/* ---------------- Reset & base ---------------- */

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  /* Fluid base font size: scales smoothly between mobile and desktop
     instead of jumping at fixed breakpoints. 14px at <=380px viewports,
     16px at >=1200px, linearly interpolated in between. This is what
     fixes the "font size too big on mobile" problem from the old UI --
     nothing on this page uses a hardcoded px font-size; everything is
     either relative (em/rem) or its own clamp(). */
  font-size: clamp(14px, 3.2vw + 8px, 16px);
}

body {
  background: #0a0a0a;
  color: var(--text);
  font-family: 'JetBrains Mono', 'Courier New', Consolas, monospace;
  line-height: 1.6;
  padding: clamp(20px, 5vw, 48px) clamp(16px, 4vw, 24px);
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 760px;
  margin: 0 auto;
}

a { color: inherit; }

/* ---------------- System bar ---------------- */

.sys-bar {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-bottom: 1px solid #1f1f1f;
  padding-bottom: 16px;
  margin-bottom: clamp(24px, 5vw, 32px);
}

@media (min-width: 480px) {
  .sys-bar {
    flex-direction: row;
    justify-content: space-between;
    gap: 8px 24px;
  }
}

.col-right { text-align: left; }

@media (min-width: 480px) {
  .col-right { text-align: right; }
}

.sys-bar .label { color: var(--text-faint); }
.sys-bar div { margin-bottom: 2px; }

.status-ok { color: var(--green); }
.status-warn { color: #fbbf24; }
.status-error { color: #f87171; }

/* ---------------- ASCII logo ---------------- */

.pixel-title {
  font-family: 'Press Start 2P', monospace;
  font-size: clamp(1.1rem, 4vw, 2rem);
  color: var(--green);
  line-height: 1.6;
  margin-bottom: clamp(14px, 3vw, 24px);
  letter-spacing: 0.05em;
}

body.light .pixel-title {
  color: #15803d;
}

/* ---------------- Prompt / body text ---------------- */

.prompt-line {
  color: var(--green);
  margin-bottom: 4px;
  font-size: clamp(0.8rem, 2.2vw, 0.95rem);
}

.body-text {
  color: var(--text-dim);
  margin-bottom: clamp(20px, 4vw, 24px);
  font-size: clamp(0.8rem, 2.2vw, 0.95rem);
}

/* ---------------- Sections ---------------- */

.section {
  margin-bottom: clamp(28px, 5vw, 32px);
}

.section-label {
  color: var(--text-muted);
  font-size: 0.78rem;
  margin-bottom: 10px;
}

/* ---------------- Input ---------------- */

.input-box {
  width: 100%;
  background: var(--bg2);
  border: 1px solid var(--border2);
  color: var(--text);
  font-family: inherit;
  font-size: clamp(0.8rem, 2.2vw, 0.95rem);
  padding: 14px 16px;
  resize: vertical;
  min-height: 84px;
  outline: none;
  border-radius: 2px;
}

.input-box::placeholder { color: var(--text-faint); }
.input-box:focus { border-color: var(--green); }

.run-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
}

.run-btn {
  background: transparent;
  border: 1px solid #4ade80;
  color: var(--green);
  font-family: inherit;
  font-size: 0.85rem;
  padding: 9px 18px;
  cursor: pointer;
  border-radius: 2px;
  transition: background 0.15s ease;
  -webkit-tap-highlight-color: transparent;
}

.run-btn:hover { background: rgba(74, 222, 128, 0.08); }
.run-btn:active { background: rgba(74, 222, 128, 0.15); }
.run-btn:disabled {
  opacity: 0.5;
  cursor: default;
  border-color: var(--text-faint);
  color: var(--text-muted);
}

.hint { color: var(--text-faint); font-size: 0.78rem; }

.error-box {
  margin-top: 16px;
  border: 1px solid #7f1d1d;
  background: rgba(248, 113, 113, 0.06);
  color: #f87171;
  padding: 12px 16px;
  font-size: 0.85rem;
  border-radius: 2px;
}

/* ---------------- Result block ---------------- */

.result-block {
  border: 1px solid #1f1f1f;
  background: var(--bg2);
  margin-top: 20px;
  border-radius: 2px;
  overflow: hidden;
}

.verdict-banner {
  padding: 14px 16px;
  border-bottom: 1px solid #1a1a1a;
}

.verdict-banner.ok { background: rgba(74, 222, 128, 0.06); }
.verdict-banner.warn { background: rgba(251, 191, 36, 0.06); }

.verdict-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.dot.ok { background: #4ade80; }
.dot.warn { background: #fbbf24; }

.verdict-text {
  font-size: clamp(0.8rem, 2.2vw, 0.95rem);
  color: var(--green);
}

.verdict-text.warn { color: #fbbf24; }

.verdict-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  padding-left: 18px;
}

.gauge-row {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(16px, 4vw, 28px);
  align-items: center;
  padding: 20px;
}

/* ---------------- Gauge ---------------- */

.gauge-wrap {
  position: relative;
  width: clamp(100px, 22vw, 140px);
  height: clamp(100px, 22vw, 140px);
  flex-shrink: 0;
  margin: 0 auto;
}

