/* SOVERGENT — concept-stage prototype stylesheet
   Palette: deep navy with cyan/teal-to-blue accents, derived from the SOVERGENT logo.
   Accessibility: WCAG 2.2 AA contrast (tokens below), visible focus, reduced-motion support,
   semantic structure; no external fonts or scripts. */

:root {
  --bg: #020d1a;
  --bg-soft: #06182c;
  --bg-card: #0a2136;
  --bg-elev: #0e2b47;
  --fg: #eef4fb;
  --fg-soft: #c9d9ec;
  --muted: #8fa7c4;
  --line: #14354e;
  --line-soft: #0f2a40;
  --accent: #31ceef;
  --accent-ink: #031320;
  --accent-2: #4db0a7;
  --accent-grad: linear-gradient(118deg, #57ecf2 0%, #19a1df 100%);
  --ok: #58c9a8;
  --warn: #e0b25c;
  --danger: #ef7676;
  --maxw: 74rem;
  --radius: 12px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 4.5rem; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  text-rendering: optimizeLegibility;
}
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, button:focus-visible, input:focus-visible, [tabindex]:focus-visible {
  outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px;
}
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 1.25rem; }
.narrow { max-width: 48rem; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 1rem; top: 1rem; z-index: 60; background: var(--bg-card); color: var(--fg); padding: .6rem .9rem; border: 2px solid var(--accent); border-radius: 8px; }
.sr { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

/* header */
.site-head { position: sticky; top: 0; z-index: 40; background: color-mix(in srgb, var(--bg) 90%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.head-inner { display: flex; align-items: center; gap: .9rem; min-height: 3.9rem; flex-wrap: wrap; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: .55rem; text-decoration: none; color: var(--fg); }
.brand-mark { display: block; width: 36px; height: 36px; object-fit: contain; }
.brand-name { font-weight: 800; letter-spacing: -0.01em; font-size: 1.05rem; }
.brand-suffix { color: var(--muted); font-weight: 650; font-size: .8em; letter-spacing: .06em; }
nav a { color: var(--muted); text-decoration: none; margin-left: .95rem; font-size: .9rem; padding: .25rem 0; }
nav a:hover { color: var(--fg); }
nav a[aria-current="true"] { color: var(--fg); box-shadow: inset 0 -2px 0 var(--accent); }

/* hero */
.hero { padding: 4.2rem 0 2.8rem; border-bottom: 1px solid var(--line); }
.eyebrow { text-transform: uppercase; letter-spacing: .14em; font-size: .76rem; color: var(--muted); margin: 0 0 .9rem; }
h1 { font-size: clamp(2.3rem, 1.3rem + 3.6vw, 3.6rem); line-height: 1.06; letter-spacing: -0.025em; margin: .2rem 0 .9rem; }
h2 { font-size: clamp(1.5rem, 1.1rem + 1.7vw, 2.15rem); line-height: 1.15; letter-spacing: -0.015em; margin: 0 0 .7rem; }
h3 { font-size: 1.08rem; margin: 0 0 .35rem; }
.lede { font-size: 1.16rem; color: var(--fg-soft); max-width: 48rem; }
.sub { font-size: 1rem; color: var(--muted); max-width: 48rem; }
.actions { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 1.3rem; }
.button { display: inline-block; background: var(--accent-grad); color: var(--accent-ink); text-decoration: none; font-weight: 700; padding: .78rem 1.25rem; border-radius: 10px; border: 1px solid transparent; cursor: pointer; font-size: 1rem; }
.button:hover { filter: brightness(1.07); }
.ghost { display: inline-block; border: 1px solid var(--line); color: var(--fg); background: transparent; text-decoration: none; font-weight: 650; padding: .75rem 1.15rem; border-radius: 10px; cursor: pointer; font-size: 1rem; }
.ghost:hover { border-color: var(--accent); }
.btn-sm { padding: .45rem .8rem; font-size: .9rem; border-radius: 8px; }

/* hero flow visualization */
.flow { margin-top: 2rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-soft); padding: 1.1rem 1.1rem .9rem; }
.flow-rail { display: flex; align-items: center; gap: 0; flex-wrap: wrap; }
.flow-node { flex: 1 1 0; min-width: 120px; text-align: center; padding: .5rem .3rem; position: relative; }
.flow-dot { width: 34px; height: 34px; margin: 0 auto .4rem; border-radius: 50%; border: 1px solid var(--line); background: var(--bg-card); display: flex; align-items: center; justify-content: center; font-size: .8rem; color: var(--muted); font-weight: 700; }
.flow-node .flow-label { font-size: .82rem; color: var(--muted); }
.flow-node.is-active .flow-dot { border-color: var(--accent); color: var(--accent-ink); background: var(--accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 22%, transparent); }
.flow-node.is-active .flow-label { color: var(--fg); }
.flow-node.is-done .flow-dot { border-color: var(--ok); color: var(--ok); }
.flow-link { flex: 0 0 22px; height: 2px; background: var(--line); align-self: center; margin-bottom: 1.4rem; }
.flow-status { margin: .7rem 0 0; font-size: .9rem; color: var(--fg-soft); min-height: 1.4em; }
.flow-caption { margin: .35rem 0 0; font-size: .8rem; color: var(--muted); }

