/* ───────────────────────────────────────────────────────────────────
   meshTerm docs — shared stylesheet
   Design tokens come from the v1.x landing page; v2.0 adds the
   placeholder-figure system (.screenshot-placeholder) so capture
   specs are visible inline until a real screenshot lands.
   ─────────────────────────────────────────────────────────────────── */

:root {
  --blue: #0A84FF;
  --blue-dark: #0060DF;
  --green: #30D158;
  --orange: #FF9F0A;
  --text: #1C1C1E;
  --text-sec: #636366;
  --text-tert: #AEAEB2;
  --surface: #F2F2F7;
  --surface2: #E5E5EA;
  --border: #D1D1D6;
  --pro-accent: #8b5cf6;
  --code-bg: #F2F2F7;
  --sidebar-width: 260px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text",
               "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: #fff;
}

/* ── Site header ── */
header.site-header {
  background: linear-gradient(135deg, #0A84FF 0%, #2563EB 100%);
  color: white;
  padding: 56px 24px 44px;
  text-align: center;
}

header.site-header .app-name {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
  opacity: .9;
  margin-bottom: 10px;
}

header.site-header h1 {
  font-size: 34px;
  font-weight: 800;
  margin-bottom: 14px;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

header.site-header .sub {
  font-size: 17px;
  opacity: .9;
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.5;
}

/* ── Top nav ── */
.nav-links {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  text-align: center;
  padding: 14px 24px;
  font-size: 14px;
  font-weight: 500;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-links a {
  color: var(--blue);
  text-decoration: none;
  margin: 0 14px;
  display: inline-block;
}

.nav-links a:hover { text-decoration: underline; }
.nav-links a.current { color: var(--text); font-weight: 700; }

.nav-links .lang {
  color: var(--text-sec);
  font-weight: 600;
  border-left: 1px solid var(--border);
  padding-left: 16px;
  margin-left: 4px;
}

/* ── Page layout (user guide) ── */
.page-body {
  display: flex;
  max-width: 1200px;
  margin: 0 auto;
  background: white;
}

.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  position: sticky;
  top: 48px;
  height: calc(100vh - 48px);
  overflow-y: auto;
  background: white;
  border-right: 1px solid var(--border);
  padding: 28px 20px;
}

.sidebar-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-tert);
  margin-bottom: 14px;
  padding: 0 8px;
}

.sidebar ul { list-style: none; }
.sidebar li { margin-bottom: 2px; }
.sidebar a {
  text-decoration: none;
  color: var(--text-sec);
  font-size: 14px;
  display: block;
  padding: 7px 10px;
  border-radius: 8px;
  transition: all 0.15s;
  line-height: 1.4;
}

.sidebar a:hover,
.sidebar a.active {
  background: #EFF6FF;
  color: var(--blue);
}

main {
  flex: 1;
  padding: 48px 52px 80px;
  min-width: 0;
  background: white;
}

main.single-column {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.page-title {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.page-subtitle {
  font-size: 16px;
  color: var(--text-sec);
  margin-bottom: 40px;
}

section { margin-bottom: 56px; scroll-margin-top: 72px; }

h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  padding-bottom: 10px;
  margin-top: 0;
  margin-bottom: 20px;
}

h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  margin-top: 28px;
  margin-bottom: 8px;
}

h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-sec);
  margin-top: 20px;
  margin-bottom: 6px;
}

p { margin-bottom: 12px; color: var(--text); }

ul, ol {
  padding-left: 22px;
  margin-bottom: 12px;
  color: var(--text);
}

li { margin-bottom: 4px; }
li ul, li ol { margin-top: 4px; margin-bottom: 4px; }

a { color: var(--blue); }

/* ── Pro Badge ── */
.pro-badge {
  background: var(--pro-accent);
  color: white;
  font-size: 10px;
  padding: 2px 7px;
  border-radius: 4px;
  font-weight: 700;
  text-transform: uppercase;
  margin-left: 6px;
  vertical-align: middle;
  letter-spacing: .05em;
}

.new-badge {
  background: var(--green);
  color: white;
  font-size: 10px;
  padding: 2px 7px;
  border-radius: 4px;
  font-weight: 700;
  text-transform: uppercase;
  margin-left: 6px;
  vertical-align: middle;
  letter-spacing: .05em;
}

/* ── Callouts ── */
.callout {
  border-radius: 10px;
  padding: 14px 18px;
  margin: 16px 0;
  font-size: 15px;
  line-height: 1.6;
}

.callout.info {
  background: #EBF4FF;
  border-left: 4px solid var(--blue);
  color: var(--blue-dark);
}

.callout.tip {
  background: #E8F9EE;
  border-left: 4px solid var(--green);
  color: #1A7A35;
}

