/* Vaultin site styles. Light paper bands for explaining, deep navy bands for the promises. */
:root {
  --bg: #F5F7FA;
  --surface: #FCFDFE;
  --ink: #0F1B3D;
  --muted: #4F5B73;
  --line: #DCE2EC;
  --accent: #1F6FEB;
  --accent-ink: #1A52C4;
  --accent-soft: #E4EEFD;
  --night: #0F1B3D;
  --night-2: #1A2A55;
  --night-line: #2A3B6B;
  --on-night: #F5F7FA;
  --on-night-muted: #B9C4D9;
  --cyan: #5CC8FA;
  --token: #1A52C4;
  --display: 'IBM Plex Serif', Georgia, 'Times New Roman', serif;
  --body: 'IBM Plex Sans', 'Segoe UI', Arial, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, Menlo, Consolas, monospace;
  --wrap: 1160px;
  --radius: 14px;
  --gutter-l: max(16px, env(safe-area-inset-left, 0px));
  --gutter-r: max(16px, env(safe-area-inset-right, 0px));
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0A1330; --surface: #111D42; --ink: #EEF2F8; --muted: #A6B2C8; --line: #24345F;
    --accent: #4C8DF6; --accent-ink: #8AB6FF; --accent-soft: #16285A;
    --night: #060D24; --night-2: #13224B; --night-line: #22325E; --on-night: #F5F7FA; --on-night-muted: #B9C4D9;
    --token: #8AB6FF; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0A1330; --surface: #111D42; --ink: #EEF2F8; --muted: #A6B2C8; --line: #24345F;
  --accent: #4C8DF6; --accent-ink: #8AB6FF; --accent-soft: #16285A;
  --night: #060D24; --night-2: #13224B; --night-line: #22325E; --on-night: #F5F7FA; --on-night-muted: #B9C4D9;
  --token: #8AB6FF; color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; animation: none !important; } }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 17px/1.6 var(--body); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; }
a { color: var(--accent-ink); }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
h1, h2, h3 { margin: 0; text-wrap: balance; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
[hidden] { display: none !important; }
.skip { position: absolute; left: 16px; top: -60px; z-index: 50; background: var(--accent); color: #FFFFFF; padding: 10px 14px; border-radius: 8px; font-weight: 600; text-decoration: none; }
.skip:focus { top: 12px; }

.band { padding-block: clamp(64px, 9vw, 104px); padding-left: var(--gutter-l); padding-right: var(--gutter-r); }
.band.night { background: var(--night); color: var(--on-night); }
.band.alt { background: var(--surface); border-block: 1px solid var(--line); }
.wrap { max-width: var(--wrap); margin-inline: auto; display: flex; flex-direction: column; gap: clamp(32px, 4vw, 48px); }

.eyebrow { font: 600 13px/1.3 var(--body); letter-spacing: .14em; text-transform: uppercase; color: var(--accent-ink); }
.night .eyebrow { color: var(--cyan); }
.h2 { font: 400 clamp(30px, 4vw, 46px)/1.12 var(--display); letter-spacing: -.01em; max-width: 26ch; }
.lede { font-size: clamp(18px, 1.6vw, 20px); color: var(--muted); max-width: 62ch; }
.night .lede { color: var(--on-night-muted); }
.head { display: flex; flex-direction: column; gap: 14px; }
.tok { font-family: var(--mono); font-size: .9em; color: var(--token); }
.night .tok { color: var(--cyan); }
.more { align-self: flex-start; font-weight: 600; text-decoration: none; display: inline-flex; gap: 6px; align-items: center; }
.more::after { content: "→"; transition: transform .15s; }
.more:hover::after { transform: translateX(3px); }
.night .more { color: var(--cyan); }

/* Header */
.site-head { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--surface) 92%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); padding-top: env(safe-area-inset-top, 0px); padding-left: var(--gutter-l); padding-right: var(--gutter-r); }
.site-head .in { max-width: var(--wrap); margin-inline: auto; display: flex; align-items: center; gap: 24px; min-height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font: 700 22px/1 var(--body); letter-spacing: -.01em; }
.brand img { width: 30px; height: 32px; }
.nav { display: flex; gap: 26px; margin-left: auto; }
.nav a { color: var(--muted); text-decoration: none; font-size: 15px; font-weight: 500; padding-block: 6px; border-bottom: 2px solid transparent; }
.nav a:hover { color: var(--ink); }
.nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); }
.menu-btn { display: none; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 10px; background: transparent; color: var(--ink); cursor: pointer; place-items: center; padding: 0; }
@media (max-width: 900px) {
  .menu-btn { display: inline-grid; }
  .site-head .btn { margin-left: auto; }
  .nav { display: none; position: absolute; left: 0; right: 0; top: 100%; margin: 0; flex-direction: column; gap: 0; background: var(--surface); border-bottom: 1px solid var(--line); padding: 4px max(16px, env(safe-area-inset-right, 0px)) 12px max(16px, env(safe-area-inset-left, 0px)); box-shadow: 0 20px 30px -20px rgba(15, 27, 61, .35); }
  .nav.open { display: flex; }
  .nav a { font-size: 17px; padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav a:last-child { border-bottom: 0; }
  .nav a[aria-current="page"] { color: var(--accent-ink); border-bottom-color: var(--line); }
}

