:root {
  color-scheme: dark;
  --color-background: #0b0f14;
  --color-surface: #121926;
  --color-border: #273043;
  --color-text: #f4f7ff;
  --color-muted: #9aa4b2;
  --color-accent: #5b8cff;
  --color-accent-glow: rgba(91, 140, 255, 0.35);
  --color-focus: #7aa3ff;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --radius-sm: 8px;
  --radius-md: 16px;
  --shadow-soft: 0 18px 45px rgba(5, 12, 24, 0.55);
  --shadow-glow: 0 0 24px rgba(91, 140, 255, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  margin: 0;
  background: var(--color-background);
  color: var(--color-text);
  line-height: 1.6;
}

a {
  color: inherit;
}

.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}

.site-header {
  background: rgba(11, 15, 20, 0.9);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) 0;
  gap: var(--space-2);
}

.brand {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.nav {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.nav a {
  color: var(--color-muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.nav a:hover,
.nav a:focus {
  color: var(--color-text);
}

.page-content {
  padding: var(--space-4) 0 var(--space-4);
}

.hero {
  padding: var(--space-4) 0;
  display: grid;
  gap: var(--space-2);
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin: 0;
}

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

.button,
.button-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.75rem 1.6rem;
  border-radius: 999px;
  text-decoration: none;
  border: 1px solid transparent;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.button-primary {
  background: linear-gradient(120deg, #5b8cff, #7aa3ff);
  color: #0b0f14;
  box-shadow: var(--shadow-glow);
}

.button-primary:hover,
.button-primary:focus {
  transform: translateY(-1px);
  box-shadow: 0 0 32px rgba(91, 140, 255, 0.45);
}

.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.4rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  text-decoration: none;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  box-shadow: var(--shadow-soft);
}

.order-form {
  display: grid;
  gap: var(--space-2);
}

.field {
  display: grid;
  gap: 0.4rem;
  font-size: 0.95rem;
}

.input {
  width: 100%;
  padding: 0.75rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: #0f1624;
  color: var(--color-text);
}

.input::placeholder {
  color: rgba(154, 164, 178, 0.7);
}

.input:focus {
  outline: 2px solid transparent;
  border-color: var(--color-focus);
  box-shadow: 0 0 0 3px rgba(122, 163, 255, 0.25);
}

.helper-text {
  color: var(--color-muted);
  font-size: 0.85rem;
}

.field-error {
  color: #ffb4b4;
  font-size: 0.85rem;
}

.error-summary {
  background: rgba(255, 90, 90, 0.12);
  border: 1px solid rgba(255, 90, 90, 0.35);
  color: #ffd2d2;
  border-radius: var(--radius-sm);
  padding: var(--space-2);
}

.error-summary ul {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
}

.site-footer {
  padding: var(--space-3) 0;
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
}

@media (max-width: 640px) {
  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
  }
}