:root{--text:#1f2933;--muted:#616e7c;--border:#cbd2d9;--background:#f5f7fa;--card:#fff;--primary:#2f6f62;--primary-text:#fff;--danger:#b42318;color:var(--text);background:var(--background);font-family:system-ui,sans-serif;font-size:16px}body{margin:0}main{box-sizing:border-box;max-width:720px;margin:0 auto;padding:16px}h1,h2,h3,p{margin:0}h1{font-size:24px}h2{font-size:20px}h3{font-size:17px}.stack{flex-direction:column;gap:16px;display:flex}.topbar{justify-content:space-between;align-items:center;gap:16px;display:flex}.card{border:1px solid var(--border);background:var(--card);border-radius:12px;padding:16px}.habit-text{text-align:right;flex-direction:column;gap:4px;display:flex}.muted{color:var(--muted);font-size:14px}.error{color:var(--danger)}.field{color:var(--muted);border:0;flex-direction:column;gap:6px;margin:0;padding:0;font-size:14px;display:flex}.field legend{margin-bottom:6px;padding:0}.choice{min-height:44px;color:var(--text);align-items:center;gap:8px;font-size:16px;display:flex}.choice input{width:20px;height:20px;margin:0}input:not([type=radio]),textarea,select{box-sizing:border-box;border:1px solid var(--border);background:var(--card);width:100%;min-height:44px;color:var(--text);font:inherit;border-radius:8px;padding:8px 12px;font-size:16px}.actions{flex-wrap:wrap;gap:8px;display:flex}button{border:1px solid var(--primary);background:var(--primary);min-height:44px;color:var(--primary-text);font:inherit;cursor:pointer;border-radius:8px;padding:0 16px;font-weight:600}button:disabled{opacity:.5;cursor:default}button.secondary{background:var(--card);color:var(--primary)}a.button{box-sizing:border-box;border:1px solid var(--primary);background:var(--card);min-height:44px;color:var(--primary);border-radius:8px;align-items:center;padding:0 16px;font-weight:600;text-decoration:none;display:inline-flex}button.danger{border-color:var(--danger);background:var(--danger);color:var(--primary-text)}button.secondary.danger{background:var(--card);color:var(--danger)}button.link{min-height:44px;color:var(--primary);background:0 0;border:0;padding:0;font-weight:400}.success{color:var(--primary)}.badge{background:var(--background);color:var(--muted);border-radius:999px;align-self:flex-start;padding:2px 10px;font-size:14px}.badge.ok{color:var(--primary);background:#e3f1ed}.course-picker{flex-wrap:wrap;align-items:flex-end;gap:8px;display:flex}.course-picker .field{flex:200px}.tabs{border-bottom:1px solid var(--border);gap:4px;display:flex}button.tab{color:var(--muted);background:0 0;border:0;border-bottom:3px solid #0000;border-radius:0;flex:1;padding:0 8px}button.tab.active{border-bottom-color:var(--primary);color:var(--primary)}.preview{margin:0;padding-inline-start:20px;font-size:14px}.preview .ok{color:var(--primary)}.preview .error{color:var(--danger)}.card.compact{gap:8px;padding:12px 16px}button.small{align-self:flex-start;min-height:36px;padding:0 12px;font-size:14px}