:root {
  --bg: #0f172a;
  --panel: #111827;
  --card: #1f2937;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-dark: #0ea5e9;
  --border: rgba(148, 163, 184, 0.16);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background: linear-gradient(180deg, #0f172a, #111827);
  color: var(--text);
  min-height: 100vh;
}

a {
  color: var(--accent);
}

.hero {
  text-align: center;
  padding: 3.5rem 1.5rem 1rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.5rem);
}

.hero p {
  color: var(--muted);
  margin: 1rem auto 0;
  max-width: 720px;
}

.tabs {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  padding: 1rem;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.tab-btn {
  border: 0;
  border-radius: 999px;
  padding: 0.8rem 1.2rem;
  background: var(--card);
  color: var(--text);
  cursor: pointer;
  font-size: 1rem;
  transition: transform 0.15s ease, background 0.15s ease;
}

.tab-btn:hover {
  transform: translateY(-1px);
}

.tab-btn.active {
  background: var(--accent);
  color: #00111a;
  font-weight: bold;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem;
}

.tab {
  display: none;
  background: rgba(17, 24, 39, 0.88);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.tab.active {
  display: block;
}

.tab h2 {
  margin-top: 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.card {
  overflow: hidden;
  border-radius: 16px;
  background: var(--card);
  border: 1px solid var(--border);
}

.card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
  background: #0b1220;
}

.card-body {
  padding: 1rem;
}

.card-body h3 {
  margin: 0 0 0.5rem;
}

.card-body p {
  margin: 0;
  color: var(--muted);
}

.contact-info {
  margin: 1rem 0 1.5rem;
  color: var(--muted);
}

.contact-form {
  display: grid;
  gap: 1rem;
  max-width: 620px;
}

.contact-form label {
  display: grid;
  gap: 0.4rem;
  color: var(--text);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.9rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #0b1220;
  color: var(--text);
  font: inherit;
}

.submit-btn {
  width: fit-content;
  padding: 0.9rem 1.3rem;
  border: 0;
  border-radius: 12px;
  background: var(--accent);
  color: #00111a;
  font-weight: bold;
  cursor: pointer;
}

.submit-btn:hover {
  background: var(--accent-dark);
}

.footer {
  text-align: center;
  color: var(--muted);
  padding: 1rem 1.5rem 2rem;
}