/* SimHALO beta landing — "resus bay at night": the app's navy, one magenta signal
   colour from the logo, monitor-style mono labels. No build step. */

:root {
  --bg: #F3F4F8;
  --bg-alt: #E9EBF2;
  --surface: #FFFFFF;
  --surface-2: #F6F7FB;
  --line: #D6D9E4;
  --text: #13132A;
  --muted: #4E5068;
  --accent: #A21CAF;          /* brand magenta, darkened for AA on light */
  --accent-ink: #FFFFFF;
  --accent-soft: #F7E8FA;
  --live: #0E8A4F;
  --amber: #8A5A00;
  --amber-soft: #FFF3D6;
  --monitor-bg: #0F0F1A;
  --monitor-text: #E9E9F4;
  --monitor-muted: #9C9CB8;
  --monitor-accent: #E879F9;
  --monitor-line: #262640;
  --focus: #1D4ED8;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(15, 15, 26, .06), 0 8px 24px rgba(15, 15, 26, .06);
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Roboto Mono", monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0F0F1A;               /* app background (app.json) */
    --bg-alt: #13132A;
    --surface: #17172A;
    --surface-2: #1D1D33;
    --line: #2A2A46;
    --text: #EDEDF6;
    --muted: #A6A6C0;
    --accent: #E879F9;           /* brand magenta, lifted for AA on navy */
    --accent-ink: #14051A;
    --accent-soft: #2A1636;
    --live: #4ADE80;
    --amber: #FBBF24;
    --amber-soft: #2E2410;
    --monitor-bg: #090912;
    --monitor-line: #23233A;
    --focus: #93C5FD;
    --shadow: 0 1px 0 rgba(255, 255, 255, .03) inset, 0 12px 32px rgba(0, 0, 0, .35);
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 1rem/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-underline-offset: .18em; }
a:hover { text-decoration-thickness: 2px; }
h1, h2, h3 { line-height: 1.15; margin: 0 0 .5em; letter-spacing: -.015em; }
p { margin: 0 0 .9em; }
.mono { font-family: var(--mono); letter-spacing: .02em; }
.fine { font-size: .9rem; color: var(--muted); }
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 6px; }

.skip {
  position: absolute; left: 12px; top: -60px; z-index: 50;
  background: var(--text); color: var(--bg); padding: 10px 14px; border-radius: 8px;
}
.skip:focus { top: 12px; }

.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.wrap--narrow { max-width: 760px; }

/* Top bar ---------------------------------------------------------------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar__inner { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 12px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; }
.brand img { width: 32px; height: 32px; }
.brand__name { font-weight: 750; font-size: 1.1rem; letter-spacing: .01em; }
.nav { list-style: none; display: flex; gap: 4px; margin: 0; padding: 0; }
.nav a {
  display: inline-block; padding: 8px 10px; border-radius: 8px;
  color: var(--muted); text-decoration: none; font-size: .95rem;
}
.nav a:hover { color: var(--text); background: var(--surface-2); }
.nav li:not(:last-child) { display: none; }
.nav__cta { color: var(--accent) !important; font-weight: 650; border: 1px solid var(--line); }

.tag {
  display: inline-block; font: 600 .7rem/1 var(--mono); text-transform: uppercase;
  letter-spacing: .08em; padding: 5px 7px; border-radius: 6px;
}
.tag--beta { background: var(--accent-soft); color: var(--accent); }
.tag--soon { background: var(--amber-soft); color: var(--amber); }
.todo {
  display: inline-block; font: 600 .72rem/1.3 var(--mono); color: var(--amber);
  background: var(--amber-soft); border: 1px dashed currentColor; border-radius: 6px;
  padding: 2px 6px; margin-left: 2px;
}

.dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.dot--live { background: var(--live); box-shadow: 0 0 0 0 var(--live); animation: pulse 2s infinite; }

/* Hero ------------------------------------------------------------------- */
.hero { padding: 36px 0 56px; border-bottom: 1px solid var(--line); }
.hero__grid { display: grid; gap: 36px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font: 600 .78rem/1.2 var(--mono); text-transform: uppercase; letter-spacing: .1em;
  color: var(--muted);
}
.hero h1 { font-size: clamp(2.5rem, 10vw, 4.4rem); font-weight: 800; letter-spacing: -.03em; margin-top: 10px; }
.accent { color: var(--accent); }
.lede { font-size: 1.12rem; color: var(--muted); max-width: 34em; }

