:root{--pri:#6366f1;--pri-dk:#4f46e5;--pri-lt:#818cf8;--bg:#f8fafc;--card:#fff;--txt:#1e293b;--mut:#64748b;--bdr:#e2e8f0;--ok:#22c55e;--ok-bg:#f0fdf4;--warn:#f59e0b;--warn-bg:#fffbeb;--bad:#ef4444;--bad-bg:#fef2f2;--r:12px;--shadow:0 1px 3px rgba(0,0,0,.06),0 1px 2px rgba(0,0,0,.04);--shadow-lg:0 10px 25px rgba(0,0,0,.08)}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:var(--bg);color:var(--txt);line-height:1.6;-webkit-font-smoothing:antialiased}
.hid{display:none!important}

/* ── Login ── */
#loginView{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1e1b4b 0%,#312e81 30%,#4338ca 60%,#6366f1 100%);padding:20px}
.login-card{background:#fff;border-radius:20px;box-shadow:0 25px 60px rgba(0,0,0,.3);width:100%;max-width:440px;overflow:hidden;animation:slideUp .6s ease}
.login-brand{background:linear-gradient(135deg,#4338ca,#6366f1);padding:40px 32px 32px;text-align:center;color:#fff}
.logo{width:64px;height:64px;border-radius:16px;background:rgba(255,255,255,.2);backdrop-filter:blur(10px);display:inline-flex;align-items:center;justify-content:center;font-size:1.8rem;font-weight:800;margin-bottom:16px;border:2px solid rgba(255,255,255,.3)}
.login-brand h1{font-size:1.6rem;font-weight:700;letter-spacing:-.02em}
.login-brand p{opacity:.8;font-size:.9rem;margin-top:4px}
.login-form{padding:32px}
@keyframes slideUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}

/* ── Header ── */
header{background:#fff;border-bottom:1px solid var(--bdr);padding:0 24px;position:sticky;top:0;z-index:100;box-shadow:var(--shadow)}
.header-inner{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;height:60px}
.header-left{display:flex;align-items:center;gap:12px}
.header-left h1{font-size:1.1rem;font-weight:700;letter-spacing:-.02em}
.header-left p{font-size:.72rem;color:var(--mut)}
.logo-sm{width:36px;height:36px;border-radius:10px;background:var(--pri);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1rem;font-weight:800}
.header-right{display:flex;align-items:center;gap:12px}
.user-badge{font-size:.82rem;color:var(--mut);padding:4px 12px;background:var(--bg);border-radius:20px}

/* ── Navigation ── */
.tabs{display:flex;gap:0;background:#fff;border-bottom:1px solid var(--bdr);padding:0 24px;overflow-x:auto}
.tab{padding:14px 20px;border:none;background:none;font-size:.88rem;font-weight:500;color:var(--mut);cursor:pointer;border-bottom:2px solid transparent;transition:all .2s;white-space:nowrap}
.tab:hover{color:var(--txt)}
.tab.active{color:var(--pri);border-bottom-color:var(--pri);font-weight:600}

/* ── Progress bar ── */
.pg-bar{height:3px;background:var(--bdr);position:relative;overflow:hidden}
.pg-fill{height:100%;background:linear-gradient(90deg,var(--pri),var(--pri-lt));transition:width .3s;width:0%}
.pg-text{position:absolute;top:8px;left:50%;transform:translateX(-50%);font-size:.78rem;color:var(--mut);white-space:nowrap}

/* ── Main container ── */
.ctn{max-width:1200px;margin:0 auto;padding:24px 24px 60px}

/* ── Forms ── */
label{display:block;font-size:.82rem;font-weight:600;color:var(--mut);margin:12px 0 4px;letter-spacing:.02em;text-transform:uppercase}
input,select{width:100%;padding:11px 14px;border:1px solid var(--bdr);border-radius:10px;font-size:.93rem;background:#fff;transition:all .2s}
input:focus,select:focus{outline:none;border-color:var(--pri);box-shadow:0 0 0 3px rgba(99,102,241,.12)}
.eye-toggle{position:absolute;right:10px;top:50%;transform:translateY(-50%);cursor:pointer;font-size:.75rem;color:var(--mut);user-select:none;padding:2px 6px;border-radius:4px}
.eye-toggle:hover{background:var(--bg)}

