/* ================================================================
   ScopeDue — page-feature.css
   Feature pages (Group 8: 4 pages under /features/)
   Replaces features.css. Premium demos, workflow, FAQ accordion.
   ================================================================ */

/* ── Section rhythm ─────────────────────────────────────────────── */
article > section { scroll-margin-top: calc(var(--nav-h) + 24px); }
article > section + section { padding-top: var(--s6); }

/* ── Hero enhancement ───────────────────────────────────────────── */
.hero { padding: clamp(3.5rem, 8vw, 6.5rem) clamp(2rem, 5vw, 4.5rem); }
.hero .hero-orb-amber {
  position: absolute; bottom: -80px; left: 25%;
  width: 360px; height: 360px;
  background: radial-gradient(circle, rgba(180,83,9,.05) 0%, transparent 70%);
  border-radius: 50%; pointer-events: none;
}

/* ── Trust strip (feature hero) ────────────────────────────────── */
.trust-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--s3);
  margin: var(--s6) 0 0;
  position: relative; z-index: 1;
}
.trust-strip > div {
  padding: var(--s3) var(--s4);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(8px);
  color: var(--text-body);
  font-family: var(--f-display);
  font-size: .875rem;
  font-weight: 700;
  display: flex; align-items: center; gap: .5rem;
  transition: border-color .2s, background .2s;
}
.trust-strip > div::before {
  content: '✓';
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--success-soft);
  border: 1px solid var(--success-border);
  color: var(--success);
  font-size: .6rem; font-weight: 900;
  display: grid; place-items: center; flex-shrink: 0;
}
.trust-strip > div:hover { border-color: var(--ink-border); background: var(--ink-soft); }

/* ── Feature bullet list ────────────────────────────────────────── */
.feature-list {
  list-style: none; padding: 0; margin: var(--s4) 0; display: grid; gap: .55rem;
}
.feature-list li {
  position: relative;
  padding: .85rem 1rem .85rem 2.75rem;
  border: 1px solid var(--border); border-radius: var(--r-sm);
  background: var(--surface); margin: 0; font-size: .94rem; line-height: 1.6;
  transition: border-color .2s, background .15s;
}
.feature-list li:hover { border-color: var(--ink-border); background: var(--ink-soft); }
.feature-list li::before {
  content: ''; position: absolute; left: 1rem; top: 1.1rem;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--ink); box-shadow: 0 0 0 3px var(--ink-soft);
}

/* ── Workflow demo (dark panel) ─────────────────────────────────── */
.workflow-demo {
  margin: var(--s7) 0;
  padding: clamp(2rem, 5vw, 3.5rem);
  background: var(--text);
  border-radius: var(--r-2xl);
  position: relative; overflow: hidden; box-shadow: var(--sh-lg);
}
.workflow-demo::before {
  content: ''; position: absolute; top: -150px; right: -150px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(79,70,229,.2), transparent 60%);
  border-radius: 50%; pointer-events: none;
}
.workflow-demo::after {
  content: ''; position: absolute; bottom: -100px; left: 10%;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(180,83,9,.12), transparent 60%);
  border-radius: 50%; pointer-events: none;
}
.workflow-demo > * { position: relative; z-index: 1; }
.workflow-demo h2 { color: #fff; margin-top: 0; }
.workflow-demo .section-kicker { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.15); color: rgba(255,255,255,.6); }
.workflow-demo .grid.three { gap: var(--s4); }
.workflow-demo .card { background: rgba(255,255,255,.07); border-color: rgba(255,255,255,.1); color: rgba(255,255,255,.75); transition: background .2s; }
.workflow-demo .card:hover { background: rgba(255,255,255,.11); transform: translateY(-3px); }
.workflow-demo .card h3 { color: rgba(255,255,255,.9); }
.workflow-demo .card p, .workflow-demo .card ol, .workflow-demo .card ul { color: rgba(255,255,255,.55); }
.workflow-demo .card li { margin-bottom: .35rem; font-size: .9rem; }
.workflow-demo .step-list li, .workflow-demo .callout-list li,
.workflow-demo .related-links li, .workflow-demo .resource-list li { color: var(--text-body); }
.workflow-demo .button { background: #fff; color: var(--text); border-color: #fff; }
.workflow-demo .button:hover { background: #eaeaf2; }
.workflow-demo .button::after { display: none; }
.workflow-demo .button.secondary { background: rgba(255,255,255,.08); color: rgba(255,255,255,.8); border-color: rgba(255,255,255,.2); }
.workflow-demo .button.secondary:hover { background: rgba(255,255,255,.14); color: #fff; }
.workflow-demo .button-row { margin-top: var(--s5); }