/* sections */
section { padding: 3.3rem 0; }
section.band { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-label { display: inline-block; border: 1px solid var(--line); border-radius: 999px; padding: .14rem .6rem; font-size: .74rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-bottom: .9rem; }
.section-label.warn { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 45%, var(--line)); }

/* cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 1.4rem; }
.cards.four { grid-template-columns: repeat(4, 1fr); }
.card { background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.15rem 1.15rem 1rem; }
.card p { margin: 0; color: var(--fg-soft); font-size: .95rem; }
.card .num { color: var(--accent); font-weight: 800; font-size: .85rem; letter-spacing: .1em; }
.card h3 { margin-top: .3rem; }
.card .tag { display: inline-block; margin-top: .7rem; font-size: .76rem; color: var(--muted); border-top: 1px solid var(--line-soft); padding-top: .5rem; width: 100%; }

/* lists */
.checks { list-style: none; padding: 0; margin: 1rem 0 .4rem; }
.checks li { padding-left: 1.6rem; position: relative; margin: .5rem 0; }
.checks li::before { content: "\2192"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }
.textlink { font-weight: 650; }
.fine { color: var(--muted); font-size: .85rem; }
.usecases { display: grid; grid-template-columns: repeat(3, 1fr); gap: .6rem; margin: 1.2rem 0 0; padding: 0; list-style: none; }
.usecases li { border: 1px solid var(--line); border-radius: 10px; background: var(--bg-card); padding: .6rem .8rem; font-size: .92rem; color: var(--fg-soft); }
.integ { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 1.4rem; }
.integ article { background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1rem .85rem; }
.integ h3 { margin: 0; font-size: .98rem; }
.integ .chips { margin: .55rem 0 0; }

/* autonomy explorer */
.explorer { margin-top: 1.6rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-card); padding: 1.1rem; }
.tabs { display: flex; flex-wrap: wrap; gap: .5rem; margin: 0 0 1rem; padding: 0; }
.tabs button { border: 1px solid var(--line); background: transparent; color: var(--fg-soft); border-radius: 999px; padding: .42rem .85rem; font-size: .9rem; cursor: pointer; font-family: inherit; }
.tabs button[aria-selected="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 700; }
.panel h3 { margin: 0 0 .4rem; }
.panel dl { display: grid; grid-template-columns: 11rem 1fr; gap: .35rem 1rem; margin: .6rem 0 0; }
.panel dt { color: var(--muted); font-size: .88rem; }
.panel dd { margin: 0; font-size: .95rem; color: var(--fg-soft); }

/* demo (day in the life) */
.demo { margin-top: 1.4rem; display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: 1rem; }
.demo-timeline { border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-card); padding: 1rem; }
.demo-controls { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; margin-bottom: .8rem; }
.demo-progress { color: var(--muted); font-size: .85rem; margin-left: auto; }
.steps { list-style: none; margin: 0; padding: 0; counter-reset: step; }
.steps li { margin: 0 0 .3rem; }
.steps button { width: 100%; text-align: left; background: transparent; border: 1px solid transparent; color: var(--fg-soft); border-radius: 8px; padding: .45rem .6rem; cursor: pointer; font: inherit; font-size: .92rem; display: flex; gap: .6rem; align-items: baseline; }
.steps button:hover { border-color: var(--line); }
.steps .idx { color: var(--muted); font-size: .8rem; min-width: 1.4rem; }
.steps button[aria-current="step"] { background: var(--bg-elev); border-color: var(--accent); color: var(--fg); }
.steps .state { margin-left: auto; font-size: .74rem; color: var(--muted); }
.steps .state.ok { color: var(--ok); }
.steps .state.warn { color: var(--warn); }
.demo-console { border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-card); padding: 1rem; }
.console-grid { display: grid; grid-template-columns: 12rem 1fr; gap: .45rem 1rem; margin: 0; }
.console-grid dt { color: var(--muted); font-size: .86rem; }
.console-grid dd { margin: 0; font-size: .93rem; color: var(--fg-soft); }
.pill { display: inline-block; border-radius: 999px; padding: .08rem .55rem; font-size: .78rem; border: 1px solid var(--line); }
.pill.ok { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 45%, var(--line)); }
.pill.warn { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 45%, var(--line)); }
.pill.danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 45%, var(--line)); }
.audit { margin-top: .9rem; border-top: 1px solid var(--line-soft); padding-top: .7rem; }
.audit h3 { margin: 0 0 .4rem; font-size: .8rem; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); }
.audit ol { margin: 0; padding-left: 1.2rem; font-size: .85rem; color: var(--fg-soft); max-height: 11rem; overflow: auto; }
.audit li { margin: .25rem 0; }
.audit time { color: var(--muted); margin-right: .4rem; }

