:root {
  color-scheme: dark;
  --ink: #07111f;
  --ink-soft: #0d1a2b;
  --panel: #101f32;
  --panel-2: #13263c;
  --line: rgba(185, 213, 230, 0.14);
  --muted: #94a9bb;
  --text: #f0f6f8;
  --mint: #6de6c3;
  --mint-2: #39cfa7;
  --amber: #ffbd69;
  --danger: #ff7d75;
  --radius-lg: 24px;
  --radius-md: 15px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background:
    radial-gradient(circle at 82% 12%, rgba(64, 211, 171, .12), transparent 30rem),
    radial-gradient(circle at 5% 42%, rgba(62, 137, 210, .10), transparent 28rem),
    var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}
button, textarea { font: inherit; }
button { color: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.topbar {
  height: 74px;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.brand { color: var(--text); text-decoration: none; display: inline-flex; gap: 11px; align-items: center; font-size: 1.08rem; font-weight: 760; letter-spacing: -.02em; }
.brand-mark { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 10px; color: var(--ink); background: var(--mint); font-weight: 900; }
.privacy-pill { display: inline-flex; align-items: center; gap: 8px; padding: 7px 12px; border: 1px solid var(--line); border-radius: 999px; color: #bdd0dd; font-size: .82rem; }
.privacy-pill span { width: 7px; height: 7px; background: var(--mint); border-radius: 50%; box-shadow: 0 0 14px rgba(109,230,195,.8); }

main { max-width: 1240px; margin: 0 auto; padding: 58px 28px 72px; }
.intro { max-width: 760px; margin-bottom: 34px; }
.eyebrow { margin: 0 0 12px; color: var(--mint); font-size: .75rem; font-weight: 800; letter-spacing: .16em; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 14px; max-width: 720px; font-size: clamp(2.4rem, 5vw, 4.6rem); line-height: .99; letter-spacing: -.055em; font-weight: 790; }
.lede { max-width: 710px; margin-bottom: 0; color: #a9bdcb; font-size: 1.05rem; }

