/* Hello Model — warm & friendly theme.
   Warm off-white surfaces, one teal accent, soft rounded corners, roomy spacing. */
:root {
  --bg: #faf7f2;
  --surface: #ffffff;
  --surface-2: #f4efe7;
  --text: #1c1917;
  --muted: #655d57;
  --border: #ebe4da;
  --border-strong: #d8cfc3;
  --accent: #0f766e;
  --accent-hover: #115e59;
  --accent-soft: #e3f3ef;
  --on-accent: #ffffff;
  --ok: #15803d;
  --warn-bg: #fff6e5;
  --warn-border: #f0b955;
  --code-bg: #1c1917;
  --code-text: #f5f1ec;
  --shadow: 0 1px 2px rgba(28, 25, 23, .04), 0 8px 24px rgba(28, 25, 23, .05);
  --side-bg: #f3eee6;
  --r-sm: 8px;
  --r: 14px;
  --r-lg: 20px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #161311; --surface: #1f1b18; --surface-2: #29241f; --text: #f5f1ec; --muted: #b5aca3;
    --border: #342e29; --border-strong: #4a423b; --accent: #2dd4bf; --accent-hover: #5eead4;
    --accent-soft: #10302b; --on-accent: #0b1f1c; --ok: #4ade80; --warn-bg: #2a2112;
    --warn-border: #a16207; --code-bg: #0e0c0b; --shadow: none; --side-bg: #110f0d; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #161311; --surface: #1f1b18; --surface-2: #29241f; --text: #f5f1ec; --muted: #b5aca3;
  --border: #342e29; --border-strong: #4a423b; --accent: #2dd4bf; --accent-hover: #5eead4;
  --accent-soft: #10302b; --on-accent: #0b1f1c; --ok: #4ade80; --warn-bg: #2a2112;
  --warn-border: #a16207; --code-bg: #0e0c0b; --shadow: none; --side-bg: #110f0d; color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg); color: var(--text);
  font: 17px/1.65 "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; font-weight: 700; letter-spacing: -.015em; }
h2 { font-size: 1.6rem; }
h3 { font-size: 1.15rem; margin-top: 2em; }
a { color: var(--accent); }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.muted-h { color: var(--muted); font-weight: 600; font-size: .95rem; margin-top: 2.4em; }
.eyebrow { font-size: .8rem; font-weight: 700; color: var(--accent); margin: 0 0 .4em; letter-spacing: .02em; }

main { max-width: 1000px; width: 100%; margin: 0 auto; padding: 40px 28px 80px; flex: 1; }
.foot { text-align: center; color: var(--muted); font-size: .85rem; padding: 28px 16px 44px; }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg); box-shadow: var(--shadow); padding: 28px; }

/* Buttons */
.btn {
  border: 1px solid var(--border-strong); background: var(--surface); color: var(--text);
  padding: 10px 20px; border-radius: 999px; font: inherit; font-size: .95rem; font-weight: 600; cursor: pointer;
  transition: background .15s, border-color .15s, transform .08s;
}
.btn:hover { background: var(--surface-2); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn.big { padding: 13px 28px; font-size: 1.05rem; }
.btn.small { padding: 4px 14px; font-size: .8rem; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.link { background: none; border: none; color: var(--muted); font: inherit; font-size: .95rem; font-weight: 500; cursor: pointer; padding: 6px 4px; text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--border-strong); }
.link:hover { color: var(--text); text-decoration-color: currentColor; }
.back { margin-bottom: 18px; text-decoration: none; }
.row-end { display: flex; justify-content: flex-end; margin-top: 18px; gap: 10px; }
button:focus-visible, textarea:focus-visible, input:focus-visible, summary:focus-visible, .term:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 45%, transparent); outline-offset: 2px;
}

/* Hero & describe */
.hero { text-align: center; padding: 16px 0 32px; }
.hero h1 { font-size: clamp(2.1rem, 5.5vw, 3.3rem); letter-spacing: -.03em; font-weight: 800; }
.grad { color: var(--accent); }
.lead { color: var(--muted); font-size: 1.15rem; margin: 0 auto; max-width: 560px; }