/* ── Approval link demo ─────────────────────────────────────────── */
.approval-link-demo {
  border: 1px solid var(--border-strong); border-radius: var(--r-xl);
  background: var(--surface); box-shadow: var(--sh-lg); overflow: hidden; margin: var(--s5) 0;
}
.approval-link-demo .demo-top {
  padding: .7rem 1rem; background: var(--bg-tint); border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: .4rem;
}
.approval-link-demo .demo-top::before {
  content: '● ● ●'; font-size: .5rem; letter-spacing: .25rem; color: var(--border-strong); flex-shrink: 0;
}
.approval-link-demo .demo-top p,
.approval-link-demo .demo-top h3 { color: var(--text); margin: 0; }
.approval-link-demo .demo-top p.small { color: var(--text-muted); font-size: .78rem; }
.approval-link-demo .demo-top h3 { font-size: .96rem; }
.approval-link-demo .demo-body { padding: var(--s5); }
.approval-link-demo .definition-list { margin-top: var(--s3); }
.approval-link-demo .definition-list div {
  background: var(--bg-tint); border-color: var(--border-subtle);
  border-radius: var(--r-sm); padding: .65rem .9rem;
}

/* ── Proof pack demo ────────────────────────────────────────────── */
.proof-pack-demo { border: 1px solid var(--border); border-radius: var(--r-xl); background: var(--surface); box-shadow: var(--sh-sm); overflow: hidden; margin: var(--s5) 0; }

/* ── Handoff lock ───────────────────────────────────────────────── */
.handoff-lock { border: 1px solid var(--border); border-radius: var(--r-xl); background: var(--surface); box-shadow: var(--sh-sm); padding: var(--s5); margin: var(--s5) 0; }

/* ── Payment ledger ─────────────────────────────────────────────── */
.payment-ledger { border: 1px solid var(--border); border-radius: var(--r-xl); background: var(--surface); box-shadow: var(--sh-sm); padding: var(--s5); margin: var(--s5) 0; }

/* ── Form preview ───────────────────────────────────────────────── */
.form-preview { border: 1px solid var(--border); border-radius: var(--r-xl); background: var(--surface); box-shadow: var(--sh-sm); padding: var(--s5); margin: var(--s5) 0; }

/* ── Dark template/copy blocks ──────────────────────────────────── */
.template-box, .copy-block, .output-preview {
  border: 1px solid var(--border); border-radius: var(--r-lg);
  background: #0f172a; color: #e2e8f0; padding: var(--s5);
  overflow-x: auto;
  font-family: 'Cascadia Code', 'Fira Mono', 'SF Mono', ui-monospace, monospace;
  font-size: .875rem; line-height: 1.75; position: relative;
  margin: var(--s4) 0; max-width: 100%; overflow-wrap: anywhere;
}
.template-box pre, .template-box code,
.copy-block pre, .copy-block code,
.output-preview pre, .output-preview code {
  display: block; max-width: 100%; margin: 0;
  white-space: pre-wrap; overflow-wrap: anywhere; word-break: break-word;
}
.template-box::before {
  content: 'Template'; position: absolute; top: .75rem; right: .75rem;
  padding: .15rem .55rem; border-radius: var(--r-xs);
  background: rgba(255,255,255,.08); color: rgba(255,255,255,.4);
  font-size: .68rem; font-weight: 700; font-family: var(--f-display);
  letter-spacing: .08em; text-transform: uppercase;
}
.template-box strong, .copy-block strong, .output-preview strong { color: #fff; }
.template-box p, .copy-block p { margin-bottom: var(--s3); color: #cbd5e1; }
.template-box p:last-child, .copy-block p:last-child { margin-bottom: 0; }

