/* ============================================================
   RC Tuner Training Course — "From Box to Podium"
   Dark theme matching dashboard.html design tokens
   ============================================================ */
:root{
  --bg:#0a0a0f;--bg2:#12121a;--bg3:#1a1a2e;
  --accent:#e94560;--accent2:#4ecca3;--accent3:#3b82f6;
  --text:#eee;--text2:#888;--border:#1e1e3a;
  --success:#4ecca3;--warn:#f0a500;--err:#e94560;
  --radius:12px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.6;font-size:15px;min-height:100vh;
}

/* ---------- Top bar ---------- */
.top{background:var(--bg2);padding:12px 24px;display:flex;justify-content:space-between;align-items:center;border-bottom:2px solid var(--accent);position:sticky;top:0;z-index:100;backdrop-filter:blur(10px);flex-wrap:wrap;gap:8px}
.top h1{font-size:1.2em;color:var(--accent);font-weight:700}
.top nav{display:flex;gap:4px;flex-wrap:wrap}
.top nav a{color:var(--text2);text-decoration:none;padding:6px 12px;border-radius:6px;font-size:.85em;transition:all .2s;white-space:nowrap}
.top nav a:hover{color:var(--text);background:var(--bg3)}
.top nav a.active{background:var(--accent);color:#fff}

.container{max-width:960px;margin:0 auto;padding:24px 20px 80px}

/* ---------- Course hero ---------- */
.course-hero{text-align:center;padding:36px 20px 28px}
.course-hero .flag{font-size:2.6em;margin-bottom:8px}
.course-hero h2{font-size:1.9em;font-weight:800;letter-spacing:-.5px}
.course-hero h2 .hl{color:var(--accent)}
.course-hero p{color:var(--text2);max-width:560px;margin:10px auto 0}
.course-progress-bar{max-width:480px;margin:22px auto 0;background:var(--bg3);border-radius:99px;height:14px;overflow:hidden;border:1px solid var(--border)}
.course-progress-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2));border-radius:99px;width:0;transition:width .6s ease}
.course-progress-label{font-size:.85em;color:var(--text2);margin-top:8px}

/* ---------- Module cards ---------- */
.module-list{display:flex;flex-direction:column;gap:14px;margin-top:12px}
.module-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px;display:flex;gap:16px;align-items:center;text-decoration:none;color:var(--text);transition:all .2s;position:relative}
.module-card.unlocked:hover{border-color:var(--accent);transform:translateX(4px)}
.module-card.locked{opacity:.55;cursor:default}
.module-num{width:52px;height:52px;border-radius:50%;background:var(--bg3);display:flex;align-items:center;justify-content:center;font-size:1.5em;flex-shrink:0;border:2px solid var(--border)}
.module-card.done .module-num{border-color:var(--success);background:#1a3a2e}
.module-card.in-progress .module-num{border-color:var(--warn)}
.module-info{flex:1;min-width:0}
.module-info h3{font-size:1.05em;font-weight:700}
.module-info h3 .mod-label{color:var(--accent);font-size:.8em;font-weight:600;text-transform:uppercase;letter-spacing:1px;display:block;margin-bottom:2px}
.module-info p{font-size:.85em;color:var(--text2);margin-top:2px}
.module-meta{display:flex;flex-direction:column;align-items:flex-end;gap:6px;flex-shrink:0}
.module-status{font-size:.75em;padding:3px 10px;border-radius:99px;font-weight:600;white-space:nowrap}
.module-status.done{background:#1a3a2e;color:var(--success)}
.module-status.in-progress{background:#3a2f1a;color:var(--warn)}
.module-status.not-started{background:var(--bg3);color:var(--text2)}
.module-status.soon{background:var(--bg3);color:var(--text2);border:1px dashed var(--border)}
.mini-progress{width:110px;background:var(--bg3);height:6px;border-radius:99px;overflow:hidden}
.mini-progress-fill{height:100%;background:var(--accent2);border-radius:99px;transition:width .4s}

