/* Training courses (training/*.html): the pieces a course is built from.
   Each course page loads 20below.css (via brand-head.html), then this,
   then docs/assets/js/training.js, which makes the interactive pieces
   work. Everything still reads in order without the script. */

:root { --measure: 760px; }

.course-hero {
  border-bottom: 1px solid var(--panel-border);
  padding-bottom: 1.5rem;
  margin-bottom: 1.5rem;
}
.course-hero .eyebrow {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-dim);
  margin: 1.5rem 0 0.5rem;
}
.course-hero .intro { color: var(--text-dim); line-height: 1.7; font-size: 1.05rem; margin: 0.5rem 0 0; }

/* Contents: one chip per lesson, ticked when the lesson is marked done. */
.course-toc { margin: 0 0 2.5rem; }
.course-toc h2 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--text-dim); margin: 0 0 0.6rem; }
.course-toc ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.35rem; }
.course-toc .part { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--text-dim); margin-top: 0.8rem; }
.course-toc a {
  display: flex; justify-content: space-between; gap: 1rem;
  padding: 0.5rem 0.8rem;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
}
.course-toc a:hover, .course-toc a:focus-visible { border-color: var(--accent); }
.course-toc a .tick { color: var(--text-dim); font-size: 0.85rem; white-space: nowrap; }
.course-toc a.done .tick { color: var(--accent); }
.course-progress { color: var(--text-dim); font-size: 0.9rem; margin: 0.8rem 0 0; }

/* A lesson */
.lesson { border-top: 1px solid var(--panel-border); padding: 2rem 0 1rem; scroll-margin-top: 5.5rem; }
.lesson > .lesson-num { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--text-dim); margin: 0; }
.lesson > h2 { margin: 0.3rem 0 1.2rem; }
.lesson h3 { margin: 1.8rem 0 0.6rem; }
.lesson p, .lesson li { line-height: 1.7; }
.lesson-done {
  margin: 2rem 0 0;
  font: inherit; font-weight: 700; cursor: pointer;
  background: transparent; color: var(--accent);
  border: 1px solid var(--accent); border-radius: 999px;
  padding: 0.45rem 1.2rem;
}
.lesson-done[aria-pressed="true"] { background: var(--accent-dim); }

/* Statement: one line to remember */
.statement {
  margin: 2rem 0;
  padding: 1.2rem 1.4rem;
  border-left: 4px solid var(--accent);
  background: var(--panel);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-family: var(--font-head);
  font-size: 1.5rem;
  line-height: 1.3;
  letter-spacing: 0.02em;
}

/* A quoted example */
.example {
  margin: 1rem 0;
  padding: 1rem 1.2rem;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  background: var(--panel);
}
.example p { margin: 0 0 0.5rem; }
.example p:last-child { margin: 0; }

/* Accordion: native details/summary */
.accordion { border: 1px solid var(--panel-border); border-radius: var(--radius); overflow: hidden; margin: 1rem 0; }
.accordion details + details { border-top: 1px solid var(--panel-border); }
.accordion summary {
  cursor: pointer; list-style: none;
  padding: 0.85rem 1.1rem;
  font-weight: 700;
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  background: var(--panel);
}
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::after { content: "+"; color: var(--accent); font-size: 1.3rem; line-height: 1; }
.accordion details[open] summary::after { content: "\2212"; }
.accordion details > div { padding: 0.2rem 1.1rem 0.9rem; }
.accordion details > div p { margin: 0.5rem 0 0; }

/* Steps: a numbered process */
.steps { list-style: none; counter-reset: step; padding: 0; margin: 1rem 0; display: grid; gap: 0.6rem; }
.steps li {
  counter-increment: step;
  position: relative;
  padding: 0.8rem 1rem 0.8rem 3.4rem;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  background: var(--panel);
}
.steps li::before {
  content: counter(step);
  position: absolute; left: 0.9rem; top: 0.8rem;
  width: 1.8rem; height: 1.8rem; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--accent); color: #fff; font-weight: 700; font-size: 0.9rem;
}
.steps li strong { display: block; }

