/* Rubrique Comprendre : sommaire et pages de leçon */
.lz { max-width: 920px; margin: 0 auto; padding: 14px 16px 30px; }
.lz-index { max-width: 1180px; }
.lz a { color: var(--accent2); }
.lz a.hcard, .lz a.btn { color: var(--text); }
.lz-crumb { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; font-size: 18px; color: var(--muted); margin-bottom: 8px; }
.lz-crumb a { text-decoration: none; }
.lz-crumb a:hover { color: var(--accent); }
.lz-head { margin: 6px 0 18px; }
.lz-kicker { font-family: var(--px); font-size: 11px; letter-spacing: 1px; color: var(--accent2); text-shadow: 2px 2px 0 #0f3a4a; margin-bottom: 8px; }
.lz-head h1 { font-family: var(--mono); font-weight: normal; font-size: clamp(32px, 6vw, 44px); line-height: 1; margin: 0 0 10px; color: #fff; text-shadow: 3px 3px 0 #000; }
.lz-intro { font-size: 21px; margin: 0 0 8px; max-width: 760px; color: #dfe3f2; }
.lz-units, .lz-meta, .lz-muted { color: var(--muted); font-size: 18px; margin: 4px 0; }
.lz-cta { margin: 12px 0 0; }
.lz-legend { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 19px; margin: 8px 0; }
.lz-foot { color: var(--muted); font-size: 17px; margin-top: 22px; }

/* couleurs des forces (mêmes que la légende du simulateur) */
.c-lift { color: #5dff8a; font-weight: normal; }
.c-weight { color: #ffb347; font-weight: normal; }
.c-thrust { color: #7fe0ff; font-weight: normal; }
.c-drag { color: #ff5f5f; font-weight: normal; }
.c-alpha { color: #ffd36b; font-weight: normal; }

/* étapes */
.lz-step { position: relative; background: var(--panel); border: 2px solid var(--line); border-bottom-width: 4px; padding: 12px 14px 12px; margin: 0 0 18px; }
.lz-sn { position: absolute; top: -2px; left: -2px; font-family: var(--px); font-size: 12px; background: var(--accent); color: #1a1505; padding: 6px 8px 5px; }
.lz-step h2 { font-family: var(--mono); font-weight: normal; font-size: 27px; color: var(--accent); margin: 0 0 6px 34px; line-height: 1.1; }
.lz-txt p { margin: 0 0 8px; font-size: 20px; line-height: 1.2; }
.lz-txt b { font-weight: normal; color: #fff; }
.lz-steps { margin: 6px 0 10px; padding-left: 26px; font-size: 20px; }
.lz-steps li { margin: 3px 0; }
.lz-steps b { color: var(--accent); font-weight: normal; }
.lz-wid { margin: 10px 0 8px; }
.lz-aside { margin: 8px 0; padding: 6px 10px; border-left: 4px solid var(--accent2); background: #10141f; font-size: 19px; }
.lz-aside b { color: var(--accent2); font-weight: normal; }
.lz-ret { margin: 10px 0 0; padding: 6px 10px; background: #1d2a1f; border: 2px solid #2d5a37; font-size: 20px; }
.lz-ret b { color: var(--green); font-weight: normal; text-transform: uppercase; letter-spacing: 1px; margin-right: 6px; }

/* défis */
.lz-tasks { list-style: none; margin: 8px 0 0; padding: 0; display: grid; gap: 4px; }
.lz-tasks li { display: flex; gap: 8px; align-items: flex-start; font-size: 19px; color: var(--muted); padding: 3px 6px; border: 2px dashed var(--line); }
.lz-tasks li.cur { color: var(--text); border-color: var(--accent); border-style: solid; }
.lz-tasks li.done { color: var(--green); border-color: #2d5a37; border-style: solid; background: #142017; }
.lz-tasks .tk { flex: none; width: 16px; height: 16px; margin-top: 2px; border: 2px solid currentColor; }
.lz-tasks li.done .tk { background: var(--green); box-shadow: inset 0 0 0 2px #142017; }

/* curseurs (grands, faciles au doigt) */
.lz-sl { display: block; margin: 6px 0 4px; }
.lz-sl-top { display: flex; justify-content: space-between; gap: 8px; font-size: 19px; }
.lz-sl-top b { color: var(--accent); font-weight: normal; }
.lz-sl input[type=range] { width: 100%; height: 30px; margin: 2px 0 0; cursor: pointer; touch-action: pan-y; }
.lz-sl-ends { display: flex; justify-content: space-between; font-size: 15px; color: var(--muted); }

