:root {
  --gradient-start: #091a4b;
  --gradient-mid: #0f1635;
  --gradient-end: #010207;
  --accent: #3fd5ff;
  --accent-strong: #7cf7ff;
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.76);
  --surface: rgba(10, 18, 40, 0.78);
  --surface-muted: rgba(10, 18, 40, 0.58);
  --border: rgba(255, 255, 255, 0.12);
  --shadow: 0 24px 60px rgba(8, 12, 29, 0.45);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --max-width: min(980px, 92vw);
}

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

body {
  margin: 0;
  font-family: "Poppins", "Segoe UI", sans-serif;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-mid) 45%, var(--gradient-end));
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  scroll-behavior: smooth;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 20% 20%, rgba(63, 213, 255, 0.12), transparent 55%),
    radial-gradient(circle at 80% 0%, rgba(124, 247, 255, 0.16), transparent 45%);
  pointer-events: none;
  z-index: 0;
}

main {
  position: relative;
  z-index: 1;
  flex: 1 0 auto;
  display: flex;
  flex-direction: column;
  gap: 52px;
  padding-bottom: 96px;
}

header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: linear-gradient(135deg, rgba(9, 26, 75, 0.92), rgba(1, 2, 7, 0.92));
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.topbar {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: clamp(0.75rem, 1.6vw, 1.4rem) 0;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  text-decoration: none;
  color: inherit;
}

.brand img {
  width: 128px;
  height: auto;
}

.brand span {
  display: inline-flex;
  flex-direction: column;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.primary-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--accent), var(--accent-strong));
  color: #010207;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 12px 32px rgba(63, 213, 255, 0.24);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.primary-cta:hover,
.primary-cta:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 18px 42px rgba(63, 213, 255, 0.36);
}

.nav-first {
  padding-top: clamp(2rem, 6vw, 3.5rem);
  display: flex;
  justify-content: center;
}

.nav-shell {
  width: 100%;
  max-width: var(--max-width);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: clamp(2rem, 4vw, 3rem);
  display: grid;
  gap: clamp(1.4rem, 3vw, 2rem);
}

.nav-shell h1 {
  margin: 0;
  font-size: clamp(1.9rem, 5vw, 2.8rem);
  line-height: 1.1;
}

.nav-shell p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.6;
}

.nav-grid {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 16px;
}

.nav-card {
  position: relative;
  background: var(--surface-muted);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 18px;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.nav-card strong {
  font-size: 1rem;
}

.nav-card span {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
}

.nav-card:hover,
.nav-card:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(124, 247, 255, 0.5);
  background: rgba(14, 27, 60, 0.82);
}

.hero {
  display: flex;
  justify-content: center;
}

.hero-card {
  width: 100%;
  max-width: var(--max-width);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 4vw, 3rem);
  box-shadow: var(--shadow);
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.2rem);
}

.hero-card h2 {
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  line-height: 1.15;
  margin: 0;
}

.hero-card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

.hero-actions a.secondary {
  color: var(--accent-strong);
  text-decoration: none;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
}

.hero-actions a.secondary::after {
  content: "→";
  margin-left: 8px;
  transition: transform 0.3s ease;
}

.hero-actions a.secondary:hover::after,
.hero-actions a.secondary:focus-visible::after {
  transform: translateX(4px);
}

section.sectioned {
  display: flex;
  justify-content: center;
}

.section-shell {
  max-width: var(--max-width);
  margin: 0 auto;
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: clamp(2rem, 4vw, 3rem);
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.3rem);
}

.section-shell h3 {
  margin: 0;
  font-size: clamp(1.6rem, 4vw, 2.2rem);
}

.section-shell p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.7;
}

.feature-list {
  display: grid;
  gap: 18px;
}

.feature-item {
  display: grid;
  gap: 6px;
  padding: 18px;
  border-radius: var(--radius-sm);
  background: rgba(15, 23, 54, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.feature-item strong {
  font-size: 1rem;
}

