/* ChangeGist design system */
:root {
  --bg: #f6f6fb; --bg-soft: #eeeef8; --card: #ffffff; --text: #0f1222; --muted: #5f6478; --border: #e4e5ef;
  --accent: #5b4cf0; --accent-2: #a855f7; --accent-soft: #eeebff; --accent-text: #fff;
  --ok: #16a34a; --ok-soft: #e8f7ee; --warn: #d97706; --danger: #dc2626; --err-bg: #fdecec; --note-bg: #eef0ff;
  --add: #e7f6ec; --add-text: #166534; --del: #fdecec; --del-text: #991b1b;
  --shadow: 0 1px 2px rgba(16,18,40,.04), 0 4px 16px rgba(16,18,40,.06);
  --shadow-lg: 0 10px 40px rgba(40,30,120,.18);
  --radius: 14px;
  --grad: linear-gradient(135deg, #4f46e5 0%, #6d5dfc 45%, #a855f7 100%);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0e17; --bg-soft: #141625; --card: #161827; --text: #eceef7; --muted: #9ba0b8; --border: #262940;
    --accent: #8b7dff; --accent-soft: #221f45; --accent-text: #0d0e17;
    --ok-soft: #12291c; --err-bg: #3a1717; --note-bg: #1c1f3a;
    --add: #10291a; --add-text: #86efac; --del: #331416; --del-text: #fca5a5;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 4px 16px rgba(0,0,0,.25);
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font: 16px/1.6 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg); color: var(--text); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.15; margin: 0 0 .5em; letter-spacing: -0.02em; font-weight: 750; }
h1 { font-size: clamp(28px, 4vw, 40px); }
h2 { font-size: clamp(22px, 3vw, 30px); }
h3 { font-size: 18px; font-weight: 700; letter-spacing: -0.01em; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .9em; background: var(--bg-soft); padding: 1px 6px; border-radius: 6px; }
.icon { flex-shrink: 0; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
main.wrap { padding-top: 28px; padding-bottom: 64px; }
.hero-band + main.wrap { padding-top: 72px; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.center { text-align: center; }
.right { text-align: right; white-space: nowrap; }
.right-align { text-align: right; margin: 6px 0 0; }
.truncate { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 100%; }

/* nav */
.nav { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--card) 82%, transparent);
  backdrop-filter: saturate(1.6) blur(12px); border-bottom: 1px solid var(--border); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.nav nav { display: flex; gap: 18px; align-items: center; }
.nav nav a:not(.btn) { color: var(--muted); font-weight: 550; font-size: 15px; }
.nav nav a:not(.btn):hover { color: var(--text); text-decoration: none; }
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; color: var(--text); letter-spacing: -0.02em; }
.logo:hover { text-decoration: none; }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; background: var(--accent); color: #fff;
  border: 0; border-radius: 10px; padding: 11px 20px; font: inherit; font-weight: 650; cursor: pointer;
  box-shadow: 0 1px 2px rgba(0,0,0,.08), 0 4px 14px color-mix(in srgb, var(--accent) 35%, transparent); transition: transform .12s, filter .12s; }
.btn:hover { filter: brightness(1.07); text-decoration: none; transform: translateY(-1px); }
.btn-sm { padding: 7px 14px; font-size: 14px; }
.btn-lg { padding: 14px 26px; font-size: 17px; border-radius: 12px; }
.btn-ghost { background: var(--card); color: var(--text); border: 1px solid var(--border); box-shadow: none; }
.btn-white { background: #fff; color: #3b2fd1; box-shadow: 0 6px 20px rgba(20,10,80,.25); }
.btn-outline-white { background: rgba(255,255,255,.08); color: #fff; border: 1px solid rgba(255,255,255,.4); box-shadow: none; }
.btn-danger { background: transparent; color: var(--danger); border: 1px solid var(--border); box-shadow: none; }
button.link { background: none; border: 0; color: var(--muted); font: inherit; font-weight: 550; font-size: 15px; cursor: pointer; padding: 0; }
form.inline { display: inline; }

/* cards & forms */
.card { display: block; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; margin-bottom: 16px; color: var(--text); box-shadow: var(--shadow); }
.narrow { max-width: 440px; margin: 48px auto; }
.row-link { display: flex; justify-content: space-between; gap: 12px; align-items: center; padding: 14px 16px; transition: border-color .15s, transform .15s; }
.row-link:hover { border-color: var(--accent); text-decoration: none; transform: translateY(-1px); }
.row-link > div:first-child { min-width: 0; }
input, select { width: 100%; padding: 11px 13px; border: 1px solid var(--border); border-radius: 10px; background: var(--bg);
  color: var(--text); font: inherit; margin-top: 6px; transition: border-color .15s, box-shadow .15s; }
input:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
label { display: block; font-weight: 600; font-size: 15px; }
label.check { display: flex; gap: 8px; align-items: baseline; font-weight: 400; margin-top: 10px; }
label.check input { width: auto; margin: 0; }
.stack > * + * { margin-top: 14px; }
.grid-form { display: grid; grid-template-columns: 2fr 1.2fr 1fr auto; gap: 12px; align-items: end; }
.grid-form .span2 { grid-column: 1 / -1; }
.error { background: var(--err-bg); color: var(--danger); padding: 11px 14px; border-radius: 10px; }
.notice { background: var(--note-bg); padding: 11px 14px; border-radius: 10px; }
.tag { display: inline-block; font-size: 12px; border: 1px solid var(--border); border-radius: 999px; padding: 1px 9px;
  margin-left: 6px; color: var(--muted); font-weight: 600; vertical-align: middle; }
.tag-err { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 35%, transparent); }
.badge { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 650; padding: 5px 12px;
  border-radius: 999px; background: rgba(255,255,255,.14); color: #fff; border: 1px solid rgba(255,255,255,.25); }
.verify-banner, .trial-banner { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.danger-zone { margin-top: 40px; border-color: color-mix(in srgb, var(--danger) 40%, var(--border)); }
.qr svg { width: 200px; height: 200px; background: #fff; border-radius: 10px; }

/* ---------- marketing ---------- */
section { margin-bottom: 72px; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 32px; }
.eyebrow { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--accent); margin-bottom: 8px; }
.lead { font-size: 19px; color: var(--muted); max-width: 640px; margin: 0 auto 24px; }

.hero-band { background: var(--grad); color: #fff; margin: 0; padding: 72px 0 84px; position: relative; overflow: hidden; }
.hero-band::before { content: ""; position: absolute; inset: 0;
  background: radial-gradient(600px 300px at 85% 10%, rgba(255,255,255,.18), transparent 60%),
              radial-gradient(500px 300px at 0% 100%, rgba(0,0,0,.18), transparent 60%); pointer-events: none; }
.hero-grid { position: relative; display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; }
.hero-band h1 { font-size: clamp(38px, 5.4vw, 60px); line-height: 1.04; letter-spacing: -0.035em; font-weight: 820; margin: 18px 0; color: #fff; }
.hero-band .lead { color: rgba(255,255,255,.88); margin: 0 0 28px; }
.hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; }
.trust { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 22px; font-size: 14px; color: rgba(255,255,255,.85); }
.trust span { display: inline-flex; align-items: center; gap: 6px; }

.demo { position: relative; }
.demo-diff, .demo-mail { background: var(--card); color: var(--text); border-radius: 16px; box-shadow: var(--shadow-lg); }
.demo-diff { padding: 14px 16px; font: 13px/1.6 ui-monospace, SFMono-Regular, Menlo, monospace; transform: rotate(-2deg); opacity: .96; }
.demo-diff .bar { display: flex; gap: 6px; align-items: center; margin-bottom: 10px; font-family: inherit; color: var(--muted); font-size: 12px; }
.demo-diff .dot { width: 9px; height: 9px; border-radius: 50%; background: #e5e7eb; }
.ln { padding: 1px 8px; border-radius: 5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ln.add { background: var(--add); color: var(--add-text); }
.ln.del { background: var(--del); color: var(--del-text); }
.ln.noise { opacity: .55; }
.demo-arrow { display: flex; justify-content: center; margin: -6px 0; position: relative; z-index: 2; }
.demo-arrow span { background: #fff; color: #4f46e5; border-radius: 999px; padding: 6px 14px; font-size: 13px; font-weight: 700;
  box-shadow: 0 6px 18px rgba(20,10,80,.25); display: inline-flex; gap: 6px; align-items: center; }
.demo-mail { padding: 18px 20px; margin-left: 28px; animation: rise .8s ease-out both .2s; }
.demo-mail .from { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); margin-bottom: 8px; }
.demo-mail .subject { font-weight: 750; font-size: 17px; margin-bottom: 8px; letter-spacing: -0.01em; }
.demo-mail ul { margin: 0 0 10px; padding-left: 18px; font-size: 15px; }
.demo-mail .ignored { font-size: 12.5px; color: var(--muted); display: inline-flex; gap: 6px; align-items: center;
  background: var(--bg-soft); border-radius: 999px; padding: 3px 10px; }
@keyframes rise { from { transform: translateY(14px); } to { transform: none; } }
@media (prefers-reduced-motion: reduce) { .demo-mail { animation: none; } .btn:hover, .row-link:hover { transform: none; } }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.step { position: relative; padding-top: 26px; }
.step-num { position: absolute; top: -14px; left: 22px; width: 32px; height: 32px; border-radius: 10px; background: var(--grad);
  color: #fff; font-weight: 800; display: grid; place-items: center; box-shadow: 0 6px 16px rgba(79,70,229,.35); }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature .ico, .usecase .ico { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent); margin-bottom: 14px; }
.feature p, .usecase p { margin: 0; color: var(--muted); }

