:root {
  color-scheme: light;
  font-family: 'Inter', sans-serif;
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-strong: #f1f5f9;
  --text: #0f172a;
  --muted: #475569;
  --border: #e2e8f0;
  --primary: #0f172a;
  --primary-soft: #e0f2fe;
  --primary-dark: #164e63;
  --accent: #0ea5e9;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: radial-gradient(circle at top left, rgba(14, 165, 233, 0.12), transparent 28%),
    radial-gradient(circle at top right, rgba(56, 189, 248, 0.1), transparent 22%),
    var(--bg);
  color: var(--text);
}

body, input, textarea, button, select {
  font-family: 'Inter', sans-serif;
}

.page-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1rem;
}

.site-header {
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226,232,240,0.8);
}

.site-footer {
  color: var(--muted);
}

.card-surface {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1.75rem;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.08);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  transition: background .2s ease, transform .2s ease;
}

.btn-primary:hover,
.btn-primary:focus {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--surface-strong);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover,
.btn-secondary:focus {
  background: var(--surface);
}

.input-field,
.textarea-field,
.select-field {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 0.9rem 1rem;
  color: var(--text);
}

.input-field:focus,
.textarea-field:focus,
.select-field:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(14,165,233,0.15);
}

.hero-title {
  text-shadow: 0 12px 45px rgba(15, 23, 42, 0.08);
}

@media (max-width: 640px) {
  .section-gap { padding-top: 2rem; padding-bottom: 2rem; }
}