/* Design tokens and component classes transcribed from
   T2AV_guideline_final_updated.html, reused across the Guideline, Training,
   and Evaluation pages so the whole app reads as one consistent system. */

:root {
  --paper: #f4f4f1;
  --surface: #ffffff;
  --ink: #16202c;
  --muted: #5b6672;
  --accent: #35507a;
  --pass: #1f7a4d;
  --fail: #c4362e;
  --line: #e4e4de;
  --pass-bg: #e7f2ec;
  --fail-bg: #fbe9e7;
  --chip: #16202c;
  --display: "Space Grotesk", sans-serif;
  --body: "Inter", sans-serif;
  --mono: "IBM Plex Mono", monospace;
}

.t2av-shell {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  min-height: 100vh;
}

.t2av-shell * {
  box-sizing: border-box;
}

.t2av-shell h1,
.t2av-shell h2,
.t2av-shell h3 {
  font-family: var(--display);
}

/* ---- guideline page layout ---- */
.g-wrap {
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  gap: 0;
  max-width: 1180px;
  margin: 0 auto;
}

.g-aside {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  padding: 38px 24px 38px 32px;
  border-right: 1px solid var(--line);
  overflow-y: auto;
}

.g-brand {
  font-family: var(--display);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 4px;
}

.g-brand span {
  color: var(--accent);
}

.g-sub {
  font-size: 12.5px;
  color: var(--muted);
  margin-bottom: 26px;
}

.g-aside nav a {
  display: block;
  font-size: 13.5px;
  color: var(--muted);
  text-decoration: none;
  padding: 5px 0 5px 12px;
  border-left: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.g-aside nav a .n {
  font-family: var(--mono);
  font-size: 11px;
  color: #aeb3b8;
  margin-right: 8px;
}

.g-aside nav a:hover {
  color: var(--ink);
}

.g-aside nav a.active {
  color: var(--ink);
  border-left-color: var(--accent);
  font-weight: 600;
}

.g-aside nav a.active .n {
  color: var(--accent);
}

.g-main {
  padding: 56px 56px 120px;
}

.g-top {
  margin-bottom: 52px;
}

.eyebrow-g {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.g-main h1 {
  font-weight: 700;
  font-size: 44px;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 0 0 16px;
}

.g-lede {
  font-size: 17px;
  color: var(--muted);
  max-width: 60ch;
  margin: 0;
}

.g-meta {
  margin-top: 22px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.tag-chip {
  font-family: var(--mono);
  font-size: 12px;
  padding: 5px 11px;
  border: 1px solid var(--line);
  border-radius: 100px;
  color: var(--ink);
  background: var(--surface);
}

.g-section {
  scroll-margin-top: 24px;
  padding: 34px 0;
  border-top: 1px solid var(--line);
}

.g-section:first-of-type {
  border-top: none;
  padding-top: 8px;
}

.g-section h2 {
  font-weight: 600;
  font-size: 26px;
  letter-spacing: -0.02em;
  margin: 0 0 6px;
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.g-section h2 .num {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  flex: none;
}

.g-section h3 {
  font-weight: 600;
  font-size: 17px;
  margin: 26px 0 8px;
}

.g-section h4 {
  font-family: var(--display);
  font-weight: 600;
  font-size: 14.5px;
  margin: 20px 0 6px;
}

.g-section p {
  margin: 0 0 14px;
}

.muted {
  color: var(--muted);
}

.g-section ul {
  margin: 0 0 14px;
  padding-left: 22px;
}

.g-section li {
  margin-bottom: 6px;
}

.axis {
  font-family: var(--mono);
  font-weight: 600;
  display: inline-block;
  font-size: 12px;
  background: var(--chip);
  color: #fff;
  padding: 2px 8px;
  border-radius: 5px;
  letter-spacing: 0.02em;
}

.flow {
  font-family: var(--mono);
  font-size: 13px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 16px;
  display: inline-block;
  margin: 2px 0 16px;
}

.flow b {
  color: var(--accent);
}

.pass,
.fail {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 12.5px;
  padding: 1px 7px;
  border-radius: 5px;
  white-space: nowrap;
}