/* ── Buttons ── */
.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border:none;border-radius:10px;font-size:.88rem;font-weight:600;cursor:pointer;transition:all .15s}
.btn-p{background:var(--pri);color:#fff}.btn-p:hover{background:var(--pri-dk);transform:translateY(-1px);box-shadow:0 4px 12px rgba(99,102,241,.3)}
.btn-o{background:transparent;border:1px solid var(--bdr);color:var(--txt)}.btn-o:hover{background:var(--bg)}
.btn-ghost{background:none;border:none;color:var(--mut);font-size:.88rem;cursor:pointer;padding:6px 12px;border-radius:8px}.btn-ghost:hover{background:var(--bg);color:var(--txt)}
.btn-lg{width:100%;justify-content:center;padding:14px;font-size:1rem;margin-top:16px}
.btn-s{padding:6px 14px;font-size:.82rem}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}

/* ── Cards ── */
.card{background:var(--card);border-radius:var(--r);padding:24px;margin-bottom:20px;box-shadow:var(--shadow);border:1px solid var(--bdr);transition:box-shadow .2s}
.card:hover{box-shadow:var(--shadow-lg)}
.section-title{font-size:1rem;font-weight:700;margin-bottom:4px;letter-spacing:-.01em}
.section-sub{font-size:.82rem;color:var(--mut);margin-bottom:16px}

/* ── Stat cards ── */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:14px;margin:16px 0}
.stat-card{background:var(--card);border:1px solid var(--bdr);border-radius:var(--r);padding:20px;text-align:center;transform:translateY(8px);opacity:0;animation:fadeUp .4s ease forwards;box-shadow:var(--shadow)}
.stat-card .val{font-size:1.8rem;font-weight:800;background:linear-gradient(135deg,var(--pri),var(--pri-lt));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.stat-card .lbl{font-size:.75rem;color:var(--mut);margin-top:4px;text-transform:uppercase;letter-spacing:.04em;font-weight:600}
@keyframes fadeUp{to{transform:translateY(0);opacity:1}}
.stat-card:nth-child(1){animation-delay:0s}.stat-card:nth-child(2){animation-delay:.06s}.stat-card:nth-child(3){animation-delay:.12s}.stat-card:nth-child(4){animation-delay:.18s}.stat-card:nth-child(5){animation-delay:.24s}.stat-card:nth-child(6){animation-delay:.3s}.stat-card:nth-child(7){animation-delay:.36s}.stat-card:nth-child(8){animation-delay:.42s}

/* ── Course cards ── */
.year-group{margin-bottom:28px}
.year-label{font-size:.78rem;font-weight:700;color:var(--pri);text-transform:uppercase;letter-spacing:.08em;margin-bottom:10px;padding-left:4px}
.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}
.course-card{background:var(--card);border:1px solid var(--bdr);border-radius:var(--r);padding:18px;cursor:pointer;transition:all .2s;box-shadow:var(--shadow);position:relative;overflow:hidden;opacity:0;animation:fadeUp .4s ease forwards}
.course-card:hover{border-color:var(--pri);box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.course-card .c-name{font-size:.9rem;font-weight:600;margin-bottom:8px;line-height:1.3}
.course-card .c-code{font-size:.72rem;color:var(--mut);margin-bottom:10px}
.course-card .c-stats{display:flex;gap:16px;font-size:.78rem;color:var(--mut)}
.course-card .c-stats strong{color:var(--txt)}
.course-card .c-bar{height:4px;background:var(--bdr);border-radius:2px;margin-top:10px;overflow:hidden}
.course-card .c-bar-fill{height:100%;border-radius:2px;transition:width 1s cubic-bezier(.25,.8,.25,1);width:0}

/* ── Donut chart ── */
.donut-wrap{display:flex;justify-content:center;align-items:center;gap:32px;margin:20px 0;flex-wrap:wrap}
.donut-center{font-size:1.4rem;font-weight:800;fill:var(--txt)}
.donut-sub{font-size:.55rem;fill:var(--mut)}
.donut-legend{font-size:.85rem;line-height:2.2}
.donut-legend span{display:inline-block;width:12px;height:12px;border-radius:3px;margin-right:8px;vertical-align:middle}

