:root {
  --bg: #0b1220;
  --bg-soft: #111827;
  --panel: rgba(17, 24, 39, 0.78);
  --line: rgba(148, 163, 184, 0.22);
  --text: #f8fafc;
  --muted: #94a3b8;
  --brand: #38bdf8;
  --brand-strong: #0ea5e9;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(14,165,233,.22), transparent 55%),
    radial-gradient(1000px 500px at -10% 100%, rgba(56,189,248,.14), transparent 60%),
    var(--bg);
}

a { color: inherit; }

.container {
  width: min(1080px, 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  backdrop-filter: blur(8px);
  background: rgba(11, 18, 32, .75);
  border-bottom: 1px solid var(--line);
}

.nav {
  min-height: 68px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 800;
  letter-spacing: .03em;
}

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, .3);
  background: rgba(15, 23, 42, .7);
  padding: 4px;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.nav-links a {
  text-decoration: none;
  color: var(--muted);
  padding: 8px 10px;
  border-radius: 8px;
  transition: .16s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: #e0f2fe;
  background: rgba(56, 189, 248, .12);
}

.page-gap {
  padding-top: 28px;
  padding-bottom: 26px;
  display: grid;
  gap: 18px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  padding: 18px;
}

.hero {
  padding: 24px;
}

.glow {
  background: linear-gradient(180deg, rgba(56,189,248,.12), rgba(17,24,39,.8));
}

.badge {
  display: inline-flex;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--brand);
  border: 1px solid rgba(56,189,248,.35);
  background: rgba(56,189,248,.14);
  border-radius: 999px;
  padding: 6px 12px;
  margin: 0 0 10px;
}

h1 {
  margin: 6px 0;
  font-size: clamp(28px, 5vw, 42px);
}

h2 { margin: 0 0 10px; }

.lead {
  margin: 0;
  color: #dbeafe;
  max-width: 780px;
  line-height: 1.6;
}

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

.action-row {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  appearance: none;
  text-decoration: none;
  border: 0;
  border-radius: 12px;
  padding: 12px 16px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform .16s ease;
}

.btn:hover { transform: translateY(-1px); }

.btn-primary {
  color: #031525;
  background: linear-gradient(180deg, #67e8f9, #22d3ee);
  border: 1px solid rgba(125, 211, 252, .6);
}

.btn-secondary {
  color: var(--text);
  background: rgba(2, 6, 23, .44);
  border: 1px solid var(--line);
}

.grid { display: grid; gap: 16px; }

.two-col {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.feature-list {
  margin: 0;
  padding-left: 20px;
  color: #dbeafe;
  line-height: 1.7;
}

.meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.kv {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  background: rgba(15, 23, 42, .45);
}

.kv-label {
  margin: 0 0 6px;
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .07em;
}

.kv-value {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
}

.details {
  margin-top: 8px;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}

.details summary {
  list-style: none;
  cursor: pointer;
  padding: 10px 12px;
  font-weight: 700;
  color: #bfdbfe;
}

.details summary::-webkit-details-marker { display: none; }

.details-body {
  padding: 0 12px 12px;
  color: #dbeafe;
  line-height: 1.65;
}

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 8px;
}

.footer-inner {
  min-height: 62px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  color: var(--muted);
  flex-wrap: wrap;
}

.footer-inner a {
  color: #93c5fd;
  text-decoration: none;
}

.footer-inner a:hover { text-decoration: underline; }

.guide-section {
  display: grid;
  gap: 14px;
}

.guide-image {
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(2, 6, 23, .4);
  object-fit: cover;
}

.guide-image-wrap {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 10px;
  background: rgba(15, 23, 42, .45);
}

.guide-caption {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.guide-list {
  margin: 0;
  padding-left: 20px;
  color: #dbeafe;
  line-height: 1.75;
}