/* governance */
.gov-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: .6rem; margin-top: 1.3rem; padding: 0; list-style: none; }
.gov-grid li { border: 1px solid var(--line); border-radius: 10px; background: var(--bg-card); padding: .6rem .7rem; font-size: .88rem; color: var(--fg-soft); }
.gov-demo { margin-top: 1.3rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-card); padding: 1rem; }
.gov-out { margin: .8rem 0 0; padding: .7rem .8rem; border-radius: 10px; border: 1px solid var(--line); background: var(--bg-soft); font-size: .92rem; min-height: 3.2rem; }
.gov-out .headline { font-weight: 700; display: block; margin-bottom: .2rem; }

/* business model */
.rev { margin-top: 1.4rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-card); padding: 1.1rem; }
.rev-inputs { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem 1.4rem; }
.rev-field label { display: block; font-size: .88rem; color: var(--fg-soft); margin-bottom: .3rem; }
.rev-field input[type="range"] { width: 100%; accent-color: var(--accent); }
.rev-field output { display: inline-block; margin-top: .3rem; font-weight: 700; color: var(--fg); }
.rev-outs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 1.2rem; border-top: 1px solid var(--line-soft); padding-top: 1rem; }
.rev-outs .metric { font-size: 1.5rem; font-weight: 800; letter-spacing: -0.02em; color: var(--accent); }
.rev-outs .metric-label { font-size: .84rem; color: var(--muted); }

/* opportunity memo */
.memo { display: grid; grid-template-columns: repeat(3, 1fr); gap: .8rem; margin-top: 1.3rem; }
.memo article { border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-card); padding: .9rem 1rem; }
.memo h3 { font-size: .8rem; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); margin: 0 0 .45rem; }
.memo p { margin: 0; font-size: .92rem; color: var(--fg-soft); }
.roadmap { list-style: none; padding: 0; margin: 1.2rem 0 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: .6rem; }
.roadmap li { border: 1px solid var(--line); border-top: 3px solid var(--accent); border-radius: 10px; background: var(--bg-card); padding: .7rem .8rem; font-size: .86rem; color: var(--fg-soft); }
.roadmap .stage { display: block; font-size: .72rem; color: var(--muted); letter-spacing: .08em; text-transform: uppercase; margin-bottom: .3rem; }

.chips { list-style: none; display: flex; flex-wrap: wrap; gap: .4rem; padding: 0; margin: .6rem 0 0; }
.chips li { border: 1px solid var(--line); border-radius: 999px; padding: .18rem .6rem; font-size: .78rem; color: var(--fg-soft); }
.advantage { margin-top: 1.6rem; border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: var(--radius); padding: 1.3rem 1.3rem 1.1rem; background: var(--bg-card); }
.advantage h3 { text-transform: uppercase; letter-spacing: .12em; font-size: .8rem; color: var(--muted); margin: 0 0 .6rem; }

/* footer */
.site-foot { border-top: 1px solid var(--line); padding: 1.8rem 0 2.6rem; color: var(--muted); font-size: .95rem; }
.foot-logo { height: 68px; width: auto; margin-bottom: 1rem; display: block; }
.site-foot .fine { font-size: .82rem; }
.foot-links { margin: .4rem 0; }

@media (max-width: 980px) {
  .cards, .cards.four, .memo, .gov-grid, .integ { grid-template-columns: repeat(2, 1fr); }
  .demo { grid-template-columns: 1fr; }
  .rev-inputs { grid-template-columns: 1fr 1fr; }
  .rev-outs { grid-template-columns: 1fr 1fr 1fr; }
  .roadmap { grid-template-columns: repeat(2, 1fr); }
  .usecases { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  section { padding: 2.7rem 0; }
  .cards, .cards.four, .memo, .gov-grid, .usecases, .roadmap, .rev-inputs, .rev-outs, .integ { grid-template-columns: 1fr; }
  .console-grid, .panel dl { grid-template-columns: 1fr; }
  .hero { padding: 2.6rem 0 2rem; }
  .hero .actions { flex-direction: column; align-items: stretch; }
  .hero .actions .button, .hero .actions .ghost { display: block; text-align: center; }
  .head-inner { flex-wrap: nowrap; gap: .55rem; }
  .brand { flex: 0 0 auto; }
  .brand-mark { width: 32px; height: 32px; }
  .brand-name { font-size: .98rem; }
  nav { display: flex; flex: 1 1 auto; min-width: 0; gap: .95rem; overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; padding: 0; }
  nav::-webkit-scrollbar { display: none; }
  nav a { margin-left: 0; font-size: .85rem; flex: 0 0 auto; white-space: nowrap; padding: .45rem 0; }
  .flow-link { display: none; }
  .flow-rail { display: block; }
  .flow-node { display: flex; align-items: center; text-align: left; gap: .7rem; min-width: 0; padding: .45rem .15rem; }
  .flow-dot { margin: 0; flex: 0 0 30px; width: 30px; height: 30px; font-size: .75rem; }
  .flow-node .flow-label { font-size: .88rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}

/* utility */
.notfound { padding: 96px 22px; }
hr { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }