/* ===== Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  color: #1a1a2e;
  line-height: 1.6;
  background: #fff;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ===== Colors ===== */
:root {
  --primary: #1e3a5f;
  --accent: #2d7dd2;
  --accent-light: #e8f1fb;
  --dark: #0d1b2a;
  --gray: #64748b;
  --light: #f8fafc;
  --white: #ffffff;
}

/* ===== Container ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== Header / Nav ===== */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #e2e8f0;
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.nav__logo {
  font-size: 22px; font-weight: 700; color: var(--primary);
  display: flex; align-items: center; gap: 10px;
}
.nav__logo span { color: var(--accent); }
.nav__links { display: flex; gap: 32px; }
.nav__links a {
  font-size: 15px; font-weight: 500; color: var(--gray);
  transition: color 0.2s;
}
.nav__links a:hover, .nav__links a.active { color: var(--accent); }
.nav__cta {
  padding: 10px 24px; background: var(--accent); color: #fff;
  border-radius: 8px; font-size: 14px; font-weight: 600;
  transition: background 0.2s;
}
.nav__cta:hover { background: var(--primary); }
.burger { display: none; flex-direction: column; gap: 5px; cursor: pointer; }
.burger span { display: block; width: 24px; height: 2px; background: var(--dark); transition: 0.3s; }

/* ===== Hero ===== */
.hero {
  padding: 160px 0 100px;
  background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
  color: #fff;
  text-align: center;
}
.hero h1 { font-size: 48px; font-weight: 700; line-height: 1.2; margin-bottom: 20px; }
.hero p { font-size: 18px; color: rgba(255,255,255,0.8); max-width: 680px; margin: 0 auto 36px; }
.hero__buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn-primary {
  padding: 14px 32px; background: var(--accent); color: #fff;
  border-radius: 8px; font-size: 16px; font-weight: 600;
  transition: transform 0.2s, background 0.2s;
}
.btn-primary:hover { background: #1a6abf; transform: translateY(-2px); }
.btn-outline {
  padding: 14px 32px; border: 2px solid rgba(255,255,255,0.4); color: #fff;
  border-radius: 8px; font-size: 16px; font-weight: 600;
  transition: border-color 0.2s, background 0.2s;
}
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); }

/* ===== Section Common ===== */
.section { padding: 80px 0; }
.section--gray { background: var(--light); }
.section__header { text-align: center; margin-bottom: 56px; }
.section__header h2 { font-size: 36px; font-weight: 700; color: var(--dark); margin-bottom: 12px; }
.section__header p { font-size: 17px; color: var(--gray); max-width: 600px; margin: 0 auto; }

/* ===== Services Grid ===== */
.services-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px;
}
.service-card {
  background: #fff; border-radius: 16px; padding: 40px 32px;
  border: 1px solid #e2e8f0;
  transition: transform 0.3s, box-shadow 0.3s;
}
.service-card:hover { transform: translateY(-6px); box-shadow: 0 20px 40px rgba(0,0,0,0.08); }
.service-card__icon {
  width: 56px; height: 56px; border-radius: 12px;
  background: var(--accent-light); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; margin-bottom: 20px;
}
.service-card h3 { font-size: 20px; font-weight: 600; margin-bottom: 12px; color: var(--dark); }
.service-card p { font-size: 15px; color: var(--gray); line-height: 1.7; }

/* ===== Stats ===== */
.stats { display: flex; justify-content: center; gap: 64px; padding: 48px 0; flex-wrap: wrap; }
.stat { text-align: center; }
.stat__number { font-size: 42px; font-weight: 700; color: var(--accent); }
.stat__label { font-size: 15px; color: var(--gray); margin-top: 4px; }

/* ===== About Section ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.about-grid__content h2 { font-size: 36px; font-weight: 700; color: var(--dark); margin-bottom: 16px; }
.about-grid__content p { font-size: 16px; color: var(--gray); margin-bottom: 16px; line-height: 1.8; }
.about-grid__image {
  background: linear-gradient(135deg, var(--accent-light), #dbeafe);
  border-radius: 20px; height: 400px;
  display: flex; align-items: center; justify-content: center;
  font-size: 80px;
}

