:root {
  color-scheme: dark;
  --navy: #0D1B2A;
  --cream: #F8F5F0;
  --text-on-light: #1A1A1A;
  --ink: #EAEAEA;
  --muted: rgba(234, 234, 234, 0.74);
  --paper: var(--navy);
  --panel: var(--navy);
  --surface: rgba(234, 234, 234, 0.045);
  --line: rgba(234, 234, 234, 0.22);
  --accent: #00B4D8;
  --accent-hover: var(--cream);
  --accent-soft: rgba(0, 180, 216, 0.12);
  --success: #10B981;
  --success-soft: rgba(16, 185, 129, 0.12);
  --danger: #FF93A6;
  --danger-soft: rgba(255, 147, 166, 0.08);
  --shadow: 0 14px 38px rgba(0, 0, 0, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  line-height: 1.5;
}

a {
  color: var(--accent);
  text-underline-offset: 3px;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.hero {
  min-height: 520px;
  padding: 26px clamp(22px, 6vw, 88px) 120px;
  overflow: hidden;
  position: relative;
}

.hero::after {
  border: 1px solid rgba(0, 180, 216, 0.28);
  border-radius: 50%;
  content: "";
  height: 410px;
  position: absolute;
  right: -115px;
  top: 65px;
  width: 410px;
}

.hero::before {
  border: 1px solid rgba(0, 180, 216, 0.16);
  border-radius: 50%;
  content: "";
  height: 280px;
  position: absolute;
  right: -20px;
  top: 130px;
  width: 280px;
}

.nav {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin: 0 auto;
  max-width: 1180px;
  position: relative;
  z-index: 1;
}

.brand {
  align-items: center;
  color: var(--ink);
  display: inline-flex;
  font-size: 0.95rem;
  font-weight: 760;
  gap: 10px;
  text-decoration: none;
}

.brand-mark {
  align-items: center;
  background: var(--accent);
  border-radius: 9px;
  color: var(--navy);
  display: inline-flex;
  height: 34px;
  justify-content: center;
  width: 34px;
}

.status-pill {
  align-items: center;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  display: inline-flex;
  font-size: 0.8rem;
  font-weight: 650;
  gap: 8px;
  padding: 8px 13px;
}

.status-dot {
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(0, 180, 216, 0.14);
  height: 7px;
  width: 7px;
}

.hero-copy {
  margin: 92px auto 0;
  max-width: 1180px;
  position: relative;
  z-index: 1;
}

.eyebrow,
.section-number {
  color: var(--accent);
  font-size: 0.73rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  margin: 0 0 14px;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  font-family: inherit;
  font-size: clamp(3.5rem, 8vw, 7rem);
  font-weight: 500;
  letter-spacing: -0.055em;
  line-height: 0.88;
  margin-bottom: 30px;
  max-width: 850px;
}

.hero-description {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 580px;
}

.formula {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 34px;
}

.formula span {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 720;
  padding: 8px 13px;
}

.formula b {
  color: var(--muted);
  font-weight: 500;
}

.page-shell {
  margin: -66px auto 0;
  max-width: 1240px;
  padding: 0 30px 80px;
  position: relative;
  z-index: 2;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.runner-panel {
  padding: clamp(24px, 4vw, 48px);
}

.section-heading {
  align-items: flex-end;
  display: flex;
  gap: 38px;
  justify-content: space-between;
}

.section-heading.compact {
  align-items: flex-start;
}

.section-heading h2,
.lesson-panel h2 {
  font-family: inherit;
  font-size: clamp(2rem, 3vw, 2.8rem);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1;
  margin-bottom: 13px;
}

.section-heading p:not(.section-number) {
  color: var(--muted);
  margin-bottom: 0;
}

.run-controls {
  align-items: flex-end;
  display: flex;
  flex: 0 0 auto;
  gap: 20px;
}

.threshold-control {
  color: var(--muted);
  display: grid;
  font-size: 0.78rem;
  font-weight: 680;
  gap: 7px;
}

