@import url('https://fonts.googleapis.com/css2?family=Inter:ital,wght@0,400;0,500;0,600;0,700;1,400&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Design tokens ─────────────────────────────────────────────── */
:root {
  --bg:             #0c0c0c;
  --surface:        #111111;
  --surface-2:      #161616;
  --border:         #1f1f1f;
  --border-2:       #2a2a2a;
  --text:           #ededed;
  --text-2:         #888888;
  --text-3:         #444444;
  --accent:         #00ff88;
  --accent-dim:     rgba(0, 255, 136, 0.07);
  --accent-mid:     rgba(0, 255, 136, 0.14);
  --accent-border:  rgba(0, 255, 136, 0.22);
  --red:            #ff5555;
  --yellow:         #ffcc44;
  --blue:           #5b9af5;

  --radius-sm: 4px;
  --radius:    6px;
  --radius-lg: 10px;

  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', ui-monospace, monospace;

  --nav-h:   56px;
  --max-w:   1100px;
  --text-w:  640px;
}

/* ── Reset ──────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html  { scroll-behavior: smooth; }
body  {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a           { color: inherit; text-decoration: none; }
img         { display: block; max-width: 100%; }
ul          { list-style: none; }
button      { cursor: pointer; font-family: var(--font); }
input, textarea, select { font-family: var(--font); }

/* ── Typography ─────────────────────────────────────────────────── */
h1 {
  font-size: clamp(40px, 5.5vw, 68px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.06;
  color: var(--text);
}
h2 {
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--text);
}
h3 { font-size: 18px; font-weight: 600; letter-spacing: -0.02em; color: var(--text); }
h4 {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
}
p  { color: var(--text-2); line-height: 1.7; }

/* ── Layout ─────────────────────────────────────────────────────── */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 28px; }

.section { padding: 100px 0; }
.section + .section { border-top: 1px solid var(--border); }

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  border-radius: 100px;
  padding: 4px 12px;
  margin-bottom: 24px;
}

.section-title  { margin-bottom: 14px; }
.section-sub    {
  font-size: 17px;
  color: var(--text-2);
  max-width: 540px;
  line-height: 1.7;
  margin-bottom: 56px;
}

/* ── Nav ────────────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: rgba(12, 12, 12, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 28px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
  white-space: nowrap;
  margin-right: 16px;
}
.nav-logo .logo-icon { color: var(--accent); }

.nav-link {
  font-size: 13.5px;
  color: var(--text-2);
  padding: 6px 11px;
  border-radius: var(--radius);
  transition: color 0.15s;
  white-space: nowrap;
}
.nav-link:hover  { color: var(--text); }
.nav-link.active { color: var(--text); }

.nav-right {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.nav-divider {
  width: 1px;
  height: 18px;
  background: var(--border-2);
  margin: 0 8px;
}

/* ── Buttons ────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  border: none;
  transition: opacity 0.15s, transform 0.1s;
  white-space: nowrap;
  line-height: 1;
  cursor: pointer;
}
.btn:hover  { opacity: 0.82; }
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.38; cursor: not-allowed; }

.btn-primary  { background: var(--accent); color: #000; font-weight: 600; }
.btn-secondary {
  background: var(--surface);
  color: var(--text-2);
  border: 1px solid var(--border-2);
}
.btn-secondary:hover { color: var(--text); }

.btn-ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent-border);
}
.btn-ghost:hover { background: var(--accent-dim); }

.btn-danger {
  background: transparent;
  color: var(--red);
  border: 1px solid rgba(255, 85, 85, 0.25);
}
.btn-danger:hover { background: rgba(255, 85, 85, 0.08); }

.btn-sm { padding: 5px 12px; font-size: 12px; }
.btn-lg { padding: 11px 22px; font-size: 15px; font-weight: 600; }

/* ── Code blocks ────────────────────────────────────────────────── */
.code-block {
  background: #090909;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.8;
}