.gauge-svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.gauge-track {
  fill: none;
  stroke: var(--border);
  stroke-width: 8;
}

.gauge-fill {
  fill: none;
  stroke: #4ade80;
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 327; /* 2 * pi * 52, computed circumference */
  stroke-dashoffset: 327;
  transition: stroke-dashoffset 0.6s cubic-bezier(0.4, 0, 0.2, 1), stroke 0.3s ease;
}

.gauge-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.gauge-value {
  font-size: clamp(1.1rem, 4vw, 1.5rem);
  color: var(--text);
  font-weight: 700;
}

.gauge-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ---------------- Evidence rows ---------------- */

.evidence-rows {
  flex: 1;
  min-width: 200px;
}

.result-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 0;
  border-bottom: 1px solid #1a1a1a;
  font-size: 0.85rem;
}

.result-row:last-child { border-bottom: none; }

.result-row .k { color: var(--text-muted); flex-shrink: 0; }
.result-row .v { color: var(--text); text-align: right; word-break: break-word; }
.result-row .v.pos { color: var(--green); }
.result-row .v.neg { color: #f87171; }

/* ---------------- Metrics grid ---------------- */

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: #1f1f1f;
  border: 1px solid #1f1f1f;
  margin-top: 12px;
  border-radius: 2px;
  overflow: hidden;
}

@media (min-width: 520px) {
  .metrics-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.metric-cell {
  background: var(--bg2);
  padding: 16px;
}

.metric-val {
  font-size: clamp(1.1rem, 4vw, 1.4rem);
  color: var(--text);
  margin-bottom: 4px;
  font-weight: 700;
}

.metric-label {
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* ---------------- PR chart ---------------- */

.chart-card {
  border: 1px solid #1f1f1f;
  background: var(--bg2);
  margin-top: 16px;
  padding: 18px;
  border-radius: 2px;
}

.chart-title {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.pr-svg {
  width: 100%;
  max-height: 230px;
  height: auto;
  display: block;
}

.chart-caption {
  font-size: 0.72rem;
  color: var(--text-faint);
  margin-top: 10px;
}

/* ---------------- Footer ---------------- */

.footer-line {
  margin-top: clamp(36px, 6vw, 48px);
  padding-top: 16px;
  border-top: 1px solid #1f1f1f;
  color: var(--text-faint);
  font-size: 0.78rem;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: space-between;
}

.footer-line a {
  color: var(--text-faint);
  text-decoration: none;
}

.footer-line a:hover { color: var(--green); }

.footer-icons {
  display: flex;
  gap: 14px;
  align-items: center;
}

.footer-icons a {
  display: flex;
  color: var(--text-faint);
  transition: color 0.15s ease;
}

.footer-icons a:hover { color: var(--green); }

/* ---------------- Tabs ---------------- */

.tab-nav {
  display: flex;
  gap: 4px;
  margin-bottom: clamp(20px, 4vw, 28px);
  border-bottom: 1px solid #1f1f1f;
}

.tab-btn {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.8rem;
  padding: 10px 4px;
  margin-right: clamp(10px, 4vw, 20px);
  cursor: pointer;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
  transition: color 0.15s ease;
}

.tab-btn::before {
  content: "> ";
  opacity: 0;
  transition: opacity 0.15s ease;
}

.tab-btn:hover { color: var(--text-dim); }

.tab-btn.active {
  color: var(--green);
  border-bottom-color: var(--green);
}

.tab-btn.active::before { opacity: 1; }

.tab-panel[hidden] { display: none; }

/* ---------------- Architecture diagram ---------------- */

.arch-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  margin-top: 20px;
}

.arch-row {
  display: flex;
  gap: 12px;
  width: 100%;
  justify-content: center;
  flex-wrap: wrap;
}

.arch-connector {
  width: 1px;
  height: 24px;
  background: var(--border2);
}

.arch-node {
  border: 1px solid var(--border2);
  background: var(--bg2);
  padding: 14px 18px;
  border-radius: 2px;
  text-align: center;
  min-width: 140px;
  flex: 1 1 160px;
  max-width: 100%;
}

.arch-node-title {
  color: var(--text);
  font-size: 0.85rem;
  margin-bottom: 4px;
}

.arch-node-sub {
  color: var(--text-muted);
  font-size: 0.7rem;
  line-height: 1.4;
}

.arch-node-primary {
  border-color: var(--green);
  background: rgba(74, 222, 128, 0.04);
}

.arch-node-input,
.arch-node-output {
  border-color: var(--text-faint);
  max-width: 100%;
}

.arch-node-meta {
  border-color: #fbbf24;
  background: rgba(251, 191, 36, 0.04);
  max-width: 100%;
}

.arch-node-wide {
  max-width: 100%;
  flex: 1 1 100%;
}

.metrics-grid-wide {
  max-width: 100%;
}

/* ---------------- Feedback form ---------------- */

.input-box-single {
  min-height: auto;
  height: 44px;
  resize: none;
}

.success-box {
  margin-top: 16px;
  border: 1px solid #166534;
  background: rgba(74, 222, 128, 0.06);
  padding: 14px 16px;
  border-radius: 2px;
}

