/* Centa website. Same tokens as the app: off-white ground, ink, one accent for state. */
:root {
  --ground: #F2F2F0; --surface: #FFFFFF; --muted-surface: #EAEAE7; --ink: #0E0E0E; --ink-to: #2A2A2A;
  --text: #0E0E0E; --text-muted: #75756F; --text-faint: #A7A7A1; --border: #E3E3DF; --sunny: #1E9E5A; --tight: #D9342B;
  --radius: 24px; --radius-sm: 16px; --measure: 62ch;
  --display: 'Archivo Black', Inter, system-ui, sans-serif; --body: Inter, system-ui, -apple-system, 'Segoe UI', sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --ground: #0B0B0B; --surface: #161616; --muted-surface: #202020; --ink: #F5F5F3; --ink-to: #D9D9D5; --text: #F5F5F3; --text-muted: #9A9A94; --text-faint: #5E5E5A; --border: #262626; --sunny: #3DC27A; --tight: #F05A4F; }
}
:root[data-theme="dark"] { --ground: #0B0B0B; --surface: #161616; --muted-surface: #202020; --ink: #F5F5F3; --ink-to: #D9D9D5; --text: #F5F5F3; --text-muted: #9A9A94; --text-faint: #5E5E5A; --border: #262626; --sunny: #3DC27A; --tight: #F05A4F; }

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation: none !important; transition: none !important; } }
body { margin: 0; background: var(--ground); color: var(--text); font-family: var(--body); font-size: 16px; line-height: 1.6; }
img, svg { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--text); outline-offset: 3px; border-radius: 4px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

h1, h2, h3 { font-family: var(--display); font-weight: 400; letter-spacing: -0.02em; line-height: 1.05; margin: 0; text-wrap: balance; }
h1 { font-size: clamp(38px, 7vw, 76px); }
h2 { font-size: clamp(26px, 4vw, 40px); }
h3 { font-size: 20px; line-height: 1.2; }
p { margin: 0; }
.muted { color: var(--text-muted); }
.eyebrow { font-size: 11px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); }
.num { font-weight: 800; font-variant-numeric: tabular-nums; letter-spacing: -0.03em; }

.wrap { width: min(1120px, 100% - 48px); margin-inline: auto; }
@media (max-width: 640px) { .wrap { width: min(1120px, 100% - 32px); } }

/* header */
.site-header { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--ground) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.wordmark { font-family: var(--display); font-size: 22px; text-decoration: none; display: inline-flex; align-items: center; gap: 10px; }
.wordmark svg { width: 30px; height: 30px; }
.nav { display: flex; gap: 20px; font-size: 14px; font-weight: 500; }
.nav a { text-decoration: none; color: var(--text-muted); }
.nav a[aria-current="page"], .nav a:hover { color: var(--text); }
@media (max-width: 640px) { .nav { display: none; } }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: 999px; padding: 14px 22px; font-weight: 600; font-size: 15px; text-decoration: none; border: 0; cursor: pointer; font-family: var(--body); transition: opacity .15s ease, transform .15s ease; }
.btn:active { transform: scale(.98); }
.btn-primary { background: var(--ink); color: var(--ground); }
.btn-secondary { background: var(--surface); color: var(--text); box-shadow: 0 8px 20px rgba(0,0,0,.08); }
.btn-ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn[aria-disabled="true"], .btn:disabled { opacity: .45; cursor: not-allowed; }
.btn .spinner { width: 14px; height: 14px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: spin .7s linear infinite; display: none; }
.btn.is-loading .spinner { display: inline-block; }
.btn.is-loading .label { opacity: .7; }
@keyframes spin { to { transform: rotate(360deg); } }

/* hero */
.hero { padding: clamp(48px, 9vw, 112px) 0 clamp(40px, 6vw, 80px); display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: clamp(32px, 6vw, 80px); align-items: center; }
@media (max-width: 860px) { .hero { grid-template-columns: 1fr; } }
.hero h1 .dim { color: var(--text-faint); }
.hero .lede { font-size: 18px; max-width: 46ch; color: var(--text-muted); margin-top: 20px; }
.hero .cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero .note { margin-top: 14px; font-size: 13px; color: var(--text-faint); }

/* widget mock */
.mock { justify-self: center; width: min(380px, 100%); display: grid; gap: 14px; }
.card { background: var(--surface); border-radius: var(--radius); padding: 22px; box-shadow: 0 10px 28px rgba(0,0,0,.05); }
.ink { background: linear-gradient(135deg, var(--ink), var(--ink-to)); color: var(--ground); }
.ink .eyebrow { color: color-mix(in srgb, var(--ground) 60%, transparent); }
.ink .muted { color: color-mix(in srgb, var(--ground) 62%, transparent); }
.mock .big { font-size: 44px; line-height: 1; margin: 8px 0 12px; }
.strip { display: flex; gap: 5px; align-items: center; margin: 10px 0; }
.strip i { width: 6px; height: 6px; border-radius: 50%; background: color-mix(in srgb, var(--ground) 32%, transparent); }
.strip i.past { background: var(--ground); }
.strip i.today { width: 9px; height: 9px; background: var(--ground); }
.pills { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 14px; }
.pill { border-radius: 999px; padding: 10px 14px; background: color-mix(in srgb, var(--ground) 16%, transparent); font-size: 14px; }
.pill b { display: block; font-weight: 600; }
.pill span { color: color-mix(in srgb, var(--ground) 62%, transparent); font-size: 12px; }
.card.paper .pill { background: var(--muted-surface); }
.card.paper .pill span { color: var(--text-muted); }
.dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--sunny); margin-right: 8px; vertical-align: middle; }