.code-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  user-select: none;
}

.code-dots { display: flex; gap: 6px; }
.code-dot  { width: 10px; height: 10px; border-radius: 50%; }
.code-dot:nth-child(1) { background: #ff5f57; }
.code-dot:nth-child(2) { background: #febc2e; }
.code-dot:nth-child(3) { background: #28c840; }

.code-filename {
  font-size: 12px;
  color: var(--text-3);
  margin-left: 6px;
}

.code-copy {
  margin-left: auto;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-3);
  font-size: 11px;
  font-family: var(--font);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  transition: color 0.15s, border-color 0.15s;
}
.code-copy:hover { color: var(--text-2); border-color: var(--border-2); }
.code-copy.copied { color: var(--accent); border-color: var(--accent-border); }

.code-body {
  padding: 20px 24px;
  overflow-x: auto;
}
.code-body pre { margin: 0; white-space: pre; }

/* ── Syntax tokens ──────────────────────────────────────────────── */
.tk-cm  { color: var(--text-3); font-style: italic; }
.tk-kw  { color: var(--text-2); }
.tk-fn  { color: var(--text); }
.tk-str { color: #88c0d0; }
.tk-num { color: #b48ead; }
.tk-acc { color: var(--accent); font-weight: 500; }
.tk-obj { color: var(--text); }
.tk-pn  { color: var(--text-3); }
.tk-key { color: #d4a7e3; }

/* ── Badges ─────────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 100px;
  border: 1px solid var(--border-2);
  color: var(--text-2);
}
.badge-accent  { color: var(--accent); background: var(--accent-dim); border-color: var(--accent-border); }
.badge-neutral { color: var(--text-2); background: var(--surface); border-color: var(--border); }

/* ── HTTP method badges ─────────────────────────────────────────── */
.http {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
}
.http-post   { background: rgba(91,154,245,.15); color: #5b9af5; }
.http-get    { background: rgba(74,222,128,.12); color: #4ade80; }
.http-delete { background: rgba(248,113,113,.12); color: #f87171; }

/* ── Cards ──────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color 0.2s;
}
.card:hover { border-color: var(--border-2); }

.card-method {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 14px;
  display: block;
}
.card-title { font-size: 15px; font-weight: 600; margin-bottom: 8px; color: var(--text); }
.card-desc  { font-size: 14px; color: var(--text-2); line-height: 1.65; }

/* ── Cards grid (borderless inner walls) ────────────────────────── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.cards-grid > .card {
  border: none;
  border-radius: 0;
  background: var(--surface);
}
.cards-grid > .card:hover { background: var(--surface-2); }

/* Flagship card spanning full row */
.card-flagship {
  grid-column: 1 / -1;
  background: var(--surface-2);
  border: none;
  border-top: 1px solid var(--border);
  border-radius: 0;
  padding: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.card-flagship:hover { background: var(--surface-2); }

/* ── Diagram ────────────────────────────────────────────────────── */
.diagram { display: flex; flex-direction: column; gap: 20px; }

.diagram-layer {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.diagram-layer-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.diagram-row {
  display: flex;
  align-items: center;
}

.diagram-box {
  flex: 1;
  border: 1px solid var(--border-2);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 14px 16px;
  min-width: 0;
}
.diagram-box.highlight {
  border-color: var(--accent-border);
  background: var(--accent-dim);
}

.diagram-box-num {
  font-size: 10px;
  font-weight: 700;
  color: var(--text-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 4px;
}
.diagram-box.highlight .diagram-box-num { color: var(--accent); }

.diagram-box-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.diagram-box-lines {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.diagram-box-line {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-3);
}
.diagram-box-line.acc { color: var(--accent); }

.diagram-arrow {
  flex-shrink: 0;
  width: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-3);
  font-size: 14px;
}

.diagram-sep {
  height: 1px;
  background: var(--border);
  margin: 4px 0;
}

/* ── Feature split ──────────────────────────────────────────────── */
.feature-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: start;
}