.range-row {
  align-items: center;
  display: flex;
  gap: 10px;
}

input[type="range"] {
  accent-color: var(--accent);
  width: 130px;
}

output {
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  min-width: 34px;
}

.primary-button,
.secondary-button {
  align-items: center;
  border: 0;
  border-radius: 12px;
  display: inline-flex;
  font-weight: 750;
  justify-content: center;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    background 160ms ease;
}

.primary-button {
  background: var(--accent);
  box-shadow: 0 8px 18px rgba(0, 180, 216, 0.2);
  color: var(--navy);
  gap: 24px;
  min-width: 175px;
  padding: 14px 17px;
}

.secondary-button {
  background: var(--accent);
  color: var(--navy);
  min-height: 48px;
  padding: 12px 20px;
}

.primary-button:hover,
.secondary-button:hover {
  box-shadow: 0 10px 24px rgba(0, 180, 216, 0.25);
  transform: translateY(-1px);
}

.primary-button:disabled,
.secondary-button:disabled {
  cursor: wait;
  opacity: 0.65;
  transform: none;
}

.run-status {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.86rem;
  margin: 34px 0 0;
  padding-top: 20px;
}

.metric-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 28px;
}

.metric-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  min-height: 160px;
  padding: 22px;
}

.metric-card.score-card {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--navy);
}

.metric-card p {
  color: inherit;
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  margin-bottom: auto;
  text-transform: uppercase;
}

.metric-card strong {
  font-family: inherit;
  font-size: 2.7rem;
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1;
  margin: 18px 0 8px;
}

.metric-card span {
  color: inherit;
  font-size: 0.78rem;
}

.results-toolbar {
  align-items: flex-end;
  display: flex;
  justify-content: space-between;
  margin: 42px 0 18px;
}

.results-toolbar h3,
.slice-section h3 {
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.results-toolbar p {
  color: var(--muted);
  font-size: 0.82rem;
  margin-bottom: 0;
}

.filter-group {
  background: var(--surface);
  border-radius: 10px;
  display: flex;
  padding: 3px;
}

.filter-button {
  background: transparent;
  border: 0;
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 720;
  padding: 8px 12px;
}

.filter-button.active {
  background: var(--panel);
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.1);
  color: var(--ink);
}

.table-wrap {
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow-x: auto;
}

table {
  border-collapse: collapse;
  font-size: 0.82rem;
  min-width: 820px;
  width: 100%;
}

th {
  background: var(--accent-soft);
  color: var(--muted);
  font-size: 0.69rem;
  letter-spacing: 0.08em;
  padding: 13px 15px;
  text-align: left;
  text-transform: uppercase;
}

td {
  border-top: 1px solid var(--line);
  padding: 15px;
  vertical-align: top;
}

tbody tr {
  transition: background 120ms ease;
}

tbody tr:hover {
  background: var(--accent-soft);
}

tbody tr.failed-row {
  background: var(--danger-soft);
}

.result-badge,
.tag,
.gate-badge {
  border-radius: 999px;
  display: inline-flex;
  font-size: 0.68rem;
  font-weight: 780;
  padding: 5px 8px;
}

.result-badge.pass,
.gate-badge.pass {
  background: var(--success-soft);
  color: var(--success);
}

.result-badge.fail,
.gate-badge.fail {
  background: var(--danger-soft);
  color: var(--danger);
}

.ticket-cell {
  max-width: 370px;
  min-width: 260px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.tag {
  background: var(--accent-soft);
  color: var(--muted);
  font-weight: 650;
}

.slice-section {
  align-items: flex-start;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 24px;
  grid-template-columns: 190px 1fr;
  margin-top: 38px;
  padding-top: 30px;
}

.slice-section .section-number {
  margin-bottom: 7px;
}

.slice-grid {
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.slice-item {
  background: var(--surface);
  border-radius: 10px;
  padding: 11px 13px;
}

.slice-item div {
  align-items: center;
  display: flex;
  font-size: 0.74rem;
  justify-content: space-between;
  margin-bottom: 7px;
}

