/* ============================================================
   AI-to-Human Time Translator — TIMxAI Labs
   Design system: dark-primary, light-aware, system-font, motion-aware.
   ============================================================ */

:root {
  --bg: #0a0a0f;
  --bg-elev-1: #11111a;
  --bg-elev-2: #161622;
  --bg-elev-3: #1d1d2c;
  --border: #262635;
  --border-strong: #353548;
  --text: #e8e8f0;
  --text-muted: #9a9aae;
  --text-dim: #6e6e82;
  --accent: #6ee7ff;
  --accent-2: #ff7eb6;
  --accent-soft: rgba(110, 231, 255, 0.12);
  --warn: #ffd166;
  --warn-soft: rgba(255, 209, 102, 0.12);
  --ok: #51e898;
  --ok-soft: rgba(81, 232, 152, 0.12);
  --err: #ff7a8a;
  --err-soft: rgba(255, 122, 138, 0.12);
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.45);
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --font-sans: "Inter", "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", ui-monospace, "Cascadia Mono", "Menlo", monospace;
  --maxw: 1180px;
}

[data-theme="light"] {
  --bg: #f7f7fb;
  --bg-elev-1: #ffffff;
  --bg-elev-2: #ffffff;
  --bg-elev-3: #fafaff;
  --border: #e6e6ef;
  --border-strong: #d0d0dc;
  --text: #14141c;
  --text-muted: #4a4a5c;
  --text-dim: #76768a;
  --accent: #0c8aa6;
  --accent-2: #c8377b;
  --accent-soft: rgba(12, 138, 166, 0.10);
  --warn: #b07700;
  --warn-soft: rgba(176, 119, 0, 0.10);
  --ok: #18814f;
  --ok-soft: rgba(24, 129, 79, 0.10);
  --err: #b73140;
  --err-soft: rgba(183, 48, 64, 0.10);
  --shadow: 0 8px 24px rgba(15, 15, 30, 0.08);
  --shadow-lg: 0 24px 50px rgba(15, 15, 30, 0.12);
}

/* ----- reset & base ----- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(110, 231, 255, 0.07), transparent 60%),
    radial-gradient(900px 500px at -10% 30%, rgba(255, 126, 182, 0.06), transparent 60%),
    var(--bg);
  background-attachment: fixed;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
[data-theme="light"] body {
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(12, 138, 166, 0.06), transparent 60%),
    radial-gradient(900px 500px at -10% 30%, rgba(200, 55, 123, 0.05), transparent 60%),
    var(--bg);
}

h1, h2, h3, h4 { margin: 0; line-height: 1.2; letter-spacing: -0.01em; }
h1 { font-size: clamp(1.9rem, 3.2vw + 1rem, 3rem); letter-spacing: -0.025em; font-weight: 650; }
h2 { font-size: 1.35rem; font-weight: 600; }
h3 { font-size: 1rem; font-weight: 600; }
p { margin: 0; }
button { font: inherit; color: inherit; }
input, textarea, select, button { font-family: inherit; }
code { font-family: var(--font-mono); font-size: 0.92em; color: var(--accent); background: var(--accent-soft); padding: 0.05em 0.4em; border-radius: 4px; }
kbd { font-family: var(--font-mono); font-size: 0.78em; padding: 0.1em 0.45em; border: 1px solid var(--border-strong); border-bottom-width: 2px; border-radius: 4px; background: var(--bg-elev-2); color: var(--text-muted); }
::selection { background: var(--accent); color: var(--bg); }

.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; margin: -1px;
  padding: 0; overflow: hidden; clip: rect(0 0 0 0); border: 0;
}

.skip-link {
  position: absolute; top: -40px; left: 8px; padding: 8px 14px;
  background: var(--accent); color: var(--bg); text-decoration: none;
  border-radius: 6px; font-weight: 600; z-index: 100;
}
.skip-link:focus { top: 8px; }

/* ----- topbar ----- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px clamp(16px, 4vw, 36px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark { width: 26px; height: 26px; color: var(--accent); }
.brand-text { font-size: 0.95rem; letter-spacing: 0.01em; color: var(--text-muted); }
.brand-text strong { color: var(--text); letter-spacing: 0; }
.topbar-actions { display: flex; align-items: center; gap: 10px; }

/* ----- pills, chips, buttons ----- */
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.72rem; letter-spacing: 0.04em; text-transform: uppercase;
  padding: 5px 9px; border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
}
.pill--illustrative { color: var(--warn); background: var(--warn-soft); border-color: color-mix(in srgb, var(--warn) 40%, transparent); }
.pill--calibrated { color: var(--ok); background: var(--ok-soft); border-color: color-mix(in srgb, var(--ok) 40%, transparent); }
.pill--unknown { color: var(--err); background: var(--err-soft); border-color: color-mix(in srgb, var(--err) 40%, transparent); }
.pill--inline { padding: 2px 7px; font-size: 0.66rem; }