.feature-points {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}
.feature-point {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.6;
}
.feature-point-dot {
  flex-shrink: 0;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 8px;
}

/* ── Forms ──────────────────────────────────────────────────────── */
.form-group   { display: flex; flex-direction: column; gap: 6px; margin-bottom: 18px; }
.form-label   { font-size: 12px; font-weight: 500; color: var(--text-2); }
.form-input {
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  padding: 10px 14px;
  outline: none;
  transition: border-color 0.15s;
  width: 100%;
}
.form-input:focus       { border-color: var(--accent); }
.form-input::placeholder { color: var(--text-3); }
.form-error { font-size: 12px; color: var(--red); margin-top: 4px; }
.form-hint  { font-size: 12px; color: var(--text-3); margin-top: 4px; }

/* ── Auth pages ─────────────────────────────────────────────────── */
.auth-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 24px;
}
.auth-box     { width: 100%; max-width: 400px; }
.auth-logo    { display: flex; align-items: center; gap: 8px; font-size: 15px; font-weight: 700; margin-bottom: 44px; }
.auth-logo .logo-icon { color: var(--accent); }
.auth-title   { font-size: 24px; font-weight: 700; letter-spacing: -0.025em; margin-bottom: 6px; }
.auth-sub     { font-size: 14px; color: var(--text-2); margin-bottom: 32px; }

.auth-divider {
  display: flex; align-items: center; gap: 12px;
  margin: 24px 0; font-size: 12px; color: var(--text-3);
}
.auth-divider::before, .auth-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}
.auth-footer  { font-size: 14px; color: var(--text-2); margin-top: 24px; text-align: center; }
.auth-footer a { color: var(--accent); transition: opacity 0.15s; }
.auth-footer a:hover { opacity: 0.75; }

/* ── Dashboard ──────────────────────────────────────────────────── */
.app-wrap {
  padding-top: var(--nav-h);
  min-height: 100vh;
}

.page-header {
  padding: 48px 0 40px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 48px;
}
.page-header h1 { font-size: 28px; letter-spacing: -0.025em; margin-bottom: 4px; }
.page-header p  { font-size: 14px; }

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 24px;
}
.panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.panel-title { font-size: 14px; font-weight: 600; }
.panel-body  { padding: 20px; }

.keys-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.keys-table th {
  text-align: left;
  padding: 10px 16px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.keys-table td {
  padding: 14px 16px;
  color: var(--text-2);
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.keys-table tr:last-child td { border-bottom: none; }
.keys-table td:first-child   { font-family: var(--mono); color: var(--text); font-size: 12px; }

.status-pill {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11px; font-weight: 600;
  padding: 2px 8px; border-radius: 100px;
}
.status-pill.active  { color: var(--accent); background: var(--accent-dim); }
.status-pill.revoked { color: var(--text-3); background: var(--surface-2); }
.status-pill::before { content: ''; width: 5px; height: 5px; border-radius: 50%; background: currentColor; }

/* ── New-key modal ──────────────────────────────────────────────── */
.modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
}
.modal-box {
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  padding: 32px;
  width: 100%;
  max-width: 440px;
}
.modal-title  { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.modal-sub    { font-size: 14px; color: var(--text-2); margin-bottom: 28px; }
.modal-footer { display: flex; gap: 10px; justify-content: flex-end; margin-top: 24px; }

.key-reveal {
  display: flex; align-items: center; gap: 8px;
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  word-break: break-all;
  margin-bottom: 10px;
}
.key-note {
  font-size: 12px; color: var(--text-3);
  display: flex; align-items: center; gap: 6px;
}
.key-note::before { content: '⚠'; color: var(--yellow); }

/* ── Reference page ─────────────────────────────────────────────── */
.reference-wrap {
  padding-top: var(--nav-h);
  display: grid;
  grid-template-columns: 256px 1fr;
  min-height: 100vh;
}

