@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=IBM+Plex+Mono:wght@400;500&display=swap");

:root {
  --bg: #f3f1eb;
  --bg-strong: #fcfbf8;
  --ink: #050505;
  --muted: #262626;
  --soft: #6f6b63;
  --line: rgba(5, 5, 5, 0.2);
  --line-strong: rgba(5, 5, 5, 0.34);
  --panel-dark: #050505;
  --panel-dark-soft: #111111;
  --panel-text: rgba(255, 255, 255, 0.9);
  --mono: "IBM Plex Mono", monospace;
  --body: "Inter", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--body);
  background: var(--bg);
}

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

button,
input,
textarea {
  font: inherit;
}

.page {
  width: min(100%, 1600px);
  margin: 0 auto;
  padding: 18px 20px 64px;
}

.sitebar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 8px 0 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brandmark {
  width: 18px;
  height: 18px;
  display: inline-block;
  border: 2px solid var(--ink);
  border-radius: 3px;
  transform: rotate(45deg);
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: 32px;
  font-size: 14px;
}

.site-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 14px;
}

.hero {
  position: relative;
  padding: 84px 0 126px;
  min-height: 430px;
  overflow: hidden;
}

.hero-field {
  position: absolute;
  inset: -40px -90px 0;
  background:
    radial-gradient(circle at 15% 54%, rgba(0, 0, 0, 0.12) 0 1.1px, transparent 1.2px),
    radial-gradient(circle at 68% 18%, rgba(0, 0, 0, 0.12) 0 1px, transparent 1.1px),
    radial-gradient(circle at 55% 62%, rgba(0, 0, 0, 0.09) 0 1px, transparent 1.1px);
  background-size: 18px 18px, 20px 20px, 22px 22px;
  opacity: 0.58;
  mask-image:
    radial-gradient(110% 78% at 32% 42%, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 0.92) 34%, rgba(0, 0, 0, 0.3) 62%, transparent 76%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.85), rgba(0, 0, 0, 0.1));
  transform: perspective(900px) rotateX(72deg) scale(1.5) translateY(-6%);
  transform-origin: top center;
  pointer-events: none;
}

.eyebrow {
  position: relative;
  z-index: 1;
  margin: 0 0 22px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero h1 {
  position: relative;
  z-index: 1;
  max-width: 9ch;
  margin: 0;
  font-size: clamp(72px, 10vw, 114px);
  line-height: 0.93;
  letter-spacing: -0.06em;
  font-weight: 700;
}

.intro-grid,
.platform-grid,
.console-grid {
  display: grid;
  gap: 18px;
}

.intro-grid {
  grid-template-columns: minmax(180px, 0.58fr) minmax(0, 1fr);
  padding: 8px 0 104px;
}

.section-label {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
}

.intro-copy {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  font-size: clamp(20px, 2vw, 34px);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.intro-copy p {
  max-width: 18ch;
  margin: 0;
}

.station-section,
.platform-section,
.console-section {
  padding-top: 8px;
}

.station-section h2,
.platform-section h2,
.console-head h2 {
  margin: 0 0 26px;
  font-size: clamp(42px, 4vw, 58px);
  line-height: 0.98;
  letter-spacing: -0.05em;
  font-weight: 600;
}

.station-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.station-card {
  min-height: 350px;
  padding: 18px 16px 24px;
  background: var(--panel-dark);
  color: var(--panel-text);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  position: relative;
  overflow: hidden;
}

.station-card::after {
  content: "";
  position: absolute;
  inset: auto 16px 18px 16px;
  height: 132px;
  background:
    linear-gradient(180deg, transparent 0%, rgba(255, 255, 255, 0.04) 100%),
    radial-gradient(circle at center, rgba(255, 255, 255, 0.15) 0 1px, transparent 1.2px);
  background-size: auto, 10px 10px;
  opacity: 0.48;
}

.station-number {
  position: relative;
  z-index: 1;
  margin-bottom: auto;
  font-size: clamp(42px, 4vw, 58px);
  line-height: 1;
  letter-spacing: -0.06em;
}

.station-card h3,
.platform-row h3 {
  margin: 0 0 10px;
  font-size: clamp(28px, 2.2vw, 46px);
  line-height: 0.98;
  letter-spacing: -0.05em;
  font-weight: 500;
}

.station-card p,
.platform-row p,
.response-head p,
.status {
  margin: 0;
  font-size: 16px;
  line-height: 1.4;
}

.station-card p {
  position: relative;
  z-index: 1;
  max-width: 32ch;
  color: rgba(255, 255, 255, 0.72);
}

.platform-section {
  padding-top: 86px;
}

.platform-grid {
  grid-template-columns: minmax(0, 0.72fr) minmax(0, 1fr);
  align-items: start;
}

.platform-visual {
  min-height: 660px;
}

.visual-frame {
  position: sticky;
  top: 24px;
  min-height: 660px;
  padding: 18px;
  background: var(--panel-dark);
  color: var(--panel-text);
}

.visual-label,
.endpoint-chip span,
label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.visual-network {
  position: relative;
  height: 520px;
  margin-top: 20px;
  background:
    radial-gradient(circle at center, rgba(255, 255, 255, 0.18) 0 1px, transparent 1.1px);
  background-size: 12px 12px;
  overflow: hidden;
}

.visual-network::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 58%;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent),
    linear-gradient(0deg, transparent, rgba(255, 255, 255, 0.02));
}