/* ── Feature cards ──────────────────────────────────────────────── */
.feature-card {
  display: grid; grid-template-columns: 1.1fr 0.9fr;
  gap: var(--s5); padding: var(--s5);
  border: 1px solid var(--border); border-radius: var(--r-xl);
  background: var(--surface); box-shadow: var(--sh-xs);
  margin: var(--s4) 0;
  transition: border-color .2s, box-shadow .2s, transform .18s;
  position: relative; overflow: hidden;
}
.feature-card::after {
  content: ''; position: absolute; inset: 0; border-radius: inherit;
  border: 1.5px solid var(--ink-border); opacity: 0; transition: opacity .2s; pointer-events: none;
}
.feature-card:hover { box-shadow: var(--sh-sm); transform: translateY(-3px); }
.feature-card:hover::after { opacity: 1; }
.feature-card h3 { margin-top: var(--s3); font-size: 1.1rem; }
.feature-card > div:first-child { padding-right: var(--s4); border-right: 1px solid var(--border); }
.feature-card > div:last-child  { padding-left: var(--s2); }

.card-link {
  display: inline-flex; align-items: center; gap: .3rem;
  margin-top: var(--s3); font-size: .84rem; font-weight: 700;
  color: var(--ink); text-decoration: none;
}
.card-link::after { content: '→'; transition: transform .15s; }
.card-link:hover { text-decoration: none; color: var(--ink-dark); }
.card-link:hover::after { transform: translateX(3px); }

/* ── Split layout with sticky sidebar ──────────────────────────── */
.split {
  display: grid; grid-template-columns: 1.1fr 0.9fr;
  gap: var(--s6); align-items: start; margin: var(--s6) 0;
}
.split aside { position: sticky; top: calc(var(--nav-h) + 24px); }

/* ── Timeline on feature pages ──────────────────────────────────── */
.timeline { position: relative; display: grid; gap: .5rem; margin: var(--s4) 0; }
.timeline > div {
  position: relative; padding: .875rem 1rem .875rem 2.75rem;
  border: 1px solid var(--border); border-radius: var(--r-sm);
  background: var(--surface); transition: border-color .2s;
}
.timeline > div:hover { border-color: var(--ink-border); }
.timeline > div::before {
  content: ''; position: absolute; left: 1rem; top: 1.15rem;
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--ink); border: 2px solid var(--surface);
  box-shadow: 0 0 0 2px var(--ink-border); z-index: 1;
}
.timeline > div::after {
  content: ''; position: absolute; left: 1.44rem; top: 2.2rem;
  bottom: -1.05rem; width: 1px; background: var(--border); z-index: 0;
}
.timeline > div:last-child::after { display: none; }
.timeline > div strong { color: var(--text); font-size: .93rem; }
.timeline > div p.small { margin: .25rem 0 0; }

/* ── FAQ accordion ──────────────────────────────────────────────── */
details {
  border: 1px solid var(--border); border-radius: var(--r-lg);
  background: var(--surface); margin: .5rem 0; overflow: hidden; transition: border-color .2s;
}
details:hover, details[open] { border-color: var(--ink-border); }
summary {
  cursor: pointer; padding: var(--s4) var(--s5);
  font-family: var(--f-display); font-weight: 700; font-size: .94rem; color: var(--text);
  list-style: none; display: flex; align-items: center; justify-content: space-between; user-select: none;
}
summary::-webkit-details-marker { display: none; }
summary::after {
  content: '+'; width: 24px; height: 24px; border-radius: 50%;
  background: var(--bg-tint); border: 1px solid var(--border);
  display: grid; place-items: center; font-size: .88rem; color: var(--text-muted);
  flex-shrink: 0; transition: background .2s, transform .25s;
}
details[open] summary::after {
  content: '+'; background: var(--ink-soft); border-color: var(--ink-border); color: var(--ink); transform: rotate(45deg);
}
details > *:not(summary) { padding: 0 var(--s5) var(--s4); color: var(--text-muted); font-size: .9rem; line-height: 1.7; }
details > p { margin-top: 0; }

/* ── Responsive ─────────────────────────────────────────────────── */
@media (max-width: 860px) {
  .split { grid-template-columns: 1fr; }
  .split aside { position: static; }
  .feature-card { grid-template-columns: 1fr; }
  .feature-card > div:first-child { padding-right: 0; border-right: none; border-bottom: 1px solid var(--border); padding-bottom: var(--s4); }
  .feature-card > div:last-child { padding-left: 0; }
  .trust-strip { grid-template-columns: repeat(2, 1fr); }
  .workflow-demo { border-radius: var(--r-xl); padding: var(--s5); }
}
@media (max-width: 560px) {
  .trust-strip { grid-template-columns: 1fr; }
  .feature-card { padding: var(--s4); }
  .template-box { font-size: .82rem; }
}