/* ===== Base & Variables ===== */
:root {
  --navy: #0a1628;
  --navy-light: #12233d;
  --blue: #1e90ff;
  --blue-bright: #3b9eff;
  --silver: #e8eef5;
  --white: #ffffff;
  --orange: #f5a623;
  --text: #1a1a1a;
  --text-light: #4a5568;
  --radius: 12px;
  --shadow: 0 10px 40px rgba(10, 22, 40, 0.12);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--white);
}

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

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

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Header ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(10, 22, 40, 0.08);
}

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

.logo-img {
  height: 48px;
  width: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--navy);
  transition: color 0.2s;
}

.nav a:hover {
  color: var(--blue);
}

.btn-nav {
  background: var(--navy) !important;
  color: white !important;
  padding: 10px 20px !important;
  border-radius: 8px !important;
  font-weight: 600 !important;
}

.btn-nav:hover {
  background: var(--navy-light) !important;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  cursor: pointer;
  color: var(--navy);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, #1a3a6b, #0a1628);
  color: white;
  box-shadow: 0 4px 14px rgba(10, 22, 40, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(10, 22, 40, 0.35);
}

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

.btn-secondary:hover {
  background: var(--navy);
  color: white;
}

.btn-large {
  padding: 18px 40px;
  font-size: 1.15rem;
}

/* ===== Hero ===== */
.hero {
  background: linear-gradient(160deg, #0a1628 0%, #12233d 40%, #1a3a6b 100%);
  color: white;
  padding: 60px 0 80px;
  overflow: hidden;
}

.hero-content {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.hero-tag {
  display: inline-block;
  background: rgba(255, 255, 255, 0.12);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.35rem;
  font-weight: 600;
  color: #7ec8ff;
  margin-bottom: 20px;
}

.hero-desc {
  font-size: 1.1rem;
  opacity: 0.9;
  max-width: 480px;
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-logo img {
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
  filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.35));
  border-radius: 12px;
}

/* ===== Sections ===== */
.section {
  padding: 80px 0;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 800;
  color: var(--navy);
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.section-intro {
  text-align: center;
  color: var(--text-light);
  font-size: 1.1rem;
  max-width: 560px;
  margin: 0 auto 48px;
}

/* ===== Services ===== */
.services {
  background: #f7f9fc;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.service-card {
  background: white;
  padding: 32px 28px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(10, 22, 40, 0.14);
}

.service-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.service-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
}

.service-card p {
  color: var(--text-light);
  font-size: 0.98rem;
}

/* ===== Why Us ===== */
.why-us {
  background: white;
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
}

.why-item {
  text-align: center;
  padding: 20px;
}

.why-item h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
}

.why-item p {
  color: var(--text-light);
}

/* ===== Area ===== */
.area {
  background: linear-gradient(160deg, #0a1628, #12233d);
  color: white;
}

.area .section-title {
  color: white;
}

.area .section-intro {
  color: rgba(255, 255, 255, 0.8);
}

.area-content {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
  font-size: 1.15rem;
  line-height: 1.8;
}

.area-note {
  margin-top: 16px;
  font-weight: 500;
  color: #7ec8ff;
}

/* ===== Contact ===== */
.contact {
  background: #f7f9fc;
  text-align: center;
}

.contact h2 {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 12px;
}

.contact-text {
  font-size: 1.2rem;
  color: var(--text-light);
  margin-bottom: 28px;
}

.contact-note {
  margin-top: 20px;
  font-size: 0.9rem;
  color: #888;
}

/* ===== Footer ===== */
.footer {
  background: var(--navy);
  color: rgba(255, 255, 255, 0.85);
  text-align: center;
  padding: 48px 20px 32px;
}

.footer-logo {
  height: 70px;
  margin: 0 auto 20px;
  border-radius: 8px;
}

.footer p {
  margin-bottom: 6px;
}

.footer-tag {
  color: #7ec8ff;
  font-weight: 600;
  margin: 12px 0 20px !important;
}

.copyright {
  font-size: 0.85rem;
  opacity: 0.6;
  margin-top: 20px !important;
}

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

  .nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 20px;
    gap: 16px;
    border-bottom: 1px solid #eee;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  }

  .nav.open {
    display: flex;
  }

  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-ctas {
    justify-content: center;
  }

  .hero-logo {
    order: -1;
  }

  .hero-logo img {
    max-width: 280px;
  }

  .section {
    padding: 60px 0;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 40px 0 60px;
  }

  .btn {
    width: 100%;
  }

  .hero-ctas {
    flex-direction: column;
  }
}