body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Arial,sans-serif;background:#f6f8fc;color:#102040}header{background:#071938;color:#fff;padding:14px 4%;display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;position:sticky;top:0;z-index:20}.brand{font-weight:800;font-size:20px}.brand small{display:block;font-size:9px;letter-spacing:3px}header button{border:0;background:transparent;color:#fff;padding:8px 9px;font-weight:700}main{max-width:1120px;margin:auto;padding:34px 20px}.view{display:none}.active{display:block}.hidden{display:none!important}.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:center;min-height:420px}.hero h1{font-size:64px;line-height:1;margin:.2em 0}.hero h1 span{color:#673de6}.lead{font-size:20px;color:#667085}.hero-card,.card,#courseList article{background:#fff;border:1px solid #e4e9f2;border-radius:20px;padding:24px;box-shadow:0 10px 30px #0719380d}.hero-card{background:linear-gradient(135deg,#071938,#17325f);color:#fff}.eyebrow{font-size:12px;letter-spacing:2px;color:#673de6;font-weight:800}.primary,.secondary,.accept,.reject{padding:12px 16px;border-radius:10px;border:1px solid #dce2ec;font-weight:800}.primary{background:#673de6!important;color:#fff!important;border-color:#673de6!important}.secondary{background:#fff}.dash-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.wide{grid-column:span 4}.stat strong{display:block;font-size:28px;margin-top:10px;word-break:break-word}.progress{height:12px;background:#e8edf4;border-radius:999px;overflow:hidden}.progress i{display:block;width:0;height:100%;background:#1fa96f}.lesson-layout{display:grid;grid-template-columns:1fr 320px;gap:18px}.lesson-copy{font-size:18px;line-height:1.7}.info,.case{padding:18px;border-radius:14px;margin-top:16px}.info{background:#edf4ff}.case{background:#fff3e8}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.quiz-box{margin-top:20px;background:#f0f3f8;padding:20px;border-radius:14px}.question{padding:14px 0;border-bottom:1px solid #dfe5ee}.option{width:100%;display:block;text-align:left;background:#fff;border:1px solid #dce2ec;border-radius:9px;padding:11px;margin:7px 0}.option.selected{border-color:#673de6;background:#f1edff}.review{padding:12px;margin:10px 0;border-radius:9px}.good{background:#e8f8f0;color:#116b48}.bad{background:#fdecec;color:#972626}.filters{display:flex;gap:12px;flex-wrap:wrap;align-items:end}.filters label{display:block}.filters select{display:block;padding:10px;margin-top:6px}.sim-grid{display:grid;grid-template-columns:2fr 1fr;gap:18px}.chart{height:300px;background:#eef3fa;border-radius:12px;position:relative;overflow:hidden;padding-left:58px}
.sd-line{position:absolute;left:58px;right:0;border-top:1px solid #aab4c3}
.sd-line span{position:absolute;left:-52px;top:-10px;width:48px;text-align:right;font-size:12px;font-weight:700;color:#667085}
.sd-p3{top:8%}.sd-p2{top:22%}.sd-p1{top:36%}.sd-mean{top:50%;border-top:2px dashed #64748b}.sd-m1{top:64%}.sd-m2{top:78%}.sd-m3{top:92%}
.dot{position:absolute;width:18px;height:18px;border-radius:50%;background:#673de6;transform:translate(-50%,-50%);box-shadow:0 0 0 3px #ffffffaa}
.d1{left:43%;top:16.5%}.d2{left:70%;top:13.5%}
.dot-label{position:absolute;font-size:12px;font-weight:800;color:#673de6;background:#fff;padding:4px 6px;border-radius:6px;box-shadow:0 2px 8px #07193814}
.l1{left:35%;top:23%}.l2{left:62%;top:7%}.accept,.reject{display:block;width:100%;margin:10px 0;color:#fff}.accept{background:#1fa96f}.reject{background:#df4343}.modal{position:fixed;inset:0;background:#071938aa;display:grid;place-items:center;padding:20px;z-index:30}.box{background:#fff;padding:24px;border-radius:16px;width:min(420px,100%)}label{display:block;margin:12px 0}input{width:100%;padding:10px;box-sizing:border-box}#toast{position:fixed;right:20px;bottom:20px;z-index:40}.toast{background:#071938;color:#fff;padding:12px;border-radius:9px;margin-top:8px}@media(max-width:760px){.hero,.dash-grid,.lesson-layout,.sim-grid{grid-template-columns:1fr}.wide{grid-column:span 1}.hero h1{font-size:44px}header nav{order:3;width:100%}.filters{display:block}.filters label{margin-bottom:12px}}
.sim-controls{display:flex;gap:12px;align-items:end;flex-wrap:wrap;margin-bottom:18px}
.sim-controls label{margin:0;font-weight:700}
.sim-controls select{display:block;margin-top:6px;padding:10px 12px;border:1px solid #dce2ec;border-radius:10px;background:#fff}
.sim-note{margin-top:16px;padding:14px;border-radius:10px;background:#f8fafc;border:1px solid #e4e9f2;line-height:1.5}
.chart{height:330px;background:#eef3fa;border-radius:12px;position:relative;overflow:hidden;padding-left:62px}
.sd-line{position:absolute;left:62px;right:0;border-top:1px solid #aab4c3}
.sd-line span{position:absolute;left:-56px;top:-10px;width:52px;text-align:right;font-size:12px;font-weight:700;color:#667085}
.sd-p3{top:8%}.sd-p2{top:22%}.sd-p1{top:36%}.sd-mean{top:50%;border-top:2px dashed #64748b}.sd-m1{top:64%}.sd-m2{top:78%}.sd-m3{top:92%}
.qc-point{position:absolute;width:16px;height:16px;border-radius:50%;background:#673de6;transform:translate(-50%,-50%);box-shadow:0 0 0 3px #ffffffaa}
.qc-label{position:absolute;font-size:11px;font-weight:800;color:#673de6;background:#fff;padding:3px 5px;border-radius:6px;box-shadow:0 2px 8px #07193814;transform:translate(-50%,-50%)}