.slice-item strong {
  font-size: 0.76rem;
}

.slice-bar {
  background: var(--line);
  border-radius: 999px;
  display: block;
  height: 5px;
  overflow: hidden;
}

.slice-bar span {
  background: var(--accent);
  border-radius: inherit;
  display: block;
  height: 100%;
}

.lower-grid {
  display: grid;
  gap: 22px;
  grid-template-columns: minmax(0, 1.5fr) minmax(300px, 0.8fr);
  margin-top: 22px;
}

.try-panel,
.lesson-panel {
  padding: clamp(24px, 4vw, 42px);
}

form {
  border-top: 1px solid var(--line);
  margin-top: 30px;
  padding-top: 24px;
}

form > label,
.form-row label {
  color: var(--muted);
  display: grid;
  font-size: 0.76rem;
  font-weight: 720;
  gap: 8px;
}

textarea,
select {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 11px;
  color: var(--ink);
}

textarea {
  line-height: 1.55;
  margin-top: 8px;
  padding: 14px;
  resize: vertical;
  width: 100%;
}

textarea::placeholder {
  color: var(--muted);
}

select {
  min-width: 165px;
  padding: 12px;
}

.form-row {
  align-items: flex-end;
  display: flex;
  justify-content: space-between;
  margin-top: 18px;
}

.single-result {
  border: 1px solid var(--line);
  border-radius: 13px;
  margin-top: 22px;
  padding: 16px;
}

.single-result.pass {
  background: var(--success-soft);
  border-color: var(--success);
}

.single-result.fail {
  background: var(--danger-soft);
  border-color: var(--danger);
}

.single-result strong {
  display: block;
  margin-bottom: 4px;
}

.single-result p {
  font-size: 0.85rem;
  margin-bottom: 0;
}

.lesson-panel {
  background: var(--cream);
  color: var(--text-on-light);
}

.lesson-panel .section-number {
  color: var(--accent);
}

.lesson-panel h2 {
  max-width: 330px;
}

.lesson-list {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
}

.lesson-list li {
  align-items: flex-start;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  display: flex;
  gap: 14px;
  padding: 17px 0;
}

.lesson-list li > span {
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 50%;
  display: inline-flex;
  flex: 0 0 auto;
  font-size: 0.7rem;
  height: 28px;
  justify-content: center;
  width: 28px;
}

.lesson-list strong {
  font-size: 0.87rem;
}

.lesson-list p {
  color: rgba(255, 255, 255, 0.58);
  font-size: 0.78rem;
  margin: 4px 0 0;
}

footer {
  color: var(--muted);
  font-size: 0.75rem;
  padding: 0 30px 34px;
  text-align: center;
}

footer p {
  margin: 0;
}

@media (max-width: 860px) {
  .hero {
    min-height: 490px;
  }

  .section-heading,
  .run-controls {
    align-items: stretch;
    flex-direction: column;
  }

  .run-controls {
    margin-top: 24px;
  }

  .primary-button {
    width: 100%;
  }

  .lower-grid {
    grid-template-columns: 1fr;
  }

  .slice-section {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .hero {
    padding-inline: 20px;
  }

  .hero::after,
  .hero::before {
    display: none;
  }

  .status-pill {
    font-size: 0;
    padding: 10px;
  }

  .hero-copy {
    margin-top: 72px;
  }

  h1 {
    font-size: 3.55rem;
  }

  .page-shell {
    padding-inline: 12px;
  }

  .metric-grid,
  .slice-grid {
    grid-template-columns: 1fr;
  }

  .metric-card {
    min-height: 135px;
  }

  .results-toolbar,
  .form-row {
    align-items: stretch;
    flex-direction: column;
    gap: 16px;
  }