/* soufflerie */
.tn { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 8px 12px; align-items: start; }
.tn-stage { position: relative; grid-column: 1; border: 2px solid #000; background: #0e1426; }
.tn-cv { display: block; width: 100%; aspect-ratio: 16 / 9; image-rendering: pixelated; image-rendering: crisp-edges; }
.tn-tag { position: absolute; right: 6px; bottom: 6px; font-size: 15px; background: rgba(5, 7, 12, .7); padding: 0 6px; color: var(--muted); }
.tn-cap { grid-column: 1; margin: 0; font-size: 16px; color: var(--muted); }
.tn-side { grid-column: 2; grid-row: 1 / span 3; display: flex; flex-direction: column; gap: 8px; }
.tn-ctl { grid-column: 1; }
.tn > .lz-tasks { grid-column: 1 / -1; }
.tn-read { background: #0f121c; border: 2px solid var(--line); padding: 6px 8px; }
.tn-pct { display: flex; align-items: baseline; gap: 6px; flex-wrap: wrap; font-size: 18px; }
.tn-pct b { font-size: 34px; color: #5dff8a; font-weight: normal; line-height: 1; }
.tn-pct .sm { color: var(--muted); font-size: 16px; }
.tn-meter { position: relative; height: 12px; margin: 6px 0 18px; background: #1c2133; border: 1px solid var(--line); }
.tn-fill { position: absolute; left: 0; top: 0; bottom: 0; background: repeating-linear-gradient(90deg, #5dff8a 0 4px, #3fbf67 4px 6px); }
.tn-mark { position: absolute; top: -4px; bottom: -4px; width: 2px; background: #ffb347; }
.tn-mark span { position: absolute; top: 18px; left: -14px; font-size: 14px; color: #ffb347; font-style: normal; }
.tn-verdict { margin: 0; font-size: 20px; }
.tn-verdict.up { color: var(--green); }
.tn-verdict.level { color: var(--accent2); }
.tn-verdict.down { color: var(--amber); }
.tn-verdict.stall { color: var(--red); }
.tn.stalled .tn-stage { border-color: #6b2a2a; }
.tn-lamp { display: flex; align-items: center; gap: 8px; font-size: 18px; color: var(--muted); background: #0f121c; border: 2px solid var(--line); padding: 4px 8px; }
.tn-lamp .led { width: 14px; height: 14px; background: #3a1c1c; border: 2px solid #000; }
.tn-lamp.on { color: #fff; border-color: var(--red); }
.tn-lamp.on .led { background: var(--red); box-shadow: 0 0 8px var(--red); animation: lzblink .5s steps(2) infinite; }
.tn-curve { background: #0f121c; border: 2px solid var(--line); padding: 4px; }
.tn-ccv { display: block; width: 100%; aspect-ratio: 200 / 112; image-rendering: pixelated; image-rendering: crisp-edges; }
.tn-curve .tn-cap { margin-top: 4px; }
.tn-presets { display: flex; gap: 8px; flex-wrap: wrap; margin: 6px 0; }
.tn-presets button { min-height: 36px; padding: 2px 14px; }
.tn-note { margin: 6px 0 0; font-size: 19px; }

/* boutons à maintenir (Tirer / Pousser) */
.lv-hold { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); gap: 8px; align-items: center; margin: 6px 0; }
.lv-hb { display: flex; flex-direction: column; align-items: center; min-height: 56px; font-size: 22px; touch-action: none; user-select: none; -webkit-user-select: none; -webkit-touch-callout: none; }
.lv-hb small { font-size: 14px; color: var(--muted); }
.lv-hb.pull { border-color: #5c4824; }
.lv-hb.push { border-color: #245c36; }
.lv-hb.on { background: #3a2f10; border-color: var(--accent); transform: translateY(2px); border-bottom-width: 2px; }
.lv-holdv { font-size: 18px; color: var(--accent); text-align: center; min-width: 5.5em; }

