:root{--plp-primary:#2446d8;--plp-primary-dark:#1834ad;--plp-accent:#18a37a;--plp-bg:#f5f7fb;--plp-surface:#fff;--plp-text:#172033;--plp-muted:#667085;--plp-border:#e4e8f0;--plp-danger:#b42318;--plp-radius:20px;--plp-shadow:0 12px 40px rgba(20,36,80,.08)}*{box-sizing:border-box}html{background:var(--plp-bg)}body.plp-app-body{margin:0;background:var(--plp-bg);color:var(--plp-text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Tahoma,Arial,sans-serif;line-height:1.65}.plp-app{min-height:100vh}.plp-topbar{height:76px;background:#fff;border-bottom:1px solid var(--plp-border);display:flex;align-items:center;gap:28px;padding:0 max(24px,calc((100vw - 1240px)/2));position:sticky;top:0;z-index:50}.plp-brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--plp-text);min-width:max-content}.plp-brand small{display:block;color:var(--plp-muted);font-size:12px}.plp-logo{width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,var(--plp-primary),#6d7cff);color:#fff;display:grid;place-items:center;font-weight:800;font-size:22px}.plp-desktop-nav{display:flex;align-items:center;gap:5px;flex:1;justify-content:center}.plp-desktop-nav a,.plp-user-actions a,.plp-auth-links>a{color:var(--plp-muted);text-decoration:none;padding:10px 12px;border-radius:12px}.plp-desktop-nav a.active{color:var(--plp-primary);background:#eef2ff;font-weight:700}.plp-user-actions,.plp-auth-links{display:flex;gap:8px;align-items:center}.plp-main{max-width:1240px;margin:0 auto;padding:34px 24px 100px}.plp-hero{display:grid;grid-template-columns:1.35fr .65fr;gap:34px;align-items:center;padding:54px 0}.plp-hero h1{font-size:clamp(34px,5vw,62px);line-height:1.14;margin:14px 0}.plp-hero p{font-size:20px;color:var(--plp-muted);max-width:760px}.plp-kicker{font-size:14px;color:var(--plp-primary);font-weight:800}.plp-hero-actions,.plp-exam-actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:24px}.plp-btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--plp-border);background:#fff;color:var(--plp-text);min-height:46px;padding:10px 18px;border-radius:14px;text-decoration:none;font:inherit;font-weight:700;cursor:pointer}.plp-btn-primary{background:var(--plp-primary);border-color:var(--plp-primary);color:#fff}.plp-btn-primary:hover{background:var(--plp-primary-dark)}.plp-hero-card,.plp-card,.plp-stat,.plp-action-card,.plp-question-card,.plp-result-hero,.plp-auth-card{background:var(--plp-surface);border:1px solid var(--plp-border);border-radius:var(--plp-radius);box-shadow:var(--plp-shadow)}.plp-hero-card{padding:26px}.plp-mini-stat{display:flex;justify-content:space-between;padding:16px 0;border-bottom:1px solid var(--plp-border)}.plp-mini-stat:last-child{border:0}.plp-mini-stat span{color:var(--plp-muted)}.plp-section{padding:30px 0}.plp-section h2,.plp-page-head h1{font-size:32px;margin:6px 0}.plp-grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.plp-grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.plp-card{padding:24px}.plp-card h2,.plp-card h3{margin-top:4px}.plp-card p{color:var(--plp-muted)}.plp-page-head{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin:8px 0 28px}.plp-page-head p{color:var(--plp-muted);margin:4px 0}.plp-stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:18px 0}.plp-stat{padding:22px}.plp-stat span{display:block;color:var(--plp-muted);font-size:14px}.plp-stat strong{display:block;font-size:32px;margin-top:6px}.plp-action-card{display:flex;justify-content:space-between;align-items:center;padding:24px;border-right:5px solid var(--plp-primary);margin-bottom:18px}.plp-action-card h2{margin:3px 0}.plp-action-card p{margin:0;color:var(--plp-muted)}.plp-link{color:var(--plp-primary);font-weight:800;text-decoration:none}.plp-feature{max-width:760px}.plp-meta{color:var(--plp-muted);margin:14px 0}.plp-empty,.plp-alert{padding:20px;border-radius:16px;background:#fff;border:1px dashed #c9d2e3;color:var(--plp-muted)}.plp-alert{border-style:solid;border-color:#f2c94c;background:#fffbeb;color:#7a5d00;margin-bottom:18px}.plp-exam-head{max-width:860px;margin:0 auto 