.ref-sidebar {
  position: sticky;
  top: var(--nav-h);
  height: calc(100vh - var(--nav-h));
  overflow-y: auto;
  border-right: 1px solid var(--border);
  padding: 28px 0;
}

.ref-sidebar-section  { margin-bottom: 4px; }
.ref-sidebar-label    {
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-3); padding: 10px 24px 6px;
  display: block;
}

.ref-sidebar-link {
  display: flex; align-items: center; gap: 10px;
  padding: 7px 24px;
  font-size: 13px; color: var(--text-2);
  transition: color 0.12s, background 0.12s;
}
.ref-sidebar-link:hover  { color: var(--text); background: var(--surface); }
.ref-sidebar-link.active { color: var(--accent); background: var(--accent-dim); }

.ref-sidebar-featured {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 24px;
  font-size: 13px; font-weight: 500; color: var(--text);
  transition: background 0.12s;
}
.ref-sidebar-featured:hover { background: var(--surface); }
.ref-sidebar-featured .star { color: var(--accent); font-size: 10px; }

.ref-content {
  padding: 56px 64px;
  max-width: 860px;
}
.ref-content h1 { font-size: 32px; margin-bottom: 12px; }

.endpoint-block {
  padding: 52px 0;
  border-bottom: 1px solid var(--border);
  scroll-margin-top: calc(var(--nav-h) + 24px);
}
.endpoint-block:last-child { border-bottom: none; }

.endpoint-path-row {
  display: flex; align-items: center; gap: 12px; margin-bottom: 14px;
}
.endpoint-path {
  font-family: var(--mono); font-size: 15px; color: var(--text);
}
.endpoint-desc {
  font-size: 15px; color: var(--text-2);
  line-height: 1.7; margin-bottom: 32px;
  max-width: 640px;
}

.params-label {
  font-size: 12px; font-weight: 600; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--text-3);
  margin-bottom: 12px;
}

.params-table {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  border-collapse: collapse;
  margin-bottom: 28px;
  font-size: 13px;
}
.params-table th {
  text-align: left; padding: 9px 14px;
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--text-3); background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.params-table td {
  padding: 11px 14px; color: var(--text-2);
  border-bottom: 1px solid var(--border);
  vertical-align: top; line-height: 1.55;
}
.params-table tr:last-child td { border-bottom: none; }
.params-table td:nth-child(1)  { font-family: var(--mono); color: var(--text); font-size: 12px; white-space: nowrap; }
.params-table td:nth-child(2)  { font-family: var(--mono); color: #b48ead; font-size: 12px; white-space: nowrap; }

.required { color: var(--red); font-size: 10px; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; margin-left: 5px; }
.optional { color: var(--text-3); font-size: 10px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; margin-left: 5px; }

.example-wrap { display: flex; flex-direction: column; gap: 6px; }
.example-tabs { display: flex; gap: 2px; margin-bottom: 0; }
.example-tab  {
  padding: 7px 14px; font-size: 12px; font-weight: 500;
  color: var(--text-3); border: none; background: none;
  border-bottom: 2px solid transparent; cursor: pointer;
  transition: color 0.12s;
}
.example-tab.active { color: var(--text); border-color: var(--accent); }
.example-tab:hover  { color: var(--text-2); }

/* ── Playground ─────────────────────────────────────────────────── */
.playground-wrap {
  padding-top: var(--nav-h);
  height: calc(100vh - var(--nav-h));
  display: grid;
  grid-template-columns: 220px 1fr 1fr;
  overflow: hidden;
}

