:root {
  color-scheme: dark;
  --bg: #0c0d0f;
  --surface: #141619;
  --surface-raised: #1a1d20;
  --surface-soft: #111315;
  --border: #292d31;
  --border-strong: #3b4147;
  --text: #f0f2f3;
  --muted: #8d969e;
  --muted-strong: #b2bac0;
  --accent: #b8f45b;
  --accent-deep: #8fcb35;
  --accent-ink: #11160b;
  --warning: #f0b85b;
  --warning-soft: #2c2113;
  --mono: 'DM Mono', 'Cascadia Code', 'SFMono-Regular', Consolas, monospace;
  --sans: 'DM Sans', 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }
html { min-width: 320px; background: var(--bg); }
body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 50% -10%, rgba(184, 244, 91, .08), transparent 34rem),
    var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.5;
}
button, textarea { font: inherit; }
button { cursor: pointer; }
button:focus-visible, textarea:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.app-shell { width: min(1160px, calc(100% - 48px)); margin: 0 auto; padding: 74px 0 38px; }
.hero { max-width: 680px; margin: 0 auto 52px; text-align: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 11px;
  border: 1px solid rgba(184,244,91,.2); border-radius: 999px;
  background: rgba(184,244,91,.06); color: var(--accent); font: 500 11px var(--mono); letter-spacing: .02em; text-transform: uppercase;
}
.eyebrow-dot, .live-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(184,244,91,.1); }
.hero h1 { margin: 22px 0 16px; font-size: clamp(40px, 7vw, 76px); line-height: .98; letter-spacing: -.065em; font-weight: 700; }
.hero h1 span { color: var(--accent); }
.hero-copy { max-width: 530px; margin: 0 auto; color: var(--muted); font-size: 17px; line-height: 1.65; }
.hero-meta { display: flex; justify-content: center; align-items: center; gap: 11px; margin-top: 20px; color: var(--muted-strong); font: 400 11px var(--mono); }
.meta-separator { color: var(--border-strong); }

.workspace { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 14px; }
.panel { min-width: 0; overflow: hidden; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); box-shadow: 0 20px 50px rgba(0,0,0,.13); }
.panel-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 21px 22px 17px; border-bottom: 1px solid var(--border); }
.panel-kicker { display: block; color: var(--accent); font: 500 10px var(--mono); letter-spacing: .1em; }
.panel h2 { margin: 6px 0 0; font-size: 16px; line-height: 1.2; letter-spacing: -.015em; }
.text-button { border: 0; padding: 5px 0; background: transparent; color: var(--muted-strong); font-size: 12px; transition: color .15s ease; }
.text-button:hover { color: var(--accent); }
.live-indicator { display: inline-flex; align-items: center; gap: 9px; color: var(--accent); font: 400 11px var(--mono); }
textarea {
  display: block; width: 100%; height: 368px; resize: vertical; border: 0; border-bottom: 1px solid var(--border);
  padding: 20px 22px; background: var(--surface-soft); color: var(--text); font: 400 12px/1.75 var(--mono); tab-size: 2;
}
textarea::placeholder { color: #5d666d; }
textarea:focus { background: #121518; outline: 0; }
#output { color: #cfe9a5; }
.panel-footer { display: flex; justify-content: space-between; gap: 16px; padding: 11px 22px 13px; color: var(--muted); font: 400 10px var(--mono); }
.panel-actions { display: flex; gap: 9px; padding: 14px 22px 0; background: var(--surface-soft); }
.button { min-height: 36px; border: 1px solid transparent; border-radius: 6px; padding: 8px 13px; font-size: 12px; font-weight: 600; transition: background .15s ease, border-color .15s ease, color .15s ease, opacity .15s ease; }
.button:disabled { cursor: not-allowed; opacity: .35; }
.button-primary { background: var(--accent); color: var(--accent-ink); }
.button-primary:not(:disabled):hover { background: #c9fa7b; }
.button-secondary { border-color: var(--border-strong); background: transparent; color: var(--muted-strong); }
.button-secondary:not(:disabled):hover { border-color: var(--accent); color: var(--accent); }
.output-footer { background: var(--surface-soft); }
#stats { color: var(--muted-strong); }

.feedback-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 14px; margin-top: 14px; }
.detail-card { min-height: 113px; padding: 18px 20px; border: 1px solid var(--border); border-radius: 10px; background: rgba(20,22,25,.75); }
.detail-card-warning { border-color: #403522; }
.detail-heading { display: flex; align-items: center; gap: 9px; }
.detail-heading h2 { margin: 0; font-size: 13px; font-weight: 600; }
.detail-icon { display: inline-grid; place-items: center; width: 20px; height: 20px; border-radius: 50%; font: 600 12px var(--mono); }
.icon-recognized { background: rgba(184,244,91,.12); color: var(--accent); }
.icon-warning { background: var(--warning-soft); color: var(--warning); }
.detail-count { margin-left: auto; color: var(--muted); font: 400 11px var(--mono); }
.detail-card > p { margin: 12px 0 0 29px; color: var(--muted); font-size: 12px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 6px; margin: 12px 0 0 29px; }
.tag { max-width: 100%; overflow: hidden; border: 1px solid #524329; border-radius: 4px; padding: 3px 7px; background: var(--warning-soft); color: #e8c27b; font: 400 10px var(--mono); text-overflow: ellipsis; white-space: nowrap; }
.empty-detail { color: var(--muted); font: 400 11px var(--mono); }
.boundary-note { display: flex; gap: 12px; margin-top: 30px; padding: 16px 18px; border: 1px solid var(--border); border-radius: 8px; background: rgba(20,22,25,.5); }
.boundary-mark { flex: 0 0 auto; display: grid; place-items: center; width: 19px; height: 19px; border: 1px solid var(--border-strong); border-radius: 50%; color: var(--muted-strong); font: 500 11px var(--mono); }
.boundary-note p { margin: 0; color: var(--muted); font-size: 12px; }
.boundary-note strong { color: var(--muted-strong); }
.footer { display: flex; justify-content: space-between; gap: 16px; margin-top: 34px; color: #687177; font: 400 10px var(--mono); }
.footer em { color: var(--muted); font-style: normal; }
.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; }

@media (max-width: 900px) {
  .app-shell { padding-top: 52px; }
  .workspace, .feedback-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .app-shell { width: min(100% - 28px, 1160px); padding-top: 34px; }
  .hero { margin-bottom: 34px; }
  .hero-copy { font-size: 15px; }
  .hero-meta { flex-wrap: wrap; line-height: 1.4; }
  .meta-separator { display: none; }
  textarea { height: 310px; padding: 16px; }
  .panel-heading, .panel-footer, .panel-actions { padding-left: 16px; padding-right: 16px; }
  .panel-heading { align-items: flex-start; }
  .panel-actions { flex-wrap: wrap; }
  .button { flex: 1 1 130px; }
  .panel-footer { flex-wrap: wrap; }
  .footer { flex-direction: column; gap: 5px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}