/* Ported verbatim from reference-implementation.html per BUILD_BRIEF.md §4/§7 — do not restyle. */

:root{
  --bg: #EDEAE1;
  --surface: #F8F6F0;
  --surface-2: #E2DDCE;
  --ink: #1C1912;
  --ink-muted: #746E5C;
  --ink-faint: #A39C89;
  --line: #D9D3C1;
  --accent: #A85A17;
  --accent-soft: #C97A2E;
  --accent-2: #1B7A61;
  --accent-2-soft: #2E9678;
  --shadow: 0 1px 2px rgba(28,25,18,.06), 0 8px 24px -12px rgba(28,25,18,.18);
  --radius: 14px;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg: #131109;
    --surface: #1C1911;
    --surface-2: #29241A;
    --ink: #F3EFE4;
    --ink-muted: #A79E88;
    --ink-faint: #766E59;
    --line: #322C1F;
    --accent: #E3A233;
    --accent-soft: #C9863A;
    --accent-2: #35B08F;
    --accent-2-soft: #2A8E72;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 12px 32px -16px rgba(0,0,0,.6);
  }
}
:root[data-theme="dark"]{
  --bg: #131109;
  --surface: #1C1911;
  --surface-2: #29241A;
  --ink: #F3EFE4;
  --ink-muted: #A79E88;
  --ink-faint: #766E59;
  --line: #322C1F;
  --accent: #E3A233;
  --accent-soft: #C9863A;
  --accent-2: #35B08F;
  --accent-2-soft: #2A8E72;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 12px 32px -16px rgba(0,0,0,.6);
}

*{ box-sizing: border-box; }
body{
  background: var(--bg);
  color: var(--ink);
  font-family: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 18px 60px;
  margin: 0;
}
.mono{ font-family: "IBM Plex Mono", ui-monospace, monospace; }

.wrap{ width: 100%; max-width: 640px; }

header.top{
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 28px; color: var(--ink-muted);
}
.mark{ display:flex; align-items:flex-end; gap:3px; height: 18px; }
.mark i{ display:block; width: 4px; border-radius: 2px; background: var(--accent); }
.mark i:nth-child(1){ height: 40%; }
.mark i:nth-child(2){ height: 65%; }
.mark i:nth-child(3){ height: 100%; }
.mark i:nth-child(4){ height: 55%; }
.mark i:nth-child(5){ height: 80%; }
header.top span{ font-size: 13px; letter-spacing: .06em; text-transform: uppercase; font-family:"IBM Plex Mono",monospace; }

.card{
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 40px 34px;
}
@media (max-width: 480px){ .card{ padding: 30px 20px; } }

h1{
  font-size: 30px; line-height: 1.15; margin: 0 0 14px;
  letter-spacing: -.01em; text-wrap: balance;
}
.lede{ color: var(--ink-muted); font-size: 16px; line-height: 1.55; margin: 0 0 26px; max-width: 46ch; }

.bars-hero{ display:flex; align-items:flex-end; gap:7px; height:64px; margin: 4px 0 30px; }
.bars-hero i{
  flex: 1; border-radius: 4px 4px 0 0;
  background: linear-gradient(180deg, var(--accent-soft), var(--accent));
  animation: pulse 2.4s ease-in-out infinite;
}
.bars-hero i:nth-child(1){ height: 35%; animation-delay: -.1s; }
.bars-hero i:nth-child(2){ height: 62%; animation-delay: -.6s; }
.bars-hero i:nth-child(3){ height: 100%; animation-delay: -1.1s; background: linear-gradient(180deg, var(--accent-2-soft), var(--accent-2)); }
.bars-hero i:nth-child(4){ height: 48%; animation-delay: -.3s; }
.bars-hero i:nth-child(5){ height: 78%; animation-delay: -.9s; }
@media (prefers-reduced-motion: reduce){ .bars-hero i{ animation: none; } }
@keyframes pulse{ 0%,100%{ opacity:1; transform: scaleY(1); } 50%{ opacity:.72; transform: scaleY(.86); } }