.install { margin-top: 26px; }
.install__buttons { display: flex; flex-direction: column; gap: 12px; }
.btn {
  position: relative; display: flex; align-items: center; gap: 14px;
  min-height: 64px; padding: 12px 18px; border-radius: var(--radius);
  text-decoration: none; color: var(--text);
  background: var(--surface); border: 1.5px solid var(--line);
  box-shadow: var(--shadow);
  transition: transform .15s ease, border-color .15s ease, background .15s ease;
}
.btn:hover { border-color: var(--accent); transform: translateY(-1px); }
.btn__icon { width: 26px; height: 26px; flex: none; }
.btn__text { display: flex; flex-direction: column; line-height: 1.25; }
.btn__label { font-weight: 700; font-size: 1.05rem; }
.btn__sub { font-size: .85rem; color: var(--muted); }
.btn__rec {
  display: none; margin-left: auto;
  font: 700 .66rem/1 var(--mono); text-transform: uppercase; letter-spacing: .1em;
  padding: 6px 8px; border-radius: 6px; background: var(--accent-ink); color: var(--accent);
  white-space: nowrap; flex: none;
}
/* Recommended (detected) platform */
.btn.is-recommended {
  background: var(--accent); color: var(--accent-ink); border-color: var(--accent);
  order: -1;
}
.btn.is-recommended .btn__sub { color: inherit; opacity: .85; }
.btn.is-recommended .btn__rec { display: inline-block; }
.btn.is-secondary { box-shadow: none; min-height: 56px; }
/* Link not configured yet */
.btn[aria-disabled="true"] { cursor: not-allowed; opacity: .62; transform: none; }
.btn.is-recommended[aria-disabled="true"] { opacity: .8; }
.btn[aria-disabled="true"]:hover { border-color: var(--line); }
.btn.is-recommended[aria-disabled="true"]:hover { border-color: var(--accent); }

/* Beta sign-up (waitlist) */
.signup {
  margin-top: 26px; padding: 20px; border-radius: var(--radius);
  background: var(--surface); border: 1.5px solid var(--line); box-shadow: var(--shadow);
  max-width: 34em;
}
.signup__title { font-size: 1.35rem; font-weight: 780; margin-bottom: .25em; }
.signup__intro { color: var(--muted); font-size: .98rem; }
.form { display: grid; gap: 14px; margin-top: 6px; }
.field { display: grid; gap: 6px; margin: 0; padding: 0; border: 0; min-width: 0; }
.field label, .field legend { font-weight: 650; font-size: .95rem; padding: 0; }
.field__hint { margin: 0; font-size: .82rem; color: var(--muted); }
.opt { font-weight: 400; color: var(--muted); }
.field input[type="text"], .field input[type="email"], .field select {
  width: 100%; min-height: 48px; padding: 10px 12px;
  font: inherit; font-size: 16px; /* 16px stops iOS zooming on focus */
  color: var(--text); background: var(--surface-2);
  border: 1.5px solid var(--line); border-radius: 10px;
  appearance: none; -webkit-appearance: none;
}
.field select {
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 20px) 50%, calc(100% - 14px) 50%;
  background-size: 6px 6px; background-repeat: no-repeat; padding-right: 36px;
}
.field input:focus, .field select:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-soft); }
.field--choice { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.field--choice legend { width: 100%; margin-bottom: 6px; }
.choice {
  display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 8px 14px;
  border: 1.5px solid var(--line); border-radius: 10px; background: var(--surface-2); font-weight: 600 !important; cursor: pointer;
}
.field .choice { padding: 8px 14px; font-size: 1rem; }
.choice:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.choice input, .consent input { width: 20px; height: 20px; accent-color: var(--accent); margin: 0; flex: none; }
.consent { display: flex; gap: 10px; align-items: flex-start; font-size: .95rem; cursor: pointer; }
.consent span { padding-top: 1px; }
.hp { position: absolute !important; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form__error {
  margin: 0; padding: 10px 12px; border-radius: 10px; font-size: .92rem;
  background: var(--amber-soft); color: var(--amber); font-weight: 600;
}
.btn--primary {
  justify-content: center; width: 100%; min-height: 54px; cursor: pointer;
  font: 700 1.05rem/1 var(--sans);
  background: var(--accent); color: var(--accent-ink); border-color: var(--accent);
}
.btn--primary:disabled { opacity: .7; cursor: progress; transform: none; }
.form__privacy { margin: 0; }
.signup__done { outline: none; }
.signup__done-title { font-size: 1.2rem; font-weight: 750; display: flex; align-items: center; gap: 10px; }
.signup__closed { margin: 0; color: var(--muted); }