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font: 600 16px/1 var(--body); padding: 14px 20px; border-radius: 10px; text-decoration: none; border: 1px solid transparent; cursor: pointer; }
.btn.primary { background: var(--accent); color: #FFFFFF; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.ghost { border-color: var(--line); color: var(--ink); background: transparent; }
.night .btn.ghost { border-color: #3A4D82; color: var(--on-night); }
.btn.light { background: #FFFFFF; color: #1A52C4; }
.btn.small { padding: 10px 14px; font-size: 14px; }
.btn:disabled { opacity: .6; cursor: progress; }

/* Home hero */
.hero { padding-block: clamp(48px, 7vw, 96px) clamp(56px, 8vw, 104px); padding-left: var(--gutter-l); padding-right: var(--gutter-r); }
.hero .in { max-width: var(--wrap); margin-inline: auto; display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(32px, 5vw, 64px); align-items: center; }
.hero-copy { display: flex; flex-direction: column; gap: 22px; min-width: 0; }
.hero h1 { font: 400 clamp(40px, 5.6vw, 66px)/1.05 var(--display); letter-spacing: -.015em; }
.hero h1 span { color: var(--accent-ink); }
.ctas { display: flex; flex-wrap: wrap; gap: 12px; }
.motto { font: 500 15px/1 var(--mono); color: var(--muted); letter-spacing: .02em; }
@media (max-width: 960px) { .hero .in { grid-template-columns: 1fr; } }

/* Inner page hero */
.page-hero { background: var(--surface); border-bottom: 1px solid var(--line); padding-block: clamp(48px, 7vw, 88px) clamp(44px, 6vw, 72px); padding-left: var(--gutter-l); padding-right: var(--gutter-r); }
.page-hero .wrap { gap: 18px; }
.page-hero h1 { font: 400 clamp(36px, 5vw, 58px)/1.08 var(--display); letter-spacing: -.015em; max-width: 22ch; }

/* Demo */
.demo { background: var(--night); color: var(--on-night); border-radius: 18px; padding: clamp(20px, 3vw, 32px); display: flex; flex-direction: column; gap: 20px; min-width: 0; box-shadow: 0 30px 60px -30px rgba(15, 27, 61, .55); }
.demo-top { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.demo-label { font: 600 12px/1.3 var(--body); letter-spacing: .14em; text-transform: uppercase; color: var(--on-night-muted); }
.demo-label b { color: var(--cyan); font-weight: 600; }
.switch { display: inline-flex; align-items: center; gap: 10px; background: none; border: 0; color: var(--on-night); font: 500 14px/1 var(--body); cursor: pointer; padding: 4px; }
.switch .track { width: 44px; height: 24px; border-radius: 999px; background: #33467A; position: relative; transition: background .2s; }
.switch .track::after { content: ""; position: absolute; top: 3px; left: 3px; width: 18px; height: 18px; border-radius: 50%; background: #FFFFFF; transition: transform .2s; }
.switch[aria-checked="true"] .track { background: var(--accent); }
.switch[aria-checked="true"] .track::after { transform: translateX(20px); }
.demo-text { font-size: clamp(17px, 1.6vw, 19px); line-height: 1.7; background: var(--night-2); border-radius: 12px; padding: 20px 22px; min-height: 9.5em; }
.demo-text .v { border-bottom: 1.5px solid rgba(92, 200, 250, .55); }
.demo-text.sent .v { font-family: var(--mono); font-size: .9em; color: var(--cyan); border-bottom-color: transparent; }
.demo-foot { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--on-night-muted); }
.demo-foot svg { flex: none; margin-top: 3px; }

