:root {
  --bg: #edf3fb;
  --panel: rgba(255, 255, 255, 0.92);
  --line: #d4dfef;
  --text: #16304e;
  --muted: #677b96;
  --accent: #1d4f91;
  --accent-2: #3b6eb3;
  --accent-soft: #e7eef8;
  --shadow: 0 18px 48px rgba(24, 48, 78, 0.12);
  --radius: 22px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(59, 110, 179, 0.2), transparent 30%),
    linear-gradient(180deg, #f6f9fd 0%, var(--bg) 100%);
}

.site-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  margin-bottom: 12px;
}

.brand-mark {
  color: var(--text);
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.nav-link {
  text-decoration: none;
  color: var(--text);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 16px;
  font-weight: 700;
}

.nav-link-active {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  color: #fff;
}

.shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px 20px 48px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 380px);
  gap: 28px;
  align-items: center;
  padding: 18px 4px 28px;
}

.hero-build {
  grid-template-columns: 1fr;
  padding-bottom: 16px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 12px;
}

h1,
h2,
h3 {
  margin: 0;
}

h1 {
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.05;
}

.lede {
  max-width: 760px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 22px;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  min-height: 320px;
}

.shot-card {
  position: absolute;
  inset: auto;
  border-radius: 24px;
  background: linear-gradient(160deg, rgba(29, 79, 145, 0.92), rgba(22, 48, 78, 0.9));
  box-shadow: var(--shadow);
}

.shot-top {
  top: 12px;
  right: 0;
  width: 88%;
  padding: 18px;
}

.shot-bottom {
  bottom: 0;
  left: 0;
  width: 72%;
  padding: 22px;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.95), rgba(231, 238, 248, 0.98));
  border: 1px solid rgba(212, 223, 239, 0.9);
}

.shot-bar,
.shot-row,
.shot-pills span,
.shot-grid span {
  display: block;
  border-radius: 999px;
}

.shot-bar {
  width: 42%;
  height: 12px;
  background: rgba(255, 255, 255, 0.75);
  margin-bottom: 24px;
}

.shot-row {
  height: 16px;
  background: rgba(255, 255, 255, 0.18);
  margin-bottom: 14px;
}

.shot-row-wide {
  width: 92%;
  height: 110px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.12);
}

.shot-pills {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.shot-pills span {
  width: 74px;
  height: 34px;
  background: rgba(255, 255, 255, 0.2);
}

.shot-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.shot-grid span {
  height: 62px;
  background: rgba(29, 79, 145, 0.18);
}

.panel {
  background: var(--panel);
  border: 1px solid rgba(212, 223, 239, 0.9);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  margin-bottom: 20px;
}

.panel-head {
  margin-bottom: 18px;
}

.panel-head p {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.55;
}

.overview-grid,
.endpoint-grid,
.gallery-grid,
.bridge-grid,
.example-grid,
.form-grid,
.output-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

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

.span-2 {
  grid-column: 1 / -1;
}

.info-card,
.endpoint-card,
.gallery-card,
.bridge-card,
.example-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
  background: rgba(255, 255, 255, 0.86);
}

.info-card p,
.gallery-card p,
.bridge-card p,
.example-card p {
  color: var(--muted);
  line-height: 1.55;
}

.bridge-note {
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted);
}

.sample-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 12px;
}

.sample-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.72);
}

.sample-card h4 {
  margin: 0 0 8px;
  font-size: 18px;
}

.sample-card p {
  margin: 0 0 12px;
}

.sample-illustration {
  margin-top: 12px;
}

.event-table {
  margin-top: 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}

.event-row {
  display: grid;
  grid-template-columns: 1.1fr 1.2fr 1.6fr;
  gap: 16px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.72);
  border-top: 1px solid var(--line);
}

.event-row:first-child {
  border-top: none;
}

.event-row-head {
  background: var(--accent-soft);
  font-weight: 700;
  color: var(--text);
}

.gallery-shot {
  display: grid;
  place-items: center;
  min-height: 220px;
  margin-bottom: 14px;
  border-radius: 16px;
  border: 1px dashed rgba(29, 79, 145, 0.35);
  background:
    linear-gradient(180deg, rgba(231, 238, 248, 0.8), rgba(255, 255, 255, 0.95)),
    radial-gradient(circle at top left, rgba(59, 110, 179, 0.14), transparent 32%);
  color: var(--accent);
  font: 13px/1.5 "SFMono-Regular", Menlo, monospace;
  text-align: center;
  padding: 16px;
}

.gallery-shot-placeholder {
  font-weight: 700;
}

.info-card ul {
  margin: 14px 0 0;
  padding-left: 18px;
  color: var(--text);
}

.info-card li + li {
  margin-top: 8px;
}

.endpoint-card code {
  display: block;
  margin-top: 12px;
  padding: 14px;
  border-radius: 14px;
  background: #0f1d31;
  color: #dbe8f8;
  overflow-wrap: anywhere;
  font: 13px/1.5 "SFMono-Regular", Menlo, monospace;
}

.flow-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding-left: 24px;
}

.flow-list h3 {
  margin-bottom: 6px;
}

.flow-list p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

label,
fieldset {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

label span,
legend {
  font-size: 14px;
  font-weight: 700;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px;
  background: #fff;
  color: var(--text);
  font: inherit;
}

textarea {
  resize: vertical;
}

fieldset {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px 16px 10px;
}

.advanced-box {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.72);
}

.advanced-box summary {
  cursor: pointer;
  font-size: 14px;
  font-weight: 700;
  list-style: none;
}

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

.advanced-box[open] summary {
  margin-bottom: 12px;
}

.platform-box {
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
  gap: 18px;
  align-items: center;
}

.check {
  flex-direction: row;
  align-items: center;
  gap: 10px;
}

.check input {
  width: 18px;
  height: 18px;
  margin: 0;
}

.actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 999px;
  padding: 14px 20px;
  text-decoration: none;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
}

.btn-secondary {
  background: var(--accent-soft);
  color: var(--text);
}

.code-block {
  margin: 0;
  min-height: 160px;
  border-radius: 16px;
  padding: 0;
  background: #0f1d31;
  color: #dbe8f8;
  overflow: auto;
  font: 13px/1.5 "SFMono-Regular", Menlo, monospace;
}

.code-block code {
  display: block;
  padding: 16px;
  white-space: pre-wrap;
  word-break: break-word;
}

.code-toolbar > .toolbar {
  opacity: 1;
}

.code-toolbar > .toolbar .toolbar-item > button,
.code-toolbar > .toolbar .toolbar-item > span {
  background: rgba(255, 255, 255, 0.12);
  border: none;
  color: #dbe8f8;
  padding: 6px 10px;
  border-radius: 999px;
}

@media (max-width: 980px) {
  .hero,
  .overview-grid,
  .endpoint-grid,
  .bridge-grid,
  .example-grid,
  .form-grid,
  .output-grid {
    grid-template-columns: 1fr;
  }

  .span-2 {
    grid-column: auto;
  }

  .hero-visual {
    min-height: 260px;
  }

  .sample-grid {
    grid-template-columns: 1fr;
  }

  .event-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

@media (max-width: 800px) {
  .site-nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .actions {
    justify-content: stretch;
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .shot-top {
    width: 100%;
  }

  .shot-bottom {
    width: 82%;
  }
}