/* ── Bars ── */
.bar-row{display:flex;align-items:center;gap:10px;margin:5px 0;opacity:0;animation:fadeUp .4s ease forwards}
.bar-row .bar-label{width:180px;font-size:.82rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex-shrink:0}
.bar-row .bar-track{flex:1;background:var(--bg);border-radius:6px;height:28px;overflow:hidden}
.bar-row .bar-fill{height:100%;border-radius:6px;transition:width 1s cubic-bezier(.25,.8,.25,1);width:0;display:flex;align-items:center;padding:0 10px;font-size:.72rem;font-weight:600;color:#fff}
.bar-row .bar-val{width:55px;font-size:.85rem;font-weight:700;text-align:right;flex-shrink:0}

/* ── Heatmap ── */
.heatmap-wrap{overflow-x:auto;margin:16px 0;border-radius:var(--r);border:1px solid var(--bdr)}
.heatmap{border-collapse:separate;border-spacing:2px;font-size:.7rem;margin:4px}
.heatmap th{padding:5px 6px;font-size:.66rem;background:transparent;border:none;color:var(--mut);font-weight:600}
.heatmap td{width:28px;height:28px;text-align:center;border-radius:5px;font-weight:600;font-size:.7rem;border:none;transition:transform .15s}
.heatmap td:hover{transform:scale(1.25);z-index:1}
.hm-g{background:#dcfce7;color:#166534}.hm-r{background:#fecaca;color:#991b1b}.hm-y{background:#fef9c3;color:#854d0e}.hm-n{background:#f8fafc;color:#cbd5e0}

/* ── Scatter plot ── */
.chart-wrap{background:var(--card);border:1px solid var(--bdr);border-radius:var(--r);padding:16px;margin:16px 0}

/* ── SVG animations ── */
.trend-line{fill:none;stroke-width:2.5;stroke-linecap:round;stroke-linejoin:round;opacity:0;animation:fadeIn .6s ease forwards}
.trend-dot{opacity:0;animation:fadeIn .3s ease forwards}
.trend-label{font-size:.65rem;fill:var(--mut);font-family:inherit}
.trend-grid{stroke:var(--bdr);stroke-width:1}
@keyframes fadeIn{to{opacity:1}}

/* ── Risk cards ── */
.risk-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:12px;margin:12px 0}
.risk-card{border-radius:var(--r);padding:16px;border-left:4px solid;font-size:.88rem;box-shadow:var(--shadow);opacity:0;animation:fadeUp .3s ease forwards}
.risk-high{background:var(--bad-bg);border-color:var(--bad)}
.risk-med{background:var(--warn-bg);border-color:var(--warn)}
.risk-low{background:var(--ok-bg);border-color:var(--ok)}
.risk-card .risk-name{font-weight:700;margin-bottom:4px}
.risk-card .risk-flags{display:flex;gap:6px;flex-wrap:wrap;margin-top:6px}
.risk-flag{padding:2px 8px;border-radius:10px;font-size:.72rem;font-weight:600;background:rgba(0,0,0,.06)}

/* ── Tables ── */
table{width:100%;border-collapse:collapse;font-size:.88rem}
th{background:var(--bg);padding:11px 10px;text-align:left;font-weight:600;font-size:.76rem;text-transform:uppercase;letter-spacing:.04em;color:var(--mut);border-bottom:2px solid var(--bdr);white-space:nowrap}
td{padding:11px 10px;border-bottom:1px solid var(--bdr)}
tr:hover td{background:#fafbfc}
.sh{color:var(--ok);font-weight:700}.sm2{color:var(--warn);font-weight:700}.sl{color:var(--bad);font-weight:700}

/* ── Status messages ── */
.sm{padding:10px 14px;border-radius:10px;margin:10px 0;font-size:.88rem}
.sm-ok{background:var(--ok-bg);color:#166534;border:1px solid #bbf7d0}
.sm-er{background:var(--bad-bg);color:#991b1b;border:1px solid #fecaca}
.sm-in{background:#eff6ff;color:#1e40af;border:1px solid #bfdbfe}

