:root {
  --bg: #f8fafc;
  --text: #1f2937;
  --primary: #0f4c81;
  --primary-2: #1d7cbf;
  --white: #ffffff;
  --muted: #64748b;
  --border: #e5e7eb;
  --dark: #0f172a;
  --success: #22c55e;
  --radius: 12px;
  --radius-lg: 16px;
  --shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--bg);
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; border-radius: var(--radius); }
section[id] { scroll-margin-top: 92px; }
.container { width: min(90%, 1120px); margin: 0 auto; }

header {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.nav { display: flex; justify-content: space-between; align-items: center; padding: 16px 0; gap: 12px; }
.logo { font-size: 24px; font-weight: 700; color: var(--primary); }
.nav-links { display: flex; gap: 18px; flex-wrap: wrap; font-size: 14px; }

.lang-switch {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
}
.lang-switch button {
  border: 0;
  padding: 6px 12px;
  background: var(--white);
  font-size: 13px;
  cursor: pointer;
}
.lang-switch button[aria-pressed="true"] { background: var(--primary); color: var(--white); }

.nav-links a:hover,
.nav-links a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--primary-2);
  outline-offset: 2px;
}

.hero {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: var(--white);
  padding: 72px 0 56px;
}
.hero-content { display: grid; grid-template-columns: 1.2fr 1fr; gap: 32px; align-items: center; }
.hero h1 { font-size: clamp(32px, 4vw, 42px); line-height: 1.15; margin-bottom: 18px; }
.hero p { font-size: 17px; margin-bottom: 24px; color: #e5f0fb; }
.btn-group { display: flex; gap: 12px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 12px 18px; border-radius: 10px; font-weight: 600; font-size: 15px; }
.btn-primary { background: var(--success); color: var(--white); }
.btn-secondary { background: var(--white); color: var(--primary); }

.hero-card {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 18px;
  padding: 24px;
  backdrop-filter: blur(6px);
}
.hero-card h3 { margin-bottom: 12px; font-size: 22px; }
.hero-card ul { padding-left: 18px; }

section { padding: 64px 0; }
.section-title { text-align: center; margin-bottom: 36px; }
.section-title h2 { font-size: clamp(26px, 3vw, 32px); color: var(--dark); margin-bottom: 10px; }
.section-title p { color: var(--muted); max-width: 760px; margin: 0 auto; }

.services { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.card,
.video-wrap,
.form-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}
.card h3 { font-size: 20px; margin-bottom: 10px; color: var(--primary); }

.about-grid,
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: center; }
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.gallery img { height: 240px; object-fit: cover; width: 100%; background: var(--border); }

.video-frame { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; border-radius: 14px; }
.video-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.contact-info p { margin-bottom: 10px; }

.form-card h3 { color: var(--dark); margin-bottom: 8px; }
.form-card p { color: var(--muted); margin-bottom: 14px; }
.form-grid { display: grid; gap: 10px; }
.form-grid input,
.form-grid textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
}
.form-grid textarea { min-height: 110px; resize: vertical; }
.form-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 10px; }
.small-note { font-size: 12px; color: var(--muted); margin-top: 8px; }

footer { background: var(--dark); color: #cbd5e1; padding: 24px 0; text-align: center; font-size: 14px; }

@media (max-width: 900px) {
  .hero-content,
  .about-grid,
  .contact-grid,
  .services,
  .gallery { grid-template-columns: 1fr; }
  .nav { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}