:root {
  --bg: #050816;
  --bg-alt: #0b1020;
  --accent: #7c3aed;
  --accent-soft: rgba(124, 58, 237, 0.15);
  --text: #f9fafb;
  --muted: #9ca3af;
  --border: #1f2933;
  --radius: 10px;
  --shadow-soft: 0 18px 40px rgba(0, 0, 0, 0.45);
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: radial-gradient(circle at top, #111827 0, #020617 55%);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 6vw;
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(16px);
  background: linear-gradient(to bottom, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.6));
  position: sticky;
  top: 0;
  z-index: 10;
}

.logo {
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.9rem;
  color: var(--muted);
}

.nav a {
  margin-left: 1.5rem;
  text-decoration: none;
  color: var(--muted);
  font-size: 0.95rem;
  position: relative;
  padding-bottom: 0.2rem;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #22d3ee, #7c3aed);
  transition: width 0.2s ease;
}

.nav a:hover::after,
.nav a.active::after {
  width: 100%;
}

.nav a.active {
  color: var(--text);
}

/* Hero */

.hero {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 6vw;
}

.hero-content {
  max-width: 720px;
  background: radial-gradient(circle at top left, rgba(124, 58, 237, 0.18), transparent 55%),
              radial-gradient(circle at bottom right, rgba(56, 189, 248, 0.18), transparent 55%),
              linear-gradient(to bottom right, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.9));
  border-radius: 24px;
  padding: 2.8rem 2.4rem;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.hero h1 {
  font-size: clamp(2.2rem, 3vw, 2.8rem);
  margin-bottom: 1rem;
}

.hero p {
  color: var(--muted);
  line-height: 1.6;
}

.hero-actions {
  margin-top: 1.8rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.hero-note {
  margin-top: 1.2rem;
  color: #a5b4fc;
  font-size: 0.95rem;
}

/* Pages */

.page {
  flex: 1;
  padding: 3rem 6vw;
  display: flex;
  justify-content: center;
}

.page-section {
  max-width: 720px;
  background: linear-gradient(to bottom right, rgba(15, 23, 42, 0.96), rgba(15, 23, 42, 0.9));
  border-radius: 20px;
  padding: 2.4rem 2.2rem;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.page-section h1 {
  margin-top: 0;
  margin-bottom: 1rem;
}

.page-section p {
  color: var(--muted);
  line-height: 1.6;
}

/* Buttons */

.btn {
  border: none;
  border-radius: 999px;
  padding: 0.7rem 1.4rem;
  font-size: 0.95rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease, color 0.12s ease;
}

.btn.primary {
  background: linear-gradient(135deg, #7c3aed, #22d3ee);
  color: #0b1020;
  font-weight: 600;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.7);
}

.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.9);
}

.btn.secondary {
  background: rgba(15, 23, 42, 0.9);
  color: var(--muted);
  border: 1px solid rgba(148, 163, 184, 0.4);
}

.btn.secondary:hover {
  background: rgba(15, 23, 42, 1);
  color: var(--text);
}

/* Form */

.form {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form label {
  display: flex;
  flex-direction: column;
  font-size: 0.9rem;
  color: var(--muted);
  gap: 0.35rem;
}

.form input,
.form textarea {
  border-radius: var(--radius);
  border: 1px solid rgba(148, 163, 184, 0.4);
  padding: 0.6rem 0.7rem;
  background: rgba(15, 23, 42, 0.9);
  color: var(--text);
  font: inherit;
}

.form input:focus,
.form textarea:focus {
  outline: 2px solid rgba(124, 58, 237, 0.7);
  outline-offset: 1px;
}

.form-note {
  font-size: 0.9rem;
  color: #a5b4fc;
}

/* Footer */

.site-footer {
  padding: 1.2rem 6vw;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted);
  text-align: center;
  background: rgba(2, 6, 23, 0.95);
}

/* Responsive */

@media (max-width: 720px) {
  .site-header {
    padding: 0.9rem 1.2rem;
  }

  .hero,
  .page {
    padding: 2.2rem 1.2rem;
  }

  .hero-content,
  .page-section {
    padding: 1.8rem 1.5rem;
  }

  .nav a {
    margin-left: 0.9rem;
  }
}