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

:root {
  --bg-primary: #f8f9fc;
  --bg-secondary: #ffffff;
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a6a;
  --brand-primary: #0b1a2e;
  --brand-secondary: #f0c040;
  --brand-accent: #d4a030;
  --gradient-bg: linear-gradient(135deg, #f8f9fc 0%, #e8ecf1 100%);
  --glass-bg: rgba(255,255,255,0.7);
  --glass-border: rgba(255,255,255,0.3);
  --shadow-sm: 0 4px 20px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 40px rgba(0,0,0,0.08);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.1);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --nav-height: 72px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.dark-mode {
  --bg-primary: #0b1a2e;
  --bg-secondary: #112240;
  --text-primary: #e6e6f0;
  --text-secondary: #a0a0c0;
  --gradient-bg: linear-gradient(135deg, #0b1a2e 0%, #112240 100%);
  --glass-bg: rgba(255,255,255,0.08);
  --glass-border: rgba(255,255,255,0.1);
  --shadow-sm: 0 4px 20px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 40px rgba(0,0,0,0.4);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.5);
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--gradient-bg);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background 0.4s, color 0.4s;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img, svg { display: block; max-width: 100%; height: auto; }

/* ===== Header & Nav ===== */
header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  height: var(--nav-height);
  transition: var(--transition);
}

nav {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--brand-secondary);
  letter-spacing: 1px;
}

.nav-logo svg { width: 40px; height: 40px; }

.nav-links {
  display: flex;
  gap: 8px;
  align-items: center;
}

.nav-links a {
  padding: 8px 16px;
  border-radius: 40px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
}

.nav-links a:hover, .nav-links a.active {
  background: var(--brand-secondary);
  color: var(--brand-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-actions button {
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  color: var(--text-primary);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
}

.nav-actions button:hover { background: var(--glass-border); }

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text-primary);
}

.mobile-menu-btn svg { width: 28px; height: 28px; }

/* Mobile nav */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0; right: 0;
  background: var(--bg-secondary);
  padding: 20px 24px;
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
  z-index: 999;
  flex-direction: column;
  gap: 8px;
}

.mobile-nav.open { display: flex; }

.mobile-nav a {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: var(--transition);
}

.mobile-nav a:hover { background: var(--brand-secondary); color: var(--brand-primary); }

/* ===== Main ===== */
main { padding-top: var(--nav-height); }

/* ===== Section base ===== */
section { padding: 80px 24px; position: relative; }

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
  color: var(--text-primary);
  text-align: center;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  text-align: center;
  max-width: 700px;
  margin: 0 auto 48px;
}

/* ===== Hero ===== */
.hero {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--gradient-bg);
  position: relative;
  overflow: hidden;
  padding: 100px 24px;
}

.hero::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(240,192,64,0.15) 0%, transparent 70%);
  top: -200px;
  right: -200px;
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(11,26,46,0.1) 0%, transparent 70%);
  bottom: -100px;
  left: -100px;
  border-radius: 50%;
  pointer-events: none;
}

.hero-content { position: relative; z-index: 1; max-width: 900px; }

.hero-badge {
  display: inline-block;
  padding: 8px 24px;
  background: var(--brand-secondary);
  color: var(--brand-primary);
  border-radius: 40px;
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 4rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  color: var(--text-primary);
  letter-spacing: -1px;
}

.hero h1 span { color: var(--brand-secondary); }

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 40px;
}

.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn-primary {
  padding: 16px 40px;
  background: var(--brand-secondary);
  color: var(--brand-primary);
  border: none;
  border-radius: 60px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 8px 30px rgba(240,192,64,0.3);
}

.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(240,192,64,0.4); }

.btn-outline {
  padding: 16px 40px;
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--text-secondary);
  border-radius: 60px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
}

.btn-outline:hover { border-color: var(--brand-secondary); color: var(--brand-secondary); }

/* ===== Banner carousel ===== */
.banner-carousel {
  position: relative;
  width: 100%;
  max-width: 1000px;
  margin: 60px auto 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.banner-slides {
  display: flex;
  transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.banner-slide {
  min-width: 100%;
  background: var(--bg-secondary);
  padding: 60px 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

.banner-slide svg { width: 120px; height: 120px; flex-shrink: 0; }

.banner-slide-text { max-width: 500px; text-align: left; }

.banner-slide-text h3 { font-size: 1.8rem; margin-bottom: 12px; }

.banner-slide-text p { color: var(--text-secondary); }

.banner-dots {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 24px;
}

.banner-dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--text-secondary);
  opacity: 0.3;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.banner-dot.active { opacity: 1; background: var(--brand-secondary); transform: scale(1.2); }