.describe { max-width: 720px; margin: 0 auto; }
.label { font-weight: 700; font-size: 1.05rem; display: block; }
.hint { color: var(--muted); font-size: .92rem; margin: 2px 0 12px; }
textarea {
  width: 100%; resize: vertical; border: 1.5px solid var(--border-strong); border-radius: var(--r); padding: 14px 16px;
  font: inherit; background: var(--bg); color: var(--text); transition: border-color .15s, box-shadow .15s;
}
textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); outline: none; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.chip {
  border: 1px solid var(--border); background: var(--surface-2); color: var(--text); border-radius: 999px;
  padding: 6px 14px; font: inherit; font-size: .85rem; cursor: pointer; transition: border-color .15s, color .15s;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }

.how { list-style: none; display: flex; justify-content: center; flex-wrap: wrap; gap: 8px 28px; padding: 0; margin: 32px auto; color: var(--muted); font-size: .95rem; }
.how li { display: flex; align-items: center; gap: 10px; }
.num { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-weight: 700; font-size: .85rem; }

.browse { max-width: 720px; margin: 0 auto; padding: 0; overflow: hidden; }
.browse summary, .more-card summary {
  cursor: pointer; font-weight: 600; padding: 18px 24px; list-style: none; display: flex; justify-content: space-between; align-items: center;
}
.browse summary::-webkit-details-marker, .more-card summary::-webkit-details-marker, .more summary::-webkit-details-marker, .code-block summary::-webkit-details-marker { display: none; }
.browse summary::after, .more-card summary::after { content: ""; width: 9px; height: 9px; border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted); transform: rotate(45deg); transition: transform .2s; margin-right: 4px; }
.browse[open] summary::after, .more-card[open] summary::after { transform: rotate(-135deg); }
.browse .uc-grid { padding: 0 24px 24px; margin-top: 0; }

.uc-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; margin-top: 12px; }
.uc-card {
  text-align: left; border: 1px solid var(--border); background: var(--surface); color: var(--text); border-radius: var(--r);
  padding: 16px 18px; cursor: pointer; font: inherit; transition: border-color .15s, transform .12s, box-shadow .15s;
}
.uc-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: var(--shadow); }
.uc-card .ic { font-size: 1.5rem; }
.uc-card b { display: block; margin: 6px 0 2px; font-size: .98rem; }
.uc-card span { color: var(--muted); font-size: .88rem; }
.uc-grid.compact .uc-card span { display: none; }

/* Detect */
.detect-main { display: grid; grid-template-columns: auto 1fr; gap: 22px; align-items: start; }
.big-ic { flex: none; font-size: 2.4rem; line-height: 1; width: 72px; height: 72px; display: grid; place-items: center; background: var(--accent-soft); border-radius: var(--r-lg); }
.conf { display: inline-block; padding: 3px 12px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); font-size: .8rem; font-weight: 700; }
.matched { font-size: .9rem; color: var(--muted); }
.matched code { background: var(--surface-2); border-radius: 6px; padding: 1px 7px; font-size: .82rem; }
.no-match { background: var(--warn-bg); border: 1px solid var(--warn-border); border-radius: var(--r); padding: 14px 18px; }

/* Questions */
.q-progress { height: 8px; background: var(--surface-2); border-radius: 999px; overflow: hidden; }
.q-bar { height: 100%; width: 0; background: var(--accent); border-radius: 999px; transition: width .35s ease; }
.q-count { color: var(--muted); font-size: .9rem; margin: 10px 0 18px; }
.q-card { max-width: 720px; margin: 0 auto; }
.screen#screen-questions { max-width: 720px; margin: 0 auto; }
.q-card h2 { font-size: 1.5rem; }
.q-options { display: grid; gap: 10px; margin-top: 20px; }
.q-opt {
  display: flex; flex-direction: column; align-items: flex-start; text-align: left; border: 1.5px solid var(--border);
  background: var(--surface); color: var(--text); border-radius: var(--r); padding: 14px 18px; cursor: pointer; font: inherit;
  transition: border-color .15s, background .15s;
}
.q-opt:hover { border-color: var(--border-strong); background: var(--bg); }
.q-opt.selected { border-color: var(--accent); background: var(--accent-soft); }
.q-opt b { font-size: 1.02rem; }
.q-opt span { color: var(--muted); font-size: .9rem; }
.q-opt kbd { display: none; }

/* Plan */
.plan-head { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; align-items: flex-end; margin-bottom: 24px; }
.plan-head h2 { margin-bottom: .2em; }
.plan-head p { margin: 0; }
.plan-actions { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.tabs { display: inline-flex; flex-wrap: wrap; gap: 4px; padding: 4px; background: var(--surface-2); border-radius: 22px; margin-bottom: 24px; max-width: 100%; }
.tab { background: none; border: none; border-radius: 999px; padding: 8px 18px; font: inherit; font-size: .92rem; font-weight: 600; color: var(--muted); cursor: pointer; white-space: nowrap; }
.tab:hover { color: var(--text); }
.tab.active { background: var(--surface); color: var(--text); box-shadow: 0 1px 3px rgba(28, 25, 23, .1); }

.overall { margin-bottom: 18px; padding: 16px 22px; }
.overall-top { display: flex; justify-content: space-between; margin-bottom: 10px; font-size: .92rem; }
.overall-top span { color: var(--muted); font-variant-numeric: tabular-nums; }

.guide { display: grid; grid-template-columns: 250px 1fr; gap: 20px; align-items: start; }
.stepper { list-style: none; margin: 0; padding: 0; position: sticky; top: 24px; }
.stepper li button {
  display: flex; gap: 12px; align-items: center; width: 100%; text-align: left; background: none; border: none;
  padding: 9px 12px; border-radius: var(--r-sm); font: inherit; font-size: .92rem; color: var(--muted); cursor: pointer;
}
.stepper li button:hover { background: var(--surface-2); color: var(--text); }
.stepper li.active button { background: var(--accent-soft); color: var(--text); font-weight: 700; }
.stepper .dot {
  flex: none; display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%;
  border: 1.5px solid var(--border-strong); font-size: .8rem; font-weight: 700; background: var(--surface);
}
.stepper li.done .dot { background: var(--ok); border-color: var(--ok); color: #fff; }
.stepper li.active .dot { border-color: var(--accent); background: var(--accent); color: var(--on-accent); }

.step { padding: 32px 36px; }
.step h2 { font-size: 1.55rem; }
.step:focus { outline: none; }
.simple { background: var(--accent-soft); border-radius: var(--r); padding: 14px 18px; margin: 14px 0; }
.simple b { color: var(--accent); }
.why { color: var(--muted); }
.step h4 { margin: 22px 0 8px; font-size: 1rem; font-weight: 700; }
.step ul { margin: 0; padding-left: 22px; }
.step li { margin: 5px 0; }
.step li::marker { color: var(--accent); }

.more { margin-top: 16px; }
.more summary {
  cursor: pointer; list-style: none; display: inline-flex; align-items: center; gap: 8px;
  color: var(--accent); font-weight: 600; font-size: .95rem; padding: 6px 0;
}
.more summary::before { content: ""; width: 7px; height: 7px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: rotate(-45deg); transition: transform .2s; }
.more[open] summary::before { transform: rotate(45deg); }
.more[open] summary { margin-bottom: 4px; }
.more summary .count { background: var(--accent-soft); border-radius: 999px; padding: 0 9px; font-size: .78rem; }

.codes { display: grid; gap: 10px; margin-top: 18px; }
.codes:empty { display: none; }
.code-block { border: 1px solid var(--border); border-radius: var(--r); overflow: hidden; background: var(--surface); }
.code-block summary {
  cursor: pointer; list-style: none; display: flex; align-items: center; gap: 10px; padding: 12px 16px; font-size: .92rem; font-weight: 600;
}
.code-block summary::after { content: "Show code"; margin-left: auto; color: var(--accent); font-size: .85rem; white-space: nowrap; }
.code-block[open] summary::after { content: "Hide"; }
.code-block summary:hover { background: var(--bg); }
.code-tag { flex: none; background: var(--surface-2); color: var(--muted); border-radius: 6px; padding: 1px 8px; font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; }
.code-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; background: var(--code-bg); color: #a8a29e; padding: 8px 10px 0 16px; font-size: .78rem; }
.code-head .btn { background: transparent; color: #e7e5e4; border-color: #57534e; }
.code-head .btn:hover { background: #292524; }
.code-block pre { margin: 0; background: var(--code-bg); color: var(--code-text); padding: 12px 16px 16px; overflow-x: auto; font-size: .82rem; line-height: 1.6; }

.checklist { margin-top: 26px; background: var(--bg); border-radius: var(--r); padding: 6px 18px 12px; }
.checklist h4 { margin-top: 12px; }
.checklist label { display: flex; gap: 12px; align-items: center; padding: 6px 0; cursor: pointer; }
.checklist input { accent-color: var(--ok); width: 19px; height: 19px; flex: none; margin: 0; }
.checklist input:checked + span { color: var(--muted); text-decoration: line-through; }
.tip { margin-top: 16px; padding: 12px 18px; border-radius: var(--r); background: var(--warn-bg); font-size: .95rem; }
.tip b { margin-right: 6px; }
.step-nav { display: flex; justify-content: space-between; margin-top: 28px; gap: 10px; }
.step-nav #prevStep { flex: none; white-space: nowrap; }

