/* Click2Call dashboard — Apple design language (see DESIGN-apple.md).
   Single accent (Action Blue), SF Pro / Inter, hairline cards, pill CTAs,
   no decorative chrome, no shadows on UI. */

:root {
  --primary: #0066cc;
  --primary-focus: #0071e3;
  --primary-on-dark: #2997ff;
  --ink: #1d1d1f;
  --ink-muted-80: #333333;
  --ink-muted-48: #7a7a7a;
  --divider-soft: #f0f0f0;
  --hairline: #e0e0e0;
  --canvas: #ffffff;
  --parchment: #f5f5f7;
  --pearl: #fafafc;
  --black: #000000;
  --ok: #1a7f37;
  --warn: #9a6700;
  --bad: #b42318;

  --r-sm: 8px;
  --r-md: 11px;
  --r-lg: 18px;
  --r-pill: 9999px;

  --s-xxs: 4px;
  --s-xs: 8px;
  --s-sm: 12px;
  --s-md: 17px;
  --s-lg: 24px;
  --s-xl: 32px;
  --s-xxl: 48px;

  --font: "Inter", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--parchment);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.47;
  letter-spacing: -0.374px;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss03";
}

h1, h2, h3 {
  font-weight: 600;
  letter-spacing: -0.374px;
  margin: 0;
}
h1 { font-size: 40px; line-height: 1.1; letter-spacing: -0.5px; }
h2 { font-size: 28px; line-height: 1.14; }
h3 { font-size: 21px; line-height: 1.19; letter-spacing: -0.2px; }

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.muted { color: var(--ink-muted-48); }
.caption { font-size: 14px; letter-spacing: -0.224px; }
.mono { font-family: "SF Mono", ui-monospace, "Cascadia Code", monospace; }

/* ---- Global nav (true black, thin) ---- */
.global-nav {
  background: var(--black);
  color: #fff;
  height: 48px;
  display: flex;
  align-items: center;
  padding: 0 var(--s-lg);
  gap: var(--s-md);
}
.global-nav .brand {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.2px;
}
.global-nav .spacer { flex: 1; }
.global-nav .nav-meta { font-size: 12px; color: #cccccc; letter-spacing: -0.12px; }

/* ---- Sub-nav (frosted parchment) ---- */
.sub-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(245, 245, 247, 0.8);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--hairline);
  height: 52px;
  display: flex;
  align-items: center;
  gap: var(--s-lg);
  padding: 0 var(--s-lg);
}
.sub-nav .section-name { font-size: 21px; font-weight: 600; letter-spacing: -0.2px; }
.sub-nav .tabs { display: flex; gap: var(--s-xs); flex: 1; }
.sub-nav .tab {
  font-size: 14px;
  letter-spacing: -0.224px;
  color: var(--ink-muted-80);
  background: transparent;
  border: 0;
  padding: 8px 14px;
  border-radius: var(--r-pill);
  cursor: pointer;
  font-family: var(--font);
}
.sub-nav .tab.active { background: var(--canvas); color: var(--ink); font-weight: 600; }
.sub-nav .tab:active { transform: scale(0.96); }

/* ---- Layout ---- */
.page { max-width: 1100px; margin: 0 auto; padding: var(--s-xl) var(--s-lg) 96px; }
.view { display: none; }
.view.active { display: block; }
.view-head { margin-bottom: var(--s-lg); }
.view-head p { margin: var(--s-xs) 0 0; color: var(--ink-muted-48); font-size: 14px; }

.grid { display: grid; gap: var(--s-lg); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 833px) {
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }
}

/* ---- Cards (store-utility-card grammar) ---- */
.card {
  background: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: var(--s-lg);
}
.card h3 { margin-bottom: var(--s-sm); }
.card + .card { margin-top: var(--s-lg); }

.stat {
  background: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: var(--s-lg);
}
.stat .num { font-size: 40px; font-weight: 600; letter-spacing: -0.5px; line-height: 1; }
.stat .lbl { font-size: 14px; color: var(--ink-muted-48); margin-top: var(--s-xs); letter-spacing: -0.224px; }

/* ---- Buttons ---- */
.btn {
  font-family: var(--font);
  font-size: 17px;
  font-weight: 400;
  letter-spacing: -0.374px;
  border: 0;
  cursor: pointer;
  border-radius: var(--r-pill);
  padding: 11px 22px;
  background: var(--primary);
  color: #fff;
  transition: transform 0.08s ease;
}
.btn:active { transform: scale(0.95); }
.btn:focus-visible { outline: 2px solid var(--primary-focus); outline-offset: 2px; }
.btn:disabled { background: var(--divider-soft); color: var(--ink-muted-48); cursor: not-allowed; }
.btn.ghost { background: transparent; color: var(--primary); border: 1px solid var(--primary); }
.btn.dark { background: var(--ink); color: #fff; border-radius: var(--r-sm); font-size: 14px; padding: 8px 15px; }
.btn.danger { background: var(--bad); }
.btn.sm { font-size: 14px; padding: 8px 16px; }