.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; align-items: stretch; }
.compare .card { margin: 0; }
.compare h3 { display: flex; align-items: center; gap: 8px; }
.compare .raw { font: 13px/1.7 ui-monospace, SFMono-Regular, Menlo, monospace; }
.compare .label { font-size: 12px; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; }
.compare .good { border: 2px solid var(--accent); }

.usecases { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.usecases .row-link { margin: 0; align-items: flex-start; justify-content: flex-start; gap: 14px; padding: 20px; }
.usecases .row-link .ico { margin: 0; }
.usecases h3 { margin-bottom: 4px; }

.pricing { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; max-width: 980px; margin: 0 auto; align-items: stretch; }
.plan { display: flex; flex-direction: column; text-align: left; padding: 26px; position: relative; }
.plan h3 { font-size: 20px; }
.price { font-size: 42px; font-weight: 820; margin: 2px 0 6px; letter-spacing: -0.03em; }
.plan-list { list-style: none; padding: 0; margin: 12px 0 24px; }
.plan-list li { padding: 7px 0 7px 26px; font-size: 15px; position: relative; }
.plan-list li::before { content: ""; position: absolute; left: 0; top: 12px; width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235b4cf0' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 12.5l4 4L18 8'/%3E%3C/svg%3E") center/11px no-repeat; }
.plan .btn, .plan form { margin-top: auto; width: 100%; }
.plan form .btn { width: 100%; }
.plan-featured { border: 2px solid var(--accent); box-shadow: 0 14px 40px color-mix(in srgb, var(--accent) 22%, transparent); transform: translateY(-6px); }
.popular { position: absolute; top: -13px; left: 50%; transform: translateX(-50%); background: var(--grad); color: #fff;
  font-size: 12px; font-weight: 750; padding: 4px 12px; border-radius: 999px; white-space: nowrap; }

.narrow-section { max-width: 760px; margin-left: auto; margin-right: auto; }
.faq details { padding: 0; margin-bottom: 10px; }
.faq summary { cursor: pointer; padding: 17px 22px; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary h3 { display: inline; font-size: 17px; margin: 0; }
.faq summary::after { content: "+"; float: right; color: var(--muted); font-size: 22px; line-height: 1; }
.faq details[open] summary::after { content: "\2212"; }
.faq details p { margin: 0; padding: 0 22px 18px; color: var(--muted); }

.cta-band { background: var(--grad); color: #fff; border-radius: 22px; padding: 52px 28px; text-align: center; position: relative; overflow: hidden; }
.cta-band h2 { color: #fff; font-size: clamp(26px, 3.4vw, 36px); }
.cta-band p { color: rgba(255,255,255,.85); margin: 0 0 22px; }

