:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-secondary: #0f172a;
  --color-accent: #06b6d4;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-text: #334155;
  --color-text-light: #64748b;
  --color-border: #e2e8f0;
  --radius: 12px;
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --max-width: 1100px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

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

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

a:hover {
  text-decoration: underline;
}

.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-secondary);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: white;
  font-size: 1.1rem;
}

.main-nav ul {
  display: flex;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav a {
  font-weight: 500;
  color: var(--color-text);
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--color-primary);
}

/* Hero */
.hero {
  position: relative;
  padding: 6rem 0 5rem;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: white;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(37, 99, 235, 0.25), transparent 40%),
              radial-gradient(circle at 20% 80%, rgba(6, 182, 212, 0.2), transparent 40%);
  pointer-events: none;
}

.hero .container {
  position: relative;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  line-height: 1.1;
  margin: 0 0 1.25rem;
  max-width: 800px;
}

.hero p.lead {
  font-size: 1.25rem;
  color: #cbd5e1;
  max-width: 650px;
  margin: 0 0 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 0.15s, box-shadow 0.15s;
}

.btn:hover {
  transform: translateY(-2px);
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 0 20px rgba(37, 99, 235, 0.35);
}

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

.btn-outline {
  background: transparent;
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.3);
  margin-left: 0.75rem;
}

.btn-outline:hover {
  border-color: white;
}

/* Sections */
.section {
  padding: 5rem 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-title {
  font-size: 2rem;
  color: var(--color-secondary);
  margin: 0 0 1rem;
  text-align: center;
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-light);
  max-width: 650px;
  margin: 0 auto 3rem;
}

/* Cards */
.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}

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

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  background: linear-gradient(135deg, #dbeafe, #cffafe);
  margin-bottom: 1rem;
}

.card h3 {
  margin: 0 0 0.75rem;
  color: var(--color-secondary);
}

.card p {
  margin: 0;
  color: var(--color-text-light);
}

.card ul {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
  color: var(--color-text-light);
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.about-grid h2 {
  font-size: 2rem;
  color: var(--color-secondary);
  margin: 0 0 1rem;
}

.team {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.team-member {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  box-shadow: var(--shadow);
}

.team-member strong {
  display: block;
  color: var(--color-secondary);
}

.team-member a {
  font-size: 0.9rem;
}

/* Content pages */
.page-header {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: white;
  padding: 4rem 0 3rem;
}

.page-header h1 {
  margin: 0;
  font-size: 2.5rem;
}

.page-header p {
  margin: 0.5rem 0 0;
  color: #cbd5e1;
}

.content {
  max-width: 800px;
  margin: 0 auto;
}

.content h2 {
  color: var(--color-secondary);
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-border);
}

.content h3 {
  color: var(--color-secondary);
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
}

.content p,
.content li {
  color: var(--color-text);
}

.content ul {
  padding-left: 1.5rem;
}

/* Settings table */
.settings-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  background: white;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.settings-table th,
.settings-table td {
  padding: 1rem 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.settings-table th {
  background: var(--color-secondary);
  color: white;
  font-weight: 600;
}

.settings-table td:first-child {
  font-weight: 600;
  color: var(--color-secondary);
  width: 35%;
}

.settings-table tr:last-child th,
.settings-table tr:last-child td {
  border-bottom: none;
}

/* CTA */
.cta {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: white;
  text-align: center;
  padding: 4rem 0;
  border-radius: var(--radius);
  margin: 2rem auto;
  max-width: var(--max-width);
}

.cta h2 {
  margin: 0 0 1rem;
  font-size: 2rem;
}

.cta p {
  margin: 0 0 1.5rem;
  opacity: 0.95;
}

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

/* Footer */
.site-footer {
  background: var(--color-secondary);
  color: #94a3b8;
  padding: 3rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.site-footer h4 {
  color: white;
  margin: 0 0 1rem;
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer li {
  margin-bottom: 0.5rem;
}

.site-footer a {
  color: #94a3b8;
}

.site-footer a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid #334155;
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.9rem;
}

/* Mobile menu */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-secondary);
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: white;
    border-bottom: 1px solid var(--color-border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .main-nav.open {
    max-height: 300px;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 1rem;
  }

  .main-nav li {
    border-bottom: 1px solid var(--color-border);
  }

  .main-nav a {
    display: block;
    padding: 0.75rem 0;
  }

  .hero {
    padding: 4rem 0 3rem;
  }

  .btn-outline {
    margin-left: 0;
    margin-top: 0.75rem;
  }

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