.workspace { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(340px, .75fr); gap: 18px; align-items: stretch; }
.editor-panel, .result-panel { border: 1px solid var(--line); border-radius: var(--radius-lg); background: rgba(16,31,50,.88); box-shadow: 0 28px 70px rgba(0,0,0,.18); }
.editor-panel { padding: 20px; }
.source-tabs { display: inline-flex; gap: 4px; padding: 4px; margin-bottom: 18px; border: 1px solid var(--line); border-radius: 11px; background: rgba(5,15,27,.48); }
.source-tab { padding: 8px 13px; border: 0; border-radius: 8px; background: transparent; color: var(--muted); cursor: pointer; font-size: .84rem; font-weight: 700; }
.source-tab.active { color: #081710; background: var(--mint); }
.source-tab:focus-visible { outline: 2px solid var(--mint); outline-offset: 2px; }
.panel-head, .editor-foot, .result-topline { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.panel-head { margin-bottom: 13px; }
.panel-head label { font-weight: 720; }
.text-actions { display: flex; gap: 6px; }
.quiet-button { padding: 7px 10px; background: transparent; border: 0; color: var(--muted); border-radius: 8px; cursor: pointer; font-size: .82rem; }
.quiet-button:hover, .quiet-button:focus-visible { background: rgba(255,255,255,.06); color: var(--text); }
textarea { width: 100%; height: 330px; resize: vertical; min-height: 240px; padding: 19px 20px; color: #eaf2f5; background: #0a1727; border: 1px solid rgba(180,210,226,.16); border-radius: var(--radius-md); outline: none; line-height: 1.7; font-size: 1rem; transition: border-color .2s, box-shadow .2s; }
textarea::placeholder { color: #60798c; }
textarea:focus { border-color: rgba(109,230,195,.65); box-shadow: 0 0 0 4px rgba(109,230,195,.07); }
.upload-zone { min-height: 250px; padding: 30px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 7px; text-align: center; border: 1px dashed rgba(109,230,195,.45); border-radius: var(--radius-md); background: #0a1727; cursor: pointer; transition: border-color .18s, background .18s, transform .18s; }
.upload-zone:hover, .upload-zone.dragging { border-color: var(--mint); background: rgba(19,52,58,.58); }
.upload-zone.dragging { transform: scale(.995); }
.upload-zone strong { font-size: 1rem; }
.upload-zone > span:last-child { color: var(--muted); font-size: .82rem; }
.upload-icon { width: 52px; height: 52px; margin-bottom: 10px; display: grid; place-items: center; border-radius: 16px; color: var(--mint); background: rgba(109,230,195,.09); border: 1px solid rgba(109,230,195,.18); font-size: 1.7rem; }
.file-card { min-height: 92px; padding: 16px; grid-template-columns: 52px 1fr auto; gap: 14px; align-items: center; border: 1px solid rgba(109,230,195,.25); border-radius: var(--radius-md); background: #0a1727; }
.file-card:not([hidden]) { display: grid; }
.file-badge { width: 52px; height: 52px; display: grid; place-items: center; border-radius: 12px; background: rgba(109,230,195,.11); color: var(--mint); font-size: .72rem; font-weight: 850; letter-spacing: .06em; }
.file-meta { min-width: 0; display: flex; flex-direction: column; }
.file-meta strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-meta span { color: var(--muted); font-size: .8rem; }
.remove-file { width: 34px; height: 34px; border: 1px solid var(--line); border-radius: 9px; background: transparent; color: var(--muted); cursor: pointer; font-size: 1.25rem; }
.remove-file:hover { color: var(--text); background: rgba(255,255,255,.05); }
.extract-preview { margin-top: 12px; padding: 13px 15px; border: 1px solid var(--line); border-radius: 12px; background: rgba(6,17,31,.38); }
.extract-preview > span { color: var(--mint); font-size: .74rem; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.extract-preview p { max-height: 112px; margin: 7px 0 0; overflow: hidden; color: #b4c5d0; font-size: .82rem; line-height: 1.55; white-space: pre-wrap; }
.editor-foot { margin-top: 14px; }
.editor-foot p { margin: 0; display: flex; flex-direction: column; color: var(--muted); font-size: .78rem; }
.editor-foot strong { color: #c9d9e3; font-size: .86rem; }
.primary-button { min-height: 48px; padding: 0 19px; display: inline-flex; align-items: center; justify-content: center; gap: 24px; border: 0; border-radius: 12px; background: var(--mint); color: #061511; font-weight: 780; cursor: pointer; box-shadow: 0 10px 30px rgba(57,207,167,.15); transition: transform .18s, background .18s; }
.primary-button:hover { transform: translateY(-1px); background: #81edd0; }
.primary-button:disabled { opacity: .55; cursor: wait; transform: none; }
.primary-button:focus-visible { outline: 3px solid rgba(109,230,195,.35); outline-offset: 3px; }
.input-error { color: #ffaaa4; margin: 12px 2px 0; font-size: .88rem; }

