:root {
  --sidebar-width: 264px;
  --primary: #1677ff;
  --primary-light: #e6f4ff;
  --text: #1a1a2e;
  --text-secondary: #595959;
  --bg: #f5f7fa;
  --sidebar-bg: #ffffff;
  --border: #e8e8e8;
  --active-bg: #e6f4ff;
  --hover-bg: #f5f5f5;
  --content-max: 860px;
  --code-bg: #f5f5f5;
  --radius: 6px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
}

/* ── Sidebar ── */
.sidebar {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  z-index: 100;
  display: flex;
  flex-direction: column;
}

.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.sidebar-logo {
  padding: 20px 20px 18px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-logo .logo-name {
  font-size: 19px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
}

.sidebar-logo .logo-sub {
  font-size: 11.5px;
  color: var(--text-secondary);
  margin-top: 1px;
}

nav { padding: 10px 0 32px; flex: 1; }

.nav-flat-link {
  display: block;
  padding: 7px 20px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  border-left: 3px solid transparent;
  transition: background 0.12s, color 0.12s;
}

.nav-flat-link:hover { color: var(--text); background: var(--hover-bg); }

.nav-flat-link.active {
  color: var(--primary);
  background: var(--active-bg);
  border-left-color: var(--primary);
  font-weight: 500;
}

.nav-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 10px 20px 5px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 10.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.9px;
  color: #aaa;
  margin-top: 6px;
}

.nav-group-header:hover { color: #666; }

.chevron {
  font-style: normal;
  font-size: 9px;
  transition: transform 0.2s;
  display: inline-block;
}

.nav-group.collapsed .chevron { transform: rotate(-90deg); }

.nav-group-items { overflow: hidden; transition: max-height 0.25s ease; }
.nav-group.collapsed .nav-group-items { max-height: 0 !important; }

.nav-child {
  display: block;
  padding: 6px 20px 6px 34px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13.5px;
  border-left: 3px solid transparent;
  transition: background 0.12s, color 0.12s;
}

.nav-child:hover { color: var(--text); background: var(--hover-bg); }

.nav-child.active {
  color: var(--primary);
  background: var(--active-bg);
  border-left-color: var(--primary);
  font-weight: 500;
}

/* ── Content ── */
.content {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  padding: 48px 52px 100px;
}

.content-inner { max-width: var(--content-max); margin: 0 auto; }

/* ── Typography ── */
section { scroll-margin-top: 20px; margin-bottom: 72px; }

h1 {
  font-size: 30px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.6px;
  margin-bottom: 10px;
  line-height: 1.25;
}

.section-lead {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.65;
}

h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin: 44px 0 12px;
  padding-top: 44px;
  border-top: 1px solid var(--border);
  scroll-margin-top: 20px;
  letter-spacing: -0.3px;
}

.no-border-top { border-top: none; padding-top: 0; margin-top: 0; }

h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  margin: 28px 0 10px;
  scroll-margin-top: 20px;
}

h4 {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text-secondary);
  margin: 20px 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

p { margin-bottom: 14px; color: #2c2c3e; }

ul, ol { padding-left: 22px; margin-bottom: 14px; }
li { margin-bottom: 6px; color: #2c2c3e; }

strong { font-weight: 600; }

code {
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'SF Mono', 'Cascadia Code', Consolas, monospace;
  font-size: 13px;
  color: #c41d7f;
  border: 1px solid #ebebeb;
}

/* ── Step header badges ── */
.step-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.step-icon-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 14px 5px 10px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  border: 1.5px solid;
  white-space: nowrap;
}

.step-icon-badge .icon { font-size: 15px; }

/* Step colors */
.badge-trigger    { background: #f6ffed; border-color: #52c41a; color: #237804; }
.badge-userform   { background: #e6f4ff; border-color: #1677ff; color: #0040a1; }
.badge-apicall    { background: #fff7e6; border-color: #fa8c16; color: #ad4e00; }
.badge-script     { background: #f9f0ff; border-color: #722ed1; color: #391085; }
.badge-ai         { background: #fff0f6; border-color: #eb2f96; color: #9e1068; }
.badge-email      { background: #e6fffb; border-color: #13c2c2; color: #006d75; }
.badge-delay      { background: #feffe6; border-color: #d4b106; color: #614700; }
.badge-subprocess { background: #f0f5ff; border-color: #2f54eb; color: #10239e; }
.badge-webhook    { background: #fcffe6; border-color: #7cb305; color: #3f6600; }
.badge-entity     { background: #f0fff4; border-color: #08979c; color: #00474f; }
.badge-foreach    { background: #e6f7ff; border-color: #096dd9; color: #003a8c; }
.badge-end        { background: #fff1f0; border-color: #f5222d; color: #a8071a; }

/* ── Field table ── */
.field-table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0 22px;
  font-size: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.field-table th {
  text-align: left;
  padding: 10px 16px;
  background: #fafafa;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  font-size: 12px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.field-table td {
  padding: 10px 16px;
  border-bottom: 1px solid #f0f0f0;
  vertical-align: top;
  line-height: 1.55;
}

.field-table tr:last-child td { border-bottom: none; }
.field-table tr:hover td { background: #fafafa; }

.field-name { font-weight: 500; font-family: 'SF Mono', Consolas, monospace; font-size: 13px; }

.req {
  display: inline-block;
  font-size: 10px;
  background: #fff1f0;
  color: #cf1322;
  border: 1px solid #ffa39e;
  padding: 1px 5px;
  border-radius: 3px;
  font-weight: 700;
  margin-left: 5px;
  vertical-align: middle;
  font-family: sans-serif;
}

/* ── Callouts ── */
.callout {
  padding: 13px 18px;
  border-radius: var(--radius);
  margin: 16px 0;
  border-left: 4px solid;
  font-size: 14px;
  line-height: 1.6;
}

.callout.tip  { background: #f6ffed; border-color: #52c41a; color: #135200; }
.callout.note { background: #e6f4ff; border-color: #1677ff; color: #003eb3; }
.callout.warn { background: #fffbe6; border-color: #faad14; color: #614700; }

.callout-title { font-weight: 700; font-size: 13px; text-transform: uppercase; letter-spacing: 0.3px; margin-bottom: 4px; opacity: 0.8; }

/* ── Status badges (monitoring) ── */
.status-pill {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
  font-family: 'SF Mono', Consolas, monospace;
}

.s-running   { background: #e6f4ff; color: #1677ff; }
.s-waiting   { background: #fff7e6; color: #d46b08; }
.s-completed { background: #f6ffed; color: #389e0d; }
.s-failed    { background: #fff1f0; color: #cf1322; }
.s-cancelled { background: #f5f5f5; color: #8c8c8c; }

/* ── Plan grid ── */
.plan-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 20px 0 8px; }

.plan-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  background: #fff;
}

.plan-card.plan-highlight { border-color: var(--primary); box-shadow: 0 0 0 1px var(--primary); }

.plan-tier {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 2px 8px;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 8px;
}

.tier-free { background: #f5f5f5; color: #595959; }
.tier-pro  { background: #e6f4ff; color: #1677ff; }
.tier-biz  { background: #f9f0ff; color: #722ed1; }

.plan-name { font-size: 18px; font-weight: 700; margin-bottom: 12px; }
.plan-limit { font-size: 13.5px; color: var(--text-secondary); margin-bottom: 4px; }
.plan-limit strong { color: var(--text); }

/* ── Steps ordered list ── */
.steps-list { list-style: none; padding: 0; counter-reset: step-counter; margin: 16px 0; }

.steps-list li {
  counter-increment: step-counter;
  display: flex;
  gap: 14px;
  margin-bottom: 14px;
  align-items: flex-start;
}

.steps-list li::before {
  content: counter(step-counter);
  min-width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}

/* ── Concept cards ── */
.concept-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 16px 0; }

.concept-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  background: #fff;
}

.concept-card-title { font-weight: 700; font-size: 14px; margin-bottom: 5px; color: var(--text); }
.concept-card-desc  { font-size: 13.5px; color: var(--text-secondary); line-height: 1.55; }

/* ── Divider ── */
.divider { border: none; border-top: 1px solid var(--border); margin: 40px 0; }

/* ── Mobile ── */
.menu-toggle {
  display: none;
  position: fixed;
  top: 14px; left: 14px;
  z-index: 200;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius);
  padding: 8px 13px;
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.35);
  z-index: 99;
}

@media (max-width: 800px) {
  .menu-toggle { display: block; }
  .sidebar { transform: translateX(-100%); transition: transform 0.25s ease; box-shadow: none; }
  .sidebar.open { transform: translateX(0); box-shadow: 4px 0 20px rgba(0,0,0,0.1); }
  .sidebar-overlay.visible { display: block; }
  .content { margin-left: 0; padding: 64px 20px 80px; }
  .plan-grid { grid-template-columns: 1fr; }
  .concept-grid { grid-template-columns: 1fr; }
  h1 { font-size: 24px; }
}