/* older marketing classes still used by SEO pages */
.hero { text-align: center; padding: 40px 0 28px; }
.hero h1 { font-size: clamp(32px, 5vw, 50px); letter-spacing: -0.03em; font-weight: 820; }
.hero-left { text-align: left; padding: 24px 0 16px; }
.hero-left .lead { margin-left: 0; }
.crumbs { margin-top: 4px; }
.example { max-width: 600px; margin: 0 auto 40px; border-left: 4px solid var(--accent); }
.gist-headline { font-size: 19px; font-weight: 750; margin: 0 0 4px; }
.example ul { margin: 8px 0 0; padding-left: 20px; }
.prose { max-width: 720px; margin: 0 auto 48px; font-size: 17px; }
.prose h2 { margin-top: 36px; }
.cta { padding: 40px 20px; }
.legal { margin-top: 24px; }
.legal li { margin-bottom: 6px; }

/* ---------- app ---------- */
.page-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.page-head h1 { margin: 0; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 20px; }
.stats .card { margin: 0; padding: 18px; }
.stat-label { font-size: 13px; color: var(--muted); font-weight: 600; }
.stat { font-size: 28px; font-weight: 800; margin: 2px 0 0; letter-spacing: -0.02em; }
.add-card h2 { font-size: 18px; display: flex; align-items: center; gap: 8px; }
.cols { display: grid; grid-template-columns: 1fr 1.1fr; gap: 24px; margin-top: 24px; }
.cols h2 { font-size: 20px; }
.status { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; display: inline-block; }
.status.ok { background: var(--ok); box-shadow: 0 0 0 4px var(--ok-soft); }
.status.err { background: var(--danger); box-shadow: 0 0 0 4px var(--err-bg); }
.status.off { background: var(--muted); opacity: .5; }
.monitor-row { display: flex; align-items: center; gap: 14px; }
.avatar { width: 36px; height: 36px; border-radius: 10px; background: var(--accent-soft); color: var(--accent); font-weight: 800;
  display: grid; place-items: center; flex-shrink: 0; text-transform: uppercase; }
.timeline { position: relative; padding-left: 22px; }
.timeline::before { content: ""; position: absolute; left: 6px; top: 8px; bottom: 8px; width: 2px; background: var(--border); }
.timeline .item { position: relative; }
.timeline .item::before { content: ""; position: absolute; left: -21px; top: 21px; width: 12px; height: 12px; border-radius: 50%;
  background: var(--card); border: 3px solid var(--accent); }
.empty { text-align: center; padding: 34px 20px; color: var(--muted); border: 2px dashed var(--border); border-radius: var(--radius); }
.head-row { display: flex; justify-content: space-between; gap: 12px; align-items: flex-start; flex-wrap: wrap; }
.head-row > div:first-child { min-width: 0; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.change ul { margin: 10px 0; padding-left: 20px; }
.change.minor { opacity: .6; }
pre.diff { overflow-x: auto; font-size: 13px; background: var(--bg-soft); padding: 12px; border-radius: 10px; white-space: pre-wrap; word-break: break-word; }

.admin-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
table.admin { width: 100%; border-collapse: collapse; font-size: 14px; }
table.admin th, table.admin td { text-align: left; padding: 8px; border-bottom: 1px solid var(--border); }

/* footer */
.site-footer { border-top: 1px solid var(--border); background: var(--card); padding-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1.5fr 1fr; gap: 24px; }
.footer-grid a { display: block; color: var(--muted); font-size: 14px; padding: 3px 0; }
.footer-head { font-weight: 700; margin: 0 0 6px; }
.site-footer > p { padding: 20px 20px 36px; }

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .demo { max-width: 520px; }
  .feature-grid, .steps { grid-template-columns: 1fr 1fr; }
  .grid-form { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  .feature-grid, .steps, .compare, .usecases, .pricing, .cols, .footer-grid { grid-template-columns: 1fr; }
  .stats, .admin-grid, .grid-form { grid-template-columns: 1fr 1fr; }
  .grid-form > * { grid-column: 1 / -1; }
  .plan-featured { transform: none; }
  .nav .muted { display: none; }
  .nav nav { gap: 12px; }
  .hero-band { padding: 48px 0 60px; }
  .demo-mail { margin-left: 0; }
  section { margin-bottom: 52px; }
}

/* wordmark */
.wordmark { display: inline-flex; align-items: center; gap: 10px; font-weight: 820; letter-spacing: -0.035em; }
.gist-grad { background: linear-gradient(120deg, #6366f1, #a855f7 55%, #ec4899); -webkit-background-clip: text; background-clip: text; color: transparent; }