  .filter-group {
    width: fit-content;
  }

  .secondary-button,
  select {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}
/* Shared layout for the evaluation workshop. */
.hero { min-height: 390px; padding-bottom: 100px; }
.hero-copy { margin-top: 52px; }
h1 { font-size: clamp(3rem, 6vw, 5.5rem); line-height: .98; }
.hero-description { max-width: 650px; }
.hero::before,.hero::after { pointer-events: none; }
.control-grid { display:grid; grid-template-columns: 1.2fr 1.15fr 1fr 1fr; gap:18px; margin:30px 0 16px; }
label { display:grid; gap:8px; font-size:.78rem; font-weight:700; color:var(--muted); }
select { width:100%; min-width:0; }
input[type=text] { width:100%; border:1px solid var(--line); background:var(--panel); border-radius:10px; padding:12px; color:var(--ink); }
.threshold-control { align-content:start; }
.range-row { min-height:47px; }
.action-row { display:flex; align-items:end; flex-wrap:wrap; gap:12px; margin:16px 0; }
.outline-button,.text-button { font:inherit; font-size:.85rem; font-weight:700; padding:12px 16px; border-radius:10px; }
.outline-button { border:1px solid var(--line); color:var(--ink); background:var(--panel); }
.outline-button:hover { background:var(--accent-soft); border-color:var(--accent); }
.text-button { border:0; background:transparent; color:var(--accent); }
.text-button:hover { text-decoration:underline; }
button:disabled { opacity:.5; cursor:default; }
.grow { flex:1; min-width:180px; }
.muted { color:var(--muted); font-size:.86rem; }
.small { font-size:.76rem; margin:18px 0 0; }
.error,.danger { color:var(--danger); }
.good { color:var(--ink); }
.tune-panel { margin-top:24px; padding:clamp(24px,4vw,48px); }
.tuning-grid { display:grid; grid-template-columns:1.5fr 1fr; gap:36px; margin:20px 0; }
fieldset { border:0; padding:0; margin:0; min-width:0; }
fieldset:disabled { opacity:.6; }
.case-editor>label { margin-top:18px; }
.case-editor textarea { margin-bottom:8px; }
#case-expected { font-family:ui-monospace,SFMono-Regular,monospace; font-size:.86rem; }
.grader-editor { padding:24px; border-radius:16px; background:var(--surface); align-self:start; margin-top:16px; }
.grader-editor p { font-size:.87rem; }
.check-control { display:flex; align-items:start; gap:12px; color:var(--ink); }
.check-control input { accent-color:var(--accent); width:18px; height:18px; flex:none; }
.check-control small { display:block; font-weight:400; color:var(--muted); margin-top:8px; }
.notice { background:var(--accent-soft); border-left:3px solid var(--accent); padding:15px; margin-top:22px; font-size:.84rem; }
.save-bar { border-top:1px solid var(--line); padding-top:22px; display:flex; flex-wrap:wrap; align-items:center; gap:12px; }
.file-label { display:inline-flex; cursor:pointer; position:relative; overflow:hidden; }
.file-label input { position:absolute; inset:0; opacity:0; cursor:pointer; width:100%; }
.file-label:focus-within { outline:3px solid var(--accent); }
.file-label:has(input:disabled) { opacity:.5; cursor:default; }
.ticket-cell strong { font-size:.73rem; }
.table-wrap { max-height:560px; overflow:auto; }
.table-wrap th { position:sticky; top:0; z-index:1; }
.table-wrap:focus-visible { outline:3px solid var(--accent); outline-offset:3px; }
.ticket-cell p { margin:7px 0 10px; }
.expected-cell { white-space:pre-wrap; font-family:ui-monospace,monospace; font-size:.75rem; max-width:190px; overflow-wrap:anywhere; }
.output-cell { min-width:180px; max-width:260px; }
pre { white-space:pre-wrap; overflow-wrap:anywhere; font-size:.75rem; font-family:ui-monospace,monospace; }
.result-badge { margin:0 4px 4px 0; }
summary { cursor:pointer; color:var(--accent); font-size:.78rem; margin-top:8px; }
details p { font-size:.74rem; margin:8px 0; }
.slice-item meter { appearance:none; width:100%; height:6px; border:0; border-radius:999px; background:var(--line); }
.slice-item meter::-webkit-meter-bar { height:6px; border:0; border-radius:999px; background:var(--line); box-shadow:none; }
.slice-item meter::-webkit-meter-optimum-value,
.slice-item meter::-webkit-meter-suboptimum-value,
.slice-item meter::-webkit-meter-even-less-good-value { background:var(--accent); border-radius:999px; }
.slice-item meter::-moz-meter-bar { background:var(--accent); border-radius:999px; }
.slice-item div { display:block; overflow-wrap:anywhere; }
footer { padding:32px 0 0; }
footer p+p { margin-top:7px; }
[hidden] { display:none!important; }
@media(max-width:1000px) { .control-grid { grid-template-columns:repeat(2,minmax(0,1fr)); } }
@media(max-width:700px) { .tuning-grid { grid-template-columns:1fr; gap:8px; } .hero { min-height:390px; } .hero-copy { margin-top:48px; } .control-grid { grid-template-columns:1fr; } .action-row .primary-button { width:100%; } .tune-panel .section-heading { gap:16px; } .status-pill { font-size:.65rem; max-width:135px; } .brand { font-size:.8rem; } .metric-card strong { font-size:2.3rem; } .save-bar>* { flex:1 1 45%; justify-content:center; text-align:center; } }