.profile-grid{display:grid;grid-template-columns:1.4fr .8fr;gap:18px}.profile-grid textarea{width:100%;box-sizing:border-box;padding:10px;border:1px solid #dce2ec;border-radius:9px;font:inherit}.activity-row{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid #e7ebf2}.module-heading{list-style:none;margin:16px 0 6px -20px;font-size:12px;letter-spacing:1.5px;color:#673de6;font-weight:900}.qb-score{font-size:34px;font-weight:900;margin-top:18px}@media(max-width:760px){.profile-grid{grid-template-columns:1fr}}
#lessonList{list-style:none;padding-left:0;margin-left:0}
#lessonList li:not(.module-heading){padding:5px 0 5px 4px}
#lessonList .module-heading{margin-left:0;padding-left:0}

.lesson-nav{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;margin-top:22px;padding-top:18px;border-top:1px solid #e4e9f2}
.lesson-nav span{text-align:center;font-weight:800;color:#667085}
.lesson-nav button:disabled{opacity:.45;cursor:not-allowed}
@media(max-width:600px){
  .lesson-nav{grid-template-columns:1fr 1fr}
  .lesson-nav span{grid-column:1/-1;grid-row:1}
  .lesson-nav #prevLessonBtn{grid-column:1}
  .lesson-nav #nextLessonBtn{grid-column:2}
}

.muted-line{color:#667085;font-size:14px;margin-top:10px}.activity-row small{display:block;color:#667085;margin-top:3px}

.my-courses-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.my-course-card{background:#fff;border:1px solid #e4e9f2;border-radius:20px;padding:22px;box-shadow:0 10px 30px #0719380d}
.my-course-card .course-meta{color:#667085;font-size:14px;margin:8px 0 16px}
.module-progress-card strong{display:block;font-size:24px;margin-top:10px}
.progress.mini{height:8px;margin-top:12px}
@media(max-width:760px){.my-courses-grid{grid-template-columns:1fr}}

.overview-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.overview-grid .card strong{display:block;margin:10px 0 16px}
.certificate-card{margin-top:18px}
.certificate-checks{display:grid;gap:10px;margin:18px 0;font-weight:700}
.certificate-checks span{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:50%;background:#eef2f7;margin-right:8px}
.certificate-checks span.ok{background:#e8f8f0;color:#116b48}
.lesson-search{width:100%;padding:11px 12px;border:1px solid #dce2ec;border-radius:10px;margin:8px 0 14px;font:inherit}
@media(max-width:760px){.overview-grid{grid-template-columns:1fr}}

.certificate-details{margin-top:16px;padding:14px;border-radius:10px;background:#f8fafc;border:1px solid #e4e9f2;line-height:1.6}
.achievement-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:16px}
.achievement{padding:18px;border-radius:16px;border:1px solid #e4e9f2;background:#f8fafc}
.achievement.locked{opacity:.5}
.achievement .icon{font-size:28px}
.achievement h3{margin:8px 0 5px}
.achievement p{margin:0;color:#667085}
@media(max-width:760px){.achievement-grid{grid-template-columns:1fr}}