.result-panel { min-height: 470px; padding: 24px; overflow: hidden; position: relative; }
.result-panel::before { content: ""; position: absolute; width: 230px; height: 230px; right: -100px; top: -110px; border: 1px solid rgba(109,230,195,.12); border-radius: 50%; }
.empty-state { height: 100%; min-height: 420px; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.empty-state h2 { font-size: 1.2rem; margin: 22px 0 7px; }
.empty-state p { max-width: 290px; color: var(--muted); font-size: .9rem; }
.empty-orbit { width: 70px; height: 70px; border: 1px solid rgba(109,230,195,.35); border-radius: 50%; display: grid; place-items: center; position: relative; }
.empty-orbit::before { content: ""; width: 38px; height: 38px; border: 1px solid rgba(109,230,195,.18); border-radius: 50%; }
.empty-orbit span { position: absolute; top: 4px; width: 9px; height: 9px; background: var(--mint); border-radius: 50%; box-shadow: 0 0 15px rgba(109,230,195,.8); }
.result-content { position: relative; z-index: 1; }
.result-label { color: var(--muted); text-transform: uppercase; font-size: .72rem; letter-spacing: .12em; font-weight: 800; }
.confidence { padding: 5px 9px; border-radius: 999px; background: rgba(109,230,195,.08); color: var(--mint); font-size: .72rem; }
.score-row { display: grid; grid-template-columns: 132px 1fr; gap: 20px; align-items: center; margin: 28px 0 25px; }
.score-ring { --score: 0deg; width: 132px; aspect-ratio: 1; border-radius: 50%; display: grid; place-items: center; background: conic-gradient(var(--ring-color, var(--mint)) var(--score), rgba(255,255,255,.08) 0); position: relative; }
.score-ring::after { content: ""; width: 104px; aspect-ratio: 1; position: absolute; background: var(--panel); border-radius: 50%; }
.score-ring div { position: relative; z-index: 1; line-height: 1; }
.score-ring strong { font-size: 2.45rem; letter-spacing: -.06em; }
.score-ring span { color: var(--muted); margin-left: 2px; }
.score-copy h2 { margin-bottom: 6px; font-size: 1.35rem; letter-spacing: -.025em; }
.score-copy p { margin: 0; color: var(--muted); font-size: .88rem; }
.signal-list { display: grid; gap: 9px; }
.signal { display: grid; grid-template-columns: 1fr auto; gap: 8px 14px; padding: 11px 12px; border: 1px solid var(--line); border-radius: 11px; background: rgba(6,17,31,.34); }
.signal-name { font-size: .86rem; font-weight: 680; }
.signal-value { font-size: .78rem; color: var(--signal-color, var(--muted)); }
.signal-track { grid-column: 1 / -1; height: 3px; border-radius: 3px; background: rgba(255,255,255,.07); overflow: hidden; }
.signal-track span { display: block; height: 100%; width: var(--width); background: var(--signal-color, var(--mint)); border-radius: inherit; }
.notice { margin-top: 15px; padding: 12px 14px; border-left: 3px solid var(--amber); background: rgba(255,189,105,.07); color: #bdc9d1; font-size: .77rem; }
.notice strong, .notice span { display: block; }
.notice strong { color: #ffd298; margin-bottom: 2px; }

.explain { margin-top: 76px; padding-top: 32px; border-top: 1px solid var(--line); display: grid; grid-template-columns: .65fr 1.35fr; gap: 56px; }
.explain h2 { font-size: clamp(1.8rem, 3vw, 2.8rem); line-height: 1.05; letter-spacing: -.045em; }
.explain-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.explain-grid article { padding: 18px; min-height: 170px; border: 1px solid var(--line); border-radius: 15px; background: rgba(13,26,43,.55); }
.explain-grid article > span { color: var(--mint); font-size: .72rem; font-weight: 800; }
.explain-grid h3 { margin: 26px 0 7px; font-size: 1rem; }
.explain-grid p { margin: 0; color: var(--muted); font-size: .84rem; }
footer { max-width: 1240px; margin: 0 auto; padding: 24px 28px 34px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 24px; color: #73899a; font-size: .78rem; }
footer span { color: #b9cbd6; font-weight: 800; }
footer p { margin: 0; text-align: right; }

@media (max-width: 900px) {
  .workspace { grid-template-columns: 1fr; }
  .result-panel { min-height: 420px; }
  .explain { grid-template-columns: 1fr; gap: 20px; }
}
@media (max-width: 620px) {
  .topbar { height: 64px; padding: 0 18px; }
  .privacy-pill { font-size: 0; padding: 8px; }
  main { padding: 40px 16px 52px; }
  h1 { font-size: 2.55rem; }
  .intro { margin-bottom: 26px; }
  .editor-panel, .result-panel { border-radius: 18px; }
  .editor-panel { padding: 14px; }
  .source-tabs { width: 100%; }
  .source-tab { flex: 1; }
  .panel-head, .editor-foot { align-items: flex-start; }
  .editor-foot { flex-direction: column; }
  .primary-button { width: 100%; }
  textarea { height: 310px; padding: 15px; }
  .upload-zone { min-height: 230px; padding: 22px 16px; }
  .score-row { grid-template-columns: 104px 1fr; gap: 16px; }
  .score-ring { width: 104px; }
  .score-ring::after { width: 80px; }
  .score-ring strong { font-size: 2rem; }
  .explain-grid { grid-template-columns: 1fr; }
  .explain-grid article { min-height: 140px; }
  footer { margin: 0 16px; padding-inline: 0; flex-direction: column; }
  footer p { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}