/* ===== Glass card ===== */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.glass-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }

/* ===== Grids ===== */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

/* ===== Stats ===== */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }

.stat-item { padding: 24px; }

.stat-number { font-size: 3rem; font-weight: 800; color: var(--brand-secondary); line-height: 1.2; }

.stat-label { color: var(--text-secondary); margin-top: 8px; font-size: 1rem; }

/* ===== FAQ ===== */
.faq-item {
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-question {
  padding: 20px 24px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  transition: transform 0.3s;
  color: var(--brand-secondary);
}

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

.faq-answer {
  max-height: 0;
  padding: 0 24px;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
  color: var(--text-secondary);
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}

/* ===== Testimonials ===== */
.testimonial-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.testimonial-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }

.testimonial-text { font-style: italic; margin-bottom: 16px; color: var(--text-secondary); }

.testimonial-author { font-weight: 600; color: var(--brand-secondary); }

/* ===== Contact ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }

.contact-info { display: flex; flex-direction: column; gap: 20px; }

.contact-info-item { display: flex; gap: 16px; align-items: flex-start; }

.contact-info-item svg { width: 28px; height: 28px; flex-shrink: 0; color: var(--brand-secondary); }

/* ===== Footer ===== */
footer {
  background: var(--brand-primary);
  color: #c0c0d0;
  padding: 60px 24px 24px;
}

.footer-inner { max-width: 1200px; margin: 0 auto; }

.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }

.footer-brand svg { width: 48px; height: 48px; margin-bottom: 16px; }

.footer-brand p { max-width: 300px; font-size: 0.9rem; line-height: 1.6; }

.footer-col h4 { color: #fff; margin-bottom: 16px; font-size: 1rem; }

.footer-col a { display: block; padding: 6px 0; font-size: 0.9rem; transition: var(--transition); }

.footer-col a:hover { color: var(--brand-secondary); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
}

.footer-bottom-links { display: flex; gap: 24px; flex-wrap: wrap; }

/* ===== Back to top ===== */
.back-to-top {
  position: fixed;
  bottom: 40px;
  right: 40px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--brand-secondary);
  color: var(--brand-primary);
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 999;
  transition: var(--transition);
}

.back-to-top.visible { display: flex; }

.back-to-top:hover { transform: scale(1.1); }

/* ===== Search overlay ===== */
.search-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
}

.search-overlay.open { display: flex; }

.search-box {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 32px;
  width: 90%;
  max-width: 600px;
  box-shadow: var(--shadow-lg);
}

.search-box input {
  width: 100%;
  padding: 16px 20px;
  border: 2px solid var(--glass-border);
  border-radius: 60px;
  font-size: 1.1rem;
  background: var(--bg-primary);
  color: var(--text-primary);
  outline: none;
  transition: var(--transition);
}

.search-box input:focus { border-color: var(--brand-secondary); }

.search-results { margin-top: 20px; max-height: 300px; overflow-y: auto; }

.search-results a { display: block; padding: 12px 16px; border-radius: var(--radius-sm); transition: var(--transition); }

.search-results a:hover { background: var(--glass-bg); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-menu-btn { display: flex; }
  .hero h1 { font-size: 2.5rem; }
  .grid-2, .grid-3, .grid-4, .contact-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .section-title { font-size: 1.8rem; }
  .banner-slide { flex-direction: column; text-align: center; }
  .banner-slide-text { text-align: center; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 2rem; }
  section { padding: 60px 16px; }
  .btn-primary, .btn-outline { padding: 14px 28px; font-size: 0.9rem; }
}

/* ===== Scroll animation ===== */
.fade-up { opacity: 0; transform: translateY(40px); transition: opacity 0.7s ease, transform 0.7s ease; }

.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ===== Breadcrumb ===== */
.breadcrumb {
  display: flex;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 16px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.breadcrumb a { color: var(--text-secondary); transition: var(--transition); }

.breadcrumb a:hover { color: var(--brand-secondary); }

.breadcrumb span { color: var(--brand-secondary); }

/* ===== Dark mode toggle icon ===== */
.dark-mode .sun-icon { display: none; }
.dark-mode .moon-icon { display: block; }
.sun-icon { display: block; }
.moon-icon { display: none; }

/* ===== Misc ===== */
.text-center { text-align: center; }
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }
.gap-16 { gap: 16px; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }