/* CSE Mastery UI 2.0 — unified, role-focused design layer */
:root{
  --ui-primary:#1d4ed8;
  --ui-primary-dark:#173ea6;
  --ui-success:#15803d;
  --ui-danger:#b91c1c;
  --ui-ink:#172033;
  --ui-muted:#667085;
  --ui-line:#e5e9f2;
  --ui-surface:#ffffff;
  --ui-bg:#f5f7fb;
  --ui-radius:16px;
  --ui-shadow:0 8px 26px rgba(15,23,42,.07);
}
html{background:var(--ui-bg)}
body{background:var(--ui-bg);color:var(--ui-ink);font-size:16px;line-height:1.55}
.app-shell{background:var(--ui-bg)}
.sidebar{background:#111a2e;border-right:0;box-shadow:8px 0 30px rgba(15,23,42,.08)}
.brand{min-height:78px;padding:16px 18px;border-bottom:1px solid rgba(255,255,255,.08)}
.brand-mark{width:42px;height:42px;border-radius:12px;background:#fff;padding:5px}
.brand span b{font-size:15px;letter-spacing:.045em}.brand span small{font-size:10px;opacity:.7}
.sidebar nav{padding:14px 10px}.sidebar nav a{position:relative;min-height:48px;padding:10px 12px;border-radius:12px;margin:3px 0;color:#cbd5e1;gap:11px}
.sidebar nav a i{width:27px;height:27px;display:grid;place-items:center;border-radius:8px;background:rgba(255,255,255,.06);font-style:normal}
.sidebar nav a:hover{background:rgba(255,255,255,.07);color:#fff}.sidebar nav a.active{background:var(--ui-primary);color:#fff;box-shadow:0 8px 22px rgba(29,78,216,.28)}
.sidebar nav a.active i{background:rgba(255,255,255,.17)}
.nav-access-note,.nav-lock{margin-left:auto!important;font-size:9px!important;opacity:.75;white-space:nowrap}
.sidebar-bottom{padding:12px}.sidebar-plan-card,.streak-card,.profile{border-radius:13px}
.workspace{background:var(--ui-bg)}
.topbar{min-height:72px;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--ui-line);padding:10px clamp(16px,3vw,34px);position:sticky;top:0;z-index:80}
.topbar>div:first-of-type span{font-size:10px;letter-spacing:.11em;color:var(--ui-muted)}.topbar>div:first-of-type b{font-size:14px;color:var(--ui-ink)}
.top-pills{gap:8px}.top-pills>span,.top-pills>b{font-size:11px;border:1px solid var(--ui-line);background:#fff;color:var(--ui-muted);padding:7px 10px;border-radius:999px}
.content{width:min(1260px,100%);margin:0 auto;padding:clamp(18px,3vw,34px)}
.panel,.dashboard-pulse article,.subject-card,.metric-grid article,.question-shell,.answer-review{border:1px solid var(--ui-line);border-radius:var(--ui-radius);box-shadow:var(--ui-shadow);background:var(--ui-surface)}
.page-title{align-items:center;margin-bottom:18px}.page-title h1{font-size:clamp(26px,3vw,38px);line-height:1.15;color:var(--ui-ink)}.page-title p{color:var(--ui-muted)}
.kicker,.panel-head span,.section-head span{color:var(--ui-primary)!important;letter-spacing:.1em;font-size:10px}
.btn,.hero-btn,.subscription-gate-primary{min-height:44px;border-radius:11px;font-weight:700;transition:transform .16s ease,box-shadow .16s ease}.btn:hover,.hero-btn:hover{transform:translateY(-1px)}
.btn.primary,.primary-action,.subscription-gate-primary{background:var(--ui-primary)!important;border-color:var(--ui-primary)!important;color:#fff!important}.btn.primary:hover{background:var(--ui-primary-dark)!important}
.btn.danger{background:var(--ui-danger)!important;color:#fff!important}.alert.success{border-color:#bbf7d0;background:#f0fdf4;color:#166534}.alert.danger{border-color:#fecaca;background:#fef2f2;color:#991b1b}
.dashboard-hero{border-radius:22px;min-height:350px;background:linear-gradient(135deg,#14244a 0%,#1d4ed8 72%,#3b82f6 100%);box-shadow:0 18px 50px rgba(29,78,216,.19)}
.dashboard-hero h1{font-size:clamp(35px,5vw,60px);max-width:770px}.dashboard-hero .hero-copy>p:not(.hero-eyebrow){max-width:660px}
