:root{
  --bg:#f7f8fb; --card:#fff; --text:#1c2536; --muted:#697586;
  --primary:#6c5ce7; --primary-d:#5b4bd1; --accent:#22c55e; --border:#edeff3;
  --poor:#ef4444; --satisfying:#f59e0b; --good:#ca8a04; --verygood:#22c55e; --excellent:#16a34a;
  --shadow:0 2px 10px rgba(28,37,54,.05);
}
*{box-sizing:border-box}
body{margin:0;font-family:'Segoe UI',Roboto,Arial,sans-serif;background:var(--bg);color:var(--text)}
a{color:var(--primary);text-decoration:none}
h1{margin:0 0 6px;font-weight:800;letter-spacing:-.5px}
h2{margin:0 0 16px;font-size:1.1rem}
.muted{color:var(--muted)}
.muted.small{font-size:.85rem}
.back{display:inline-block;margin-bottom:14px;font-size:.9rem;font-weight:600}

.brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:1.15rem;padding:26px 0}
.brand-dot{width:12px;height:12px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent))}
.brand-accent{color:var(--primary)}
.center-brand{justify-content:center}

/* ---------- Student hero pages ---------- */
.hero{min-height:100vh;background:
  radial-gradient(circle at 12% 20%, #fde68a33, transparent 40%),
  radial-gradient(circle at 90% 10%, #a78bfa33, transparent 40%),
  radial-gradient(circle at 80% 80%, #6ee7b733, transparent 40%),
  var(--bg)}
.wrap{max-width:960px;margin:0 auto;padding:0 20px 70px;text-align:center}
.wrap.narrow{max-width:640px;text-align:left}
.wrap.center{text-align:center}
.eyebrow{color:var(--primary);font-weight:700;letter-spacing:1.5px;font-size:.75rem;margin:10px 0}
.hero h1{font-size:2.4rem;line-height:1.15}
.accent-text{background:linear-gradient(90deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{max-width:520px;margin:14px auto 34px;font-size:1.05rem}
.wrap.narrow .lead{margin:14px 0 30px}

.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:18px;margin-top:10px;text-align:left}
.sections-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
.section-card{text-align:center;display:flex;flex-direction:column;align-items:center;gap:10px}
.teacher-card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:22px;transition:.15s;box-shadow:var(--shadow)}
.teacher-card:hover{transform:translateY(-4px);box-shadow:0 10px 24px rgba(108,92,231,.15);border-color:var(--primary)}
.teacher-card h3{margin:14px 0 2px}
.teacher-card p{margin:0 0 16px;color:var(--muted)}
.section-card h3{margin:0}

.subject-list{display:flex;flex-direction:column;gap:12px}
.subject-row{display:flex;justify-content:space-between;align-items:center;gap:14px;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:16px 18px;box-shadow:var(--shadow);transition:.15s}
.subject-row:hover{border-color:var(--primary);transform:translateY(-2px)}
.subject-info{display:flex;flex-direction:column;gap:3px}
.subj-code{display:inline-block;background:#f2f0ff;color:var(--primary);font-weight:700;font-size:.72rem;letter-spacing:.4px;padding:2px 8px;border-radius:6px;width:fit-content}
.subj-name{font-weight:600}
.subj-teacher{color:var(--muted);font-size:.85rem}

.avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--primary),#a78bfa);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.avatar.big{width:56px;height:56px;font-size:1.3rem}
.survey-head{display:flex;align-items:center;gap:16px;margin-bottom:26px}
.check-badge{width:60px;height:60px;border-radius:50%;background:#dcfce7;color:var(--excellent);font-size:1.8rem;display:flex;align-items:center;justify-content:center;margin:0 auto 16px}

.btn{display:inline-block;background:var(--primary);color:#fff!important;padding:10px 20px;border-radius:10px;border:none;cursor:pointer;font-size:.95rem;font-weight:600;transition:.15s}
.btn:hover{background:var(--primary-d)}
.btn.ghost{background:#fff;color:var(--primary)!important;border:1px solid var(--border);box-shadow:var(--shadow)}
.btn.small{padding:6px 14px;font-size:.82rem}
.submit-btn{width:100%;padding:14px;font-size:1.05rem;margin-top:8px;border-radius:12px}