/* Cards and grids */
.grid3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
@media (max-width: 860px) { .grid3 { grid-template-columns: 1fr; } }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.band.alt .card { background: var(--bg); }
.card h3 { font: 600 20px/1.3 var(--body); }
.card p, .card li { color: var(--muted); font-size: 16px; }
.card .ico { width: 36px; height: 36px; border-radius: 10px; background: var(--accent-soft); color: var(--accent-ink); display: grid; place-items: center; }
.card .num { width: 36px; height: 36px; border-radius: 50%; background: var(--ink); color: var(--bg); display: grid; place-items: center; font-weight: 700; }
.card.hi { border-color: var(--accent); background: var(--accent-soft); }
.card .big { font: 400 26px/1.25 var(--display); color: var(--ink); }
.night .card { background: var(--night-2); border-color: transparent; }
.night .card h3 { color: var(--on-night); }
.night .card p { color: var(--on-night-muted); }
.night .card .ico { background: rgba(92, 200, 250, .12); color: var(--cyan); }
.closing { font-size: 18px; max-width: 70ch; }
.list { display: flex; flex-direction: column; gap: 10px; }
.list li { position: relative; padding-left: 18px; }
.list li::before { content: ""; position: absolute; left: 0; top: .7em; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }

/* Flow diagram */
.flow { display: grid; grid-template-columns: 1.3fr auto 1fr; gap: 24px; align-items: center; }
.box { border-radius: 16px; padding: 24px; display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.box.machine { border: 2px solid var(--ink); background: var(--surface); }
.box-title { font: 600 13px/1.2 var(--body); letter-spacing: .14em; text-transform: uppercase; }
.box-name { font: 600 20px/1.3 var(--body); }
.step { background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; }
.step.hi { background: var(--accent-soft); border-color: var(--accent); }
.step strong { display: block; font-size: 16px; }
.step span { color: var(--muted); font-size: 15px; }
.arrows { display: flex; flex-direction: column; gap: 14px; align-items: center; font-size: 13px; color: var(--muted); text-align: center; }
.arrows svg { display: block; }
.right { display: flex; flex-direction: column; gap: 16px; }
.box.provider { background: var(--surface); border: 1px solid var(--line); }
.box.us { border: 2px dashed var(--line); }
.box.us .box-name { color: var(--muted); }
.box p { color: var(--muted); font-size: 15px; }
.box .yes { color: var(--ink); font-weight: 600; font-size: 15px; }
@media (max-width: 860px) { .flow { grid-template-columns: 1fr; } .arrows { flex-direction: row; justify-content: center; } .arrows svg { transform: rotate(90deg); } }

/* Two-column split */
.split { display: grid; grid-template-columns: 1.25fr 1fr; gap: clamp(28px, 4vw, 56px); align-items: start; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg); min-width: 0; }
table { border-collapse: collapse; width: 100%; font-size: 16px; }
th, td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--line); }
th { font: 600 12px/1.3 var(--body); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); background: var(--surface); }
tr:last-child td { border-bottom: 0; }
@media (max-width: 560px) { th, td { padding: 10px 12px; font-size: 15px; } }
.points { display: flex; flex-direction: column; gap: 22px; }
.points h3 { font: 600 19px/1.3 var(--body); margin-bottom: 4px; }
.points p { color: var(--muted); }

/* Document chat example */
.chat { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 22px; display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.bubble-q { align-self: flex-end; max-width: 85%; background: var(--night); color: var(--on-night); padding: 12px 16px; border-radius: 14px 14px 4px 14px; }
.bubble-a { background: var(--bg); padding: 14px 16px; border-radius: 14px 14px 14px 4px; }
.cite { font: 500 13px/1 var(--mono); color: var(--accent-ink); background: var(--accent-soft); padding: 3px 7px; border-radius: 6px; white-space: nowrap; }
.chat small { color: var(--muted); font-size: 13px; }

/* Promise band */
.promise { background: var(--accent); color: #FFFFFF; }
.promise .wrap { gap: 22px; }
.promise h2 { font: 400 clamp(34px, 5vw, 58px)/1.08 var(--display); max-width: 18ch; }
.promise p { font-size: clamp(18px, 1.7vw, 21px); max-width: 60ch; color: #F0F5FF; }
.promise .btn { align-self: flex-start; }

/* Closing call to action */
.cta .wrap { flex-direction: row; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 24px 48px; }
.cta .head { max-width: 640px; }

/* Numbered steps */
.ol { display: flex; flex-direction: column; gap: 18px; counter-reset: s; }
.ol li { display: grid; grid-template-columns: 40px 1fr; gap: 16px; align-items: start; counter-increment: s; }
.ol li::before { content: counter(s); width: 40px; height: 40px; border-radius: 50%; background: var(--ink); color: var(--bg); display: grid; place-items: center; font-weight: 700; }
.ol li:last-child::before { background: var(--accent); color: #FFFFFF; }
.ol li p { padding-top: 7px; }
.ol li p span { color: var(--muted); }
.aside { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; display: flex; flex-direction: column; gap: 10px; }
.band.alt .aside { background: var(--bg); }
.aside h3 { font: 600 19px/1.3 var(--body); }
.aside p { color: var(--muted); }
.aside hr { border: 0; border-top: 1px solid var(--line); margin: 10px 0; width: 100%; }