.hero-actions{grid-template-columns:minmax(250px,1.35fr) repeat(2,minmax(190px,1fr));gap:10px}.hero-btn{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18)}.hero-btn.primary-action{background:#fff!important;color:#172033!important;border-color:#fff!important}
.dashboard-pulse{gap:12px;margin:16px 0}.dashboard-pulse article{padding:18px}.dashboard-pulse article i{background:#eff6ff;color:var(--ui-primary)}
.dash-grid{gap:16px}.panel{padding:20px}.subject-grid{gap:12px}.subject-card{padding:18px}.subject-card p{min-height:0;color:var(--ui-muted)}
.role-admin .dashboard-hero,.role-admin .dashboard-pulse,.role-admin .mastery-head,.role-admin .dashboard-subjects,.role-admin .premium-welcome-bar{display:none!important}
.role-admin.page-dashboard .content{max-width:1200px}
.role-admin .sidebar-plan-card.admin-plan{background:rgba(29,78,216,.22);border-color:rgba(96,165,250,.35)}
.admin-summary-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.admin-summary-grid article{padding:18px}.admin-summary-grid article b{font-size:28px}
.admin-grid{gap:16px}.performance-table>div{border-bottom:1px solid var(--ui-line)}
.performance-table,.table-wrap{border:1px solid var(--ui-line);border-radius:14px;background:#fff;overflow:auto}.performance-table>div:first-child,table thead th{position:sticky;top:0;background:#f8fafc;z-index:2}
input,select,textarea{min-height:44px;border:1px solid #d7deea!important;border-radius:10px!important;background:#fff!important;color:var(--ui-ink)!important;font-size:15px!important}textarea{min-height:110px}label{font-size:13px;color:#344054}
.review-modes{gap:8px;overflow-x:auto;padding-bottom:5px}.review-modes a{min-width:160px;border-radius:12px}.question-shell{max-width:920px;margin-inline:auto}.question-shell h2{font-size:clamp(21px,3vw,31px);line-height:1.35}.answer-list{gap:10px}.answer-list label{min-height:58px;border-radius:12px}
.mobile-bottom{background:rgba(255,255,255,.98);border-top:1px solid var(--ui-line);box-shadow:0 -9px 28px rgba(15,23,42,.08)}.mobile-bottom a.active{color:var(--ui-primary)}
.ui-role-label{display:inline-flex;align-items:center;gap:6px;padding:6px 9px;border-radius:999px;font-size:10px;font-weight:800;letter-spacing:.08em;background:#eff6ff;color:var(--ui-primary)}
@media(max-width:1100px){.hero-actions{grid-template-columns:1fr 1fr}.hero-actions .primary-action{grid-column:1/-1}.admin-summary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:760px){body{font-size:15px}.content{padding:14px 12px 92px}.topbar{min-height:58px;padding:8px 12px}.topbar>div:first-of-type span,.top-pills>span{display:none}.top-pills> b{padding:6px 8px}.dashboard-hero{min-height:0;padding:22px 17px;border-radius:18px}.dashboard-hero h1{font-size:34px}.hero-actions{grid-template-columns:1fr}.hero-actions .primary-action{grid-column:auto}.hero-score{display:none}.dashboard-pulse,.dash-grid,.subject-grid,.admin-summary-grid,.admin-grid{grid-template-columns:1fr!important}.panel{padding:16px}.dashboard-pulse article{padding:15px}.page-title{align-items:flex-start;gap:12px}.page-title h1{font-size:27px}.page-title>div:last-child{width:100%}.page-title .btn{flex:1}.question-shell{padding:16px}.question-shell h2{font-size:21px}.answer-list label{min-height:56px;padding:10px}.review-footer{align-items:stretch}.review-submit{width:100%}.admin-summary-grid article b{font-size:24px}}
@media(min-width:761px) and (max-width:1100px){.content{padding:24px}.dashboard-hero{padding:34px}.subject-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.admin-grid{grid-template-columns:1fr}.question-shell{max-width:850px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}