.q-block{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:20px 22px;margin-bottom:16px;box-shadow:var(--shadow)}
.q-text{font-weight:600;margin:0 0 14px}
.rating{display:flex;gap:8px;flex-wrap:wrap}
.r-opt{position:relative;display:flex;flex-direction:column;align-items:center;gap:2px;cursor:pointer;padding:10px;border:2px solid var(--border);border-radius:12px;transition:.15s;min-width:78px}
.r-opt input{position:absolute;opacity:0;pointer-events:none}
.r-star{font-size:1.3rem;color:#d1d5db}
.r-label{font-size:.72rem;color:var(--muted)}
.r-opt:hover{border-color:var(--primary)}
.r-opt:has(input:checked){border-color:var(--primary);background:#f2f0ff}
.r-opt:has(input:checked) .r-star{color:var(--primary)}
.r-opt:has(input:checked) .r-label{color:var(--primary);font-weight:600}
.r-opt.checked{border-color:var(--primary);background:#f2f0ff}
.r-opt.checked .r-star{color:var(--primary)}
.r-opt.checked .r-label{color:var(--primary);font-weight:600}

textarea{width:100%;padding:12px;border:1px solid var(--border);border-radius:10px;font-family:inherit;resize:vertical}
.admin-link{margin-top:30px;font-size:.85rem}

/* ---------- Auth screen ---------- */
.auth-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg)}
.auth-card{background:var(--card);border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow);padding:36px 34px;width:100%;max-width:380px;text-align:center}
.login-form{display:flex;flex-direction:column;gap:10px;margin:20px 0}
.login-form input{padding:12px;border:1px solid var(--border);border-radius:10px;font-size:1rem}
.err{color:var(--poor);font-weight:600}

/* ---------- Admin dashboard shell ---------- */
.admin-body{background:var(--bg)}
.shell{display:flex;min-height:100vh}
.sidebar{width:220px;background:#171623;color:#fff;display:flex;flex-direction:column;padding:22px 16px;flex-shrink:0}
.sidebar .brand{color:#fff;padding:6px 8px 26px}
.side-nav{display:flex;flex-direction:column;gap:4px;flex:1}
.side-nav a{color:#c7c9d9;padding:10px 12px;border-radius:10px;font-size:.92rem;font-weight:500;display:flex;align-items:center;gap:10px}
.side-nav a:hover{background:#242236;color:#fff}
.side-nav a.active{background:var(--primary);color:#fff}
.ic{display:inline-block;width:18px;text-align:center}
.logout-link{color:#c7c9d9;padding:10px 12px;font-size:.9rem;display:flex;align-items:center;gap:10px}
.logout-link:hover{color:#fff}

.main-area{flex:1;padding:30px 34px 60px;max-width:1180px}
.topbar{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:14px;margin-bottom:24px}

.kpi-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:16px;margin-bottom:28px}
.kpi-card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:20px;display:flex;align-items:center;gap:14px;box-shadow:var(--shadow)}
.kpi-icon{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.2rem;color:#fff;flex-shrink:0}
.kpi-a{background:linear-gradient(135deg,#6c5ce7,#a78bfa)}
.kpi-b{background:linear-gradient(135deg,#22c55e,#4ade80)}
.kpi-c{background:linear-gradient(135deg,#f59e0b,#fbbf24)}
.kpi-d{background:linear-gradient(135deg,#ef4444,#f87171)}
.kpi-card .num{display:block;font-size:1.4rem;font-weight:800}
.kpi-card .lbl{display:block;font-size:.78rem;color:var(--muted)}

.panel{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:22px;box-shadow:var(--shadow);margin-bottom:24px}
.table-scroll{overflow-x:auto}
.report-table{width:100%;border-collapse:collapse;min-width:720px}
.report-table th,.report-table td{padding:11px 12px;text-align:center;border-bottom:1px solid var(--border);font-size:.88rem}
.report-table th{font-size:.72rem;text-transform:uppercase;color:var(--muted);letter-spacing:.4px}
.report-table td:first-child,.report-table th:first-child{text-align:left}
.tname{font-weight:600}

.pill{display:inline-block;min-width:26px;padding:3px 9px;border-radius:999px;font-weight:700;font-size:.8rem}
.pill-poor{background:#fee2e2;color:var(--poor)}
.pill-satisfying{background:#fef3c7;color:#b45309}
.pill-good{background:#fef9c3;color:var(--good)}
.pill-verygood{background:#dcfce7;color:#15803d}
.pill-excellent{background:#d1fae5;color:var(--excellent)}

.note-list{list-style:none;padding:0;display:flex;flex-direction:column;gap:10px;margin:0}
.note-list li{background:#faf9ff;border:1px solid var(--border);border-left:4px solid var(--primary);border-radius:10px;padding:12px 14px}
.note-date{display:block;font-size:.75rem;color:var(--muted);margin-bottom:4px}

@media(max-width:820px){
  .shell{flex-direction:column}
  .sidebar{width:100%;flex-direction:row;align-items:center;padding:14px 16px}
  .sidebar .brand{padding:0;margin-right:auto}
  .side-nav{flex-direction:row}
  .side-nav a span.ic{display:none}
  .logout-link{display:none}
  .main-area{padding:22px 18px 50px}
}
@media(max-width:600px){.rating{gap:6px}.r-opt{min-width:64px;padding:8px}.hero h1{font-size:1.8rem}}