/* CpuPulse landing — single global stylesheet.
   Served from public/ (plain <link>) on purpose: the workspace path D:\@@Projects
   contains "@@", which breaks Vite's CSS emission (@ is a virtual-id prefix). Keeping
   the CSS out of the Vite pipeline sidesteps that entirely. Rules are namespaced by
   section wrapper (.nav, .hero, #what, .how, #cases, .pricing, .cta, .footer). */

:root {
  --bg: #0a0c11;
  --bg-2: #0e121a;
  --card-solid: #121720;
  --border: #212838;
  --border-soft: #1a2130;
  --text: #e8ebf2;
  --muted: #98a2b6;
  --faint: #6b7488;
  --accent: #22d3ee;
  --accent-2: #7c83ff;
  --accent-ink: #04141a;
  --heat-0: #141a24;
  --heat-1: #234b52;
  --heat-2: #b9812a;
  --heat-3: #ef4444;
  --maxw: 1120px;
  --radius: 16px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: -30% 0 auto 0;
  height: 620px;
  background: radial-gradient(60% 60% at 50% 0%, rgba(34, 211, 238, 0.14), transparent 70%),
    radial-gradient(45% 45% at 80% 10%, rgba(124, 131, 255, 0.12), transparent 70%);
  pointer-events: none;
  z-index: -1;
}

h1, h2, h3 {
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0;
  font-weight: 700;
}

p {
  margin: 0;
}

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

img {
  max-width: 100%;
  display: block;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 24px;
}

.section {
  padding-block: 96px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
}

.gradient-text {
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding-inline: 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  color: var(--accent-ink);
  box-shadow: 0 8px 30px rgba(34, 211, 238, 0.25);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 40px rgba(34, 211, 238, 0.35);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.section-head {
  max-width: 640px;
  margin-bottom: 48px;
}

.section-head h2 {
  font-size: clamp(28px, 4vw, 40px);
  margin-top: 14px;
}

.section-head p {
  color: var(--muted);
  font-size: 18px;
  margin-top: 14px;
}

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  border-bottom: 1px solid var(--border-soft);
}

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

.nav .brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.nav .brand b {
  font-weight: 800;
}

.nav .links {
  display: flex;
  gap: 28px;
  font-size: 15px;
}

.nav .links a {
  color: var(--muted);
  transition: color 0.15s ease;
}

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

.nav .nav-cta {
  height: 40px;
  padding-inline: 18px;
  font-size: 14px;
}

@media (max-width: 860px) {
  .nav .links {
    display: none;
  }
}

@media (max-width: 520px) {
  .nav .nav-cta {
    display: none;
  }
}

/* ---------- Hero ---------- */
.hero {
  padding-block: 72px 88px;
}

.hero .grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(38px, 6vw, 62px);
  margin-top: 18px;
}

.hero .lede {
  color: var(--muted);
  font-size: clamp(17px, 2.2vw, 20px);
  margin-top: 22px;
  max-width: 30em;
}

.hero .actions {
  display: flex;
  gap: 14px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.hero .price-note {
  margin-top: 22px;
  font-size: 14px;
  color: var(--faint);
}

.hero .price-note b {
  color: var(--text);
}

.hero .viz {
  background: linear-gradient(180deg, var(--card-solid), #0d1119);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}

.hero .viz-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 14px;
}

.hero .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}

.hero .map {
  display: grid;
  grid-template-columns: 62px repeat(24, 1fr);
  gap: 3px;
}

.hero .corner {
  height: 14px;
}

.hero .hcol {
  font-family: var(--mono);
  font-size: 9px;
  color: var(--faint);
  text-align: center;
}

.hero .rowlabel {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: flex;
  align-items: center;
}

.hero .cell {
  aspect-ratio: 1;
  border-radius: 2px;
}

.hero .legend {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 11px;
  color: var(--faint);
}

.hero .legend i {
  width: 16px;
  height: 10px;
  border-radius: 2px;
}

@media (max-width: 900px) {
  .hero .grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero .viz {
    order: 2;
  }
}

/* ---------- Features (#what) ---------- */
#what .grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

#what .card {
  background: var(--card-solid);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

#what .card:hover {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  transform: translateY(-2px);
}

#what .ic {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  margin-bottom: 18px;
}

#what .card h3 {
  font-size: 19px;
}

#what .card p {
  color: var(--muted);
  margin-top: 10px;
  font-size: 15.5px;
}

@media (max-width: 720px) {
  #what .grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- How it works (.how) ---------- */
.how {
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
  background: var(--bg-2);
}

.how .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.how .step {
  position: relative;
  padding-top: 26px;
  border-top: 2px solid var(--border);
}

.how .step::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 56px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.how .num {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
}