.primary-btn, .secondary-btn, .ghost-btn, .chip, .link-btn {
  -webkit-appearance: none; appearance: none;
  cursor: pointer; border-radius: 8px;
  font-weight: 600; font-size: 0.92rem;
  transition: background-color 160ms var(--ease), border-color 160ms var(--ease), color 160ms var(--ease), transform 160ms var(--ease);
  border: 1px solid transparent;
}
.primary-btn {
  padding: 10px 18px;
  background: linear-gradient(180deg, var(--accent), color-mix(in srgb, var(--accent) 80%, var(--accent-2)));
  color: var(--bg);
  border-color: color-mix(in srgb, var(--accent) 50%, transparent);
  box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 30%, transparent);
}
.primary-btn:hover { transform: translateY(-1px); filter: brightness(1.05); }
.primary-btn:active { transform: translateY(0); }

.secondary-btn {
  padding: 10px 16px;
  background: var(--bg-elev-2);
  color: var(--text);
  border-color: var(--border-strong);
}
.secondary-btn:hover { background: var(--bg-elev-3); border-color: var(--accent); }

.ghost-btn {
  padding: 8px 12px;
  background: transparent;
  color: var(--text-muted);
  border-color: var(--border);
}
.ghost-btn:hover { color: var(--text); border-color: var(--border-strong); background: var(--bg-elev-2); }
.ghost-btn.destructive:hover { color: var(--err); border-color: color-mix(in srgb, var(--err) 50%, transparent); background: var(--err-soft); }

.chip {
  padding: 6px 11px; font-size: 0.78rem;
  background: var(--bg-elev-2); color: var(--text-muted);
  border-color: var(--border);
}
.chip:hover { color: var(--text); border-color: var(--accent); }

.link-btn {
  background: none; border: 0; padding: 0;
  color: var(--accent); text-decoration: underline;
  text-underline-offset: 3px; text-decoration-thickness: 1px;
  font-size: inherit;
}
.link-btn:hover { text-decoration-thickness: 2px; }

.icon-btn {
  background: transparent; border: 1px solid transparent; color: var(--text-dim);
  width: 28px; height: 28px; border-radius: 6px;
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer; transition: all 140ms var(--ease);
}
.icon-btn:hover { color: var(--err); background: var(--err-soft); border-color: color-mix(in srgb, var(--err) 50%, transparent); }

/* keyboard focus */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 6px;
}
.primary-btn:focus-visible { outline-color: var(--text); outline-offset: 3px; }

/* ----- layout ----- */
.layout {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(24px, 4vw, 56px) clamp(16px, 4vw, 36px) 80px;
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

/* ----- hero ----- */
.hero { padding: clamp(8px, 2vw, 24px) 0 0; max-width: 880px; }
.eyebrow {
  text-transform: uppercase; letter-spacing: 0.18em; font-size: 0.74rem;
  color: var(--text-dim); font-weight: 600; margin-bottom: 14px;
}
.hero h1 .quote {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  font-style: italic;
}
.lede { color: var(--text-muted); font-size: clamp(1rem, 0.5vw + 0.9rem, 1.15rem); margin-top: 18px; max-width: 720px; }
.lede em { color: var(--text); font-style: normal; }
.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 24px; }

/* ----- card ----- */
.card {
  background: linear-gradient(180deg, var(--bg-elev-1), var(--bg-elev-2));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(18px, 2.2vw, 28px);
  box-shadow: var(--shadow);
}
.card-head {
  display: flex; justify-content: space-between; align-items: flex-start; gap: 16px;
  margin-bottom: 18px;
}
.card-head-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.card-sub { color: var(--text-muted); margin-top: 6px; font-size: 0.94rem; max-width: 60ch; }

.card-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(20px, 3vw, 28px);
}
@media (max-width: 900px) { .card-row { grid-template-columns: 1fr; } }

/* ----- lens ----- */
.lens-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 20px;
}
@media (max-width: 760px) { .lens-grid { grid-template-columns: 1fr; } }

.lens-input { display: flex; flex-direction: column; gap: 8px; }
.lens-input textarea {
  width: 100%;
  background: var(--bg-elev-3);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  resize: vertical;
  min-height: 160px;
  line-height: 1.55;
  font-size: 0.96rem;
  transition: border-color 160ms var(--ease), background-color 160ms var(--ease);
}
.lens-input textarea::placeholder { color: var(--text-dim); }
.lens-input textarea:hover { border-color: var(--border-strong); }
.lens-input textarea:focus { outline: none; border-color: var(--accent); background: var(--bg-elev-2); }
.lens-input-foot {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.82rem; color: var(--text-dim);
}
.hint { display: inline-flex; align-items: center; gap: 6px; }