.success-box .verdict-text {
  font-size: 0.85rem;
}

/* ---------------- Accessibility ---------------- */

:focus-visible {
  outline: 2px solid #4ade80;
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .gauge-fill {
    transition: none;
  }
}

/* ---------------- Theme toggle ---------------- */

:root {
  --bg: #0a0a0a;
  --bg2: #0f0f0f;
  --border: #1f1f1f;
  --border2: #2a2a2a;
  --text: #d4d4d4;
  --text-dim: #a3a3a3;
  --text-muted: #6b6b6b;
  --text-faint: #4a4a4a;
  --green: #4ade80;
  --amber: #fbbf24;
  --red: #f87171;
}

body.light {
  --bg: #f0f0eb;
  --bg2: #e4e4de;
  --border: #c8c8c2;
  --border2: #b0b0aa;
  --text: #111111;
  --text-dim: #2a2a2a;
  --text-muted: #444444;
  --text-faint: #777777;
  --green: #15803d;
  --amber: #b45309;
  --red: #b91c1c;
}

body {
  background: var(--bg);
  color: var(--text);
}

.sys-bar { border-color: var(--border); color: var(--text-muted); }
.sys-bar .label { color: var(--text-faint); }
.status-ok { color: var(--green); }
.prompt-line { color: var(--green); }
.body-text { color: var(--text-dim); }
.section-label { color: var(--text-muted); }
.tab-nav { border-color: var(--border); }
.tab-btn { color: var(--text-muted); }
.tab-btn.active { color: var(--green); border-color: var(--green); }
.input-box { background: var(--bg2); border-color: var(--border2); color: var(--text); }
.input-box:focus { border-color: var(--green); }
.input-box::placeholder { color: var(--text-faint); }
.run-btn { border-color: var(--green); color: var(--green); }
.run-btn:hover { background: rgba(74,222,128,0.08); }
.hint { color: var(--text-faint); }
.result-block { border-color: var(--border); background: var(--bg2); }
.verdict-banner.ok { background: rgba(74,222,128,0.06); }
.verdict-banner.warn { background: rgba(251,191,36,0.06); }
.verdict-text { color: var(--green); }
.verdict-text.warn { color: var(--amber); }
.verdict-sub { color: var(--text-muted); }
.gauge-track { stroke: var(--border); }
.result-row { border-color: var(--border); }
.result-row .k { color: var(--text-muted); }
.result-row .v { color: var(--text); }
.result-row .v.pos { color: var(--green); }
.result-row .v.neg { color: var(--red); }
.metrics-grid { background: var(--border); border-color: var(--border); }
.metric-cell { background: var(--bg2); }
.metric-val { color: var(--text); }
.metric-label { color: var(--text-muted); }
.chart-card { border-color: var(--border); background: var(--bg2); }
.chart-title { color: var(--text-dim); }
.chart-caption { color: var(--text-faint); }
.footer-line { border-color: var(--border); color: var(--text-faint); }
.footer-line a { color: var(--text-faint); }
.footer-icons a { color: var(--text-faint); }
.error-box { color: var(--red); }
.success-box { background: rgba(74,222,128,0.06); }

.theme-toggle {
  background: transparent;
  border: 1px solid var(--border2);
  color: var(--text-muted);
  font-size: 0.85rem;
  width: 26px;
  height: 26px;
  cursor: pointer;
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: color 0.15s, border-color 0.15s;
}

.theme-toggle:hover { color: var(--green); border-color: var(--green); }

/* ---------------- Example chips ---------------- */

.chips-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  margin-top: 10px;
}

.chips-label {
  font-size: 0.72rem;
  color: var(--text-faint);
  flex-shrink: 0;
}

.chip {
  background: transparent;
  border: 1px solid var(--border2);
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.72rem;
  padding: 4px 10px;
  cursor: pointer;
  border-radius: 2px;
  transition: color 0.15s, border-color 0.15s;
  -webkit-tap-highlight-color: transparent;
  white-space: nowrap;
}

.chip:hover {
  color: var(--green);
  border-color: var(--green);
}

/* ---------------- Confidence bars ---------------- */

.v-group {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  min-width: 0;
}

.conf-bar-wrap {
  width: 80px;
  height: 2px;
  background: var(--border);
  border-radius: 1px;
  overflow: hidden;
}

.conf-bar {
  height: 100%;
  width: 0%;
  background: var(--green);
  border-radius: 1px;
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.conf-bar-warn { background: var(--amber); }

/* ---------------- History panel ---------------- */

.history-panel {
  margin-top: 24px;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  margin-top: 10px;
}

.history-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  background: var(--bg2);
  border: 1px solid var(--border);
  cursor: pointer;
  font-size: 0.78rem;
  transition: border-color 0.15s;
}

.history-item:hover { border-color: var(--border2); }

.history-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.history-dot.ok { background: var(--green); }
.history-dot.warn { background: var(--amber); }

.history-text {
  flex: 1;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.history-prob {
  color: var(--text-faint);
  flex-shrink: 0;
}