.meta-row{ display:flex; gap: 22px; margin: 0 0 30px; flex-wrap: wrap; }
.meta-row div{ font-size: 13px; color: var(--ink-faint); font-family:"IBM Plex Mono",monospace; }
.meta-row b{ color: var(--ink-muted); font-weight: 600; }

button.primary{
  appearance: none; border: none; cursor: pointer;
  background: var(--ink); color: var(--bg);
  font: inherit; font-weight: 600; font-size: 16px;
  padding: 14px 26px; border-radius: 999px;
  display: inline-flex; align-items: center; gap: 10px;
  transition: transform .15s ease, opacity .15s ease;
}
button.primary:hover{ opacity: .88; }
button.primary:active{ transform: scale(.98); }
button.primary:focus-visible{ outline: 2px solid var(--accent); outline-offset: 3px; }

button.ghost{
  appearance:none; border:1px solid var(--line); background: transparent; color: var(--ink-muted);
  font: inherit; font-size: 14px; padding: 10px 18px; border-radius: 999px; cursor: pointer;
}
button.ghost:hover{ border-color: var(--ink-faint); color: var(--ink); }
button.ghost:focus-visible{ outline: 2px solid var(--accent); outline-offset: 2px; }

/* progress */
.progress-block{ margin-bottom: 26px; }
.progress-top{
  display:flex; justify-content: space-between; align-items:baseline;
  margin-bottom: 10px; font-family:"IBM Plex Mono",monospace;
}
.progress-top .qnum{ font-size: 13px; color: var(--ink-muted); letter-spacing:.04em; text-transform: uppercase; }
.progress-top .cat{ font-size: 13px; color: var(--accent); font-weight: 600; }
.segments{ display:flex; gap: 10px; }
.seg-group{ display:flex; gap: 3px; flex: 1; }
.seg{ flex:1; height: 6px; border-radius: 3px; background: var(--surface-2); overflow:hidden; }
.seg i{ display:block; height:100%; width:0%; background: var(--accent); transition: width .3s ease; border-radius: 3px; }
.seg.filled i{ width: 100%; }
.seg.current i{ width: 55%; }

.qtext{ font-size: 21px; line-height:1.4; margin: 0 0 22px; text-wrap: balance; }

.options{ display:flex; flex-direction:column; gap: 10px; }
.opt{
  text-align:left; width:100%;
  background: var(--surface); border:1px solid var(--line); border-radius: 10px;
  padding: 15px 18px; font: inherit; font-size: 15px; color: var(--ink);
  cursor:pointer; line-height:1.45;
  transition: border-color .15s ease, background .15s ease, transform .1s ease;
}
.opt:hover{ border-color: var(--accent-soft); }
.opt:focus-visible{ outline: 2px solid var(--accent); outline-offset: 2px; }
.opt.selected{ border-color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, var(--surface)); }
.opt.selected::before{ content:"→ "; color: var(--accent); font-weight:700; }

.backlink{
  display:inline-flex; align-items:center; gap:6px; background:none; border:none; cursor:pointer;
  color: var(--ink-faint); font-family:"IBM Plex Mono",monospace; font-size: 12px; padding:0 0 18px; letter-spacing:.03em;
}
.backlink:hover{ color: var(--ink-muted); }

/* results */
.tier-badge{
  display:inline-flex; align-items:center; gap:8px;
  font-family:"IBM Plex Mono",monospace; font-size: 12px; font-weight:600;
  letter-spacing:.08em; text-transform:uppercase;
  padding: 6px 12px; border-radius: 999px; margin-bottom: 18px;
}
.tier-badge .dot{ width:7px; height:7px; border-radius:50%; }

.score-row{ display:flex; align-items:flex-end; gap: 16px; margin: 6px 0 6px; }
.score-num{ font-family:"IBM Plex Mono",monospace; font-size: 64px; font-weight: 700; line-height:1; letter-spacing:-.02em; }
.score-max{ font-family:"IBM Plex Mono",monospace; font-size: 20px; color: var(--ink-faint); padding-bottom: 8px; }

.tier-blurb{ color: var(--ink-muted); font-size: 15px; line-height:1.6; margin: 10px 0 32px; max-width: 52ch; }

.cat-list{ display:flex; flex-direction:column; gap: 16px; margin-bottom: 30px; }
.cat-row .cat-head{ display:flex; justify-content:space-between; margin-bottom: 6px; font-size: 13.5px; }
.cat-row .cat-head .name{ color: var(--ink); font-weight:600; }
.cat-row .cat-head .val{ font-family:"IBM Plex Mono",monospace; color: var(--ink-muted); }
.meter{ height: 8px; background: var(--surface-2); border-radius: 4px; overflow:hidden; }
.meter i{ display:block; height:100%; border-radius:4px; background: var(--accent); }

.leak-card{
  border: 1px solid var(--line); border-left: 3px solid var(--accent);
  background: var(--surface-2); border-radius: 10px; padding: 20px 22px; margin-bottom: 30px;
}
.leak-card .label{ font-family:"IBM Plex Mono",monospace; font-size: 11.5px; letter-spacing:.08em; text-transform:uppercase; color: var(--accent); margin-bottom:8px; font-weight:700; }
.leak-card h3{ margin: 0 0 8px; font-size: 17px; }
.leak-card p{ margin: 0 0 12px; color: var(--ink-muted); font-size: 14.5px; line-height: 1.55; }
.leak-card .fix{ font-size: 14px; color: var(--ink); background: var(--surface); border-radius:8px; padding: 12px 14px; line-height:1.5; }
.leak-card .fix b{ color: var(--accent); }

.cta-block{ border-top: 1px solid var(--line); padding-top: 26px; margin-bottom: 8px; }
.cta-block p{ color: var(--ink-muted); font-size: 14.5px; line-height:1.6; margin: 0 0 16px; max-width: 50ch; }
.cta-actions{ display:flex; gap: 10px; flex-wrap: wrap; align-items:center; }

.footer-note{
  margin-top: 22px; text-align:center; color: var(--ink-faint);
  font-family:"IBM Plex Mono",monospace; font-size: 12px; line-height:1.6;
}
.footer-note a{ color: var(--ink-muted); }

/* landing */
.land-bullets{ display:flex; flex-direction:column; gap: 16px; margin: 0 0 32px; }
.land-bullet{ display:flex; gap: 14px; align-items:flex-start; }
.land-bullet .num{
  font-family:"IBM Plex Mono",monospace; font-size: 12px; font-weight:700; color: var(--accent);
  border: 1px solid var(--line); border-radius: 6px; width: 28px; height: 28px; flex: none;
  display:flex; align-items:center; justify-content:center; margin-top: 1px;
}
.land-bullet p{ margin: 0; font-size: 15px; line-height: 1.55; color: var(--ink); }

/* gate */
.gate-lede{ color: var(--ink-muted); font-size: 15px; line-height:1.6; margin: 0 0 26px; max-width: 48ch; }
.field{ margin-bottom: 16px; }
.field label{
  display:block; font-family:"IBM Plex Mono",monospace; font-size: 11.5px; letter-spacing:.06em;
  text-transform: uppercase; color: var(--ink-faint); margin-bottom: 7px;
}
.field input{
  width:100%; font: inherit; font-size: 16px; color: var(--ink); background: var(--surface);
  border: 1px solid var(--line); border-radius: 10px; padding: 13px 15px;
}
.field input:focus-visible{ outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
.field .err{ display:block; color: var(--accent); font-size: 12.5px; margin-top: 6px; min-height: 1px; }
.gate-trust{ color: var(--ink-faint); font-size: 12.5px; margin-top: 16px; font-family:"IBM Plex Mono",monospace; }

/* results capture card */
.capture-card{
  border: 1px solid var(--line); border-left: 3px solid var(--accent-2);
  background: var(--surface-2); border-radius: 10px; padding: 20px 22px; margin-bottom: 22px;
}
.capture-card h3{ margin: 0 0 6px; font-size: 17px; }
.capture-card .lede2{ margin: 0 0 16px; color: var(--ink-muted); font-size: 14.5px; line-height: 1.55; max-width: 46ch; }
.capture-actions{ display:flex; gap: 10px; align-items:center; flex-wrap: wrap; }
.capture-success{ display:flex; align-items:center; gap: 10px; color: var(--accent-2); font-weight: 600; font-size: 15px; }
.capture-success .check{
  width: 22px; height: 22px; border-radius: 50%; background: var(--accent-2); color: var(--surface);
  display:flex; align-items:center; justify-content:center; font-size: 12px; flex: none;
}
button.primary[disabled]{ opacity: .6; cursor: default; }
.secondary-link{ display:inline-block; margin-top: 6px; font-size: 12.5px; color: var(--ink-faint); }
.secondary-link:hover{ color: var(--ink-muted); }

[hidden]{ display:none !important; }