:root {
  --primary: #0a2d7a;
  --primary-dark: #061b4d;
  --accent: #1a6ce5;
  --accent-glow: rgba(26, 108, 229, 0.25);
  --dark: #06122b;
  --light: #f5f8ff;
  --white: #ffffff;
  --gray: #5c6f8f;
  --radius: 16px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--dark);
  line-height: 1.6;
  background: var(--light);
  -webkit-font-smoothing: antialiased;
}

.container {
  width: min(1200px, 92%);
  margin: 0 auto;
}

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

/* ============ NAVBAR ============ */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 200;
  background: rgba(6, 18, 43, 0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo img {
  height: 44px;
  width: auto;
}

.logo-text {
  color: var(--white);
  font-weight: 800;
  font-size: 15px;
  line-height: 1.2;
  letter-spacing: 0.3px;
}

.logo-text span {
  display: block;
  color: var(--accent);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

nav {
  display: flex;
  align-items: center;
}

nav a {
  color: #c6d0e6;
  text-decoration: none;
  margin-left: 22px;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}

nav a:hover,
nav a.active {
  color: var(--accent);
}

.nav-social {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 20px;
  padding-left: 16px;
  border-left: 1px solid rgba(255, 255, 255, 0.12);
}

.social-btn {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.06);
  color: #c6d0e6;
  text-decoration: none;
  font-size: 12px;
  font-weight: 700;
  transition: all 0.25s;
}

.social-btn:hover {
  background: var(--accent);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px var(--accent-glow);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--accent);
  color: var(--white);
  padding: 13px 28px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  border: none;
  cursor: pointer;
  transition: all 0.25s;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px var(--accent-glow);
  background: #2a7af5;
}

/* ============ SECTIONS ============ */
section {
  padding: 100px 0;
}

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--primary);
  letter-spacing: -0.5px;
}

.section-sub {
  color: var(--gray);
  margin-bottom: 50px;
  max-width: 620px;
  font-size: 16px;
  line-height: 1.7;
}

/* ============ FOOTER ============ */
footer {
  background: var(--dark);
  color: #8a98b8;
  padding: 60px 0 30px;
  text-align: center;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 18px;
}

.footer-top img {
  height: 36px;
  opacity: 0.7;
}

.footer-top strong {
  color: var(--white);
  font-size: 16px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  margin-top: 18px;
}

.footer-bottom p {
  font-size: 13px;
}

.btn-admin {
  padding: 7px 18px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  color: #8a98b8;
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.2s;
}

.btn-admin:hover {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
}

/* ============ RESPONSIVE ============ */
@media (max-width: 900px) {
  nav a:not(.btn) {
    display: none;
  }
  .nav-social {
    display: none;
  }
}

@media (max-width: 600px) {
  .logo-text {
    display: none;
  }
}