/* ── Hero ───────────────────────────────────────────────────────── */
.hero {
  padding-top: calc(var(--nav-h) + 88px);
  padding-bottom: 88px;
  text-align: center;
}
.hero-inner       { max-width: var(--text-w); margin: 0 auto; }
.hero-tag         { margin-bottom: 28px; }
.hero h1          { margin-bottom: 22px; }
.hero-sub         { font-size: 18px; color: var(--text-2); max-width: 480px; margin: 0 auto 40px; line-height: 1.7; }
.hero-ctas        { display: flex; align-items: center; justify-content: center; gap: 12px; margin-bottom: 60px; flex-wrap: wrap; }

/* ── Footer ─────────────────────────────────────────────────────── */
.footer { border-top: 1px solid var(--border); padding: 56px 0; }
.footer-inner {
  max-width: var(--max-w); margin: 0 auto; padding: 0 28px;
  display: grid; grid-template-columns: 1.8fr 1fr 1fr; gap: 48px;
}
.footer-brand .nav-logo { margin-bottom: 10px; }
.footer-brand p         { font-size: 13px; color: var(--text-3); line-height: 1.65; max-width: 240px; }
.footer-col-label       { font-size: 11px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3); margin-bottom: 16px; }
.footer-links           { display: flex; flex-direction: column; gap: 10px; }
.footer-link            { font-size: 14px; color: var(--text-2); transition: color 0.15s; }
.footer-link:hover      { color: var(--text); }

/* ── Spinner ────────────────────────────────────────────────────── */
.spinner {
  display: inline-block;
  width: 14px; height: 14px;
  border: 2px solid var(--border-2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Scrollbars ─────────────────────────────────────────────────── */
::-webkit-scrollbar       { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }

/* ── Utility classes ────────────────────────────────────────────── */
.text-accent  { color: var(--accent); }
.text-muted   { color: var(--text-2); }
.text-dimmed  { color: var(--text-3); }
.mono         { font-family: var(--mono); }
.hidden       { display: none !important; }
.flex         { display: flex; }
.flex-center  { display: flex; align-items: center; justify-content: center; }
.items-center { align-items: center; }
.gap-8        { gap: 8px; }
.gap-12       { gap: 12px; }
.gap-16       { gap: 16px; }
.mt-8         { margin-top: 8px; }
.mt-16        { margin-top: 16px; }
.mt-24        { margin-top: 24px; }
.mt-32        { margin-top: 32px; }
.mb-8         { margin-bottom: 8px; }
.mb-16        { margin-bottom: 16px; }
.mb-24        { margin-bottom: 24px; }
.mb-32        { margin-bottom: 32px; }
.w-full       { width: 100%; }
.text-center  { text-align: center; }
.text-right   { text-align: right; }

/* ── Playground ─────────────────────────────────────────────────── */
.pg-auth-bar {
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  z-index: 90;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  height: 48px;
}
.pg-auth-inner {
  height: 100%;
  max-width: 100%;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.pg-auth-label {
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--text-3); white-space: nowrap;
}
.pg-auth-input {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text); font-family: var(--mono);
  font-size: 12px; padding: 6px 10px;
  outline: none; width: 240px;
  transition: border-color 0.15s;
}
.pg-auth-input:focus { border-color: var(--accent); }
.pg-auth-input::placeholder { color: var(--text-3); }
.pg-key-status { font-size: 12px; color: var(--accent); }

.pg-wrap {
  position: fixed;
  top: calc(var(--nav-h) + 48px);
  bottom: 0; left: 0; right: 0;
  display: grid;
  grid-template-columns: 200px 1fr 1fr;
  overflow: hidden;
}

/* Sidebar */
.pg-sidebar {
  overflow-y: auto;
  border-right: 1px solid var(--border);
  padding: 16px 0;
  background: var(--surface);
}
.pg-sidebar-section { margin-bottom: 4px; }
.pg-sidebar-label {
  font-size: 10px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-3); padding: 10px 16px 4px;
  display: block;
}
.pg-ep-btn {
  display: block; width: 100%;
  text-align: left;
  padding: 7px 16px;
  font-size: 13px; color: var(--text-2);
  background: none; border: none; cursor: pointer;
  transition: color 0.12s, background 0.12s;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.pg-ep-btn:hover  { color: var(--text); background: rgba(255,255,255,0.04); }
.pg-ep-btn.active { color: var(--accent); background: var(--accent-dim); }