.callout.warn {
  background: #FFF5E5;
  border-left: 4px solid var(--orange);
  color: #8C4400;
}

blockquote {
  border-left: 3px solid var(--blue);
  background: #EFF6FF;
  margin: 20px 0;
  padding: 14px 18px;
  border-radius: 0 10px 10px 0;
  color: var(--text-sec);
  font-size: 15px;
}

/* ── Inline code (kept for v1 carry-over examples; rarely used) ── */
code {
  font-family: "SF Mono", ui-monospace, "Fira Code", monospace;
  background: var(--code-bg);
  padding: 0.15rem 0.4rem;
  border-radius: 5px;
  font-size: 0.875em;
  color: #c0355a;
  border: 1px solid var(--border);
}

/* ── Tables ── */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 15px;
}

th, td {
  text-align: left;
  padding: 10px 14px;
  border: 1px solid var(--border);
}

th {
  background: var(--surface);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--text-sec);
}

tr:hover td { background: #FAFAFA; }

/* ──────────────────────────────────────────────────────────────────
   Screenshot placeholder system

   Pattern (per the docs rewrite brief):

     <figure class="screenshot-placeholder">
       <img src="images/foo.png" alt="..."
            onload="this.closest('figure').classList.add('has-image')"
            onerror="this.style.display='none'">
       <div class="placeholder-box" aria-hidden="true">
         <span class="ph-camera">📷</span>
         <span class="ph-filename">images/foo.png</span>
         <span class="ph-status">placeholder · upload to replace</span>
       </div>
       <figcaption class="capture-spec">
         <strong>Capture spec:</strong> …
       </figcaption>
     </figure>

   - Until the image loads, .placeholder-box is the prominent block
     and .capture-spec is visible below it.
   - Once the image loads, the figure gains .has-image (via the
     onload attribute on the <img>). The placeholder-box is hidden
     and the capture-spec collapses to a small caption.
   - If the image file doesn't exist, onerror hides the <img>; the
     placeholder + capture-spec stay visible.

   Plain CSS + 2 inline event handlers. No framework, no build step.
   ────────────────────────────────────────────────────────────────── */

main figure {
  margin: 24px 0;
  text-align: center;
}

main figure img {
  display: block;
  width: 100%;
  max-width: 320px;
  border-radius: 10px;
  margin: 0 auto;
}

.screenshot-placeholder {
  margin: 24px 0;
  background: var(--surface);
  border-radius: 14px;
  padding: 12px;
  border: 1px solid var(--border);
}

.screenshot-placeholder img {
  display: none;
  width: 100%;
  max-width: 320px;
  border-radius: 10px;
  margin: 0 auto 10px;
}

.screenshot-placeholder.has-image img {
  display: block;
}

.screenshot-placeholder .placeholder-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 36px 24px;
  border: 2px dashed #B0B0B8;
  border-radius: 10px;
  background: #FAFAFC;
  text-align: center;
  margin-bottom: 12px;
}

.screenshot-placeholder.has-image .placeholder-box {
  display: none;
}

.screenshot-placeholder .ph-camera {
  font-size: 32px;
  line-height: 1;
}

.screenshot-placeholder .ph-filename {
  font-family: "SF Mono", ui-monospace, "Fira Code", monospace;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  background: white;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  word-break: break-all;
}

.screenshot-placeholder .ph-status {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-tert);
  font-weight: 600;
}

.screenshot-placeholder .capture-spec {
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-sec);
  background: white;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
}

.screenshot-placeholder.has-image .capture-spec {
  background: transparent;
  border: none;
  padding: 6px 4px 2px;
  text-align: center;
  font-size: 12px;
  color: var(--text-tert);
}

.screenshot-placeholder .capture-spec strong {
  color: var(--text);
  display: inline-block;
  margin-right: 4px;
}

.screenshot-placeholder.has-image .capture-spec strong {
  display: none;
}

.screenshot-placeholder .capture-spec code {
  font-size: 11px;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 1px 5px;
}

/* Side-by-side row of placeholders. */
.screenshot-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 24px 0;
}

.screenshot-row .screenshot-placeholder {
  flex: 1 1 280px;
  margin: 0;
}

/* ── Footer ── */
footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 32px 24px;
  font-size: 14px;
  color: var(--text-sec);
}

footer a { color: var(--blue); text-decoration: none; font-weight: 500; }
footer a:hover { text-decoration: underline; }

/* ── Responsive ── */
@media (max-width: 860px) {
  .page-body { flex-direction: column; }
  .sidebar {
    width: 100%;
    height: auto;
    position: relative;
    top: 0;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 16px 20px;
  }
  main { padding: 32px 20px 60px; }
  header.site-header h1 { font-size: 26px; }
  .screenshot-placeholder .placeholder-box { padding: 28px 16px; }
}