.node,
.line {
  position: absolute;
  display: block;
}

.node {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: #fff;
  box-shadow: 0 0 18px rgba(255, 255, 255, 0.55);
}

.line {
  height: 1px;
  transform-origin: left center;
  background: rgba(255, 255, 255, 0.28);
}

.node-a { top: 88px; left: 116px; }
.node-b { top: 132px; left: 256px; }
.node-c { top: 86px; left: 410px; }
.node-d { top: 162px; left: 528px; }
.node-e { top: 274px; left: 192px; }
.node-f { top: 236px; left: 366px; }
.node-g { top: 354px; left: 298px; }

.line-1 { top: 92px; left: 120px; width: 148px; transform: rotate(16deg); }
.line-2 { top: 136px; left: 262px; width: 160px; transform: rotate(-18deg); }
.line-3 { top: 92px; left: 414px; width: 140px; transform: rotate(34deg); }
.line-4 { top: 168px; left: 258px; width: 120px; transform: rotate(34deg); }
.line-5 { top: 244px; left: 198px; width: 170px; transform: rotate(-12deg); }
.line-6 { top: 242px; left: 372px; width: 160px; transform: rotate(-30deg); }
.line-7 { top: 282px; left: 298px; width: 1px; height: 78px; background: rgba(255, 255, 255, 0.4); }

.visual-footer {
  display: flex;
  justify-content: space-between;
  margin-top: 16px;
  color: rgba(255, 255, 255, 0.72);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.platform-list {
  border-top: 1px solid var(--line-strong);
}

.platform-row {
  display: grid;
  grid-template-columns: 48px minmax(220px, 0.78fr) minmax(0, 1fr);
  gap: 18px;
  padding: 18px 0 26px;
  border-bottom: 1px solid var(--line-strong);
}

.row-number {
  padding-top: 8px;
  font-size: 18px;
  font-weight: 600;
}

.platform-row p {
  max-width: 34ch;
  color: var(--muted);
}

.console-section {
  padding-top: 92px;
}

.console-head {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
  margin-bottom: 26px;
}

.console-grid {
  grid-template-columns: minmax(340px, 0.82fr) minmax(0, 1fr);
  align-items: start;
}

.console-panel,
.response-panel {
  min-height: 640px;
}

.console-panel {
  padding: 18px;
  background: var(--panel-dark);
  color: var(--panel-text);
}

.response-panel {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.56);
}

.response-head {
  padding: 18px 20px 0;
}

.response-head p:last-child {
  max-width: 38ch;
  color: var(--muted);
}

.endpoint-chip {
  min-width: 250px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-strong);
}

.endpoint-chip span {
  display: block;
  margin-bottom: 8px;
  color: var(--soft);
}

.endpoint-chip code {
  font-family: var(--mono);
  font-size: 13px;
}

.field + .field {
  margin-top: 18px;
}

label {
  display: block;
  margin-bottom: 10px;
  color: rgba(255, 255, 255, 0.72);
}

input,
textarea {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 0;
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
}

input {
  padding: 14px 16px;
}

textarea {
  min-height: 430px;
  padding: 16px;
  resize: vertical;
}

input::placeholder,
textarea::placeholder {
  color: rgba(255, 255, 255, 0.34);
}

.actions {
  display: flex;
  gap: 12px;
  margin-top: 18px;
}

button {
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 999px;
  background: transparent;
  color: #fff;
  cursor: pointer;
  transition: background 140ms ease, color 140ms ease, border-color 140ms ease;
}

button:hover {
  background: #fff;
  color: var(--ink);
  border-color: #fff;
}

.status {
  margin-top: 16px;
  color: rgba(255, 255, 255, 0.72);
}

.status.ok {
  color: #77e3b4;
}

.status.error {
  color: #ff9a8e;
}

pre {
  flex: 1;
  margin: 18px 20px 20px;
  padding: 20px;
  overflow: auto;
  border-top: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
}

@media (max-width: 1180px) {
  .sitebar,
  .intro-grid,
  .platform-grid,
  .console-grid,
  .platform-row {
    grid-template-columns: 1fr;
  }

  .site-nav {
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 16px 22px;
  }

  .site-meta {
    justify-content: flex-start;
  }

  .intro-copy,
  .station-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 360px;
    padding-top: 72px;
    padding-bottom: 92px;
  }

  .platform-visual {
    min-height: 420px;
  }

  .visual-frame {
    position: relative;
    min-height: 420px;
  }

  .visual-network {
    height: 320px;
  }

  .console-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .console-panel,
  .response-panel {
    min-height: 0;
  }
}

@media (max-width: 720px) {
  .page {
    padding: 14px 14px 42px;
  }

  .sitebar {
    gap: 14px;
  }

  .hero h1 {
    max-width: 8ch;
    font-size: clamp(56px, 16vw, 80px);
  }

  .intro-grid {
    padding-bottom: 72px;
  }

  .intro-copy {
    font-size: 18px;
    line-height: 1.28;
    letter-spacing: -0.02em;
  }

  .station-card {
    min-height: 280px;
  }

  .platform-section,
  .console-section {
    padding-top: 68px;
  }

  .platform-row {
    gap: 10px;
  }

  textarea {
    min-height: 320px;
  }

  pre {
    margin: 14px;
    padding: 14px;
  }
}