.install__note { margin-top: 14px; font-size: .92rem; color: var(--muted); max-width: 36em; }
.install__note ol { margin: 6px 0 0; padding-left: 1.2em; }
.install__desktop {
  font-size: .92rem; padding: 10px 12px; border-radius: 10px;
  background: var(--surface-2); border: 1px dashed var(--line);
}

/* Monitor illustration */
.monitor {
  margin: 0; align-self: start;
  background: var(--monitor-bg); color: var(--monitor-text);
  border: 1px solid var(--monitor-line); border-radius: 18px; padding: 14px 16px 12px;
  box-shadow: 0 20px 50px rgba(9, 9, 18, .28);
}
.monitor__bar {
  display: flex; gap: 10px; align-items: center; justify-content: space-between;
  font-size: .72rem; color: var(--monitor-muted); text-transform: uppercase;
  padding-bottom: 10px; border-bottom: 1px solid var(--monitor-line);
}
.monitor__case { color: var(--monitor-accent); flex: 1; text-align: center; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.monitor__live { display: inline-flex; align-items: center; gap: 6px; color: #4ADE80; }
.monitor .dot--live { background: #4ADE80; }
.wave { display: flex; align-items: center; justify-content: center; gap: 5px; height: 64px; margin: 10px 0; }
.wave i {
  display: block; width: 5px; border-radius: 4px; background: var(--monitor-accent);
  height: 30%; animation: talk 1.4s ease-in-out infinite;
}
.wave i:nth-child(3n)   { animation-duration: 1.1s; }
.wave i:nth-child(4n+1) { animation-duration: 1.7s; }
.wave i:nth-child(5n+2) { animation-delay: -.6s; }
.wave i:nth-child(odd)  { animation-delay: -.3s; }
.wave i:nth-child(7n)   { animation-delay: -.9s; }
.transcript { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.line { padding: 10px 12px; border-radius: 10px; background: #15152A; border: 1px solid var(--monitor-line); }
.line p { margin: 2px 0 0; font-size: .95rem; }
.line--you { background: #24102C; border-color: #4A1D57; }
.who { font-size: .68rem; text-transform: uppercase; letter-spacing: .1em; color: var(--monitor-muted); }
.line--you .who { color: var(--monitor-accent); }
.monitor__cap { font-size: .66rem; color: var(--monitor-muted); text-transform: uppercase; letter-spacing: .1em; margin-top: 10px; text-align: right; }

/* Sections --------------------------------------------------------------- */
.section { padding: 64px 0; border-bottom: 1px solid var(--line); }
.section--alt { background: var(--bg-alt); }
.section__head { margin-bottom: 28px; max-width: 46em; }
.section__head h2 { font-size: clamp(1.7rem, 6vw, 2.5rem); font-weight: 780; }
.section__lede { color: var(--muted); font-size: 1.05rem; }
.kicker {
  font-size: .76rem; font-weight: 700; text-transform: uppercase; letter-spacing: .12em;
  color: var(--accent); margin: 0 0 10px;
}

/* Steps */
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; counter-reset: s; }
.step {
  position: relative; background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px 20px 18px 68px;
}
.step__n {
  position: absolute; left: 18px; top: 18px; width: 34px; height: 34px; border-radius: 50%;
  display: grid; place-items: center; font-weight: 700; font-size: .95rem;
  border: 1.5px solid var(--accent); color: var(--accent);
}
.step h3 { font-size: 1.15rem; margin-bottom: .3em; }
.step p { margin: 0; color: var(--muted); }

.split { display: grid; gap: 18px; margin-top: 28px; }
.roster, .cases { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.roster__grid { list-style: none; margin: 0 0 12px; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.roster__grid li {
  display: flex; flex-direction: column; padding: 10px 12px; border-radius: 10px;
  background: var(--surface-2); border-left: 3px solid var(--accent);
}
.roster__grid b { font-size: 1rem; }
.roster__grid span { font-size: .8rem; color: var(--muted); line-height: 1.3; }
.cases__list { list-style: none; margin: 0; padding: 0; }
.cases__list li {
  display: grid; grid-template-columns: 44px 1fr auto; gap: 12px; align-items: baseline;
  padding: 12px 0; border-bottom: 1px dashed var(--line);
}
.cases__list li:last-child { border-bottom: 0; }
.code { font-weight: 700; color: var(--accent); }
.case__t { font-weight: 560; }
.lvl { font-size: .7rem; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; }