/* sections */
.section { padding: clamp(40px, 7vw, 88px) 0; border-top: 1px solid var(--border); }
.section .head { max-width: 60ch; margin-bottom: 32px; }
.section .head p { margin-top: 12px; color: var(--text-muted); }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.feature { padding: 24px; }
.feature .icon { width: 40px; height: 40px; border-radius: 50%; background: var(--muted-surface); display: grid; place-items: center; margin-bottom: 16px; }
.feature .icon svg { width: 18px; height: 18px; stroke: var(--text); fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.feature h3 { margin-bottom: 8px; }
.feature p { color: var(--text-muted); font-size: 15px; }
.steps { counter-reset: step; display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.step { padding: 22px; }
.step .k { font-family: var(--display); font-size: 28px; color: var(--text-faint); margin-bottom: 10px; }
.pledge { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.pledge .item b { display: block; font-weight: 600; margin-bottom: 4px; }
.pledge .item span { color: var(--text-muted); font-size: 15px; }
.faq details { border-top: 1px solid var(--border); padding: 16px 0; }
.faq details:last-child { border-bottom: 1px solid var(--border); }
.faq summary { cursor: pointer; font-weight: 600; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq summary::after { content: '+'; font-weight: 400; color: var(--text-muted); }
.faq details[open] summary::after { content: '−'; }
.faq p { margin-top: 10px; color: var(--text-muted); max-width: var(--measure); }

/* documents (privacy, terms) */
.doc { padding: clamp(40px, 7vw, 80px) 0; }
.doc .wrap { max-width: 760px; }
.doc h1 { font-size: clamp(32px, 5vw, 48px); }
.doc .meta { margin: 12px 0 32px; color: var(--text-muted); font-size: 14px; }
.doc h2 { font-size: 22px; margin: 40px 0 12px; }
.doc h3 { font-size: 17px; font-family: var(--body); font-weight: 600; margin: 24px 0 8px; }
.doc p, .doc li { max-width: var(--measure); color: var(--text); }
.doc p + p { margin-top: 12px; }
.doc ul { padding-left: 20px; margin: 12px 0; }
.doc li + li { margin-top: 6px; }
.doc .summary { background: var(--surface); border-radius: var(--radius); padding: 22px 24px; box-shadow: 0 10px 28px rgba(0,0,0,.05); margin-bottom: 32px; }
.doc .summary b { display: block; margin-bottom: 8px; }
.doc table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 12px 0; }
.doc th, .doc td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
.doc th { font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: var(--text-muted); font-weight: 600; }
.table-wrap { overflow-x: auto; }
.doc address { font-style: normal; }

/* forms */
.form { display: grid; gap: 16px; max-width: 560px; }
.field { display: grid; gap: 6px; }
.field label { font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--text-muted); }
.field input, .field textarea, .field select { width: 100%; font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 12px 14px; }
.field textarea { min-height: 140px; resize: vertical; }
.field.has-error input, .field.has-error textarea { border-color: var(--tight); }
.field .error { color: var(--tight); font-size: 13px; display: none; }
.field.has-error .error { display: block; }
.form .status { font-size: 14px; color: var(--text-muted); min-height: 1.4em; }
.form .status.is-error { color: var(--tight); }

/* footer */
.site-footer { border-top: 1px solid var(--border); padding: 40px 0 120px; font-size: 14px; color: var(--text-muted); }
.site-footer .wrap { display: grid; gap: 24px; grid-template-columns: 1.4fr 1fr 1fr; }
@media (max-width: 720px) { .site-footer .wrap { grid-template-columns: 1fr; } }
.site-footer nav { display: grid; gap: 8px; }
.site-footer a { text-decoration: none; }
.site-footer a:hover { color: var(--text); }
.site-footer address { font-style: normal; margin-top: 8px; }

/* sticky mobile CTA */
.sticky-cta { position: fixed; left: 16px; right: 16px; bottom: 16px; z-index: 30; display: none; }
.sticky-cta .btn { width: 100%; box-shadow: 0 12px 30px rgba(0,0,0,.18); }
@media (max-width: 640px) { .sticky-cta { display: block; } }

/* cookie / analytics notice */
.notice { position: fixed; left: 16px; right: 16px; bottom: 84px; z-index: 40; background: var(--surface); border-radius: 18px; padding: 16px 18px; box-shadow: 0 16px 40px rgba(0,0,0,.14); display: none; gap: 12px; align-items: center; font-size: 14px; }
.notice.is-visible { display: flex; }
.notice p { flex: 1; color: var(--text-muted); }
@media (min-width: 641px) { .notice { left: auto; bottom: 16px; max-width: 460px; } }

/* 404 / thanks */
.center { min-height: 60vh; display: grid; place-items: center; text-align: center; padding: 48px 0; }
.center .big { font-family: var(--display); font-size: clamp(64px, 18vw, 160px); line-height: 1; color: var(--text-faint); }