.term { border-bottom: 1.5px dotted var(--accent); cursor: help; }
.tooltip {
  position: fixed; z-index: 50; max-width: 300px; background: var(--text); color: var(--bg); border-radius: 10px;
  padding: 9px 13px; font-size: .85rem; line-height: 1.5; pointer-events: none; box-shadow: 0 8px 24px rgba(0, 0, 0, .18);
}

/* Tech stack tab */
.summary-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 16px; }
.summary-grid h3 { margin-top: 0; }
.summary-grid p { margin-top: 0; }
.warn { background: var(--warn-bg); border: 1px solid var(--warn-border); border-radius: var(--r); padding: 12px 18px; margin-bottom: 10px; font-size: .95rem; }
.arch { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.arch-node { background: var(--surface-2); border-radius: var(--r); padding: 10px 14px; min-width: 120px; }
.arch-node b { display: block; font-size: .9rem; }
.arch-node small { color: var(--muted); font-size: .78rem; }
.arch-node.mon { background: transparent; border: 1.5px dashed var(--border-strong); }
.arch-arrow { color: var(--accent); font-weight: 700; padding: 0 2px; }
.stack { display: grid; gap: 14px; }
.stack-row { display: grid; grid-template-columns: 170px 1fr; gap: 12px; align-items: center; }
.stack-row > b { font-size: .9rem; color: var(--muted); font-weight: 600; }
.pills { display: flex; flex-wrap: wrap; gap: 6px; }
.pill { background: var(--accent-soft); color: var(--accent); border-radius: 999px; padding: 3px 12px; font-size: .85rem; font-weight: 600; }
.more-card { margin-top: 28px; padding: 0; overflow: hidden; }
.table-wrap { overflow-x: auto; border-top: 1px solid var(--border); }
table.infra { width: 100%; border-collapse: collapse; font-size: .93rem; }
.infra th { font-size: .8rem; color: var(--muted); font-weight: 700; background: var(--bg); }
.infra th, .infra td { text-align: left; padding: 11px 24px; border-bottom: 1px solid var(--border); vertical-align: top; }
.infra tr:last-child td { border-bottom: none; }
.infra td:first-child { font-weight: 600; white-space: nowrap; width: 1%; }

@media (max-width: 820px) {
  body { font-size: 16px; }
  main { padding-top: 28px; }
  .card { padding: 22px; }
  .guide { grid-template-columns: 1fr; }
  .stepper { position: static; display: flex; overflow-x: auto; gap: 4px; padding-bottom: 4px; }
  .stepper li button span.t { display: none; }
  .stepper li.active button span.t { display: inline; white-space: nowrap; }
  .step { padding: 22px; }
  .summary-grid { grid-template-columns: 1fr; }
  .stack-row { grid-template-columns: 1fr; gap: 6px; }
  .detect-main { grid-template-columns: 1fr; }
  .infra th, .infra td { padding: 10px 16px; }
  .infra td:first-child { white-space: normal; }
  .plan-actions { width: 100%; }
}

