/* ─────────────────────────────────────────────────────────────
   Triage — refined product UI.
   Warm-neutral palette (sand / terracotta / ink), system sans,
   generous whitespace, soft elevation. Pairs with the
   neo-brutalist README banner but doesn't share its language.
   ───────────────────────────────────────────────────────────── */

:root {
  /* Surfaces */
  --bg: #FAF6F1;
  --surface: #FFFFFF;
  --surface-2: #F4EFE8;
  --surface-3: #ECE5DB;

  /* Text */
  --ink: #1A1817;
  --ink-2: #4A4540;
  --muted: #7A746C;
  --faint: #B5AFA7;

  /* Accent (Anthropic-adjacent terracotta) */
  --accent: #C95C3C;
  --accent-2: #B14E2F;
  --accent-soft: #F4DCD2;
  --accent-tint: rgba(201, 92, 60, 0.08);

  /* Semantic */
  --success: #4A7C59;
  --warn: #C4843D;
  --danger: #B53B3B;

  /* Borders & shadows */
  --line: rgba(26, 24, 23, 0.08);
  --line-strong: rgba(26, 24, 23, 0.14);
  --shadow-sm: 0 1px 2px rgba(26, 24, 23, 0.04), 0 1px 1px rgba(26, 24, 23, 0.03);
  --shadow-md: 0 4px 12px rgba(26, 24, 23, 0.05), 0 2px 4px rgba(26, 24, 23, 0.04);
  --shadow-lg: 0 20px 40px -12px rgba(26, 24, 23, 0.12), 0 8px 16px -8px rgba(26, 24, 23, 0.06);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter", "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 999px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0F0E0D;
    --surface: #1A1817;
    --surface-2: #221F1D;
    --surface-3: #2A2724;

    --ink: #F2EDE6;
    --ink-2: #C9C2BA;
    --muted: #8E867D;
    --faint: #5E574F;

    --accent: #E8896B;
    --accent-2: #F4A088;
    --accent-soft: rgba(232, 137, 107, 0.15);
    --accent-tint: rgba(232, 137, 107, 0.08);

    --line: rgba(242, 237, 230, 0.08);
    --line-strong: rgba(242, 237, 230, 0.14);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 20px 40px -12px rgba(0, 0, 0, 0.5), 0 8px 16px -8px rgba(0, 0, 0, 0.3);
  }
}

/* ─── Reset / base ─────────────────────────────────────────── */

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  font-feature-settings: "ss01", "cv11";
  letter-spacing: -0.005em;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s var(--ease);
}
a:hover { color: var(--accent-2); }

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
}

::selection { background: var(--accent-soft); color: var(--ink); }

/* ─── Layout ───────────────────────────────────────────────── */

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 28px;
}
@media (max-width: 640px) {
  .container { padding: 0 20px; }
}

/* ─── Nav ──────────────────────────────────────────────────── */

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 60px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 600;
  letter-spacing: -0.01em;
}
.brand:hover { color: var(--ink); }
.brand__mark { color: var(--accent); display: inline-flex; }
.brand__name { font-size: 17px; }

.nav__links {
  display: flex;
  gap: 28px;
  font-size: 14px;
}
.nav__links a {
  color: var(--ink-2);
  font-weight: 500;
}
.nav__links a:hover { color: var(--ink); }
@media (max-width: 560px) {
  .nav__links a:nth-child(2) { display: none; }
  .nav__links { gap: 18px; }
}

/* ─── Hero ─────────────────────────────────────────────────── */

.hero {
  padding: clamp(56px, 9vw, 112px) 0 clamp(40px, 6vw, 72px);
}
.hero__inner {
  max-width: 780px;
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-2);
  box-shadow: var(--shadow-sm);
}
.pill__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-tint);
  animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px var(--accent-tint); }
  50% { box-shadow: 0 0 0 8px transparent; }
}

.display {
  font-size: clamp(40px, 6.4vw, 64px);
  line-height: 1.04;
  letter-spacing: -0.035em;
  font-weight: 600;
  margin: 24px 0 22px;
  color: var(--ink);
}
.display__accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-style: italic;
  font-weight: 500;
}

.lede {
  font-size: clamp(17px, 1.7vw, 20px);
  line-height: 1.55;
  color: var(--ink-2);
  margin: 0;
  max-width: 640px;
}