.guide-list li + li {
  margin-top: 4px;
}

.guide-subtitle {
  margin: 0;
  color: #bfdbfe;
  font-size: 18px;
}

.guide-note {
  margin: 0;
  color: #dbeafe;
  line-height: 1.65;
}

.guide-divider {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 4px 0;
}

.guide-split {
  display: grid;
  grid-template-columns: minmax(280px, 36%) minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.guide-text-col {
  display: grid;
  gap: 12px;
}

@media (max-width: 900px) {
  .guide-split {
    grid-template-columns: 1fr;
  }
}

.video-wrap {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: rgba(2, 6, 23, .55);
}

.video-wrap iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.callout {
  border: 1px solid rgba(125, 211, 252, .45);
  border-radius: 16px;
  padding: 16px;
  background: linear-gradient(180deg, rgba(34, 211, 238, .14), rgba(15, 23, 42, .6));
  box-shadow: 0 0 0 1px rgba(34, 211, 238, .18) inset;
}

.callout-title {
  margin: 0;
  font-size: 20px;
  color: #e0f2fe;
}

.callout-text {
  margin: 8px 0 0;
  color: #dbeafe;
  line-height: 1.6;
}

.callout-points {
  margin: 10px 0 0;
  padding-left: 20px;
  color: #bae6fd;
  line-height: 1.7;
}

.call-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: #cffafe;
  border: 1px solid rgba(34, 211, 238, .4);
  border-radius: 999px;
  padding: 6px 10px;
  background: rgba(34, 211, 238, .16);
}

.countdown {
  border: 1px solid rgba(103, 232, 249, .45);
  border-radius: 16px;
  padding: 18px;
  background: linear-gradient(180deg, rgba(103,232,249,.16), rgba(15,23,42,.58));
}

.countdown-title {
  margin: 0;
  color: #e0f2fe;
  font-size: 22px;
}

.countdown-grid {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(4, minmax(90px, 1fr));
  gap: 10px;
}

.countdown-box {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  text-align: center;
  background: rgba(2, 6, 23, .45);
}

.countdown-value {
  margin: 0;
  font-size: clamp(22px, 5vw, 32px);
  font-weight: 900;
  color: #67e8f9;
}

.countdown-label {
  margin: 4px 0 0;
  color: #93c5fd;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .06em;
}

.countdown-note {
  margin-top: 10px;
  color: #dbeafe;
}

@media (max-width: 700px) {
  .countdown-grid {
    grid-template-columns: repeat(2, minmax(120px, 1fr));
  }
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
}

.plan-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(15, 23, 42, .48);
  padding: 14px;
}

.plan-name {
  margin: 0;
  font-size: 20px;
  color: #e0f2fe;
}

.plan-price {
  margin: 8px 0 10px;
  font-size: 30px;
  font-weight: 900;
  color: #67e8f9;
}

.plan-price small {
  font-size: 14px;
  color: #bfdbfe;
}

.plan-list {
  margin: 0;
  padding-left: 18px;
  color: #dbeafe;
  line-height: 1.7;
}

.cart-box {
  border: 1px solid rgba(103, 232, 249, .4);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(56,189,248,.12), rgba(15,23,42,.6));
  padding: 16px;
}

.cart-controls {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  margin-top: 10px;
}

.field {
  display: grid;
  gap: 6px;
}

.field label {
  color: #bfdbfe;
  font-size: 13px;
}

.field select,
.field input {
  background: #0b1220;
  border: 1px solid #334155;
  border-radius: 10px;
  color: #f8fafc;
  padding: 9px 10px;
}

.cart-total {
  margin-top: 12px;
  font-size: 22px;
  font-weight: 900;
  color: #67e8f9;
}

.cart-head {
  display: flex;
  align-items: center;
  gap: 10px;
}

.cart-logo {
  width: 42px;
  height: 42px;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid rgba(103, 232, 249, .35);
  background: rgba(2, 6, 23, .5);
}

.brand-showcase {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 10px;
  background: rgba(15, 23, 42, .45);
  aspect-ratio: 1600 / 511;
}

.brand-showcase img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid rgba(103, 232, 249, .25);
}