:root {
  --bg-main: #050816;
  --bg-alt: #0b1020;
  --bg-light: #f5f7fb;
  --text-main: #f9fafb;
  --text-dark: #0b1020;
  --accent: #1e90ff;
  --accent-soft: #00d4ff;
  --border-subtle: rgba(255, 255, 255, 0.08);
  --card-bg: rgba(11, 16, 32, 0.9);
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.35);
  --shadow-light: 0 6px 18px rgba(15, 23, 42, 0.18);
  --max-width: 1120px;
}

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

html, body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #111827 0, #020617 40%, #000 100%);
  color: var(--text-main);
}

body {
  line-height: 1.6;
}

a {
  color: var(--accent-soft);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header & Navigation */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(5, 8, 22, 0.92);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.35);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-main);
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 0.9rem;
  background: radial-gradient(circle at 20% 0, #38bdf8, #0f172a);
  box-shadow: 0 0 22px rgba(56, 189, 248, 0.55);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.07em;
}

.logo-text {
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #e5e7eb;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.92rem;
}

.site-nav a {
  color: #cbd5f5;
  position: relative;
  padding-bottom: 0.15rem;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.15rem;
  width: 0;
  height: 2px;
  background: linear-gradient(to right, var(--accent-soft), var(--accent));
  transition: width 0.2s ease;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-soft));
  color: white !important;
  padding: 0.5rem 1.2rem;
  border-radius: 999px;
  border: none;
  font-weight: 600;
  box-shadow: 0 10px 25px rgba(30, 144, 255, 0.35);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-primary:hover {
  box-shadow: 0 16px 32px rgba(30, 144, 255, 0.45);
  transform: translateY(-1px);
}

.btn-secondary {
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.7);
  padding: 0.5rem 1.2rem;
  color: #e5e7eb;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-secondary:hover {
  background: rgba(15, 23, 42, 0.95);
}

.btn-full {
  display: block;
  text-align: center;
  width: 100%;
  padding: 0.6rem 1rem;
  border-radius: 0.9rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-soft));
  color: white;
  font-weight: 600;
  box-shadow: var(--shadow-soft);
}

.btn-primary.full {
  width: 100%;
}

/* Mobile nav */

.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
  cursor: pointer;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
  display: block;
  width: 22px;
  height: 2px;
  background: #e5e7eb;
  border-radius: 999px;
  position: relative;
}

.nav-toggle-label span::before,
.nav-toggle-label span::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle-label span::before {
  top: -6px;
}

.nav-toggle-label span::after {
  top: 6px;
}

/* Hero */

.hero {
  padding: 4.5rem 0 3.5rem;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 2.5rem;
  align-items: center;
}

.hero-text h1 {
  font-size: clamp(2.1rem, 3vw, 2.7rem);
  line-height: 1.15;
  margin-bottom: 1rem;
}

.hero-sub {
  font-size: 1.02rem;
  color: #cbd5f5;
  max-width: 34rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin: 1.6rem 0 1rem;
}

.hero-points {
  list-style: none;
  padding-left: 0;
  margin: 0.5rem 0 0;
  color: #9ca3af;
  font-size: 0.95rem;
}

.hero-points li {
  margin-bottom: 0.25rem;
}

/* Hero card */

.hero-card {
  background: radial-gradient(circle at top, #1f2937, #020617);
  border-radius: var(--radius-lg);
  padding: 1.8rem 1.6rem;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(148, 163, 184, 0.32);
}

.hero-card h2 {
  margin-top: 0;
  margin-bottom: 0.4rem;
}

.hero-card p {
  color: #e5e7eb;
}

.hero-card-list {
  list-style: none;
  padding-left: 0;
  margin: 1rem 0 1.4rem;
  font-size: 0.93rem;
  color: #e5e7eb;
}

.hero-card-list li::before {
  content: "• ";
  color: var(--accent-soft);
}

/* Sections */

.section {
  padding: 3.25rem 0;
}

.section.light {
  background: linear-gradient(to bottom, #f8fafc, #e5e7eb);
  color: var(--text-dark);
}

.section.dark {
  background: radial-gradient(circle at top, #111827, #020617);
  border-top: 1px solid rgba(148, 163, 184, 0.25);
  border-bottom: 1px solid rgba(15, 23, 42, 0.7);
}

.section.dark h2 {
  color: #e5e7eb;
}

.section-intro {
  max-width: 44rem;
  margin-bottom: 2rem;
  color: #6b7280;
}

.section.dark .section-intro {
  color: #cbd5f5;
}

/* Page hero */

.page-hero {
  padding: 3.5rem 0 2.5rem;
  border-bottom: 1px solid rgba(148, 163, 184, 0.4);
  background: radial-gradient(circle at top, #111827, #020617);
}

.page-hero h1 {
  margin-bottom: 0.4rem;
}

.page-hero .section-intro {
  color: #cbd5f5;
}

/* Layout grids */

.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 2rem;
  align-items: flex-start;
}

