:root{--bg: #0f1720;--surface: #18222e;--surface2: #1f2c3a;--text: #e8eef5;--muted: #9db8d4;--border: #2a3a4a;--primary: #5b8db8;--primary-text: #ffffff;--error: #e57373;--ok: #5bb88d}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text)}.brand{color:var(--primary);margin:0;font-size:1.4rem}.muted{color:var(--muted)}.error{color:var(--error);margin:.5rem 0 0}.center{min-height:100vh;display:grid;place-items:center}.row{display:flex;gap:.6rem;align-items:center}.btn{background:var(--surface2);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:.55rem .9rem;cursor:pointer;font-size:.95rem}.btn:hover{border-color:var(--primary)}.btn.primary{background:var(--primary);color:var(--primary-text);border-color:var(--primary)}.btn.small{padding:.35rem .7rem;font-size:.85rem}.btn:disabled{opacity:.6;cursor:default}.link{background:none;border:none;color:var(--primary);cursor:pointer;padding:0;font:inherit}input,select{background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:.55rem .7rem;font-size:.95rem;width:100%}label{display:block;margin:.75rem 0 0;font-size:.9rem;color:var(--muted)}label input,label select{margin-top:.3rem}label.inline{display:flex;gap:.5rem;align-items:center}label.inline select{width:auto}.card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:1.25rem;margin:1rem 0}.card h2{margin:0 0 .75rem;font-size:1.1rem}.auth-wrap{min-height:100vh;display:grid;place-items:center;padding:1rem}.auth-card{width:100%;max-width:380px}.auth-card .btn.primary{width:100%;margin-top:1rem}.switch{margin-top:1rem;font-size:.9rem;color:var(--muted)}.dash{max-width:960px;margin:0 auto;padding:1rem}.topbar{display:flex;align-items:center;justify-content:space-between;padding-bottom:1rem;border-bottom:1px solid var(--border)}.grid{display:grid;gap:1rem;grid-template-columns:1fr}@media (min-width: 720px){.grid{grid-template-columns:1fr 1fr}}.balance{font-size:2rem;font-weight:700;margin:.25rem 0 .75rem}.banner{background:var(--surface2);border:1px solid var(--primary);border-radius:10px;padding:.6rem .9rem;margin:1rem 0}.list{list-style:none;padding:0;margin:0 0 .75rem}.list li{padding:.4rem 0;border-bottom:1px solid var(--border)}.addform{display:grid;gap:.5rem;grid-template-columns:1fr 1fr}.addform button{grid-column:1 / -1}.sessions{width:100%;border-collapse:collapse;font-size:.92rem}.sessions th,.sessions td{text-align:left;padding:.55rem .5rem;border-bottom:1px solid var(--border)}.sessions th{color:var(--muted);font-weight:600}