/* Chapitre pilote : styles limités à .dt-shell ; les autres chapitres restent intacts. */
.dt-shell{--dt-navy:#123c50;--dt-green:#24664f;--dt-sage:#e9f1e8;--dt-peach:#f9eee2;--dt-border:#d9e2d8;max-width:1180px;margin:auto;color:var(--dt-navy);font-size:17px;line-height:1.75}
.dt-shell h1,.dt-shell h2,.dt-shell h3{color:var(--dt-navy)}
.dt-shell h2{font-size:28px;margin:10px 0 18px}.dt-shell h3{font-size:20px}.dt-kicker{font:700 12px/1.6 'DM Sans',Arial,sans-serif;letter-spacing:1.4px;color:var(--dt-green);text-transform:uppercase}
.dt-hero{display:flex;align-items:center;justify-content:space-between;gap:30px;background:var(--dt-sage);border:1px solid var(--dt-border);border-radius:24px;padding:36px 42px;overflow:hidden}
.dt-hero h1{font-size:clamp(32px,4vw,48px);line-height:1.15;margin:12px 0 16px;max-width:700px}.dt-hero p{margin:0;color:#476257}.dt-word-art{min-width:180px;display:grid;grid-template-columns:1fr 1fr;gap:10px;transform:rotate(-7deg)}.dt-word-art span{background:#fffefa;border:1px solid #d2dfd1;border-radius:14px;text-align:center;padding:8px 14px;font:italic 28px Georgia;box-shadow:0 5px 0 #ccdac9}.dt-word-art span:last-child{grid-column:1/3;background:#e8d5ad}
.dt-chapters{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0}.dt-chapters button{width:auto;flex:1;margin:0;border:1px solid var(--dt-border);padding:12px;justify-content:center;border-radius:10px;font-size:14px;min-height:48px}.dt-chapters button span{color:var(--dt-green);font-weight:700}.dt-chapters button[aria-current]{background:#234e40;color:white;border-color:#234e40}.dt-chapters button[aria-current] span{color:#d6e6ca}
.dt-tools{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:18px 0}.dt-tools .audio-tools{padding:0}.dt-tools button,.dt-tools label,.dt-tools select{font-size:14px}.dt-tools a{font-size:14px;text-underline-offset:4px}.dt-shell button{min-height:44px}.dt-shell button.primary{background:var(--dt-green);color:white;border-color:var(--dt-green)}
.dt-stage-nav{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:24px 0}.dt-stage-nav button{display:flex;align-items:center;justify-content:center;gap:10px;padding:14px 10px;border-radius:10px;font-size:14px;background:#fffefa;border-color:var(--dt-border)}.dt-stage-nav button span{font-weight:700}.dt-stage-nav button[aria-pressed=true]{background:var(--dt-navy);color:white;border-color:var(--dt-navy)}
.dt-body{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px;align-items:start}.dt-body>article{min-width:0}.dt-body #theory{display:grid;gap:24px}.dt-body #theory>section,.dt-tip{border-radius:16px;padding:28px;background:#fffefa;border:1px solid var(--dt-border)}.dt-body #theory .dt-situation{background:var(--dt-peach);border-color:#eedbc5}.dt-body #theory .dt-goals{background:transparent;padding:10px 18px;border:0}.dt-goals ul{list-style:none;padding:0;margin:14px 0 0}.dt-goals li{position:relative;padding-left:28px;margin:10px 0}.dt-goals li:before{content:'✓';position:absolute;left:0;color:var(--dt-green);font-weight:bold}.dt-tiles{display:grid;gap:12px;margin-top:24px}.dt-tiles>div{border-left:4px solid #93af8b;background:#f0f5ee;padding:16px 18px;border-radius:0 10px 10px 0}.dt-tiles h3{font:700 14px Arial;margin:0 0 8px;color:var(--dt-green)}.dt-tiles strong{display:block;font-size:20px;margin-bottom:6px}.dt-tiles p{font-size:15px;margin:0}.dt-question{font:22px/1.6 Georgia;padding:12px 0;border-bottom:1px solid var(--dt-border)}.dt-steps{padding:0;list-style:none;counter-reset:step}.dt-steps li{counter-increment:step;position:relative;padding-left:44px;margin:20px 0}.dt-steps li:before{content:counter(step);position:absolute;left:0;top:2px;border-radius:50%;background:var(--dt-sage);color:var(--dt-green);width:30px;height:30px;line-height:30px;text-align:center;font-weight:bold}.dt-answer{border-radius:10px;background:#e7f0e2;padding:16px;font-weight:600}.dt-answer .word{display:block;margin-top:10px;text-align:left}.dt-tip{border-left:4px solid #c99a51;background:#fff5df;font-size:15px}.dt-tip p{margin:8px 0 0}.dt-recall p{margin:12px 0}.dt-recall summary{cursor:pointer;text-decoration:underline;text-underline-offset:4px}
