:root {
  /* Colors — Dark Theme (default) */
  --bg-color: #050b14;
  --surface-color: #0b1528;
  --surface-hover: #121f3a;
  --primary-color: #D4AF37;
  --primary-color-hover: #e5c158;
  --text-primary: #fdfdfd;
  --text-secondary: #a0aec0;
  --border-color: rgba(212, 175, 55, 0.2);
  --footer-bg: #03060c;
  --navbar-scrolled-bg: rgba(5, 11, 20, 0.85);
  --card-border: rgba(255, 255, 255, 0.05);
  --form-bg: rgba(255, 255, 255, 0.03);
  --form-border: rgba(255, 255, 255, 0.1);
  --form-focus-bg: rgba(255, 255, 255, 0.05);
  --page-intro-border: rgba(255, 255, 255, 0.05);
  --footer-border: rgba(255, 255, 255, 0.05);

  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Spacing */
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 4rem;
  --spacing-xxl: 8rem;

  /* Other */
  --border-radius: 8px;
  --transition-speed: 0.3s;
}

/* ── Light Theme ── */
[data-theme="light"] {
  --bg-color: #f5f0e8;
  --surface-color: #fffdf5;
  --surface-hover: #fdf6e0;
  --primary-color: #b8860b;
  --primary-color-hover: #d4a017;
  --text-primary: #1a1a2e;
  --text-secondary: #4a5568;
  --border-color: rgba(184, 134, 11, 0.3);
  --footer-bg: #e8e0cc;
  --navbar-scrolled-bg: rgba(245, 240, 232, 0.92);
  --card-border: rgba(184, 134, 11, 0.12);
  --form-bg: rgba(0, 0, 0, 0.03);
  --form-border: rgba(0, 0, 0, 0.12);
  --form-focus-bg: rgba(0, 0, 0, 0.05);
  --page-intro-border: rgba(184, 134, 11, 0.15);
  --footer-border: rgba(184, 134, 11, 0.15);
}

[data-theme="light"] body {
  background-color: var(--bg-color);
  color: var(--text-primary);
}

[data-theme="light"] .cta-section {
  background: linear-gradient(135deg, #ede8d8 0%, #f5f0e8 100%);
}

[data-theme="light"] .hero::before {
  background: radial-gradient(circle at 70% 30%, rgba(184, 134, 11, 0.12) 0%, rgba(245, 240, 232, 0) 50%);
}

/* Light theme — navbar is always visible (no transparent floating) */
[data-theme="light"] .navbar {
  background: rgba(245, 240, 232, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(184, 134, 11, 0.15);
}

[data-theme="light"] .navbar.scrolled {
  background: rgba(245, 240, 232, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  border-bottom: 1px solid rgba(184, 134, 11, 0.2);
}

/* Nav link text colour in light mode */
[data-theme="light"] .nav-links a {
  color: #1a1a2e;
}

[data-theme="light"] .nav-links a:hover {
  color: var(--primary-color);
}

[data-theme="light"] footer {
  background-color: var(--footer-bg);
  border-top: 1px solid var(--footer-border);
}

[data-theme="light"] .footer-bottom {
  border-top: 1px solid var(--footer-border);
}

[data-theme="light"] .card {
  border: 1px solid var(--card-border);
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

[data-theme="light"] .card:hover {
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}

[data-theme="light"] .form-control {
  background-color: var(--form-bg);
  border-color: var(--form-border);
  color: var(--text-primary);
}

[data-theme="light"] .form-control:focus {
  background-color: var(--form-focus-bg);
}

[data-theme="light"] .page-intro {
  background: linear-gradient(180deg, rgba(232, 224, 204, 0.6) 0%, var(--bg-color) 100%);
  border-bottom: 1px solid var(--page-intro-border);
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
}

a {
  text-decoration: none;
  color: var(--text-primary);
  transition: color var(--transition-speed);
}

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

ul {
  list-style-type: none;
}

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

/* Layout Utilities */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-xl) 0;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  font-family: var(--font-heading);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-radius: var(--border-radius);
  transition: all var(--transition-speed);
  cursor: pointer;
  text-align: center;
  font-size: 0.9rem;
}

.btn-primary {
  background-color: var(--primary-color);
  color: var(--bg-color);
  border: 2px solid var(--primary-color);
}