/* Tabs */
.tabs { border: 1px solid var(--panel-border); border-radius: var(--radius); margin: 1rem 0; overflow: hidden; }
.tabs [role=tablist] { display: flex; flex-wrap: wrap; border-bottom: 1px solid var(--panel-border); background: var(--panel); }
.tabs [role=tab] {
  font: inherit; font-size: 0.85rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em;
  background: none; border: 0; color: var(--text-dim);
  padding: 0.75rem 0.9rem; cursor: pointer; border-bottom: 3px solid transparent;
}
.tabs [role=tab][aria-selected="true"] { color: var(--accent); border-bottom-color: var(--accent); }
.tabs [role=tabpanel] { padding: 1rem 1.1rem; }
.tabs [role=tabpanel] p { margin: 0; }
/* Without the script, every panel shows under its own heading. */
.tabs:not(.ready) .tab-label { display: block; font-weight: 700; margin-bottom: 0.3rem; }
.tabs.ready .tab-label { display: none; }

/* Flashcards: click to flip */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 13rem), 1fr)); gap: 0.8rem; margin: 1rem 0; }
.card {
  font: inherit; color: var(--text); text-align: center; cursor: pointer;
  min-height: 9rem; padding: 1rem;
  border: 1px solid var(--panel-border); border-top: 3px solid var(--accent);
  border-radius: var(--radius); background: var(--panel);
  display: grid; place-items: center; gap: 0.4rem;
}
.card .side-label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--text-dim); }
.card .face { font-size: 1.05rem; line-height: 1.4; }
.card .back { display: none; }
.card[aria-pressed="true"] .front { display: none; }
.card[aria-pressed="true"] .back { display: block; }
.card[aria-pressed="true"] { border-top-color: #4fbf8a; }

/* Sorting: pick a pile for each item */
.sort { margin: 1rem 0; display: grid; gap: 0.6rem; }
.sort-item { border: 1px solid var(--panel-border); border-radius: var(--radius); background: var(--panel); padding: 0.8rem 1rem; }
.sort-item p { margin: 0 0 0.6rem; }
.sort-item .choices { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.sort-item button, .kc button.check, .final button.check {
  font: inherit; font-size: 0.88rem; cursor: pointer;
  border: 1px solid var(--panel-border); border-radius: 999px;
  background: #0a1720; color: var(--text);
  padding: 0.35rem 0.85rem;
}
.sort-item button:hover, .sort-item button:focus-visible { border-color: var(--accent); }
.sort-item button.right { border-color: #4fbf8a; background: rgba(79, 191, 138, 0.15); }
.sort-item button.wrong { border-color: #ff9b8a; background: rgba(255, 155, 138, 0.12); }
.sort-item .result, .kc .result { margin: 0.6rem 0 0; font-size: 0.92rem; line-height: 1.5; }
.sort-score { color: var(--text-dim); margin: 0.4rem 0 0; }

/* Knowledge checks and the final check */
.kc, .final .q {
  margin: 1.5rem 0;
  padding: 1rem 1.2rem 1.1rem;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  background: var(--panel);
}
.kc fieldset, .final fieldset { border: 0; margin: 0; padding: 0; }
.kc legend, .final legend { font-weight: 700; line-height: 1.5; padding: 0; margin-bottom: 0.6rem; }
.kc .kc-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--accent); margin: 0 0 0.4rem; }
.kc label, .final label {
  display: flex; gap: 0.6rem; align-items: flex-start;
  padding: 0.45rem 0.6rem; margin: 0.25rem 0;
  border: 1px solid transparent; border-radius: 8px; cursor: pointer; line-height: 1.5;
}
.kc label:hover, .final label:hover { border-color: var(--panel-border); }
.kc input, .final input { margin-top: 0.3rem; accent-color: var(--accent); }
.kc button.check, .final button.check { margin-top: 0.6rem; font-weight: 700; color: var(--accent); border-color: var(--accent); background: transparent; }
.result.right { color: #8fe0b4; }
.result.wrong { color: #ff9b8a; }
.final .score {
  padding: 1rem 1.2rem; border-radius: var(--radius);
  border: 1px solid var(--accent); background: var(--accent-dim); line-height: 1.6;
}
.final .q.right { border-color: #4fbf8a; }
.final .q.wrong { border-color: #ff9b8a; }

[hidden] { display: none !important; }