:root {
  --color-primary: #1e3c72;
  --color-primary-2: #2a5298;
  --color-primary-3: #3f6fd1;
  --color-accent: #ffd700;
  --color-accent-soft: #ffe680;
  --color-cyan-soft: #62d8ff;
  --color-violet-soft: #a78bfa;
  --color-bg: #eef3ff;
  --color-surface: #ffffff;
  --color-surface-glass: rgba(255, 255, 255, 0.72);
  --color-text: #1f2937;
  --color-muted: #6b7280;
  --shadow-sm: 0 8px 24px rgba(13, 24, 45, 0.12);
  --shadow-md: 0 16px 38px rgba(13, 24, 45, 0.18);
  --shadow-glow: 0 0 0 1px rgba(255, 255, 255, 0.4), 0 20px 50px rgba(63, 111, 209, 0.25);
  --radius-lg: 20px;
  --radius-md: 12px;
}

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

html, body {
  overflow-x: hidden;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background:
    radial-gradient(circle at 10% 10%, rgba(98, 216, 255, 0.18), transparent 35%),
    radial-gradient(circle at 85% 15%, rgba(167, 139, 250, 0.18), transparent 30%),
    linear-gradient(180deg, #f7f9ff 0%, var(--color-bg) 100%);
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: linear-gradient(120deg, #102347, var(--color-primary), var(--color-primary-3));
  color: #fff;
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.9rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 800;
  font-size: 1.3rem;
  letter-spacing: 0.4px;
}

.brand img {
  width: 34px;
  height: 34px;
  object-fit: contain;
}

.nav-btn {
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  padding: 0.65rem 1.1rem;
  font-weight: 600;
  transition: 0.25s ease;
}

.nav-btn:hover {
  transform: translateY(-1px);
  background: var(--color-accent);
  color: var(--color-primary);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.section-title {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: 1.2rem;
}

.card {
  background: var(--color-surface-glass);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border: none;
  cursor: pointer;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-soft));
  color: #12284e;
  font-weight: 800;
  border-radius: 999px;
  padding: 0.85rem 1.25rem;
  transition: 0.25s ease;
  box-shadow: 0 10px 25px rgba(255, 215, 0, 0.32);
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.01);
  box-shadow: 0 14px 30px rgba(255, 215, 0, 0.42);
}

.site-footer {
  margin-top: 3rem;
  background: #111827;
  color: #d1d5db;
  text-align: center;
  padding: 1.3rem 1rem;
  font-size: 0.92rem;
}