/* ─── App ──────────────────────────────────────────────────── */

.app { padding: 8px 0 96px; }

.setup {
  margin-bottom: 24px;
}
.setup__details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.setup__details[open] { box-shadow: var(--shadow-md); }
.setup__summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  cursor: pointer;
  list-style: none;
  transition: background 0.15s var(--ease);
}
.setup__summary:hover { background: var(--surface-2); }
.setup__summary::-webkit-details-marker { display: none; }
.setup__label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  color: var(--ink);
  font-size: 14px;
}
.setup__hint {
  font-size: 13px;
  color: var(--muted);
}
.setup__body {
  padding: 0 18px 18px;
  border-top: 1px solid var(--line);
}
.setup__copy {
  font-size: 13.5px;
  color: var(--ink-2);
  line-height: 1.55;
  margin: 16px 0 12px;
}
.setup__copy code {
  background: var(--surface-2);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink);
}
.setup__row {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
.setup__row input {
  flex: 1;
  min-width: 220px;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  transition: border-color 0.15s var(--ease), box-shadow 0.15s var(--ease);
}
.setup__row input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-tint);
}

/* ─── Grid ─────────────────────────────────────────────────── */

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
@media (max-width: 880px) {
  .grid { grid-template-columns: 1fr; }
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s var(--ease);
}
.panel:hover { box-shadow: var(--shadow-md); }
.panel--result {
  background: var(--surface-2);
  border-color: var(--line);
}
.panel__head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
}
.panel__kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 4px;
}
.panel__title {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: 0;
  color: var(--ink);
}
.panel__foot {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.link {
  background: transparent;
  border: none;
  color: var(--accent);
  font-weight: 500;
  font-size: 13.5px;
  padding: 4px 6px;
  margin: -4px -6px;
  border-radius: var(--radius-sm);
  transition: background 0.15s var(--ease);
}
.link:not([disabled]):hover { background: var(--accent-tint); }
.link[disabled] { opacity: 0.4; cursor: not-allowed; }

textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.65;
  resize: vertical;
  min-height: 200px;
  transition: border-color 0.15s var(--ease), box-shadow 0.15s var(--ease);
}
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-tint);
}
textarea::placeholder { color: var(--faint); }

/* ─── Buttons ──────────────────────────────────────────────── */

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-weight: 500;
  font-size: 14px;
  letter-spacing: -0.005em;
  cursor: pointer;
  transition: background 0.15s var(--ease), color 0.15s var(--ease),
              border-color 0.15s var(--ease), transform 0.06s var(--ease),
              box-shadow 0.15s var(--ease);
  white-space: nowrap;
}
.btn[disabled] { opacity: 0.55; cursor: not-allowed; }

.btn--primary {
  background: var(--ink);
  color: var(--bg);
  box-shadow: var(--shadow-sm);
}
.btn--primary:not([disabled]):hover {
  background: var(--accent);
  color: #FFFFFF;
  box-shadow: var(--shadow-md);
}
.btn--primary:not([disabled]):active { transform: translateY(1px); }
.btn--primary .btn__icon { transition: transform 0.15s var(--ease); }
.btn--primary:not([disabled]):hover .btn__icon { transform: translateX(2px); }

.btn--ghost {
  background: transparent;
  color: var(--ink-2);
  border-color: var(--line-strong);
}
.btn--ghost:not([disabled]):hover {
  background: var(--surface);
  color: var(--ink);
  border-color: var(--line-strong);
}

.btn--sm {
  padding: 6px 12px;
  font-size: 13px;
  border-radius: var(--radius-sm);
}

.btn__spinner {
  display: none;
  width: 14px;
  height: 14px;
  border: 2px solid currentColor;
  border-bottom-color: transparent;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.btn.is-loading .btn__label,
.btn.is-loading .btn__icon { opacity: 0.4; }
.btn.is-loading .btn__spinner {
  display: inline-block;
  position: absolute;
  left: 50%;
  top: 50%;
  margin: -7px 0 0 -7px;
}

.status {
  font-size: 13px;
  color: var(--muted);
  font-feature-settings: "tnum";
}
.status.error { color: var(--danger); }
.status.ok { color: var(--success); }