/* App shell: left sidebar + main column */
.shell { display: flex; min-height: 100vh; }
.main-col { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.sidebar {
  width: 268px; min-width: 0; flex: none; position: sticky; top: 0; height: 100vh; display: flex; flex-direction: column;
  background: var(--side-bg); border-right: 1px solid var(--border); padding: 14px 12px; overflow: hidden;
  transition: width .2s ease;
}
.side-head { display: flex; justify-content: space-between; align-items: center; padding: 2px 4px 14px 8px; gap: 8px; }
.brand { font-weight: 800; font-size: 1.08rem; color: var(--text); text-decoration: none; display: flex; gap: 8px; align-items: center; white-space: nowrap; }
.icon-btn {
  flex: none; width: 36px; height: 36px; display: grid; place-items: center; border-radius: 10px; cursor: pointer;
  background: transparent; border: none; color: var(--muted);
}
.icon-btn:hover { background: var(--surface-2); color: var(--text); }
.new-plan {
  display: flex; gap: 10px; align-items: center; width: 100%; padding: 10px 12px; border-radius: 12px; cursor: pointer;
  border: 1px solid var(--border-strong); background: var(--surface); color: var(--text); font: inherit; font-size: .95rem; font-weight: 600;
  box-shadow: 0 1px 2px rgba(28, 25, 23, .05);
}
.new-plan:hover { border-color: var(--accent); color: var(--accent); }
.side-nav { display: grid; gap: 2px; }
.side-label { font-size: .75rem; font-weight: 600; color: var(--muted); margin: 18px 12px 6px; white-space: nowrap; }
.side-nav a, #recents a {
  display: flex; gap: 12px; align-items: center; padding: 8px 12px; border-radius: 10px; color: var(--text);
  text-decoration: none; font-size: .93rem; white-space: nowrap;
}
.side-nav a .i { color: var(--muted); flex: none; }
.side-nav a:hover, #recents a:hover { background: color-mix(in srgb, var(--text) 6%, transparent); }
.side-nav a.active, #recents a.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.side-nav a.active .i { color: var(--accent); }
.recents { flex: 1; min-height: 0; overflow-y: auto; margin-top: 2px; }
#recents { list-style: none; margin: 0; padding: 0; }
#recents li { min-width: 0; margin-bottom: 1px; }
#recents a { font-size: .88rem; color: var(--muted); }
#recents a { overflow: hidden; }
#recents .label-text { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; }
.side-foot { display: flex; align-items: center; padding: 10px 0 0; border-top: 1px solid var(--border); margin-top: auto; }
.theme-btn {
  display: flex; gap: 12px; align-items: center; width: 100%; padding: 8px 12px; border-radius: 10px; cursor: pointer;
  background: transparent; border: none; color: var(--muted); font: inherit; font-size: .9rem; white-space: nowrap;
}
.theme-btn:hover { background: color-mix(in srgb, var(--text) 6%, transparent); color: var(--text); }
.theme-ic { flex: none; width: 18px; display: grid; place-items: center; }
body.sidebar-collapsed .theme-btn { justify-content: center; padding: 10px 0; }
.scrim { display: none; }
.mobile-bar { display: none; }

/* Collapsed sidebar (desktop): icons only */
body.sidebar-collapsed .sidebar { width: 68px; }
.side-nav, .recents, .side-head, .side-foot { min-width: 0; }
body.sidebar-collapsed .sidebar .label-text,
body.sidebar-collapsed .sidebar .side-label,
body.sidebar-collapsed .recents { display: none; }
body.sidebar-collapsed .side-head { flex-direction: column; padding: 2px 0 12px; }
body.sidebar-collapsed .new-plan, body.sidebar-collapsed .side-nav a { justify-content: center; padding: 10px 0; }
body.sidebar-collapsed .side-nav { margin-top: 10px; }
body.sidebar-collapsed .side-foot { justify-content: center; }

/* Page-level text */
.page-title { font-size: clamp(1.8rem, 4vw, 2.4rem); font-weight: 800; letter-spacing: -.025em; margin-bottom: .3em; }
.lead-left { color: var(--muted); font-size: 1.08rem; margin: 0 0 26px; max-width: 640px; }
.browse-link { text-align: center; color: var(--muted); font-size: .95rem; }
.browse-link a { font-weight: 600; text-decoration: none; }
.row-start { margin: 6px 0 4px; }

/* My plans */
.plans-list { display: grid; gap: 12px; }
.plan-card { display: flex; gap: 16px; align-items: center; padding: 18px 22px; }
.plan-card-ic { flex: none; width: 52px; height: 52px; border-radius: 50%; display: grid; place-items: center; font-size: 1.5rem; background: var(--accent-soft); }
.plan-card-body { flex: 1; min-width: 0; display: grid; gap: 3px; }
.plan-card-body b { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.plan-card-body .muted { font-size: .88rem; }
.mini-progress { height: 6px; background: var(--surface-2); border-radius: 999px; overflow: hidden; max-width: 280px; margin-top: 6px; }
.mini-progress div { height: 100%; background: var(--accent); border-radius: 999px; }
.plan-card-actions { display: flex; gap: 8px; align-items: center; flex: none; }
.empty { text-align: center; }

/* Model detail */
.model-hero { display: flex; gap: 20px; align-items: center; margin-bottom: 10px; }
.model-hero .lead-left { margin-bottom: 0; }
.chips.static .chip { cursor: default; background: var(--surface); }
.chips.static .chip:hover { border-color: var(--border); color: var(--text); }
.tier-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.tier { padding: 22px; }
.tier b { display: block; margin-bottom: 6px; line-height: 1.4; }
.tier .muted { font-size: .92rem; }
.who { font-size: .85rem; color: var(--accent); font-weight: 600; margin: 0; }
.info-list { margin-top: 24px; }
.info-list h4 { margin: 0 0 4px; }
.info-list ul { margin: 4px 0 8px; padding-left: 22px; }

