:root{font-family:Inter,ui-sans-serif,system-ui,sans-serif;color:#10233f;background:#f4f8fd;--ink:#10233f;--muted:#66778d;--line:#dbe6f2;--paper:#fff;--blue:#123e7c;--sky:#dceeff;--ice:#f4f8fd;--danger:#b63c45}*{box-sizing:border-box}[hidden]{display:none!important}body{margin:0;min-height:100vh}button,input,select,textarea{font:inherit}button{border:0;border-radius:10px;padding:11px 16px;background:var(--blue);color:#fff;font-weight:750;cursor:pointer}button:hover{filter:brightness(.97)}input,select,textarea{width:100%;border:1px solid var(--line);border-radius:10px;background:#fff;padding:11px 12px;color:var(--ink)}label{display:grid;gap:7px;font-size:13px;font-weight:700}.muted,.notice{color:var(--muted)}.eyebrow{margin:0 0 6px;color:#5d7fa8;font-size:11px;font-weight:850;letter-spacing:.16em}.brand-mark{display:grid;place-items:center;width:54px;height:54px;border-radius:16px;background:#bfe0ff;color:var(--blue);font-size:28px;font-weight:900}.brand-mark.small{width:38px;height:38px;border-radius:11px;font-size:19px}#loginShell{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at 75% 20%,#d9ebff,transparent 35%),var(--ice)}.auth-card{width:min(430px,100%);padding:42px;background:var(--paper);border:1px solid var(--line);border-radius:24px;box-shadow:0 24px 70px #173c681c}.auth-card h1{font-size:36px;margin:24px 0 8px}.stack{display:grid;gap:17px;margin-top:28px}#notice{min-height:22px;font-weight:700}.app-layout{min-height:100vh;display:grid;grid-template-columns:250px 1fr}.sidebar{position:sticky;top:0;height:100vh;padding:24px 18px;background:linear-gradient(180deg,#123e7c,#102f5d);color:#fff;display:flex;flex-direction:column}.brand{display:flex;gap:12px;align-items:center;padding:0 8px 28px}.brand div{display:grid}.brand small{color:#b7d1ee}nav{display:grid;gap:5px}nav button{background:transparent;text-align:left;color:#d9e9fa;font-weight:650}nav button.active{background:#bfe0ff;color:#123e7c}#sessionPanel{margin-top:auto;border-top:1px solid #ffffff22;padding:18px 8px 0;display:grid;gap:12px;font-size:12px;overflow-wrap:anywhere}.ghost{background:transparent;color:inherit;border:1px solid currentColor}.workspace{padding:34px 42px;min-width:0;background:var(--ice)}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.topbar h1{font-size:34px;margin:0}.notice{min-height:24px;font-weight:700}.page{display:none}.page.active{display:block}.hero{background:linear-gradient(135deg,#fff,#eaf4ff);border:1px solid var(--line);border-radius:22px;padding:42px;margin:20px 0}.hero h2{font-size:42px;max-width:700px;margin:12px 0}.hero p:last-child{font-size:18px;max-width:650px;color:#5f7086}.list-toolbar{display:grid;grid-template-columns:1fr 190px;gap:12px;margin:20px 0}.cards{display:grid;gap:10px}.cards article{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;display:grid;grid-template-columns:minmax(180px,1.6fr) repeat(2,minmax(120px,1fr)) auto;gap:18px;align-items:center;cursor:pointer}.cards article:hover{border-color:#8eb9e5;box-shadow:0 8px 25px #173c6812}.cards h3{margin:0 0 4px}.cards p{margin:0;color:var(--muted);font-size:13px}.badge{display:inline-flex;width:max-content;padding:5px 9px;border-radius:99px;background:#dceeff;color:#17538d;font-size:12px;font-weight:800}.badge.inactive{background:#eceff3;color:#68717c}.placeholder{background:#fff;border:1px dashed #a9bfd8;border-radius:18px;padding:36px;margin-top:20px}.week-wireframe{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin-top:24px}.week-wireframe span{min-height:110px;padding:12px;background:#f1f7ff;border:1px solid #d5e7fa;border-radius:12px}.week-wireframe b{display:block;margin-top:18px;padding:8px;background:#cfe7ff;border-radius:8px;font-size:12px}dialog{width:min(860px,calc(100% - 32px));border:0;border-radius:20px;padding:0;box-shadow:0 28px 90px #10233f55}dialog::backdrop{background:#10233f99}dialog form{padding:26px}dialog header,dialog footer{display:flex;align-items:center;gap:12px}dialog header{justify-content:space-between;margin-bottom:22px}dialog h2{margin:0;font-size:28px}.icon-button{background:transparent;color:var(--ink);font-size:28px;padding:4px 10px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.form-grid .wide{grid-column:1/-1}dialog footer{margin-top:26px}dialog footer span{flex:1}.danger{color:var(--danger)}.schedule-editor,.student-card{grid-column:1/-1;border-top:1px solid var(--line);margin-top:8px;padding-top:18px}.schedule-row{display:grid;grid-template-columns:1fr 1fr 1fr 1fr auto;gap:8px;margin:8px 0}.subscription-card{background:#f7fbff;border:1px solid #dbeaf8;border-radius:14px;padding:16px;margin-top:12px}.subscription-meta{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.event-history{display:flex;flex-wrap:wrap;gap:7px;margin-top:12px}.event-history span{padding:6px 9px;border-radius:8px;background:#e3f1ff;font-size:12px}@media(max-width:800px){.app-layout{grid-template-columns:1fr}.sidebar{position:static;height:auto}.sidebar nav{grid-template-columns:repeat(2,1fr)}.workspace{padding:24px}.cards article,.schedule-row{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.form-grid .wide{grid-column:auto}.hero h2{font-size:32px}.week-wireframe{grid-template-columns:1fr}.subscription-meta{grid-template-columns:1fr 1fr}}