:root {
  color-scheme: dark;
  --bg: #030712;
  --panel: #0b1220;
  --border: rgba(148, 163, 184, 0.22);
  --text: #f8fafc;
  --muted: #a6b0c3;
  --blue: #3b82f6;
  --danger: #fca5a5;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 50% 0%, rgba(59, 130, 246, 0.16), transparent 30rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

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

.contact-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 2rem);
  border-bottom: 1px solid rgba(148, 163, 184, 0.18);
  background: rgba(3, 7, 18, 0.86);
}

.brand {
  color: var(--blue);
  font-weight: 900;
  letter-spacing: 0;
}

.brand span {
  color: var(--text);
}

nav {
  display: flex;
  gap: clamp(0.8rem, 3vw, 1.5rem);
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

nav a:hover,
nav a:focus-visible {
  color: #bfdbfe;
}

main {
  width: min(760px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 4rem 0;
}

.contact-hero {
  margin-bottom: 2rem;
  text-align: center;
}

.contact-hero h1 {
  margin: 0;
  font-size: clamp(2.4rem, 7vw, 4rem);
  line-height: 1.08;
}

.contact-hero p {
  margin: 1rem auto 0;
  max-width: 36rem;
  color: var(--muted);
}

.contact-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(11, 18, 32, 0.86);
  padding: clamp(1.25rem, 4vw, 2rem);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
}

.contact-card h2 {
  margin: 0 0 1.25rem;
  font-size: 1.5rem;
}

form {
  display: grid;
  gap: 0.65rem;
}

label {
  color: #dbeafe;
  font-size: 0.92rem;
  font-weight: 800;
}

input,
textarea {
  width: 100%;
  border: 1px solid rgba(148, 163, 184, 0.24);
  border-radius: var(--radius);
  background: #050a14;
  color: var(--text);
  font: inherit;
  padding: 0.75rem 0.85rem;
}

textarea {
  min-height: 10rem;
  resize: vertical;
}

input:focus,
textarea:focus {
  border-color: #60a5fa;
  outline: 2px solid rgba(96, 165, 250, 0.22);
}

.invalid {
  border-color: var(--danger);
}

.form-message {
  min-height: 1.5rem;
  margin: 0.5rem 0 0;
  color: var(--muted);
}

.form-message.error {
  color: var(--danger);
}

button {
  min-height: 2.8rem;
  border: 0;
  border-radius: var(--radius);
  background: #2563eb;
  color: #fff;
  font: inherit;
  font-weight: 900;
  cursor: pointer;
}

button:disabled {
  cursor: wait;
  opacity: 0.65;
}

.site-footer {
  width: min(760px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.5rem 0 2rem;
  border-top: 1px solid rgba(148, 163, 184, 0.18);
  color: var(--muted);
  font-size: 0.92rem;
}

.site-footer p {
  margin: 0.35rem 0 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  margin-top: 0.6rem;
}

.footer-links a {
  color: #dbeafe;
}

@media (max-width: 720px) {
  .contact-header {
    align-items: flex-start;
    flex-direction: column;
  }

  nav {
    flex-wrap: wrap;
  }
}

@media (max-width: 560px) {
  .contact-header {
    gap: 0.75rem;
    padding: 0.85rem 1rem;
  }

  nav {
    gap: 0.55rem 0.8rem;
    font-size: 0.86rem;
  }

  main {
    width: min(100% - 1.25rem, 760px);
    padding: 2.5rem 0;
  }

  .contact-hero {
    margin-bottom: 1.4rem;
  }

  .contact-hero h1 {
    font-size: clamp(2rem, 11vw, 3rem);
  }

  .contact-card {
    padding: 1rem;
  }

  input,
  textarea,
  button {
    font-size: 1rem;
  }
}