18px}.plp-exam-head>div:first-child{display:flex;justify-content:space-between}.plp-progress{height:8px;background:#e9edf5;border-radius:999px;margin-top:14px;overflow:hidden}.plp-progress span{display:block;height:100%;background:var(--plp-primary)}.plp-question-card{max-width:860px;margin:auto;padding:28px}.plp-question-card h1{font-size:27px;line-height:1.6;margin-top:0}.plp-choice{display:flex;gap:14px;align-items:center;padding:16px;border:1px solid var(--plp-border);border-radius:15px;margin:10px 0;cursor:pointer}.plp-choice:hover{border-color:#aab6ef;background:#fafbff}.plp-choice input{width:20px;height:20px}.plp-choice-key{width:34px;height:34px;border-radius:10px;background:#eef2ff;display:grid;place-items:center;font-weight:800;color:var(--plp-primary)}.plp-flag{margin-inline-start:auto}.plp-result-hero{max-width:600px;margin:40px auto;padding:36px;text-align:center}.plp-result-hero span{color:var(--plp-muted)}.plp-result-hero strong{display:block;font-size:72px;color:var(--plp-primary)}.plp-list{display:grid;gap:10px}.plp-list-row{background:#fff;border:1px solid var(--plp-border);border-radius:14px;padding:17px 20px;display:flex;justify-content:space-between;align-items:center;text-decoration:none;color:var(--plp-text)}.plp-list-row small{display:block;color:var(--plp-muted)}.plp-timeline{display:grid;gap:16px;max-width:720px}.plp-timeline>div{display:flex;gap:16px;align-items:center;background:#fff;border:1px solid var(--plp-border);padding:18px;border-radius:16px}.plp-timeline b{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:#eef2ff;color:var(--plp-primary)}.plp-timeline small{display:block;color:var(--plp-muted)}.plp-plan strong{font-size:26px}.plp-plan li{margin:8px 0}.plp-plan.featured{border-color:#a9b5ff}.plp-subscription{max-width:680px}.plp-link-card{text-decoration:none;color:inherit}.plp-auth-card{max-width:480px;margin:60px auto;padding:28px}.plp-auth-card form{display:grid;gap:15px}.plp-auth-card label{display:grid;gap:7px;font-weight:700}.plp-auth-card input[type=text],.plp-auth-card input[type=email],.plp-auth-card input[type=password]{width:100%;padding:13px 14px;border:1px solid var(--plp-border);border-radius:12px;font:inherit}.plp-inline{display:flex!important;grid-template-columns:none!important;align-items:center;gap:8px!important}.plp-lesson-content{margin-top:14px;padding-top:14px;border-top:1px solid var(--plp-border)}.plp-mobile-nav{display:none}@media(max-width:960px){.plp-desktop-nav{display:none}.plp-main{padding-inline:18px}.plp-hero{grid-template-columns:1fr}.plp-stat-grid{grid-template-columns:repeat(2,1fr)}.plp-grid-3{grid-template-columns:1fr 1fr}.plp-topbar{padding-inline:18px}}@media(max-width:640px){body.plp-app-body{padding-bottom:76px}.plp-topbar{height:68px;gap:10px}.plp-brand small{display:none}.plp-brand b{font-size:15px}.plp-auth-links .plp-btn{display:none}.plp-main{padding:22px 15px 90px}.plp-hero{padding:24px 0}.plp-hero h1{font-size:36px}.plp-hero p{font-size:17px}.plp-grid-3,.plp-grid-2,.plp-stat-grid{grid-template-columns:1fr}.plp-page-head{align-items:flex-start;flex-direction:column}.plp-action-card{align-items:flex-start;flex-direction:column;gap:16px}.plp-question-card{padding:18px}.plp-question-card h1{font-size:21px}.plp-exam-actions{position:sticky;bottom:86px;background:#fff;padding-top:12px}.plp-mobile-nav{position:fixed;bottom:0;left:0;right:0;z-index:80;background:#fff;border-top:1px solid var(--plp-border);display:grid;grid-template-columns:repeat(5,1fr);padding:8px 6px max(8px,env(safe-area-inset-bottom))}.plp-mobile-nav a{text-decoration:none;color:var(--plp-muted);font-size:11px;text-align:center;padding:7px 2px;border-radius:10px}.plp-mobile-nav a.active{color:var(--plp-primary);background:#eef2ff;font-weight:700}.plp-result-hero strong{font-size:58px}.plp-choice{padding:14px}.plp-user-actions{margin-inline-start:auto}}

/* === v1.0.2 Student Experience refinement === */
:root{
  --plp-primary:#1856c9;
  --plp-primary-dark:#103d94;
  --plp-accent:#0a9c82;
  --plp-ink:#10233f;
  --plp-soft:#eef4ff;
  --plp-success-soft:#eaf8f3;
}
.plp-skip-link{position:fixed;top:-80px;right:16px;z-index:999;background:#101828;color:#fff;padding:10px 14px;border-radius:10px}
