:root {
    color-scheme: dark;
    --bg: #090d14;
    --panel: #111722;
    --panel2: #171f2c;
    --border: #263246;
    --text: #f3f6fb;
    --muted: #98a6bb;
    --accent: #6ea8fe;
    --danger: #ff7d86;
    --warning: #ffcc66;
    --success: #7ee2a8;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    background: radial-gradient(circle at top, #121a28 0, var(--bg) 42%);
    color: var(--text);
    font: 16px/1.45 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
button, input, select { font: inherit; }
button { cursor: pointer; }
a { color: inherit; }
.shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; padding: 44px 0 60px; }
.topbar, .panel-heading { display:flex; align-items:flex-start; justify-content:space-between; gap:24px; }
.eyebrow { margin:0 0 8px; color:var(--accent); font-size:.72rem; font-weight:800; letter-spacing:.16em; }
h1, h2 { margin:0; letter-spacing:-.03em; }
h1 { font-size:clamp(2rem, 5vw, 3.4rem); }
h2 { font-size:1.4rem; }
.sub { color:var(--muted); max-width:680px; margin:10px 0 0; }
.button {
    border:1px solid var(--border); border-radius:12px; padding:10px 14px; min-height:44px;
    background:var(--accent); color:#08101c; font-weight:750;
}
.button.secondary { background:var(--panel2); color:var(--text); }
.button.ghost { background:transparent; color:var(--text); }
.button.danger { background:transparent; color:var(--danger); border-color:#5b3038; }
.notice { margin:22px 0; padding:14px 16px; border:1px solid var(--border); border-radius:14px; background:var(--panel); color:var(--muted); }
.notice.warning { color:var(--warning); border-color:#5b4a22; }
.stats { display:grid; grid-template-columns:repeat(4,1fr); gap:12px; margin:30px 0 18px; }
.stats article { padding:18px; border:1px solid var(--border); background:rgba(17,23,34,.9); border-radius:16px; }
.stats span { display:block; font-size:1.8rem; font-weight:800; }
.stats small { color:var(--muted); }
.toolbar { display:grid; grid-template-columns:minmax(220px,1fr) auto auto auto; gap:10px; margin-bottom:18px; }
input, select {
    width:100%; min-height:44px; border:1px solid var(--border); border-radius:12px;
    background:var(--panel); color:var(--text); padding:10px 12px; outline:none;
}
input:focus, select:focus, button:focus-visible { outline:2px solid var(--accent); outline-offset:2px; }
.assignment-list { display:grid; gap:10px; }
.assignment {
    display:grid; grid-template-columns:minmax(0,1fr) auto; gap:18px; align-items:center;
    border:1px solid var(--border); border-radius:16px; background:var(--panel); padding:18px;
}
.assignment.overdue { border-color:#5d3439; }
.assignment.forced { border-color:#3b567d; }
.course { color:var(--accent); font-size:.78rem; font-weight:800; text-transform:uppercase; letter-spacing:.06em; margin-bottom:4px; }
.assignment h3 { margin:0; font-size:1.04rem; }
.meta { display:flex; gap:10px; flex-wrap:wrap; color:var(--muted); margin-top:8px; font-size:.88rem; }
.pill { padding:3px 8px; border:1px solid var(--border); border-radius:999px; }
.pill.overdue { color:var(--danger); border-color:#5d3439; }
.pill.soon { color:var(--warning); border-color:#5b4a22; }
.pill.forced { color:var(--accent); border-color:#3b567d; }
.actions { display:flex; gap:8px; flex-wrap:wrap; justify-content:flex-end; }
.actions a, .actions button { white-space:nowrap; }
.empty { text-align:center; color:var(--muted); padding:48px 20px; border:1px dashed var(--border); border-radius:16px; }
.hidden-panel { margin-top:28px; border-top:1px solid var(--border); padding-top:24px; }
footer { color:var(--muted); font-size:.82rem; margin-top:24px; }
.sr-only { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }
@media (max-width: 800px) {
    .stats { grid-template-columns:repeat(2,1fr); }
    .toolbar { grid-template-columns:1fr 1fr; }
    .search-wrap { grid-column:1/-1; }
    .assignment { grid-template-columns:1fr; }
    .actions { justify-content:flex-start; }
}
@media (max-width: 520px) {
    .shell { width:min(100% - 20px,1180px); padding-top:24px; }
    .topbar, .panel-heading { flex-direction:column; }
    .toolbar { grid-template-columns:1fr; }
    .search-wrap { grid-column:auto; }
}