/* Training basics */
.topics { display: grid; gap: 12px; }
.topic { padding: 0; overflow: hidden; }
.topic summary { list-style: none; display: flex; gap: 14px; align-items: center; padding: 18px 22px; cursor: pointer; font-weight: 700; font-size: 1.05rem; }
.topic summary::-webkit-details-marker { display: none; }
.topic summary::after { content: ""; margin-left: auto; width: 9px; height: 9px; border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted); transform: rotate(45deg); transition: transform .2s; flex: none; }
.topic[open] summary::after { transform: rotate(-135deg); }
.topic-body { padding: 0 22px 22px; }
.topic-body .simple { margin-top: 0; }
.topic-body ul { margin: 0; padding-left: 22px; }
.topic-body li { margin: 5px 0; }
.topic-body li::marker { color: var(--accent); }

/* Cloud comparison */
.seg { display: inline-flex; flex-wrap: wrap; gap: 4px; padding: 4px; background: var(--surface-2); border-radius: 22px; margin-bottom: 16px; max-width: 100%; }
.seg-btn { background: none; border: none; border-radius: 999px; padding: 8px 16px; font: inherit; font-size: .9rem; font-weight: 600; color: var(--muted); cursor: pointer; white-space: nowrap; }
.seg-btn:hover { color: var(--text); }
.seg-btn.active { background: var(--surface); color: var(--text); box-shadow: 0 1px 3px rgba(28, 25, 23, .1); }
.table-card { padding: 0; overflow: hidden; }
.table-card .table-wrap { border-top: none; }

/* Glossary */
.search {
  width: 100%; max-width: 440px; padding: 12px 18px; border-radius: 999px; border: 1.5px solid var(--border-strong);
  background: var(--surface); color: var(--text); font: inherit; margin-bottom: 20px;
}
.search:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.glossary { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; margin: 0; }
.g-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); padding: 16px 18px; }
.g-item dt { font-weight: 700; margin-bottom: 4px; }
.g-item dd { margin: 0; color: var(--muted); font-size: .93rem; }

@media (max-width: 1100px) {
  .tier-grid { grid-template-columns: 1fr; }
}
@media (max-width: 820px) {
  .sidebar, body.sidebar-collapsed .sidebar {
    position: fixed; left: 0; top: 0; z-index: 40; width: 284px; transform: translateX(-100%);
    transition: transform .22s ease;
  }
  body.sidebar-collapsed .sidebar .label-text, body.sidebar-collapsed .sidebar .side-label { display: inline; }
  body.sidebar-collapsed .sidebar .side-label { display: block; }
  body.sidebar-collapsed .recents { display: block; }
  body.sidebar-collapsed .side-head { flex-direction: row; padding: 2px 4px 14px 8px; }
  body.sidebar-collapsed .new-plan, body.sidebar-collapsed .side-nav a { justify-content: flex-start; padding: 8px 12px; }
  body.nav-open .sidebar { transform: none; box-shadow: 0 10px 40px rgba(0, 0, 0, .25); }
  body.nav-open .scrim { display: block; position: fixed; inset: 0; background: rgba(0, 0, 0, .4); z-index: 30; }
  #collapseBtn { display: none; }
  .mobile-bar {
    display: flex; align-items: center; gap: 6px; position: sticky; top: 0; z-index: 20; height: 56px; padding: 0 10px;
    background: color-mix(in srgb, var(--bg) 90%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border);
  }
  main { padding: 24px 16px 64px; }
  .plan-card { flex-wrap: wrap; }
  .plan-card-actions { width: 100%; justify-content: flex-end; }
  .model-hero .big-ic { width: 56px; height: 56px; font-size: 1.9rem; }
}

/* Ad slots: invisible until AdSense is configured in js/ads.js */
.ad-slot:empty { display: none; }
.ad-slot { margin: 32px auto 0; max-width: 970px; text-align: center; }
.ad-label { display: block; font-size: .72rem; color: var(--muted); margin-bottom: 6px; letter-spacing: .04em; }