/* Navy canvas, cyan actions, and restrained semantic result colors. */
.hero { background:var(--panel); border-top:6px solid var(--accent); }
h1 span { color:var(--accent); }
.primary-button:hover,.secondary-button:hover { background:var(--accent-hover); }
.metric-card p,.metric-card span { color:var(--muted); }
.metric-card.score-card p,.metric-card.score-card span { color:var(--navy); }
.tag { color:var(--accent-hover); }
.status-pill { color:var(--ink); border-color:var(--line); }
select:hover,textarea:hover,input[type=text]:hover { border-color:var(--accent); }
.grader-editor { border:1px solid var(--line); }
.experiment-options,.measurement-panel { border-top:1px solid var(--line); padding:12px 0; margin:16px 0; }
.experiment-options>summary,.measurement-panel>summary { font-size:.88rem; font-weight:700; }
.experiment-options .control-grid { margin:20px 0; }
.measurement-panel p { font-size:.85rem; overflow-wrap:anywhere; }
.history-panel select { max-width:100%; }
.history-panel { padding:clamp(22px,3.4vw,48px); margin-top:24px; }
input[type=number],input:not([type]) { font:inherit; color:var(--ink); border:1px solid var(--line); border-radius:8px; padding:12px; width:100%; background:var(--panel); }
#case-input { font-family:ui-monospace,SFMono-Regular,monospace; font-size:.86rem; }
.ticket-cell details { max-width:300px; }
caption { text-align:left; margin:12px 0; font-weight:700; }
.case-study-hero { background:var(--panel); border-top:6px solid var(--accent); padding:26px clamp(22px,6vw,88px) 48px; }
.case-study-page { margin-top:28px; }
.incident-card { padding:clamp(22px,3.4vw,48px); margin-bottom:24px; scroll-margin-top:20px; }
.incident-card h3 { font-size:1.05rem; margin-top:28px; }
.incident-card p,.incident-card li { max-width:80ch; }
.incident-card li { margin:10px 0; }
.incident-card a { overflow-wrap:anywhere; }
.incident-card .outline-button { display:inline-block; margin-top:20px; text-decoration:none; }
.incident-card .notice { max-width:none; }

/* Keep emerald reserved for compact PASS badges, not controls or charts. */
.result-badge.improved { background:var(--accent-soft); color:var(--accent); }
h1 { font-weight:700; line-height:1.04; color:var(--cream); }
.section-heading h2,.lesson-panel h2,.metric-card strong { font-weight:650; }
.single-result.pass { background:var(--surface); border-color:var(--line); }
.lesson-panel .section-number { color:var(--text-on-light); }
.lesson-list li,.lesson-list li>span { border-color:rgba(13,27,42,.22); }
.lesson-list p { color:rgba(26,26,26,.74); }