/* ---------- Lesson layout (module pages) ---------- */
.lesson-nav-strip{display:flex;gap:8px;margin:18px 0 22px;flex-wrap:wrap}
.lesson-tab{flex:1;min-width:140px;background:var(--bg2);border:1px solid var(--border);border-radius:8px;padding:10px 12px;font-size:.82em;cursor:pointer;color:var(--text2);text-align:left;transition:all .2s;font-family:inherit}
.lesson-tab:hover{border-color:var(--accent);color:var(--text)}
.lesson-tab.active{border-color:var(--accent);color:var(--text);background:var(--bg3)}
.lesson-tab.completed .tab-check{color:var(--success)}
.lesson-tab .tab-num{display:block;font-size:.75em;text-transform:uppercase;letter-spacing:1px;color:var(--accent);font-weight:700}
.lesson-tab .tab-check{float:right;font-size:1.1em}

.lesson{display:none;animation:fadeIn .35s ease}
.lesson.active{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

.lesson-header{margin-bottom:18px}
.lesson-header .lesson-kicker{color:var(--accent);font-size:.8em;text-transform:uppercase;letter-spacing:1.5px;font-weight:700}
.lesson-header h2{font-size:1.6em;font-weight:800;margin-top:4px}
.lesson-header .lesson-sub{color:var(--text2);margin-top:6px}

.narration{background:var(--bg2);border:1px solid var(--border);border-left:4px solid var(--accent);border-radius:var(--radius);padding:18px 20px;margin-bottom:18px;font-size:1em}
.narration p+p{margin-top:10px}
.narration strong{color:var(--accent2)}

.widget-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:18px}
.widget-card h4{font-size:.85em;color:var(--text2);text-transform:uppercase;letter-spacing:.5px;margin-bottom:14px}

/* ---------- App tour grid ---------- */
.tour-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.tour-tile{background:var(--bg3);border:1px solid var(--border);border-radius:8px;padding:14px;cursor:pointer;transition:all .2s;position:relative}
.tour-tile:hover{border-color:var(--accent3);transform:translateY(-2px)}
.tour-tile.visited{border-color:var(--success)}
.tour-tile.visited::after{content:'✓';position:absolute;top:8px;right:10px;color:var(--success);font-weight:700}
.tour-tile .tile-icon{font-size:1.6em;margin-bottom:6px}
.tour-tile .tile-name{font-weight:700;font-size:.9em}
.tour-tile .tile-desc{font-size:.78em;color:var(--text2);margin-top:4px;line-height:1.4}
.tour-tile .tile-zone{display:inline-block;margin-top:8px;font-size:.68em;padding:2px 8px;border-radius:4px;font-weight:600;text-transform:uppercase;letter-spacing:.5px}
.tile-zone.build{background:#123324;color:#22c55e}
.tile-zone.analyze{background:#122336;color:#3b82f6}
.tile-zone.race{background:#362a12;color:#f59e0b}
.tile-zone.learn{background:#2a1236;color:#a855f7}

/* ---------- Forms (car profile) ---------- */
.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.form-field label{display:block;font-size:.8em;color:var(--text2);margin-bottom:5px;text-transform:uppercase;letter-spacing:.5px}
.form-field input,.form-field select{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;background:var(--bg3);color:var(--text);font-size:.95em;font-family:inherit}
.form-field input:focus,.form-field select:focus{outline:none;border-color:var(--accent)}
.profile-preview{margin-top:16px;background:var(--bg3);border:1px dashed var(--border);border-radius:8px;padding:14px 16px;font-size:.9em;display:none}
.profile-preview.show{display:block}
.profile-preview .pp-name{color:var(--accent2);font-weight:700;font-size:1.05em}