/* ─── Output ───────────────────────────────────────────────── */

.output { min-height: 280px; }

.empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 56px 24px;
  color: var(--muted);
}
.empty__icon {
  color: var(--faint);
  margin-bottom: 14px;
}
.empty__title {
  margin: 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-2);
}
.empty__copy {
  margin: 6px 0 0;
  font-size: 13.5px;
}
.empty__copy strong {
  color: var(--ink);
  font-weight: 600;
}

/* ─── Result cards ─────────────────────────────────────────── */

.result {
  display: grid;
  gap: 12px;
  animation: fade-in 0.35s var(--ease);
}
@keyframes fade-in {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.result__top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
@media (max-width: 520px) {
  .result__top { grid-template-columns: 1fr; }
}

.metric {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 14px 16px;
}
.metric__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
  display: block;
}
.metric__value {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 10px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: -0.005em;
}
.badge--category {
  background: var(--accent-tint);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
}
.badge--urgency-high { background: rgba(181, 59, 59, 0.1); color: var(--danger); }
.badge--urgency-normal { background: var(--surface-2); color: var(--ink-2); }
.badge--urgency-low { background: var(--surface-2); color: var(--muted); }
.badge--flag {
  background: var(--surface-2);
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 11.5px;
}

.confidence {
  display: flex;
  align-items: center;
  gap: 12px;
}
.confidence__bar {
  flex: 1;
  height: 6px;
  background: var(--surface-2);
  border-radius: var(--radius-pill);
  overflow: hidden;
}
.confidence__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: inherit;
  transition: width 0.4s var(--ease);
}
.confidence__pct {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  min-width: 44px;
  text-align: right;
}

.row {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 14px 16px;
}
.row__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  display: block;
  margin-bottom: 6px;
}
.row__value {
  color: var(--ink);
  font-size: 14.5px;
  line-height: 1.55;
}
.flags-row { display: flex; flex-wrap: wrap; gap: 6px; }

/* Suggested reply card — styled like an email draft */
.reply {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.reply__head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}
.reply__head::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}
.reply__body {
  padding: 18px 20px;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--ink);
  white-space: pre-wrap;
  font-family: var(--font-sans);
}

/* ─── How it works ─────────────────────────────────────────── */

.how {
  padding: 96px 0;
  background: var(--surface-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
}
.section-title {
  font-size: clamp(28px, 4vw, 38px);
  letter-spacing: -0.025em;
  font-weight: 600;
  margin: 10px 0 16px;
  max-width: 560px;
  color: var(--ink);
  line-height: 1.15;
}
.section-lede {
  font-size: 17px;
  color: var(--ink-2);
  max-width: 600px;
  margin: 0 0 40px;
  line-height: 1.55;
}

.rules {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  list-style: none;
  padding: 0;
  margin: 0;
}
@media (max-width: 720px) { .rules { grid-template-columns: 1fr; } }

.rule {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: start;
}
.rule__num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.rule__title {
  font-size: 16px;
  font-weight: 600;
  margin: 4px 0 6px;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.rule p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink-2);
}
.rule code {
  font-family: var(--font-mono);
  font-size: 12.5px;
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 1px 6px;
  border-radius: 4px;
  color: var(--ink);
}

/* ─── About ────────────────────────────────────────────────── */

.about { padding: 96px 0; }
.about__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 56px;
  align-items: start;
}
@media (max-width: 880px) {
  .about__grid { grid-template-columns: 1fr; gap: 36px; }
}

.cta-row {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.stats {
  display: grid;
  gap: 24px;
  list-style: none;
  padding: 28px;
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.stats li {
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}
.stats li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.stats__num {
  display: block;
  font-size: 36px;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--ink);
  font-feature-settings: "tnum";
  line-height: 1;
}
.stats__label {
  display: block;
  font-size: 13.5px;
  color: var(--muted);
  margin-top: 8px;
  line-height: 1.5;
}

/* ─── Footer ───────────────────────────────────────────────── */

.foot {
  padding: 36px 0;
  border-top: 1px solid var(--line);
  background: var(--bg);
  font-size: 13.5px;
  color: var(--muted);
}
.foot__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.foot__links {
  display: flex;
  gap: 22px;
}
.foot__links a {
  color: var(--muted);
}
.foot__links a:hover { color: var(--ink); }

/* ─── Focus visible ────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline-offset: 3px;
}

/* ─── Reduced motion ───────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}