/* ===== Features List ===== */
.features-list { display: flex; flex-direction: column; gap: 12px; margin-top: 24px; }
.features-list li {
  display: flex; align-items: center; gap: 12px;
  font-size: 15px; color: var(--dark);
}
.features-list li::before {
  content: "✓"; display: inline-flex; align-items: center; justify-content: center;
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--accent); color: #fff; font-size: 12px; font-weight: 700;
  flex-shrink: 0;
}

/* ===== Contact ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contact-info { display: flex; flex-direction: column; gap: 28px; }
.contact-item { display: flex; gap: 16px; }
.contact-item__icon {
  width: 48px; height: 48px; border-radius: 12px;
  background: var(--accent-light); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; flex-shrink: 0;
}
.contact-item h4 { font-size: 16px; font-weight: 600; color: var(--dark); margin-bottom: 4px; }
.contact-item p { font-size: 14px; color: var(--gray); }
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.contact-form input, .contact-form textarea {
  padding: 14px 18px; border: 1px solid #e2e8f0; border-radius: 10px;
  font-size: 15px; font-family: inherit; color: var(--dark);
  transition: border-color 0.2s;
}
.contact-form input:focus, .contact-form textarea:focus {
  outline: none; border-color: var(--accent);
}
.contact-form textarea { resize: vertical; min-height: 120px; }
.contact-form button {
  padding: 14px 32px; background: var(--accent); color: #fff;
  border: none; border-radius: 10px; font-size: 16px; font-weight: 600;
  cursor: pointer; transition: background 0.2s;
}
.contact-form button:hover { background: var(--primary); }

/* ===== Footer ===== */
.footer {
  background: var(--dark); color: rgba(255,255,255,0.7); padding: 60px 0 32px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer__brand h3 { font-size: 20px; color: #fff; margin-bottom: 12px; }
.footer__brand p { font-size: 14px; line-height: 1.7; }
.footer__col h4 { font-size: 15px; color: #fff; margin-bottom: 16px; font-weight: 600; }
.footer__col a { display: block; font-size: 14px; color: rgba(255,255,255,0.6); margin-bottom: 10px; transition: color 0.2s; }
.footer__col a:hover { color: var(--accent); }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1); padding-top: 24px;
  text-align: center; font-size: 13px;
}

/* ===== Page Header (inner pages) ===== */
.page-header {
  padding: 140px 0 60px;
  background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
  color: #fff; text-align: center;
}
.page-header h1 { font-size: 40px; font-weight: 700; margin-bottom: 12px; }
.page-header p { font-size: 17px; color: rgba(255,255,255,0.7); }

/* ===== Services Detail (services page) ===== */
.service-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; padding: 48px 0; }
.service-detail:nth-child(even) { direction: rtl; }
.service-detail:nth-child(even) > * { direction: ltr; }
.service-detail__content h3 { font-size: 28px; font-weight: 700; color: var(--dark); margin-bottom: 12px; }
.service-detail__content p { font-size: 15px; color: var(--gray); line-height: 1.8; margin-bottom: 16px; }
.service-detail__visual {
  background: var(--accent-light); border-radius: 20px; height: 300px;
  display: flex; align-items: center; justify-content: center; font-size: 64px;
}

/* ===== Team Grid ===== */
.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.team-card { text-align: center; }
.team-card__avatar {
  width: 120px; height: 120px; border-radius: 50%; margin: 0 auto 16px;
  background: var(--accent-light); display: flex; align-items: center; justify-content: center;
  font-size: 40px; color: var(--accent);
}
.team-card h4 { font-size: 18px; font-weight: 600; color: var(--dark); }
.team-card p { font-size: 14px; color: var(--gray); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .burger { display: flex; }
  .nav__links, .nav__cta { display: none; }
  .nav__links.open {
    display: flex; flex-direction: column; position: absolute;
    top: 72px; left: 0; right: 0; background: #fff;
    padding: 24px; gap: 16px; border-bottom: 1px solid #e2e8f0;
  }
  .hero h1 { font-size: 32px; }
  .hero { padding: 120px 0 60px; }
  .services-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats { gap: 32px; }
  .service-detail { grid-template-columns: 1fr; }
  .service-detail:nth-child(even) { direction: ltr; }
  .team-grid { grid-template-columns: 1fr; }
}