.lens-output { display: flex; flex-direction: column; gap: 16px; }
.lens-highlights {
  background: var(--bg-elev-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  min-height: 80px;
  font-size: 0.95rem;
  line-height: 1.6;
  word-wrap: break-word;
  overflow-wrap: break-word;
}
.lens-highlights .placeholder { color: var(--text-dim); font-style: italic; margin: 0; }
.lens-highlights mark {
  background: var(--accent-soft);
  color: var(--text);
  padding: 1px 6px;
  border-radius: 5px;
  border-bottom: 1.5px solid var(--accent);
  font-weight: 500;
  position: relative;
}
.lens-highlights mark[data-cat="explicit"] { border-bottom-color: var(--accent-2); background: rgba(255, 126, 182, 0.12); }
.lens-highlights mark[data-cat="think"] { border-bottom-color: var(--warn); background: var(--warn-soft); }
.lens-highlights mark[data-cat="instant"] { border-bottom-color: var(--ok); background: var(--ok-soft); }
.lens-highlights mark sup {
  font-size: 0.7em; color: var(--text-muted); margin-left: 3px;
  font-variant-numeric: tabular-nums;
}

.lens-summary {
  display: grid;
  gap: 10px;
  padding: 14px 16px;
  background: var(--bg-elev-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.summary-row {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: 16px;
}
.summary-label { color: var(--text-muted); font-size: 0.88rem; }
.summary-value {
  font-family: var(--font-mono); font-size: 1.05rem; font-weight: 600;
  color: var(--text); font-variant-numeric: tabular-nums;
}
.summary-value.is-illustrative { color: var(--warn); }
.summary-value.is-calibrated { color: var(--ok); }
.summary-value.is-unknown { color: var(--err); }

.dist-wrap {
  margin: 0;
  background: var(--bg-elev-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.dist-chart {
  width: 100%; height: 200px; display: block;
  overflow: visible;
}
.dist-caption { font-size: 0.78rem; color: var(--text-dim); margin-top: 8px; text-align: center; }
.dist-curve {
  fill: url(#distGrad);
  stroke: var(--accent);
  stroke-width: 1.6;
  transition: d 600ms var(--ease-out);
}
.dist-tick { stroke: var(--border-strong); stroke-width: 1; }
.dist-tick-label { font-family: var(--font-mono); font-size: 9px; fill: var(--text-dim); }
.dist-marker { stroke-width: 1.4; }
.dist-marker-line-p10, .dist-marker-line-p90 { stroke: var(--text-dim); stroke-dasharray: 2 3; }
.dist-marker-line-p50 { stroke: var(--accent-2); }
.dist-marker-label { font-family: var(--font-mono); font-size: 10px; fill: var(--text-muted); font-variant-numeric: tabular-nums; }
.dist-marker-label-p50 { fill: var(--accent-2); font-weight: 600; }

/* ----- trainer form ----- */
.train-form {
  display: grid; gap: 14px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 18px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 200px;
  gap: 14px;
  align-items: end;
}
@media (max-width: 540px) { .form-row { grid-template-columns: 1fr; } }
.form-row--meta { align-items: center; }

.field { display: grid; gap: 6px; }
.field-label { font-size: 0.84rem; color: var(--text-muted); font-weight: 500; }
.field-hint { font-size: 0.78rem; color: var(--text-dim); }
.field input {
  width: 100%;
  background: var(--bg-elev-3);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 0.96rem;
  transition: border-color 160ms var(--ease);
}
.field input:hover { border-color: var(--border-strong); }
.field input:focus { outline: none; border-color: var(--accent); background: var(--bg-elev-2); }
.field input::placeholder { color: var(--text-dim); }
.field input:invalid:not(:placeholder-shown) { border-color: var(--err); }
.input-suffix { position: relative; }
.input-suffix input { padding-right: 64px; }
.input-suffix .suffix {
  position: absolute; right: 10px; top: 50%; transform: translateY(-50%);
  color: var(--text-dim); font-size: 0.84rem; pointer-events: none;
}

.category-preview {
  display: flex; align-items: center; gap: 10px;
  background: var(--bg-elev-3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 0.86rem;
  color: var(--text-muted);
  min-height: 38px;
  flex: 1;
}
.category-preview-label { color: var(--text-dim); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; }
.category-preview-value { color: var(--text); font-family: var(--font-mono); font-size: 0.92rem; }

/* ----- log list ----- */
.train-log-head {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 10px;
}
.train-log-head h3 { font-size: 0.92rem; color: var(--text-muted); font-weight: 500; }
.train-log-count { font-size: 0.78rem; color: var(--text-dim); font-variant-numeric: tabular-nums; }