/* vol en direct */
.lv-stage { position: relative; border: 2px solid #000; background: #000; }
.lv-cv { display: block; width: 100%; aspect-ratio: 16 / 9; image-rendering: pixelated; image-rendering: crisp-edges; }
.lv-alarm { position: absolute; top: 8px; left: 50%; transform: translateX(-50%); font-family: var(--px); font-size: 14px; color: #fff; background: var(--red); padding: 6px 10px 5px; border: 2px solid #000; animation: lzblink .5s steps(2) infinite; pointer-events: none; }
.lv-over { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; background: rgba(8, 10, 18, .72); text-align: center; padding: 10px; }
.lv-over p { margin: 0; font-size: 24px; }
.lv-over .sm { font-size: 18px; color: var(--muted); margin-bottom: 8px; }
.lv-tools { position: absolute; left: 6px; top: 6px; display: flex; gap: 6px; }
.lv-tools button { min-width: 38px; min-height: 34px; padding: 2px 8px; background: rgba(28, 33, 51, .85); }
.lv.paused .lv-play { border-color: var(--accent); color: var(--accent); }
.lv-hud { display: grid; grid-template-columns: repeat(auto-fit, minmax(118px, 1fr)); gap: 4px; margin: 6px 0; }
.lv-hud div { background: #0f121c; border: 2px solid var(--line); padding: 2px 8px; }
.lv-hud span { display: block; font-size: 14px; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; }
.lv-hud b { font-weight: normal; font-size: 22px; color: #fff; }
.lv-hud .up b { color: var(--green); }
.lv-hud .down b { color: var(--amber); }
.lv-hud .warn b { color: var(--amber); }
.lv-hud .bad b { color: var(--red); }
.lv-bars { background: #0f121c; border: 2px solid var(--line); padding: 4px 8px; margin: 6px 0; }
.lv-bar { display: grid; grid-template-columns: 13em minmax(0, 1fr); gap: 8px; align-items: center; font-size: 17px; margin: 3px 0; }
.lv-bl i { font-style: normal; }
.lv-bl .c-lift, .lv-bl .c-weight, .lv-bl .c-thrust, .lv-bl .c-drag { font-size: 14px; }
.lv-track { display: grid; gap: 2px; }
.lv-fill { display: block; height: 7px; width: 0; transition: width .15s linear; }
.f-lift { background: #5dff8a; } .f-weight { background: #ffb347; }
.f-thrust { background: #7fe0ff; } .f-drag { background: #ff5f5f; }
.lv-bmsg { margin: 2px 0 0; font-size: 17px; color: var(--muted); }
.lv-extra { margin: 4px 0; font-size: 19px; }
.lv-ctl { margin-top: 4px; }
.lv-chk { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 8px; font-size: 18px; margin: 6px 0; cursor: pointer; }
.lv-chk input { width: 20px; height: 20px; }
.lv-leg { font-size: 15px; color: var(--muted); }
.lv-help { font-size: 16px; color: var(--muted); margin: 4px 0; }

/* fin de leçon */
.lz-end { margin-top: 26px; padding-top: 6px; border-top: 2px solid var(--line); }
.lz-end h2 { font-family: var(--mono); font-weight: normal; font-size: 30px; color: var(--green); margin: 8px 0; text-transform: uppercase; letter-spacing: 1px; }
.lz-end h3 { margin-top: 20px; }
.lz-recap { margin: 0; padding-left: 0; list-style: none; display: grid; gap: 4px; }
.lz-recap li { font-size: 20px; padding: 4px 10px 4px 26px; position: relative; background: var(--panel); border-left: 4px solid var(--green); }
.lz-recap li::before { content: '✓'; position: absolute; left: 8px; color: var(--green); }
.lz-links { margin-top: 4px; }
.lz-crashes { list-style: none; margin: 6px 0 0; padding: 0; display: grid; gap: 8px; }
.lz-crashes li { background: var(--panel); border: 2px solid var(--line); padding: 6px 10px; }
.lz-crashes a { display: block; font-size: 21px; color: var(--accent2); text-decoration: none; }
.lz-crashes a:hover { color: var(--accent); }
.lz-crashes span { font-size: 18px; color: #c9cde0; }

@keyframes lzblink { 50% { opacity: .35; } }
@media (prefers-reduced-motion: reduce) {
  .tn-lamp.on .led, .lv-alarm { animation: none; }
  .lv-fill { transition: none; }
}

@media (max-width: 720px) {
  .tn { grid-template-columns: minmax(0, 1fr); }
  .tn-stage, .tn-cap, .tn-ctl, .tn-side { grid-column: 1; grid-row: auto; }
  .tn-side { order: 1; }
  .tn-ctl { order: 2; }
  .tn > .lz-tasks { order: 3; }
  .tn-stage { order: 0; }
  .tn-cap { order: 0; }
  .lz-step { padding: 10px 10px 10px; }
  .lz-step h2 { font-size: 24px; }
  .lv-bar { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .lv-hud { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
.lz-txt p.lz-small { font-size: 17px; color: var(--muted); }
@media (hover: none) { .lv-help { display: none; } }
.lv-hb span { white-space: nowrap; }