.dt-practice-heading{padding:24px 4px 8px}.dt-practice-heading p{font-size:15px;color:#52645d}.dt-shell .exercise{background:#fffefa;border:1px solid var(--dt-border);border-radius:16px;margin:0 0 20px;padding:24px}.dt-shell .exercise.completed{border-color:#72976d}.dt-shell .exhead h3{font-size:18px;line-height:1.5}.dt-shell .number{border-radius:50%;min-width:32px;height:32px}.dt-shell .item{padding:20px 0}.dt-shell .prompt{font-size:16px}.dt-shell .prompt>label{min-width:0;flex-basis:100%}.dt-shell .options{display:grid;grid-template-columns:1fr;gap:8px}.dt-shell .options label{padding:10px 12px;font-size:16px;border-radius:8px}.dt-shell input[type=text]{border:1px solid #a4b9a0;border-radius:8px;background:#f8faf5;padding:12px}.dt-shell .word{font-size:13px;white-space:normal}.dt-shell .exactions{display:grid;grid-template-columns:1fr;gap:8px}.dt-shell .exactions button{font-size:14px}.dt-shell .feedback{padding:14px;font-size:15px;line-height:1.65;margin-top:12px;border-radius:8px}.dt-hint{padding:12px 14px;margin:0 0 16px;background:#f5efdd;border-radius:10px;font-size:15px}.dt-hint summary{cursor:pointer;color:#735421;font-weight:600;min-height:28px}.dt-hint p{margin:10px 0 0}.dt-shell .exercise-pages{padding-bottom:0}
.dt-finish{display:flex;align-items:center;justify-content:space-between;gap:20px;background:var(--dt-sage);border-radius:14px;padding:22px 28px;margin:28px 0}.dt-finish p{margin:0;font-size:16px}.dt-finish button{white-space:nowrap}.dt-shell .booknav{padding-top:16px;border-top:1px solid var(--dt-border)}.dt-shell .booknav button{min-width:0}.dt-shell .pagelocator{flex-wrap:wrap;justify-content:center}
.dt-review{margin-top:32px;background:#fffefa;border:1px solid var(--dt-border);border-radius:18px;padding:32px}.dt-review h2{font-size:32px}.dt-table{overflow-x:auto;border:1px solid var(--dt-border);border-radius:10px}.dt-table table{min-width:780px;margin:0;font-size:15px;line-height:1.65}.dt-table caption{text-align:left;padding:14px;font-weight:700;background:#f0f5ee}.dt-table th,.dt-table td{padding:14px;overflow-wrap:normal;min-width:140px;vertical-align:top}.dt-table thead th{background:#234e40;color:#fff}.dt-table tbody th{background:#f0f4ec;min-width:190px}.dt-table tr:nth-child(even) td{background:#faf8ef}.dt-scroll-note,.dt-review-notes{font-size:14px;color:#52645d}.dt-review-notes{margin:20px 0}.dt-checklist{padding:20px;background:var(--dt-peach);border-radius:12px;margin:24px 0}.dt-checklist h3{margin:0 0 10px}.dt-checklist p{margin:0}
.local-preview{background:#e8efe4;color:#254e3a;padding:10px 4%;font-size:13px;text-align:center}.local-preview a{margin-left:16px}.dt-shell a:focus-visible,.dt-table:focus-visible{outline:3px solid #a9702c;outline-offset:4px}
@media(max-width:1000px){.dt-body{grid-template-columns:1fr}.dt-body #theory{grid-template-columns:1fr 1fr}.dt-body #theory>.dt-mini,.dt-body #theory>.dt-model,.dt-body #theory>.dt-recall{grid-column:1/-1}.dt-tip{grid-column:1/-1}.dt-tiles{grid-template-columns:repeat(3,1fr)}.dt-shell .exercise-pair{display:grid;grid-template-columns:1fr 1fr;gap:18px}.dt-word-art{display:none}}