/* ---------- Checklist ---------- */
.checklist{display:flex;flex-direction:column;gap:10px}
.check-item{display:flex;gap:12px;align-items:flex-start;background:var(--bg3);border:1px solid var(--border);border-radius:8px;padding:12px 14px;cursor:pointer;transition:all .2s}
.check-item:hover{border-color:var(--accent)}
.check-item.checked{border-color:var(--success);background:#12241c}
.check-item input[type=checkbox]{width:18px;height:18px;margin-top:2px;accent-color:var(--success);cursor:pointer;flex-shrink:0}
.check-item .ci-body{flex:1}
.check-item .ci-name{font-weight:700;font-size:.95em}
.check-item .ci-name .ci-tag{font-size:.7em;padding:2px 8px;border-radius:4px;margin-left:8px;font-weight:600;vertical-align:middle}
.ci-tag.essential{background:#3a1a1a;color:var(--err)}
.ci-tag.recommended{background:#3a2f1a;color:var(--warn)}
.ci-tag.nice{background:#122336;color:var(--accent3)}
.check-item .ci-desc{font-size:.82em;color:var(--text2);margin-top:3px}
.checklist-summary{margin-top:14px;padding:12px 16px;border-radius:8px;background:var(--bg3);font-size:.9em;border:1px solid var(--border)}
.checklist-summary .cs-good{color:var(--success);font-weight:700}
.checklist-summary .cs-bad{color:var(--err);font-weight:700}

/* ---------- Quiz ---------- */
.quiz-q{margin-bottom:18px}
.quiz-q .q-text{font-weight:700;margin-bottom:10px}
.quiz-opts{display:flex;flex-direction:column;gap:8px}
.quiz-opt{background:var(--bg3);border:1px solid var(--border);border-radius:8px;padding:10px 14px;cursor:pointer;font-size:.9em;transition:all .15s;text-align:left;color:var(--text);font-family:inherit;width:100%}
.quiz-opt:hover{border-color:var(--accent3)}
.quiz-opt.correct{border-color:var(--success);background:#12241c;color:var(--success)}
.quiz-opt.wrong{border-color:var(--err);background:#2a1216;color:var(--err)}
.quiz-opt:disabled{cursor:default}
.quiz-feedback{font-size:.85em;margin-top:8px;display:none}
.quiz-feedback.show{display:block}
.quiz-feedback.good{color:var(--success)}
.quiz-feedback.bad{color:var(--err)}

/* ---------- Buttons ---------- */
.btn{background:var(--accent);color:#fff;border:none;padding:10px 20px;border-radius:8px;font-size:.9em;cursor:pointer;font-weight:600;transition:background .2s;display:inline-block;text-decoration:none;font-family:inherit}
.btn:hover{background:#d63a52}
.btn-sec{background:var(--bg3);color:var(--text);border:1px solid var(--border)}
.btn-sec:hover{background:#2a2a4e}
.btn-app{background:var(--accent3)}
.btn-app:hover{background:#2f6fd8}
.btn-done{background:var(--success);color:#0a0a0f}
.btn-done:hover{background:#3db88f}
.btn:disabled{opacity:.45;cursor:default}

.lesson-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:8px}
.lesson-footer{display:flex;justify-content:space-between;align-items:center;margin-top:28px;padding-top:18px;border-top:1px solid var(--border);gap:10px;flex-wrap:wrap}

/* ---------- Callouts / indicators ---------- */
.callout{border-radius:8px;padding:12px 16px;font-size:.88em;margin:14px 0;border:1px solid}
.callout.tip{border-color:#1a3a2e;background:#0f1f18;color:var(--success)}
.callout.warn{border-color:#3a2f1a;background:#1f1a0f;color:var(--warn)}
.callout .co-title{font-weight:700;display:block;margin-bottom:3px}
.indicator{display:inline-flex;align-items:center;gap:4px;font-size:.8em}
.indicator::before{content:'';width:8px;height:8px;border-radius:50%;display:inline-block}
.indicator.good::before{background:var(--success)}
.indicator.bad::before{background:var(--err)}

/* ---------- Completion banner ---------- */
.complete-banner{display:none;text-align:center;background:linear-gradient(135deg,#12241c,#122336);border:1px solid var(--success);border-radius:var(--radius);padding:28px;margin-top:24px}
.complete-banner.show{display:block;animation:fadeIn .5s ease}
.complete-banner h3{color:var(--success);font-size:1.4em;margin-bottom:8px}
.complete-banner p{color:var(--text2);margin-bottom:16px}

/* ---------- Responsive ---------- */
@media(max-width:640px){
  .container{padding:16px 12px 60px}
  .module-card{flex-direction:column;align-items:flex-start}
  .module-meta{flex-direction:row;align-items:center;width:100%;justify-content:space-between}
  .lesson-tab{min-width:calc(50% - 4px)}
  .course-hero h2{font-size:1.5em}
}