:root {
  --bg: #01064f;
  --bg-elevated: #090f3c;
  --bg-soft: #11195a;
  --text: #f0edff;
  --muted: #b3b0d9;
  --accent: #7f4eff;
  --accent-strong: #6330db;
  --accent-soft: #ba72f2;
  --border: #2f2b79;
  --danger: #ff89ad;
  --success: #8fd6ff;
  --shadow: 0 18px 38px rgba(0, 0, 0, 0.35);
  --radius: 16px;
  --font-body: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-display: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(circle at 14% 14%, rgba(186, 114, 242, 0.2), transparent 38%),
    radial-gradient(circle at 84% 2%, rgba(127, 78, 255, 0.18), transparent 34%),
    linear-gradient(180deg, #01064f 0%, #070c3b 50%, #01064f 100%);
  line-height: 1.5;
}

body,
input,
select,
button,
textarea {
  font-family: var(--font-body);
}

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

.container {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.section {
  padding: 5.5rem 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(9px);
  background: rgba(3, 7, 45, 0.84);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 72px;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.brand-logo {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.28);
}

.brand-text {
  color: var(--accent-soft);
  font-family: var(--font-body);
  letter-spacing: 0.03em;
}

.site-nav {
  display: flex;
  gap: 1.15rem;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--muted);
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: color 0.25s ease, transform 0.25s ease;
}

.site-nav a:hover {
  color: var(--text);
  transform: translateY(-2px);
}

.hero {
  padding-top: 6.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.5rem;
  align-items: center;
}

.eyebrow {
  color: var(--accent-soft);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.8rem;
  font-weight: 700;
  margin: 0;
}

h1,
h2,
h3,
legend {
  margin: 0;
  line-height: 1.2;
  font-family: var(--font-body);
}

h1 {
  margin-top: 0.7rem;
  font-size: clamp(2rem, 4vw, 3.4rem);
}

.hero-text {
  margin: 1rem 0 1.8rem;
  color: var(--muted);
  max-width: 60ch;
}

.hero-card,
.card {
  background: linear-gradient(145deg, rgba(20, 25, 76, 0.9), rgba(11, 17, 54, 0.95));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 1.5rem;
}

.hero-card ul {
  margin: 1rem 0 0;
  padding-left: 1.15rem;
  color: var(--muted);
}

.hero-card li + li {
  margin-top: 0.6rem;
}

.section-title {
  font-size: clamp(1.4rem, 2.8vw, 2rem);
}

.section-subtitle {
  margin: 0.7rem 0 1.3rem;
  color: var(--muted);
}

.pricing-grid {
  margin-top: 1.8rem;
  display: grid;
  grid-template-columns: repeat(4, minmax(160px, 1fr));
  gap: 1rem;
}

.rate-card {
  padding: 1.1rem;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.rate-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
}

.rate {
  margin-top: 0.85rem;
  font-size: 1.22rem;
  color: var(--accent-soft);
  font-weight: 700;
}

.payment-card {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
}

.payment-card h3 {
  margin-bottom: 0.55rem;
}

.payment-card p {
  margin: 0.3rem 0;
  color: var(--muted);
}

.calculator-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr;
  gap: 1rem;
  align-items: start;
}

.calculator-card,
.order-card,
.summary-card {
  padding: 1.4rem;
}

.order-shell {
  max-width: 760px;
  margin: 0 auto;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(140px, 1fr));
  gap: 0.85rem;
}

.input-group {
  margin-top: 0.95rem;
}

.input-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.input-group small {
  display: block;
  color: var(--muted);
  margin-top: 0.35rem;
  font-size: 0.83rem;
}

input,
select,
button {
  font: inherit;
}

input,
select {
  width: 100%;
  background: #0d1450;
  color: var(--text);
  border: 1px solid #3a3b89;
  border-radius: 10px;
  padding: 0.72rem 0.8rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(138, 99, 255, 0.24);
  outline: none;
}

input:user-invalid,
select:user-invalid {
  border-color: var(--danger);
}

.model-choice {
  margin-top: 1.1rem;
  padding: 0.9rem;
  border: 1px solid var(--border);
  border-radius: 12px;
}

.model-choice legend {
  padding: 0 0.35rem;
  font-weight: 700;
}

.radio-option,
.checkbox-option {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-top: 0.6rem;
  color: var(--muted);
}

.radio-option input,
.checkbox-option input {
  width: auto;
  margin: 0;
}

.contact-help {
  display: block;
  margin-top: 0.5rem;
  color: var(--muted);
  font-size: 0.84rem;
}

.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  border: none;
  cursor: pointer;
  border-radius: 999px;
  padding: 0.74rem 1.25rem;
  font-weight: 700;
  transition: transform 0.25s ease, filter 0.25s ease, box-shadow 0.25s ease;
}

.btn-primary {
  background: linear-gradient(120deg, var(--accent), #b095ff);
  color: #140c2b;
  box-shadow: 0 10px 24px rgba(138, 99, 255, 0.28);
}

.btn-primary:hover {
  transform: translateY(-3px);
  filter: brightness(1.05);
}

.summary-list {
  margin: 1rem 0;
  padding: 0;
}

.summary-list div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  padding: 0.42rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.summary-list dt,
.summary-list dd {
  margin: 0;
}

.total-row {
  margin-top: 1.05rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.1rem;
}

#totalPrice {
  color: var(--accent-soft);
  font-size: 1.42rem;
}

.summary-note {
  margin-top: 0.9rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.form-feedback {
  min-height: 1.5rem;
  margin-top: 1rem;
  font-weight: 700;
}

.form-feedback.success {
  color: var(--success);
}

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

.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 1.3rem 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  color: var(--muted);
}

.back-top {
  color: var(--accent-soft);
  transition: color 0.25s ease;
}

.back-top:hover {
  color: #c6bbff;
}

@media (max-width: 980px) {
  .pricing-grid {
    grid-template-columns: repeat(2, minmax(160px, 1fr));
  }

  .calculator-grid,
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 5rem;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 4.2rem 0;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .site-nav {
    gap: 0.8rem;
  }
}