.how .step h3 {
  font-size: 20px;
  margin-top: 10px;
}

.how .step p {
  color: var(--muted);
  margin-top: 10px;
  font-size: 15.5px;
}

@media (max-width: 720px) {
  .how .steps {
    grid-template-columns: 1fr;
  }
}

/* ---------- Use cases (#cases) ---------- */
#cases .grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

#cases .case {
  position: relative;
  background: linear-gradient(180deg, var(--card-solid), #0d1119);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  overflow: hidden;
}

#cases .case::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--accent) 60%, transparent), transparent);
  opacity: 0;
  transition: opacity 0.25s ease;
}

#cases .case:hover::after {
  opacity: 1;
}

#cases .tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 26%, transparent);
  padding: 4px 10px;
  border-radius: 999px;
}

#cases .case h3 {
  font-size: 20px;
  margin-top: 16px;
}

#cases .case p {
  color: var(--muted);
  margin-top: 12px;
  font-size: 15.5px;
}

@media (max-width: 720px) {
  #cases .grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Pricing (.pricing) ---------- */
.pricing {
  background: var(--bg-2);
  border-top: 1px solid var(--border-soft);
}

.pricing .center {
  margin-inline: auto;
  text-align: center;
}

.pricing .card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  max-width: 860px;
  margin-inline: auto;
  background: linear-gradient(180deg, var(--card-solid), #0d1119);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.4);
}

.pricing .amount {
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.pricing .cur {
  font-size: 34px;
  font-weight: 700;
  color: var(--muted);
}

.pricing .amount .num {
  font-size: 76px;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.pricing .per {
  font-size: 13px;
  color: var(--faint);
  line-height: 1.2;
  margin-left: 6px;
}

.pricing .sub {
  color: var(--muted);
  margin: 18px 0 26px;
  font-size: 15px;
}

.pricing .feats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-self: center;
}

.pricing .feats li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15.5px;
  color: var(--text);
}

@media (max-width: 720px) {
  .pricing .card {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 30px;
  }
}

/* ---------- CTA (.cta) ---------- */
.cta {
  padding-block: 110px;
}

.cta .panel {
  position: relative;
  max-width: 720px;
  margin-inline: auto;
  text-align: center;
  background: radial-gradient(120% 120% at 50% 0%, color-mix(in srgb, var(--accent) 10%, transparent), transparent 60%),
    var(--card-solid);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 56px 40px;
}

.cta .panel h2 {
  font-size: clamp(26px, 4vw, 38px);
  margin-top: 14px;
}

.cta .sub {
  color: var(--muted);
  font-size: 17px;
  margin: 16px auto 0;
  max-width: 34em;
}

.cta .form {
  display: flex;
  gap: 10px;
  margin-top: 30px;
  max-width: 480px;
  margin-inline: auto;
}

.cta input {
  flex: 1;
  height: 48px;
  padding-inline: 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s ease;
}

.cta input:focus {
  border-color: var(--accent);
}

.cta .form .btn {
  height: 48px;
  white-space: nowrap;
}

.cta .msg {
  min-height: 20px;
  margin-top: 14px;
  font-size: 14px;
  font-weight: 500;
}

@media (max-width: 520px) {
  .cta .form {
    flex-direction: column;
  }
}

/* ---------- Footer (.footer) ---------- */
.footer {
  border-top: 1px solid var(--border-soft);
  padding-block: 40px;
}

.footer .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer .brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

.footer .brand b {
  font-weight: 800;
}

.footer .note {
  color: var(--faint);
  font-size: 14px;
}

.footer .copy {
  color: var(--faint);
  font-size: 14px;
}

@media (max-width: 620px) {
  .footer .inner {
    justify-content: center;
    text-align: center;
  }
}

@media (max-width: 720px) {
  .section {
    padding-block: 64px;
  }
}

/* ---------- Access gate ---------- */
#gate {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.gate-card {
  width: 100%;
  max-width: 340px;
  background: var(--card-solid);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.gate-brand {
  font-size: 20px;
  font-weight: 600;
}

.gate-brand b {
  font-weight: 800;
}

.gate-note {
  color: var(--muted);
  font-size: 14px;
  margin: 0;
}

#gate input {
  height: 46px;
  padding-inline: 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  outline: none;
}

#gate input:focus {
  border-color: var(--accent);
}

#gate button {
  height: 46px;
  border: none;
  border-radius: 999px;
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  color: var(--accent-ink);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
}

.gate-err {
  min-height: 16px;
  margin: 0;
  color: var(--heat-3);
  font-size: 13px;
}

/* ---------- Nav actions + final CTA ---------- */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-login {
  color: var(--muted);
  font-size: 15px;
  transition: color 0.15s ease;
}

.nav-login:hover {
  color: var(--text);
}

.cta-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 30px;
  flex-wrap: wrap;
}

@media (max-width: 520px) {
  .nav-login {
    display: none;
  }
}