.btn-row { display: flex; gap: var(--s-sm); flex-wrap: wrap; align-items: center; }

/* ---- Forms ---- */
label.field { display: block; margin-bottom: var(--s-md); }
label.field > span { display: block; font-size: 14px; color: var(--ink-muted-80); margin-bottom: var(--s-xxs); letter-spacing: -0.224px; }
input[type=text], input[type=password], input[type=number], select {
  width: 100%;
  font-family: var(--font);
  font-size: 17px;
  letter-spacing: -0.374px;
  color: var(--ink);
  background: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: var(--r-md);
  padding: 11px 14px;
}
input:focus, select:focus { outline: 2px solid var(--primary-focus); outline-offset: 0; border-color: transparent; }
.switch { display: inline-flex; align-items: center; gap: var(--s-xs); font-size: 14px; }

/* ---- Table ---- */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--divider-soft); letter-spacing: -0.224px; }
th { color: var(--ink-muted-48); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.02em; }
tr:last-child td { border-bottom: 0; }

/* ---- Badges / status ---- */
.badge { display: inline-block; font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: var(--r-pill); letter-spacing: -0.12px; }
.badge.gray { background: var(--parchment); color: var(--ink-muted-80); }
.badge.blue { background: rgba(0,102,204,0.1); color: var(--primary); }
.badge.green { background: rgba(26,127,55,0.12); color: var(--ok); }
.badge.red { background: rgba(180,35,24,0.1); color: var(--bad); }
.badge.amber { background: rgba(154,103,0,0.12); color: var(--warn); }

/* ---- Toast ---- */
.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%);
  background: var(--ink); color: #fff; padding: 12px 20px; border-radius: var(--r-md);
  font-size: 14px; letter-spacing: -0.224px; opacity: 0; pointer-events: none;
  transition: opacity 0.2s ease; z-index: 100; max-width: 80vw;
}
.toast.show { opacity: 1; }
.toast.bad { background: var(--bad); }

/* ---- Sandbox specifics ---- */
.timeline { display: flex; gap: var(--s-xs); align-items: center; flex-wrap: wrap; margin: var(--s-md) 0; }
.step { font-size: 13px; padding: 6px 12px; border-radius: var(--r-pill); background: var(--parchment); color: var(--ink-muted-48); border: 1px solid var(--hairline); }
.step.done { background: rgba(0,102,204,0.1); color: var(--primary); border-color: transparent; }
.step.active { background: var(--primary); color: #fff; border-color: transparent; }
.step.fail { background: rgba(180,35,24,0.1); color: var(--bad); border-color: transparent; }
.timer { font-size: 40px; font-weight: 600; letter-spacing: -0.5px; font-variant-numeric: tabular-nums; }
pre.payload {
  background: var(--ink); color: #e6e6e6; padding: var(--s-md); border-radius: var(--r-md);
  font-size: 12.5px; line-height: 1.5; overflow: auto; font-family: "SF Mono", ui-monospace, monospace;
  letter-spacing: 0;
}
.kv { display: grid; grid-template-columns: max-content 1fr; gap: 4px 16px; font-size: 14px; }
.kv .k { color: var(--ink-muted-48); }

/* ---- Icons ---- */
.ic { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; flex: none; vertical-align: -4px; }
.ic.sm { width: 16px; height: 16px; stroke-width: 2; vertical-align: -3px; }
.ic.lg { width: 30px; height: 30px; stroke-width: 1.6; }
.view-head h1 { display: flex; align-items: center; gap: 12px; }
.view-head h1 .ic { width: 28px; height: 28px; color: var(--primary); }
.card h3 { display: flex; align-items: center; gap: 9px; }
.card h3 .ic { color: var(--primary); }
.sub-nav .tab { display: inline-flex; align-items: center; gap: 7px; }