/* Beta cards */
.cards { display: grid; gap: 16px; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px;
}
.card h3 { font-size: 1.2rem; }
.card--accent { border: 1.5px solid var(--accent); }
.ticks { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.ticks li { position: relative; padding-left: 22px; }
.ticks li::before {
  content: ""; position: absolute; left: 2px; top: .62em; width: 10px; height: 2px; background: var(--accent);
}
.reqs { margin: 0; display: grid; gap: 10px; }
.reqs div { display: grid; grid-template-columns: 80px 1fr; gap: 10px; padding-bottom: 10px; border-bottom: 1px dashed var(--line); }
.reqs div:last-child { border-bottom: 0; padding-bottom: 0; }
.reqs dt { font: 700 .74rem/1.9 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.reqs dd { margin: 0; }

/* How-to placeholders */
.howto { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; }
.howto__card { background: var(--surface); border: 1px dashed var(--line); border-radius: var(--radius); overflow: hidden; }
.howto__media {
  aspect-ratio: 16 / 9; display: grid; place-items: center;
  background:
    repeating-linear-gradient(135deg, transparent 0 10px, color-mix(in srgb, var(--line) 45%, transparent) 10px 11px),
    var(--surface-2);
}
.play {
  width: 52px; height: 52px; border-radius: 50%; border: 2px solid var(--muted); opacity: .55;
  position: relative;
}
.play::after {
  content: ""; position: absolute; left: 20px; top: 15px;
  border-left: 15px solid var(--muted); border-top: 10px solid transparent; border-bottom: 10px solid transparent;
}
.howto__body { padding: 16px 18px 18px; }
.howto__body h3 { font-size: 1.08rem; margin: 10px 0 .25em; }
.howto__body p { margin: 0; color: var(--muted); font-size: .92rem; }

/* FAQ */
.faq { display: grid; gap: 10px; }
.faq details { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; }
.faq summary {
  cursor: pointer; list-style: none; padding: 16px 48px 16px 18px; font-weight: 650; position: relative;
  min-height: 48px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 18px; top: 50%; transform: translateY(-50%);
  font: 500 1.4rem/1 var(--mono); color: var(--accent);
}
.faq details[open] summary::after { content: "−"; }
.faq details p { padding: 0 18px 16px; margin: 0; color: var(--muted); }

/* Footer */
.footer { padding: 36px 0 calc(40px + env(safe-area-inset-bottom)); }
.footer__inner { display: grid; gap: 14px; }
.footer__brand { display: flex; align-items: center; gap: 10px; font-weight: 750; }
.footer__links { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px 20px; }
.footer .fine { margin: 0; }

/* Larger screens -------------------------------------------------------- */
@media (min-width: 640px) {
  .install__buttons { flex-direction: row; flex-wrap: wrap; }
  .btn { flex: 1 1 240px; }
  .steps { grid-template-columns: 1fr 1fr; }
  .cards { grid-template-columns: 1fr 1fr; }
  .howto { grid-template-columns: 1fr 1fr; }
  .roster__grid { grid-template-columns: repeat(4, 1fr); }
}
@media (min-width: 900px) {
  .nav li:not(:last-child) { display: block; }
  .hero { padding: 72px 0 88px; }
  .hero__grid { grid-template-columns: 1.15fr .85fr; align-items: center; gap: 56px; }
  .steps { grid-template-columns: repeat(4, 1fr); }
  .step { padding: 64px 20px 20px; }
  .split { grid-template-columns: 1.1fr .9fr; }
  .roster__grid { grid-template-columns: repeat(2, 1fr); }
  .howto { grid-template-columns: repeat(4, 1fr); }
  .footer__inner { grid-template-columns: auto 1fr auto; align-items: center; }
  .footer__links { justify-content: center; }
}

/* Motion ---------------------------------------------------------------- */
@keyframes talk { 0%, 100% { height: 18%; } 50% { height: 92%; } }
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(74, 222, 128, .55); }
  70% { box-shadow: 0 0 0 8px rgba(74, 222, 128, 0); }
  100% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .wave i:nth-child(odd) { height: 70%; }
  .wave i:nth-child(3n) { height: 45%; }
}

@media (max-width: 639px) {
  .howto__media { aspect-ratio: 21 / 8; }
}