.btn-primary:hover {
  background-color: var(--primary-color-hover);
  border-color: var(--primary-color-hover);
  box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3);
  transform: translateY(-2px);
  color: var(--bg-color);
}

.btn-secondary {
  background-color: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
  background-color: rgba(212, 175, 55, 0.1);
  transform: translateY(-2px);
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  padding: 1.5rem 0;
  transition: all 0.4s ease;
}

.navbar.scrolled {
  background: var(--navbar-scrolled-bg);
  backdrop-filter: blur(10px);
  padding: 1rem 0;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
  border-bottom: 1px solid var(--footer-border);
}

/* Theme Toggle Button */
.theme-toggle {
  background: none;
  border: 1.5px solid var(--border-color);
  color: var(--primary-color);
  cursor: pointer;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  transition: all var(--transition-speed);
  flex-shrink: 0;
  margin-left: 1rem;
}

.theme-toggle:hover {
  background-color: var(--border-color);
  transform: rotate(20deg) scale(1.1);
}

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

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.logo span {
  color: var(--primary-color);
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -5px;
  left: 0;
  background-color: var(--primary-color);
  transition: width var(--transition-speed);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* Navbar Right Group */
.navbar-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.menu-toggle {
  display: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--primary-color);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--spacing-xxl);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(circle at 70% 30%, rgba(212, 175, 55, 0.08) 0%, rgba(5, 11, 20, 0) 50%);
  z-index: -1;
}

.hero-content {
  max-width: 800px;
}

.hero-title {
  font-size: clamp(3rem, 6vw, 5rem);
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.hero-title span {
  color: var(--primary-color);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  max-width: 600px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
}

/* Section Headings */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section-header h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--primary-color);
}

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

/* Cards / Tiles */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.card {
  background-color: var(--surface-color);
  padding: 2.5rem;
  border-radius: var(--border-radius);
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: all var(--transition-speed);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 0;
  background-color: var(--primary-color);
  transition: height var(--transition-speed);
}

.card:hover {
  transform: translateY(-5px);
  background-color: var(--surface-hover);
  border-color: var(--border-color);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.card:hover::before {
  height: 100%;
}

.card h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

/* CTA Section */
.cta-section {
  background: linear-gradient(135deg, #0b1528 0%, #050b14 100%);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  text-align: center;
  padding: 5rem 0;
}

.cta-section h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.cta-section p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-size: 1.1rem;
}

/* Footer */
footer {
  background-color: #03060c;
  padding: 4rem 0 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-col h4 {
  font-size: 1.2rem;
  color: var(--primary-color);
  margin-bottom: 1.5rem;
}

.footer-col p, .footer-col a {
  color: var(--text-secondary);
  margin-bottom: 0.8rem;
  display: block;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-control {
  width: 100%;
  padding: 1rem;
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  font-family: var(--font-body);
  transition: all var(--transition-speed);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  background-color: rgba(255, 255, 255, 0.05);
}

/* Page Intro Block */
.page-intro {
  padding: 12rem 0 5rem;
  text-align: center;
  background: linear-gradient(180deg, rgba(11, 21, 40, 0.5) 0%, var(--bg-color) 100%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.page-intro h1 {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.page-intro p {
  color: var(--text-secondary);
  font-size: 1.2rem;
  max-width: 800px;
  margin: 0 auto;
}

/* Animations */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Delay modifiers for sequential animations */
.delay-100 { transition-delay: 100ms; }
.delay-200 { transition-delay: 200ms; }
.delay-300 { transition-delay: 300ms; }

/* Responsive adjustments */
@media (max-width: 768px) {
  .hero-actions {
    flex-direction: column;
  }
  
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 250px;
    height: 100vh;
    background-color: var(--surface-color);
    flex-direction: column;
    padding-top: 80px;
    transition: right 0.3s ease;
    box-shadow: -5px 0 30px rgba(0,0,0,0.5);
  }

  .nav-links.nav-active {
    right: 0;
  }

  .menu-toggle {
    display: block;
    z-index: 1001;
  }
  
  .page-intro {
    padding: 10rem 0 4rem;
  }
  
  .page-intro h1 {
    font-size: 2.5rem;
  }
}

/* Light theme — mobile nav panel */
@media (max-width: 768px) {
  [data-theme="light"] .nav-links {
    background-color: #f0ead8;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
  }

  [data-theme="light"] .nav-links a {
    color: #1a1a2e;
  }
}