/* ---- How-it-works gradient hero tiles (per reference) ---- */
.steps-hero { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-lg); }
@media (max-width: 833px) { .steps-hero { grid-template-columns: 1fr; } }
.gtile {
  position: relative;
  border-radius: var(--r-lg);
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  overflow: hidden;
}
.gtile .ic { width: 44px; height: 44px; stroke-width: 1.4; }
.gtile .dot { position: absolute; top: 14px; right: 14px; width: 9px; height: 9px; border-radius: 50%; background: #c3f53c; box-shadow: 0 0 0 4px rgba(195,245,60,0.18); }
.gtile.g1 { background: linear-gradient(135deg, #3a2d6b 0%, #201d33 75%); }
.gtile.g2 { background: linear-gradient(135deg, #4f4aa6 0%, #2a2461 80%); }
.gtile.g3 { background: linear-gradient(135deg, #8a2d4d 0%, #2a1d2f 80%); }
.gtile.g4 { background: linear-gradient(135deg, #0066cc 0%, #062a52 85%); }
.step-body { margin-top: var(--s-sm); }
.step-body h4 { margin: 0 0 4px; font-size: 17px; font-weight: 600; letter-spacing: -0.374px; display: flex; align-items: center; gap: 8px; }
.step-num { display: inline-flex; align-items: center; justify-content: center; min-width: 20px; height: 20px; padding: 0 5px; border-radius: 5px; background: #c3f53c; color: #1d1d1f; font-size: 13px; font-weight: 700; letter-spacing: 0; }
.step-body p { margin: 0; font-size: 14px; line-height: 1.5; color: var(--ink-muted-48); letter-spacing: -0.224px; }
.note-strip { margin-top: var(--s-lg); padding: var(--s-md); background: var(--parchment); border-radius: var(--r-md); font-size: 14px; color: var(--ink-muted-80); letter-spacing: -0.224px; display: flex; gap: 10px; }
.note-strip .ic { color: var(--primary); margin-top: 1px; }

/* ---- Integration guide ---- */
.toc { display: flex; flex-wrap: wrap; gap: var(--s-xs); margin-bottom: var(--s-lg); }
.toc a { font-size: 13px; padding: 6px 12px; border: 1px solid var(--hairline); border-radius: var(--r-pill); color: var(--ink-muted-80); background: var(--canvas); }
.toc a:hover { text-decoration: none; border-color: var(--primary); color: var(--primary); }
.endpoint { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 6px; }
.method { font-size: 12px; font-weight: 700; letter-spacing: 0; padding: 3px 9px; border-radius: 6px; color: #fff; font-family: "SF Mono", ui-monospace, monospace; }
.method.post { background: var(--primary); }
.method.get { background: var(--ok); }
.path { font-family: "SF Mono", ui-monospace, monospace; font-size: 14px; color: var(--ink); }
.endpoint-desc { font-size: 14px; color: var(--ink-muted-48); margin: 0 0 12px; letter-spacing: -0.224px; }
.code-wrap { position: relative; }
.copy-btn {
  position: absolute; top: 10px; right: 10px;
  font-size: 12px; padding: 5px 11px; border-radius: 6px; border: 0; cursor: pointer;
  background: rgba(255,255,255,0.12); color: #fff; font-family: var(--font);
}
.copy-btn:active { transform: scale(0.95); }
.code-wrap pre.payload { margin: 0; }
.dl { display: grid; grid-template-columns: max-content 1fr; gap: 8px 18px; font-size: 14px; letter-spacing: -0.224px; }
.dl dt { font-family: "SF Mono", ui-monospace, monospace; color: var(--primary); }
.dl dd { margin: 0; color: var(--ink-muted-80); }
.doc-h { scroll-margin-top: 70px; margin-top: var(--s-xl); }
.checklist { list-style: none; padding: 0; margin: 0; }
/* Icon is absolutely positioned so the text stays normal inline flow — a flex
   li would turn every inline <span> into its own squished flex column. */
.checklist li { position: relative; padding: 9px 0 9px 30px; border-bottom: 1px solid var(--divider-soft); font-size: 15px; line-height: 1.5; }
.checklist li:last-child { border-bottom: 0; }
.checklist li .ic { position: absolute; left: 0; top: 11px; color: var(--ok); }
.empty { padding: var(--s-lg); text-align: center; color: var(--ink-muted-48); font-size: 14px; }

/* segmented toggle (snippet mode switch) */
.seg-row { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
.seg { display: inline-flex; background: var(--parchment); border: 1px solid var(--hairline); border-radius: var(--r-pill); padding: 3px; }
.seg button { border: 0; background: transparent; font-family: var(--font); font-size: 13px; padding: 6px 16px; border-radius: var(--r-pill); cursor: pointer; color: var(--ink-muted-80); }
.seg button.active { background: var(--canvas); color: var(--ink); font-weight: 600; }
.seg button:active { transform: scale(0.96); }
.seg-note { font-size: 13px; color: var(--ink-muted-48); letter-spacing: -0.224px; }
.seg-note strong { color: var(--primary); }

/* ---- Login ---- */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: var(--s-lg); }
.login-card { width: 360px; max-width: 100%; }
.login-card h1 { font-size: 28px; margin-bottom: var(--s-xs); }
.login-card p { margin: 0 0 var(--s-lg); color: var(--ink-muted-48); font-size: 14px; }