.pass {
  color: var(--pass);
  background: var(--pass-bg);
}

.fail {
  color: var(--fail);
  background: var(--fail-bg);
}

.g-section table,
.rtable {
  width: 100%;
  border-collapse: collapse;
  margin: 8px 0 18px;
  font-size: 14.5px;
}

.g-section th,
.g-section td,
.rtable th,
.rtable td {
  text-align: left;
  padding: 11px 14px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.g-section thead th,
.rtable thead th {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1.5px solid var(--ink);
}

.g-section tbody tr:last-child td,
.rtable tbody tr:last-child td {
  border-bottom: none;
}

.callout {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  padding: 14px 18px;
  margin: 16px 0;
  font-size: 14.5px;
}

.callout .k {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 4px;
}

/* ---- worked example (also used on the Training page) ---- */
.example {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 26px;
  margin-top: 12px;
}

.example .prompt {
  font-size: 14.5px;
  background: var(--paper);
  border-radius: 8px;
  padding: 15px 18px;
  margin-bottom: 20px;
  line-height: 1.6;
}

.example .prompt .lab {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 6px;
}

.example .tldr {
  font-style: italic;
  color: var(--muted);
  margin: 14px 0 18px;
}

.events-grid {
  display: grid;
  gap: 9px;
  margin: 0 0 10px;
}

.ev {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 16px;
}

.ev .enum {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 11.5px;
  color: #fff;
  background: var(--accent);
  border-radius: 6px;
  padding: 3px 9px;
  white-space: nowrap;
  margin-top: 2px;
}

.ev .etype {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--accent);
}

.ev .edesc {
  font-size: 14.5px;
  margin: 1px 0 2px;
}

.ev .eaxes {
  font-size: 13px;
  color: var(--muted);
}

.ev .eaxes b {
  color: var(--ink);
  font-family: var(--mono);
  font-size: 11px;
}

.example .note {
  font-size: 13px;
  color: var(--muted);
  margin: 14px 0 4px;
}

.exgrid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
  align-items: start;
}

.rtable .why {
  color: var(--muted);
  font-size: 13px;
}

.g-footer {
  margin-top: 60px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
}

/* ---- interactive PASS/FAIL toggle buttons (Training + Evaluation pages) ---- */
.verdict-toggle {
  display: flex;
  gap: 8px;
}

.verdict-btn {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 12.5px;
  padding: 6px 14px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
}

.verdict-btn.pass-option.selected {
  color: var(--pass);
  background: var(--pass-bg);
  border-color: var(--pass);
}

.verdict-btn.fail-option.selected {
  color: var(--fail);
  background: var(--fail-bg);
  border-color: var(--fail);
}

.verdict-btn.correct {
  outline: 2px solid var(--pass);
}

.verdict-btn.incorrect {
  outline: 2px solid var(--fail);
}

.grade-mark {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 13px;
  margin-left: 8px;
}

.grade-mark.ok {
  color: var(--pass);
}

.grade-mark.bad {
  color: var(--fail);
}

.explanation-box {
  background: var(--fail-bg);
  border: 1px solid var(--fail);
  border-radius: 8px;
  padding: 10px 14px;
  margin-top: 8px;
  font-size: 13.5px;
  color: var(--ink);
}

/* ---- guideline overlay (opened from the Evaluation page) ---- */
.guideline-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  overflow-y: auto;
}

.guideline-overlay-close {
  position: fixed;
  top: 18px;
  right: 28px;
  z-index: 1001;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 10px rgba(22, 32, 44, 0.18);
}

.guideline-overlay-close:hover {
  background: var(--paper);
}

@media (max-width: 900px) {
  .g-wrap {
    grid-template-columns: 1fr;
  }
  .g-aside {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--line);
    padding: 26px 24px;
  }
  .g-aside nav {
    display: flex;
    flex-wrap: wrap;
    gap: 2px 18px;
  }
  .g-aside nav a {
    border-left: none;
    padding: 4px 0;
  }
  .g-aside nav a.active {
    border-left: none;
  }
  .g-main {
    padding: 36px 24px 80px;
  }
  .g-main h1 {
    font-size: 34px;
  }
  .exgrid {
    grid-template-columns: 1fr;
  }
}