.plp-skip-link:focus{top:12px}
.plp-topbar{height:72px;background:rgba(255,255,255,.96);backdrop-filter:blur(16px);box-shadow:0 1px 0 rgba(16,35,63,.05)}
.plp-brand b{letter-spacing:-.02em}
.plp-desktop-nav a{display:flex;align-items:center;gap:7px;min-height:42px}
.plp-nav-icon{width:18px;height:18px;display:inline-grid;place-items:center}
.plp-nav-icon svg,.plp-icon-btn svg,.plp-btn svg,.plp-text-link svg,.plp-quick-item>svg,.plp-resume-icon svg,.plp-quick-icon svg{width:18px;height:18px;fill:currentColor;flex:none}
.plp-icon-btn{position:relative;width:42px;height:42px;display:grid!important;place-items:center;padding:0!important;background:#f7f9fc;border:1px solid var(--plp-border)}
.plp-badge{position:absolute;top:-4px;left:-4px;min-width:18px;height:18px;padding:0 5px;border-radius:999px;background:#d92d20;color:#fff;font-size:10px;display:grid;place-items:center;border:2px solid #fff}
.plp-main{max-width:1180px;padding-top:30px}
.plp-dashboard-welcome{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin:4px 0 24px;padding:10px 2px}
.plp-dashboard-welcome h1{font-size:clamp(30px,4vw,46px);line-height:1.16;margin:6px 0 8px;letter-spacing:-.035em;color:var(--plp-ink)}
.plp-dashboard-welcome p{margin:0;color:var(--plp-muted);font-size:16px}
.plp-welcome-actions{display:flex;gap:10px;flex-wrap:wrap}
.plp-welcome-actions .plp-btn{gap:8px}
.plp-resume-card{display:grid;grid-template-columns:54px 1fr auto;align-items:center;gap:16px;padding:20px;border-radius:22px;background:linear-gradient(135deg,#102f70,#1856c9);color:#fff;margin-bottom:18px;box-shadow:0 18px 50px rgba(24,86,201,.18)}
.plp-resume-icon{width:50px;height:50px;border-radius:16px;display:grid;place-items:center;background:rgba(255,255,255,.14)}
.plp-resume-icon svg{width:24px;height:24px}
.plp-resume-copy span{font-size:12px;opacity:.8}
.plp-resume-copy h2{margin:2px 0 3px;font-size:19px}
.plp-resume-copy p{margin:0;opacity:.8;font-size:13px}
.plp-resume-card .plp-btn{background:#fff;color:var(--plp-primary);border-color:#fff}
.plp-dashboard-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(300px,.75fr);gap:18px;margin-bottom:26px}
.plp-today-card,.plp-progress-card{background:#fff;border:1px solid var(--plp-border);border-radius:24px;padding:24px;box-shadow:0 10px 34px rgba(16,35,63,.055)}
.plp-today-card{background:linear-gradient(145deg,#fff 55%,#f3f7ff)}
.plp-card-head{display:flex;align-items:flex-start;justify-content:space-between;gap:18px}
.plp-card-head h2{margin:4px 0 0;font-size:22px;line-height:1.35;letter-spacing:-.015em}
.plp-time-chip{white-space:nowrap;border-radius:999px;background:var(--plp-success-soft);color:#06725e;font-weight:800;font-size:12px;padding:7px 10px}
.plp-today-card>p{color:var(--plp-muted);margin:14px 0 20px;max-width:680px}
.plp-btn-wide{width:100%;gap:8px}
.plp-progress-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:18px 0}
.plp-progress-metrics>div{padding:13px 8px;border-radius:14px;background:#f7f9fc;text-align:center}
.plp-progress-metrics strong{font-size:22px;display:block;color:var(--plp-ink)}
.plp-progress-metrics span{font-size:11px;color:var(--plp-muted)}
.plp-score-row{display:flex;align-items:center;justify-content:space-between;padding:14px 0;border-top:1px solid var(--plp-border)}
.plp-score-row span{color:var(--plp-muted);font-size:13px}
.plp-score-row strong{font-size:24px;color:var(--plp-primary)}
.plp-text-link{display:inline-flex;align-items:center;gap:4px;color:var(--plp-primary);font-weight:800;text-decoration:none;font-size:14px}
.plp-text-link svg{width:16px;height:16px}
.plp-quick-section{margin:0 0 26px}
.plp-section-title{display:flex;align-items:end;justify-content:space-between;margin-bottom:12px}
.plp-section-title h2{font-size:22px;margin:4px 0 0}
.plp-quick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.plp-quick-item{display:grid;grid-template-columns:44px 1fr 18px;gap:12px;align-items:center;padding:16px;background:#fff;border:1px solid var(--plp-border);border-radius:18px;color:var(--plp-text);text-decoration:none;transition:.18s ease}