/* Cards */

.card {
  background: white;
  border-radius: var(--radius-md);
  padding: 1.4rem 1.3rem;
  box-shadow: var(--shadow-light);
  color: var(--text-dark);
}

.section.dark .card {
  background: var(--card-bg);
  color: #e5e7eb;
  border: 1px solid rgba(148, 163, 184, 0.4);
}

.card h3 {
  margin-top: 0;
}

.card-outline {
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: rgba(15, 23, 42, 0.7);
}

.card-highlight {
  border: 1px solid rgba(56, 189, 248, 0.9);
  background: radial-gradient(circle at top, rgba(56, 189, 248, 0.12), rgba(15, 23, 42, 0.95));
  box-shadow: 0 18px 40px rgba(56, 189, 248, 0.4);
}

.price {
  font-weight: 600;
  margin-top: 0.2rem;
  margin-bottom: 0.7rem;
  color: var(--accent-soft);
}

/* Lists */

.list {
  padding-left: 1.1rem;
  margin: 0.4rem 0 0;
}

.list li {
  margin-bottom: 0.35rem;
}

.check-list {
  list-style: none;
  padding-left: 0;
}

.check-list li::before {
  content: "✔ ";
  color: var(--accent);
}

.steps {
  padding-left: 1.2rem;
}

.steps li {
  margin-bottom: 0.4rem;
}

.quotes {
  list-style: none;
  padding-left: 0;
}

.quotes li {
  margin-bottom: 0.8rem;
  font-style: italic;
}

.note {
  font-size: 0.88rem;
  color: #9ca3af;
}

/* Callouts */

.callout {
  background: rgba(15, 23, 42, 0.98);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.4rem;
  border: 1px solid rgba(148, 163, 184, 0.65);
  box-shadow: var(--shadow-soft);
}

/* Portfolio */

.portfolio-card .tag {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.4rem;
  background: rgba(59, 130, 246, 0.12);
  color: #1d4ed8;
}

/* FAQ */

.faq {
  max-width: 820px;
}

.faq-item {
  margin-bottom: 1.6rem;
}

.faq-item h2 {
  margin-bottom: 0.2rem;
}

.faq-item p {
  margin: 0.2rem 0 0;
}

/* Contact form */

.contact-form {
  background: white;
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.4rem;
  box-shadow: var(--shadow-light);
  color: var(--text-dark);
}

.form-group {
  margin-bottom: 0.9rem;
}

label {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
  font-weight: 500;
}

input[type="text"],
input[type="email"],
input[type="tel"],
select,
textarea {
  width: 100%;
  border-radius: 0.75rem;
  border: 1px solid #cbd5e1;
  padding: 0.55rem 0.7rem;
  font-size: 0.93rem;
  font-family: inherit;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.35);
}

.form-note {
  margin-top: 0.7rem;
  font-size: 0.82rem;
  color: #6b7280;
}

/* Footer */

.site-footer {
  background: #020617;
  border-top: 1px solid rgba(148, 163, 184, 0.35);
  margin-top: 2rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 1.7rem 0 0.8rem;
}

.footer-brand {
  margin: 0;
  font-weight: 600;
}

.footer-sub {
  margin: 0.2rem 0 0;
  font-size: 0.86rem;
  color: #9ca3af;
}

.footer-contact p {
  margin: 0;
  font-size: 0.9rem;
}

.footer-contact a {
  color: #e5e7eb;
}

.footer-bottom {
  text-align: center;
  font-size: 0.8rem;
  color: #6b7280;
  padding: 0.8rem 0 1.4rem;
}

/* Utilities */

.placeholder {
  font-style: italic;
  color: #38bdf8;
}

/* Responsive */

@media (max-width: 860px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }
  .two-column {
    grid-template-columns: minmax(0, 1fr);
  }
  .grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }
  .footer-inner {
    flex-direction: column;
    gap: 0.8rem;
  }
}

@media (max-width: 720px) {
  .site-nav {
    position: absolute;
    inset: 100% 0 auto 0;
    background: rgba(5, 8, 22, 0.98);
    flex-direction: column;
    align-items: flex-start;
    padding: 0.75rem 1.5rem 1rem;
    border-bottom: 1px solid rgba(148, 163, 184, 0.4);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.18s ease-out;
  }

  .nav-toggle-label {
    display: block;
  }

  .nav-toggle:checked ~ .nav-toggle-label span {
    background: transparent;
  }
  .nav-toggle:checked ~ .nav-toggle-label span::before {
    top: 0;
    transform: rotate(45deg);
  }
  .nav-toggle:checked ~ .nav-toggle-label span::after {
    top: 0;
    transform: rotate(-45deg);
  }
  .nav-toggle:checked ~ .site-nav {
    max-height: 260px;
  }
}