/* Center panel */
.pg-center {
  padding: 24px 28px;
  overflow-y: auto;
  border-right: 1px solid var(--border);
}
.pg-endpoint-row {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 12px;
}
.pg-path {
  font-family: var(--mono); font-size: 14px; color: var(--text);
  flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.pg-desc {
  font-size: 13px; color: var(--text-2);
  line-height: 1.6; margin-bottom: 24px;
}
.pg-field-group {
  display: flex; flex-direction: column; gap: 5px;
  margin-bottom: 16px;
}
.pg-field-label {
  font-size: 12px; font-weight: 500; color: var(--text-2);
}
.pg-field-input {
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: var(--radius);
  color: var(--text); font-size: 13px;
  padding: 8px 12px; outline: none;
  transition: border-color 0.15s; width: 100%;
}
.pg-field-input:focus { border-color: var(--accent); }
.pg-field-input::placeholder { color: var(--text-3); }
.pg-field-textarea {
  resize: vertical;
  min-height: 72px;
  font-family: var(--mono);
  font-size: 12px;
}
.pg-field-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23666'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 28px;
  cursor: pointer;
}
.pg-field-select option { background: var(--surface-2); }

/* Response panel */
.pg-response {
  display: flex; flex-direction: column;
  overflow: hidden;
}
.pg-response-header {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  flex-shrink: 0;
}
.pg-response-label {
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-3);
}
.pg-status {
  font-family: var(--mono); font-size: 11px;
  font-weight: 700; padding: 2px 7px;
  border-radius: 4px;
}
.pg-status.ok  { color: var(--accent); background: var(--accent-dim); }
.pg-status.err { color: var(--red);    background: rgba(255,83,83,0.12); }
.pg-latency {
  font-size: 11px; color: var(--text-3);
  font-family: var(--mono);
}
.pg-response-body {
  flex: 1; overflow-y: auto;
  padding: 20px;
  font-family: var(--mono);
  font-size: 12px; color: var(--text-2);
  line-height: 1.65;
  white-space: pre-wrap; word-break: break-all;
}
.pg-response-body pre { margin: 0; white-space: pre; word-break: normal; overflow-x: auto; }
.pg-placeholder { color: var(--text-3); font-style: italic; }

/* ── Responsive ─────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .feature-split { grid-template-columns: 1fr; gap: 36px; }
  .card-flagship { grid-template-columns: 1fr; gap: 24px; }
  .footer-inner  { grid-template-columns: 1fr 1fr; }
  .cards-grid    { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-link      { display: none; }
  .nav-divider   { display: none; }
  .cards-grid    { grid-template-columns: 1fr; }
  .footer-inner  { grid-template-columns: 1fr; gap: 32px; }
  .reference-wrap { grid-template-columns: 1fr; }
  .ref-sidebar   { display: none; }
  .ref-content   { padding: 32px 20px; }
  .playground-wrap { grid-template-columns: 1fr; height: auto; }
  .pg-wrap {
    position: static;
    grid-template-columns: 1fr;
    height: auto;
    overflow: visible;
  }
  .pg-sidebar { max-height: 220px; }
  .pg-response { min-height: 320px; }
  .section       { padding: 72px 0; }
  h1             { font-size: 36px; }
  .hero-sub      { font-size: 16px; }
}

@media (max-width: 480px) {
  .hero-ctas     { flex-direction: column; align-items: stretch; }
  .btn-lg        { justify-content: center; }
  .hero          { padding-top: calc(var(--nav-h) + 56px); }
  .ref-content   { padding: 24px 16px; }
  .diagram-row   { flex-direction: column; gap: 8px; }
  .diagram-arrow { transform: rotate(90deg); }
}