/* Pilot */
.checks { display: flex; flex-direction: column; gap: 14px; }
.checks li { display: flex; gap: 12px; align-items: flex-start; font-size: 18px; }
.checks svg { flex: none; color: var(--accent-ink); margin-top: 5px; }
.team { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
@media (max-width: 760px) { .team { grid-template-columns: 1fr; } }
.person { display: flex; gap: 16px; align-items: flex-start; }
.person .avatar { flex: none; width: 52px; height: 52px; border-radius: 50%; background: var(--accent-soft); color: var(--accent-ink); display: grid; place-items: center; font: 600 18px/1 var(--body); }
.person h3 { font: 600 18px/1.3 var(--body); }
.person p { color: var(--muted); font-size: 16px; }

/* FAQ */
.faq { display: flex; flex-direction: column; border-top: 1px solid var(--line); max-width: 860px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 16px; padding: 22px 4px; font: 600 18px/1.4 var(--body); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font: 400 24px/1 var(--body); color: var(--accent-ink); }
.faq details[open] summary::after { content: "−"; }
.faq details p { padding: 0 4px 22px; color: var(--muted); max-width: 70ch; }

/* Contact */
.contact { display: grid; grid-template-columns: 1fr 1.15fr; gap: clamp(28px, 5vw, 64px); align-items: start; }
@media (max-width: 860px) { .contact { grid-template-columns: 1fr; } }
.contact-copy { display: flex; flex-direction: column; gap: 20px; }
.contact-copy h1 { font: 400 clamp(36px, 4.6vw, 54px)/1.1 var(--display); letter-spacing: -.015em; }
.addr { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; font: 500 16px/1.4 var(--mono); color: var(--on-night); overflow-wrap: anywhere; }
form { background: var(--surface); color: var(--ink); border-radius: 18px; padding: clamp(20px, 3vw, 32px); display: grid; grid-template-columns: 1fr 1fr; gap: 16px; position: relative; }
form .full { grid-column: 1 / -1; }
@media (max-width: 560px) { form { grid-template-columns: 1fr; } }
label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; font-weight: 600; }
label .opt { font-weight: 400; color: var(--muted); }
input, select, textarea { font: 400 16px/1.4 var(--body); color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; width: 100%; }
textarea { min-height: 120px; resize: vertical; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-msg { grid-column: 1 / -1; border-radius: 10px; padding: 14px 16px; background: var(--accent-soft); font-size: 15px; display: flex; flex-direction: column; gap: 10px; }
.form-msg pre { margin: 0; white-space: pre-wrap; font: 400 13px/1.5 var(--mono); background: var(--bg); padding: 12px; border-radius: 8px; overflow-x: auto; }
.form-msg .row { display: flex; gap: 10px; flex-wrap: wrap; }
.err { color: #B42318; font-size: 14px; }

/* Long-form text (privacy notice) */
.prose { max-width: 760px; display: flex; flex-direction: column; gap: 16px; }
.prose h2 { font: 600 21px/1.3 var(--body); margin-top: 20px; }
.prose p, .prose li { color: var(--muted); }
.prose ul { list-style: disc; padding-left: 22px; display: flex; flex-direction: column; gap: 8px; }

/* Footer */
.foot { border-top: 1px solid var(--night-line); background: var(--night); color: var(--on-night-muted); padding-block: 56px 32px; padding-left: var(--gutter-l); padding-right: var(--gutter-r); padding-bottom: max(32px, env(safe-area-inset-bottom, 0px)); font-size: 15px; }
.foot .in { max-width: var(--wrap); margin-inline: auto; display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 36px 40px; }
.foot .brand { color: var(--on-night); }
.foot .brand-col { display: flex; flex-direction: column; gap: 14px; }
.foot .tagline { font: 500 14px/1.4 var(--mono); color: var(--cyan); }
.foot h2 { font: 600 12px/1.3 var(--body); letter-spacing: .12em; text-transform: uppercase; color: var(--on-night); margin-bottom: 14px; }
.foot ul { display: flex; flex-direction: column; gap: 10px; }
.foot a { color: var(--on-night-muted); text-decoration: none; }
.foot a:hover { color: var(--on-night); text-decoration: underline; }
.foot .legal { grid-column: 1 / -1; border-top: 1px solid var(--night-line); padding-top: 22px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px 24px; font-size: 14px; }
.foot .legal a { overflow-wrap: anywhere; }
@media (max-width: 680px) { .foot .in { grid-template-columns: 1fr 1fr; } .foot .brand-col { grid-column: 1 / -1; } }