/* Long-form text pages */
.prose h2 { font-size: 1.15rem; }
.prose h2, .prose h3 { margin: 1.4em 0 .4em; }
.prose h2:first-child, .prose h3:first-child { margin-top: 0; }
.prose ul { margin: 0 0 .8em; padding-left: 22px; }
.prose li { margin: 4px 0; }
.prose li::marker { color: var(--accent); }
.prose p { margin: 0 0 .8em; }
.prose code { background: var(--surface-2); border-radius: 6px; padding: 1px 6px; font-size: .88em; }
.foot a { color: var(--muted); }

/* Learn pages (generated by scripts/build-site.js) */
a.btn, a.seg-btn, a.uc-card { text-decoration: none; display: inline-block; }
a.uc-card { display: block; }
.section-h { font-size: 1.15rem; margin: 2em 0 .6em; }
.model-facts { margin-top: 24px; }
.libs { font-size: .8rem; color: var(--muted); margin: 8px 0 0; }
.next-card { margin-top: 24px; padding: 20px 24px; }
.next-card p { margin: 0; }
.next-card p + p { margin-top: 4px; font-size: .92rem; }
.lesson-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.lesson-link { display: flex; gap: 14px; align-items: flex-start; padding: 18px 22px; color: var(--text); text-decoration: none; transition: border-color .15s; }
.lesson-link:hover { border-color: var(--accent); }
.lesson-link .num { flex: none; }
.lesson-link b { display: block; font-size: 1.05rem; margin-bottom: 2px; }
.lesson-link .muted { font-size: .92rem; }
.lesson { padding: 22px; }
.lesson ul { margin: 0; padding-left: 22px; }
.lesson li { margin: 5px 0; }
.lesson li::marker { color: var(--accent); }
.step-nav a.btn { max-width: 48%; text-align: center; }
.home-guides { text-align: center; margin-top: 28px; }
.home-guides h2 { font-size: .8rem; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 10px; }
.home-guides ul { list-style: none; margin: 0 auto; padding: 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 14px; max-width: 720px; }
.home-guides a { color: var(--muted); font-size: .9rem; text-decoration: none; }
.home-guides a:hover { color: var(--accent); text-decoration: underline; }

/* Cloud comparison: advantages */
.adv { margin-top: 6px; }
.adv summary { cursor: pointer; list-style: none; display: inline-flex; align-items: center; gap: 6px; color: var(--accent); font-size: .82rem; font-weight: 600; }
.adv summary::-webkit-details-marker { display: none; }
.adv summary::before { content: ""; width: 6px; height: 6px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: rotate(-45deg); transition: transform .2s; }
.adv[open] summary::before { transform: rotate(45deg); }
.adv-list { margin: 6px 0 0; padding-left: 18px; font-size: .88rem; color: var(--muted); }
.adv-list li { margin: 3px 0; }
.adv-list li::marker { color: var(--accent); }
#cloudTable.single .adv-list { margin-top: 0; color: var(--text); font-size: .9rem; }

/* Cloud comparison table: always fits its card, no sideways scrolling */
.table-card { container-type: inline-size; }
#cloudTable { table-layout: fixed; font-size: .9rem; }
#cloudTable th, #cloudTable td { padding: 12px 14px; overflow-wrap: anywhere; }
#cloudTable td:first-child { white-space: normal; width: auto; }
#cloudTable.wide th:first-child { width: 15%; }
#cloudTable.single th:first-child { width: 20%; }
#cloudTable.single th:nth-child(2) { width: 28%; }
#cloudTable.single td.svc { font-weight: 600; }
#cloudTable .adv-list { padding-left: 16px; }

/* Too narrow for side-by-side columns: one card per component, clouds stacked inside */
@container (max-width: 760px) {
  #cloudTable.wide, #cloudTable.wide tbody, #cloudTable.wide tr, #cloudTable.wide td { display: block; width: 100%; }
  #cloudTable.wide thead { display: none; }
  #cloudTable.wide tr { padding: 14px 18px; border-bottom: 1px solid var(--border); }
  #cloudTable.wide tr:last-child { border-bottom: none; }
  #cloudTable.wide td { border: none; padding: 6px 0; }
  #cloudTable.wide td:first-child { font-size: 1.02rem; font-weight: 700; padding-bottom: 4px; }
  #cloudTable.wide td[data-label]::before { content: attr(data-label); display: block; font-size: .75rem; font-weight: 700; color: var(--muted); letter-spacing: .02em; }
}
@container (max-width: 560px) {
  #cloudTable.single, #cloudTable.single tbody, #cloudTable.single tr, #cloudTable.single td { display: block; width: 100%; }
  #cloudTable.single thead { display: none; }
  #cloudTable.single tr { padding: 14px 18px; border-bottom: 1px solid var(--border); }
  #cloudTable.single tr:last-child { border-bottom: none; }
  #cloudTable.single td { border: none; padding: 4px 0; }
  #cloudTable.single td:first-child { font-size: 1.02rem; font-weight: 700; }
  #cloudTable.single td[data-label]::before { content: attr(data-label); display: block; font-size: .75rem; font-weight: 700; color: var(--muted); margin-bottom: 2px; }
}