.feature-item span {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.support-tile {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 20px;
  border-radius: var(--radius-md);
  background: rgba(15, 23, 54, 0.74);
  border: 1px solid rgba(124, 247, 255, 0.18);
}

.support-tile a {
  align-self: flex-start;
  text-decoration: none;
  color: #010207;
  background: linear-gradient(120deg, var(--accent), var(--accent-strong));
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 600;
  box-shadow: 0 12px 28px rgba(63, 213, 255, 0.3);
}

.cta-footer {
  max-width: var(--max-width);
  margin: -12px auto 0;
  background: linear-gradient(120deg, rgba(63, 213, 255, 0.16), rgba(124, 247, 255, 0.08));
  border: 1px solid rgba(124, 247, 255, 0.32);
  border-radius: var(--radius-lg);
  padding: clamp(1.8rem, 4vw, 2.6rem);
  text-align: center;
  display: grid;
  gap: 14px;
}

.cta-footer h3 {
  margin: 0;
  font-size: clamp(1.6rem, 3.6vw, 2rem);
}

.cta-footer p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.6;
}

footer {
  position: relative;
  z-index: 1;
  padding: 32px 0 48px;
}

.footer-shell {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
  text-align: center;
  color: rgba(255, 255, 255, 0.64);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--accent-strong);
  text-decoration: none;
  font-weight: 500;
}

/* Page layouts */

body.page main {
  gap: 40px;
}

.page-hero,
.page-section {
  display: flex;
  justify-content: center;
}

.page-shell {
  width: 100%;
  max-width: var(--max-width);
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: clamp(2rem, 4vw, 3rem);
  display: grid;
  gap: clamp(1.2rem, 3vw, 2.1rem);
}

.page-hero .page-shell {
  text-align: left;
}

.page-hero h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 2.8rem);
  line-height: 1.1;
}

.page-hero p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.7;
}

.page-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.page-actions a.secondary {
  color: var(--accent-strong);
  text-decoration: none;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
}

.page-actions a.secondary::after {
  content: "→";
  margin-left: 8px;
  transition: transform 0.3s ease;
}

.page-actions a.secondary:hover::after,
.page-actions a.secondary:focus-visible::after {
  transform: translateX(4px);
}

.breadcrumbs {
  display: inline-flex;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  align-items: center;
}

.breadcrumbs a {
  color: var(--accent-strong);
  text-decoration: none;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
}

.feature-card {
  background: rgba(15, 23, 54, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 18px;
  display: grid;
  gap: 10px;
}

.feature-card strong {
  font-size: 1.05rem;
}

.feature-card p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.6;
}

.step-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding-left: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.resource-grid {
  display: grid;
  gap: 14px;
}

.resource-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  background: rgba(15, 23, 54, 0.62);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
}

.resource-item strong {
  color: var(--text-primary);
}

.resource-item a {
  color: var(--accent-strong);
  text-decoration: none;
  font-weight: 500;
}

.notice {
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(124, 247, 255, 0.24);
  background: rgba(10, 30, 60, 0.68);
  color: var(--text-secondary);
  line-height: 1.6;
}

@media (max-width: 720px) {
  .brand img {
    width: 110px;
  }

  .primary-cta {
    font-size: 0.95rem;
    padding: 10px 16px;
  }

  .nav-shell,
  .hero-card,
  .section-shell,
  .page-shell {
    padding: clamp(1.6rem, 5vw, 2.2rem);
  }

  .hero-actions,
  .page-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .nav-grid {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  }
}

@media (max-width: 540px) {
  .primary-cta,
  .support-tile a {
    justify-content: center;
    width: 100%;
  }

  .nav-card {
    padding: 16px;
  }

  .topbar {
    flex-wrap: wrap;
    justify-content: center;
  }

  .brand span {
    text-align: center;
  }
}