/* ── Modal ── */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.4);backdrop-filter:blur(4px);z-index:200;display:flex;align-items:center;justify-content:center;padding:20px}
.modal{background:#fff;border-radius:16px;padding:28px;width:100%;max-width:520px;max-height:90vh;overflow-y:auto;box-shadow:0 25px 60px rgba(0,0,0,.2)}
.settings-section{background:var(--bg);border-radius:var(--r);padding:16px;margin-top:8px}
.code-block{display:block;background:var(--card);padding:10px 44px 10px 12px;border-radius:8px;font-size:.72rem;word-break:break-all;line-height:1.5;border:1px solid var(--bdr)}
.copy-btn{position:absolute;top:8px;right:8px;padding:3px 10px;border:1px solid var(--bdr);border-radius:6px;background:#fff;font-size:.72rem;cursor:pointer}
.presets{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0}
.presets button{padding:5px 14px;border:1px solid var(--bdr);border-radius:20px;background:#fff;font-size:.8rem;cursor:pointer;transition:all .2s}
.presets button:hover{border-color:var(--pri);color:var(--pri);background:var(--bg)}

/* ── Misc ── */
.help-text{font-size:.78rem;color:var(--mut);margin-top:6px;line-height:1.5}
.help-text a{color:var(--pri)}
.badge{display:inline-block;padding:3px 10px;border-radius:10px;font-size:.72rem;font-weight:600}
.b-easy{background:#dcfce7;color:#166534}.b-med{background:#fef9c3;color:#854d0e}.b-hard{background:#fecaca;color:#991b1b}.b-vhard{background:#ef4444;color:#fff}
.acts{display:flex;gap:12px;margin-top:20px;flex-wrap:wrap}
.mut{color:var(--mut);font-weight:400}

/* ── Q review cards ── */
.q-card{border:1px solid var(--bdr);border-radius:var(--r);padding:18px;margin:12px 0;box-shadow:var(--shadow)}
.q-card h4{font-size:.95rem;margin-bottom:4px}
.q-options{padding-left:20px;margin:8px 0;font-size:.88rem}
.q-options li{padding:3px 0}
.q-flaws{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0}
.flaw-tag{padding:3px 10px;border-radius:10px;font-size:.74rem;background:#fecaca;color:#991b1b;font-weight:600}
.ai-feedback{background:var(--bg);border-radius:8px;padding:14px;margin-top:10px;font-size:.88rem;border-left:3px solid var(--pri)}
.ai-box{background:var(--bg);border-radius:var(--r);padding:18px;margin-top:8px;font-size:.9rem;line-height:1.7;border-left:3px solid var(--pri)}
.ai-box p{margin-bottom:8px}

/* ── Mode toggle ── */
.mode-toggle{display:flex;gap:0;margin-bottom:16px}
.mode-btn{flex:1;padding:12px;border:1px solid var(--bdr);background:#fff;cursor:pointer;text-align:center;font-weight:600;font-size:.85rem;transition:all .2s}
.mode-btn:first-child{border-radius:10px 0 0 10px}
.mode-btn:last-child{border-radius:0 10px 10px 0}
.mode-btn:not(:first-child):not(:last-child){border-radius:0}
.mode-btn.active{background:var(--pri);color:#fff;border-color:var(--pri)}

/* ── Wellbeing indicators ── */
.wellbeing-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px;margin:12px 0}
.wb-card{background:var(--card);border:1px solid var(--bdr);border-radius:var(--r);padding:16px;text-align:center;box-shadow:var(--shadow)}
.wb-card .wb-ring{position:relative;display:inline-block;margin-bottom:8px}
.wb-card .wb-val{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:1.1rem;font-weight:700}
.wb-card .wb-label{font-size:.78rem;color:var(--mut);font-weight:600;text-transform:uppercase;letter-spacing:.04em}

/* ── Responsive ── */
@media(max-width:700px){
  .course-grid{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .header-inner{padding:0 8px}
  .ctn{padding:16px 12px 40px}
  .bar-row .bar-label{width:100px;font-size:.75rem}
}

/* ── Progress bar for course cards ── */
.pgc{background:var(--bdr);border-radius:8px;height:8px;overflow:hidden;margin:12px 0}
.pgf{height:100%;background:var(--pri);border-radius:8px;transition:width .3s;width:0%}