/* Detect screen: clarifying questions */
.detect-main.asking { display: block; }
.ask-intro { margin: 0 0 14px; color: var(--muted); }
.choices { display: grid; gap: 10px; }
.choice {
  display: flex; gap: 14px; align-items: center; text-align: left; width: 100%; cursor: pointer; font: inherit;
  padding: 14px 18px; border-radius: var(--r); border: 1.5px solid var(--border); background: var(--surface); color: var(--text);
  transition: border-color .15s, background .15s;
}
.choice:hover { border-color: var(--accent); background: var(--accent-soft); }
.choice b { display: block; font-size: 1rem; }
.choice small { display: block; color: var(--muted); font-size: .85rem; margin-top: 2px; }
.choice-ic { flex: none; font-size: 1.6rem; width: 44px; height: 44px; display: grid; place-items: center; border-radius: 12px; background: var(--accent-soft); }

/* Share dialog */
.dialog { border: none; border-radius: var(--r-lg); padding: 28px; max-width: 560px; width: calc(100% - 32px); background: var(--surface); color: var(--text); box-shadow: 0 20px 60px rgba(0, 0, 0, .25); }
.dialog::backdrop { background: rgba(0, 0, 0, .4); }
.dialog h2 { font-size: 1.35rem; }
.check-row { display: flex; gap: 10px; align-items: center; margin: 14px 0; cursor: pointer; }
.check-row input { accent-color: var(--accent); width: 18px; height: 18px; }
.share-row { display: flex; gap: 8px; }
.share-row input { flex: 1; min-width: 0; padding: 10px 14px; border-radius: 999px; border: 1.5px solid var(--border-strong); background: var(--bg); color: var(--text); font: inherit; font-size: .85rem; }

/* Toast */
.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px); opacity: 0; pointer-events: none; z-index: 60;
  background: var(--text); color: var(--bg); padding: 10px 18px; border-radius: 999px; font-size: .92rem; transition: opacity .2s, transform .2s;
  max-width: calc(100% - 32px);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* Printable plan */
#printView { display: none; }
@media print {
  @page { margin: 16mm 14mm; }
  .shell, .tooltip, .toast, .dialog { display: none !important; }
  html, body { background: #fff !important; color: #111 !important; font-size: 11pt; }
  #printView { display: block; color: #111; line-height: 1.5; }
  #printView h1 { font-size: 20pt; margin: 0 0 6pt; }
  #printView h2 { font-size: 14pt; margin: 18pt 0 6pt; border-bottom: 1px solid #ccc; padding-bottom: 3pt; break-after: avoid; }
  #printView h3 { font-size: 11pt; margin: 10pt 0 4pt; break-after: avoid; }
  #printView ul { margin: 0 0 6pt; padding-left: 16pt; }
  #printView table { border-collapse: collapse; width: 100%; font-size: 10pt; }
  #printView th, #printView td { text-align: left; vertical-align: top; border-bottom: 1px solid #e5e5e5; padding: 4pt 6pt; }
  #printView th { width: 28%; }
  #printView pre { white-space: pre-wrap; word-break: break-word; font-size: 8.5pt; background: #f5f5f5; border: 1px solid #e0e0e0; border-radius: 4pt; padding: 8pt; break-inside: avoid; }
  #printView .pv-brand { color: #0f766e; font-weight: 700; margin: 0; }
  #printView .pv-req { font-style: italic; color: #444; }
  #printView .pv-simple { background: #e3f3ef; padding: 6pt 8pt; border-radius: 4pt; }
  #printView .pv-checks { list-style: none; padding-left: 0; }
  #printView .pv-tip { color: #444; }
  #printView .pv-step h2 { margin-top: 22pt; }
  #printView li, #printView tr { break-inside: avoid; }
  #printView .pv-foot { margin-top: 18pt; color: #777; font-size: 9pt; }
  #printView .term { border: none; }
}

/* No sidebar animation while the page restores its saved state. */
body.booting .sidebar { transition: none !important; }