.plp-quick-item:hover{transform:translateY(-2px);border-color:#bdccef;box-shadow:0 12px 28px rgba(16,35,63,.07)}
.plp-quick-icon{width:44px;height:44px;border-radius:14px;background:var(--plp-soft);color:var(--plp-primary);display:grid;place-items:center}
.plp-quick-icon svg{width:22px;height:22px}
.plp-quick-item b{display:block}
.plp-quick-item small{display:block;color:var(--plp-muted);font-size:11px;margin-top:2px}
.plp-quick-item>svg{color:#98a2b3}
.plp-dashboard-lower .plp-card{min-height:190px}
.plp-last-score{display:flex;align-items:baseline;gap:10px;margin:22px 0}
.plp-last-score strong{font-size:42px;color:var(--plp-primary);line-height:1}
.plp-last-score span{color:var(--plp-muted);font-size:13px}
.plp-empty-compact{padding:14px;margin-top:12px;font-size:13px}
.plp-mobile-nav a{display:flex!important;flex-direction:column;align-items:center;justify-content:center;gap:4px}
.plp-mobile-nav .plp-nav-icon{width:21px;height:21px}
.plp-mobile-nav .plp-nav-icon svg{width:21px;height:21px}
.plp-mobile-nav a span:last-child{font-size:10px}
@media(max-width:900px){
  .plp-dashboard-grid{grid-template-columns:1fr}
  .plp-quick-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  body.plp-app-body{padding-bottom:82px}
  .plp-main{padding-top:18px}
  .plp-dashboard-welcome{display:block;margin-bottom:18px}
  .plp-dashboard-welcome h1{font-size:31px}
  .plp-dashboard-welcome p{font-size:14px}
  .plp-welcome-actions{margin-top:15px}
  .plp-welcome-actions .plp-btn{flex:1}
  .plp-resume-card{grid-template-columns:44px 1fr;padding:16px;gap:12px}
  .plp-resume-icon{width:42px;height:42px;border-radius:13px}
  .plp-resume-card>.plp-btn{grid-column:1/-1;width:100%}
  .plp-today-card,.plp-progress-card{padding:18px;border-radius:20px}
  .plp-card-head h2{font-size:19px}
  .plp-progress-metrics{gap:6px}
  .plp-progress-metrics>div{padding:11px 5px}
  .plp-progress-metrics strong{font-size:20px}
  .plp-quick-grid{grid-template-columns:1fr 1fr;gap:9px}
  .plp-quick-item{grid-template-columns:38px 1fr 15px;padding:12px;gap:9px;border-radius:15px}
  .plp-quick-icon{width:38px;height:38px;border-radius:12px}
  .plp-quick-item small{display:none}
  .plp-dashboard-lower{grid-template-columns:1fr!important}
  .plp-mobile-nav{min-height:70px;padding-top:7px}
}
@media(max-width:390px){
  .plp-quick-grid{grid-template-columns:1fr}
  .plp-time-chip{display:none}
}

/* === v1.0.3 first-run UX === */
.plp-onboarding-steps{display:grid;gap:8px;margin-top:14px}
.plp-onboarding-steps a{
  display:grid;grid-template-columns:34px 1fr;align-items:center;gap:11px;
  padding:11px 12px;border:1px solid var(--plp-border);border-radius:14px;background:#fff;
  color:var(--plp-text);text-decoration:none;transition:.16s ease
}
.plp-onboarding-steps a:hover{border-color:#b9c8ef;background:#f9fbff}
.plp-onboarding-steps b{
  width:32px;height:32px;border-radius:10px;background:#eef4ff;color:var(--plp-primary);
  display:grid;place-items:center;font-size:13px
}
.plp-onboarding-steps strong{display:block;font-size:13px}
.plp-onboarding-steps small{display:block;color:var(--plp-muted);font-size:11px;margin-top:1px}
@media(max-width:640px){
  .plp-dashboard-welcome{padding-top:2px}
  .plp-dashboard-welcome h1{margin-top:3px}
  .plp-today-card,.plp-progress-card,.plp-card{box-shadow:0 6px 20px rgba(16,35,63,.045)}
  .plp-today-card{padding-bottom:16px}
  .plp-progress-metrics{margin:12px 0}
  .plp-mobile-nav{padding-bottom:calc(7px + env(safe-area-inset-bottom))}
}

/* v1.0.5 account registration + password recovery */
.plp-auth-intro{color:var(--plp-muted);margin:-4px 0 18px}
.plp-auth-options{display:flex;justify-content:space-between;align-items:center;gap:12px}
.plp-auth-options>a{color:var(--plp-primary);font-weight:700;text-decoration:none;font-size:13px}
.plp-field-help{display:block;color:var(--plp-muted);font-size:12px;margin-top:-8px}
.plp-success{padding:13px 14px;margin-bottom:16px;border-radius:13px;background:#ecfdf3;border:1px solid #abefc6;color:#067647}
@media(max-width:480px){.plp-auth-options{align-items:flex-start;flex-direction:column}}