@media(max-width:650px){#main:has(.dt-shell){padding:18px 14px 30px}.dt-shell{font-size:17px}.dt-hero{padding:26px 22px;border-radius:18px}.dt-hero h1{font-size:34px}.dt-hero p{font-size:16px}.dt-kicker{font-size:11px;letter-spacing:1px}.dt-shell .readingbar{font-size:10px;align-items:start}.dt-chapters{display:grid;grid-template-columns:1fr 1fr}.dt-chapters button{font-size:13px;justify-content:flex-start;padding:10px}.dt-tools{display:block}.dt-tools .audio-tools{margin-bottom:12px}.dt-tools .audio-tools label{margin-left:0}.dt-stage-nav{gap:6px}.dt-stage-nav button{font-size:12px;flex-direction:column;gap:4px;padding:10px 6px;line-height:1.45}.dt-body,.dt-body #theory,.dt-tiles,.dt-shell .exercise-pair{display:block}.dt-body #theory>section,.dt-body #theory>.dt-tip{padding:22px;margin:0 0 20px}.dt-tiles>div{margin-bottom:12px}.dt-shell h2{font-size:26px}.dt-shell .exercise{padding:20px}.dt-finish{display:block;padding:20px}.dt-finish p{margin-bottom:16px}.dt-finish button{width:100%;white-space:normal}.dt-review{padding:22px 16px}.dt-shell .booknav{flex-wrap:wrap;gap:12px}.dt-shell .pagelocator{order:-1;width:100%;justify-content:space-between}.dt-shell .booknav>button{flex:1;font-size:12px}.dt-shell .pagelocator select{max-width:210px}.local-preview{font-size:12px}.dt-shell .feedback{overflow-wrap:anywhere}}
@media print{.dt-stage-nav,.dt-tools,.dt-chapters,.local-preview,.dt-finish{display:none}.dt-body{display:block}.dt-body #theory{display:block}.dt-shell .exercise-pair[hidden]{display:block!important}.dt-table{overflow:visible}.dt-table table{min-width:0;font-size:10px}.dt-table th,.dt-table td{min-width:0;padding:7px}.dt-review{break-before:page}.dt-shell .exercise{break-inside:avoid}}
/* Direction éditoriale Lexis : bandeaux, accords en couleurs et comparaisons. */
body:has(.dt-shell){background:#fffefa}.dt-hero{background:white;border:0;border-bottom:3px solid var(--dt-navy);border-radius:0;padding:20px 0 28px;justify-content:flex-start}.dt-chapter-square{align-self:flex-start;background:var(--dt-navy);color:white;min-width:72px;height:76px;display:flex;align-items:center;justify-content:center;font:36px Georgia}.dt-hero>div:nth-child(2){flex:1}.dt-hero .dt-subtitle{display:inline-block;background:var(--dt-navy);color:white;padding:7px 18px;font-size:15px;letter-spacing:.4px}.dt-word-art{margin:10px 10px 10px 0}.dt-body #theory>.dt-mini,.dt-body #theory>.dt-model{border:0;padding:12px 4px;border-radius:0}.dt-mini>h2{background:var(--dt-navy);color:white;padding:12px 16px;font-size:25px}.dt-model>h2{border-bottom:2px solid #3d896d;padding-bottom:14px}.dt-tiles>div:nth-child(2){background:#f9edf1;border-color:#b86685}.dt-tiles>div:nth-child(3){background:#e8f4ee;border-color:#3d896d}.dt-diagram{margin:26px 0;background:#fff;border:1px solid #d7e1e2;padding:18px}.dt-diagram figcaption{font-size:11px;letter-spacing:1.3px;font-weight:bold;color:var(--dt-navy);margin-bottom:12px}.dt-agreement{display:flex;gap:12px;align-items:center;font-size:13px;line-height:1.5;margin-bottom:18px}.dt-agreement>span:nth-child(2){font-size:27px;color:#417d63}.dt-forms{display:grid;grid-template-columns:1fr 1fr;gap:12px}.dt-forms>div{padding:12px;border-bottom:2px solid #527f9b;background:#eef5fa}.dt-forms>div.dt-feminine{background:#fbf0f3;border-color:#ab5e7c}.dt-forms small{font-size:11px;font-weight:600;color:#355b73}.dt-forms .dt-feminine small{color:#8d405f}.dt-forms p{font-size:20px;margin:8px 0 0;line-height:1.6}.dt-forms b{color:#07558a;border-bottom:2px solid #07558a}.dt-forms .dt-feminine b{color:#a53062;border-color:#a53062}.dt-diagram .dt-diagram-note{font-size:13px;margin:16px 0 0;color:#52645d}.dt-shell .exercise{border-radius:7px}.dt-shell .exhead{border-bottom:2px solid #ccdcd1;margin-bottom:18px}.dt-shell .number{border-radius:0}.dt-shell .dt-kicker{display:inline-block}.dt-review{border-radius:8px;border-top:5px solid var(--dt-navy)}.dt-hero h1{margin-top:8px}
@media(max-width:650px){.dt-hero{gap:16px;align-items:flex-start}.dt-chapter-square{min-width:46px;height:52px;font-size:25px}.dt-hero h1{font-size:30px;overflow-wrap:anywhere}.dt-hero .dt-subtitle{font-size:12px;padding:6px 10px}.dt-hero .dt-kicker{font-size:10px}.dt-body #theory>.dt-mini,.dt-body #theory>.dt-model{padding:8px 2px}.dt-diagram{padding:14px}.dt-forms{gap:8px}.dt-forms>div{padding:10px}.dt-forms p{font-size:18px}.dt-forms small{font-size:10px}.dt-agreement{font-size:12px}.dt-hero>div:nth-child(2){min-width:0}}