.train-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; max-height: 280px; overflow-y: auto; }
.train-list::-webkit-scrollbar { width: 8px; }
.train-list::-webkit-scrollbar-track { background: transparent; }
.train-list::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 4px; }

.train-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: var(--bg-elev-3);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.88rem;
  animation: rowIn 280ms var(--ease-out);
}
@keyframes rowIn { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: none; } }

.train-row-phrase {
  font-family: var(--font-mono);
  color: var(--text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.train-row-meta { display: inline-flex; align-items: center; gap: 10px; color: var(--text-muted); font-size: 0.82rem; }
.train-row-cat {
  font-family: var(--font-mono); font-size: 0.74rem;
  padding: 2px 7px; border-radius: 4px;
  background: var(--bg-elev-2); color: var(--text-dim);
  border: 1px solid var(--border);
}
.train-row-actual {
  font-family: var(--font-mono); color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.empty-state {
  list-style: none;
  text-align: center;
  padding: 20px 16px;
  color: var(--text-dim);
  font-size: 0.9rem;
  font-style: italic;
  border: 1px dashed var(--border);
  border-radius: 8px;
}

/* ----- calibration list ----- */
.calib-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.calib-row {
  display: grid;
  gap: 8px;
  padding: 12px 14px;
  background: var(--bg-elev-3);
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: border-color 200ms var(--ease);
}
.calib-row:hover { border-color: var(--border-strong); }
.calib-row-head {
  display: flex; justify-content: space-between; align-items: center;
}
.calib-row-name { font-weight: 600; font-size: 0.95rem; }
.calib-row-numbers {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.calib-row-numbers span {
  display: flex; flex-direction: column; gap: 2px;
}
.calib-row-numbers label {
  font-size: 0.7rem; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 0.06em;
}
.calib-row-numbers b {
  font-family: var(--font-mono); font-weight: 600;
  color: var(--text); font-size: 0.92rem;
  font-variant-numeric: tabular-nums;
}
.calib-row-bar {
  position: relative;
  height: 6px; background: var(--bg-elev-1);
  border-radius: 3px; overflow: hidden;
}
.calib-row-bar-fill {
  position: absolute; top: 0; left: 0; bottom: 0;
  background: linear-gradient(90deg, var(--warn), var(--ok));
  width: 0%;
  transition: width 480ms var(--ease-out);
}
.calib-row[data-state="calibrated"] .calib-row-bar-fill { background: var(--ok); }
.calib-row[data-state="illustrative"] .calib-row-bar-fill { background: var(--warn); }
.calib-row[data-state="empty"] .calib-row-bar-fill { background: var(--text-dim); }

/* ----- methodology ----- */
.method-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}
.method-grid article {
  padding: 16px;
  background: var(--bg-elev-3);
  border: 1px solid var(--border);
  border-radius: 10px;
  display: grid; gap: 8px;
}
.method-grid h3 { color: var(--accent); font-size: 0.9rem; font-weight: 600; letter-spacing: 0.01em; }
.method-grid p { color: var(--text-muted); font-size: 0.9rem; }
.method-grid p em { color: var(--text); font-style: italic; }
.method-warn { border-color: color-mix(in srgb, var(--warn) 40%, var(--border)) !important; }
.method-warn h3 { color: var(--warn); }

/* ----- disclaimer ----- */
.disclaimer {
  padding: 20px 22px;
  border: 1px solid color-mix(in srgb, var(--warn) 35%, var(--border));
  background: var(--warn-soft);
  border-radius: var(--radius-lg);
}
.disclaimer h2 {
  font-size: 0.9rem; color: var(--warn);
  text-transform: uppercase; letter-spacing: 0.08em;
  margin-bottom: 8px;
}
.disclaimer p { color: var(--text); font-size: 0.94rem; }
.disclaimer strong { color: var(--warn); }

/* ----- footer ----- */
.footer {
  border-top: 1px solid var(--border);
  margin-top: 24px;
  padding: 24px clamp(16px, 4vw, 36px) 40px;
  display: flex; flex-wrap: wrap; gap: 16px;
  justify-content: space-between; align-items: center;
  font-size: 0.82rem;
  color: var(--text-dim);
  max-width: var(--maxw);
  margin-left: auto; margin-right: auto;
}
.footer-meta { display: inline-flex; align-items: center; gap: 8px; }
.dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--ok); display: inline-block;
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--ok) 70%, transparent);
  animation: dotPulse 2.4s ease-in-out infinite;
}
@keyframes dotPulse {
  0%, 100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--ok) 60%, transparent); }
  50% { box-shadow: 0 0 0 6px color-mix(in srgb, var(--ok) 0%, transparent); }
}

/* ----- transient flash ----- */
@keyframes flash { 0% { background-color: var(--accent-soft); } 100% { background-color: transparent; } }
.flash { animation: flash 700ms var(--ease-out); }

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