: all 0.3s ease;
  cursor: pointer;
  position: relative;
}

.floating-btn:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.floating-zalo {
  background: #0068FF;
}

.floating-btn::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  z-index: -1;
  animation: pulse-ring 1.8s infinite;
  box-sizing: border-box;
}

.floating-zalo::after {
  border: 2px solid #0068FF;
}

.floating-phone {
  background: #10b981;
  color: #fff;
}

.floating-phone::after {
  border: 2px solid #10b981;
}

.floating-btn svg {
  display: block;
}

.floating-zalo svg {
  width: 100%;
  height: 100%;
}

@keyframes pulse-ring {
  0% {
    transform: scale(1);
    opacity: 0.8;
  }
  100% {
    transform: scale(1.4);
    opacity: 0;
  }
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .features-grid,
  .pricing-grid,
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-grid {
    gap: 32px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-h: 64px;
  }

  .sticky-call {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  body {
    padding-bottom: 56px;
  }

  .nav {
    display: none;
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 20px;
    gap: 0;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: 14px 0;
    border-bottom: 1px solid var(--border-light);
    font-size: 1rem;
  }

  .header-cta {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero {
    padding: 32px 0 56px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: -1;
  }

  .hero-trust {
    gap: 20px;
  }

  .floating-badge {
    display: none;
  }

  .features-grid,
  .pricing-grid,
  .reviews-grid {
    grid-template-columns: 1fr;
  }

  .areas-inner {
    grid-template-columns: 1fr;
  }

  .areas-map {
    order: -1;
  }

  .map-placeholder {
    aspect-ratio: 16/10;
  }

  .steps-grid {
    flex-direction: column;
    align-items: center;
  }

  .step-arrow {
    transform: rotate(90deg);
    padding: 0;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .cta-box {
    padding: 40px 24px;
  }

  .cta-actions {
    flex-direction: column;
  }

  .cta-actions .btn {
    width: 100%;
  }

  .hero-image-wrapper {
    aspect-ratio: 16/10;
  }

  .floating-contact {
    bottom: 125px;
    right: 20px;
    gap: 12px;
  }

  .floating-btn {
    width: 48px;
    height: 48px;
  }

  .floating-phone svg {
    width: 20px;
    height: 20px;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-trust {
    flex-wrap: wrap;
    gap: 16px;
  }

  .trust-item {
    flex: 1;
    min-width: 80px;
  }
}