:root{--bg:#fff;--bg-elevated:#f7f8fa;--text:#1f2430;--text-dim:#6b7280;--accent:#3b82f6;--border:#e5e7eb}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:system-ui,-apple-system,Segoe UI,sans-serif}.layout{min-height:100vh;display:flex}.sidebar{background:var(--bg-elevated);border-right:1px solid var(--border);width:220px;padding:24px 16px}.sidebar-brand{margin-bottom:24px;font-size:1.1rem;font-weight:700}.sidebar-nav{flex-direction:column;gap:4px;display:flex}.sidebar-link{color:var(--text-dim);cursor:pointer;border-radius:8px;padding:10px 12px;font-size:.95rem;text-decoration:none;display:block}.sidebar-link:hover{color:var(--text);background:#0000000a}.sidebar-link.active{background:var(--accent);color:#fff}.sidebar-group{position:relative}.sidebar-submenu{flex-direction:column;padding-left:12px;display:none}.sidebar-group:hover .sidebar-submenu{display:flex}.content{flex:1;padding:32px 40px}.inline-form{flex-wrap:wrap;gap:8px;margin-bottom:24px;display:flex}.inline-form input,.inline-form select{background:var(--bg);border:1px solid var(--border);color:var(--text);border-radius:6px;padding:8px 10px}.inline-form button{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:6px;padding:8px 16px;font-weight:600}.data-table{border-collapse:collapse;width:100%}.data-table th{text-align:left;color:var(--text-dim);text-transform:uppercase;border-bottom:1px solid var(--border);padding:10px 12px;font-size:.8rem}.data-table td{border-bottom:1px solid var(--border);padding:12px}.table-link{color:var(--accent);font-weight:600;text-decoration:none}.table-link:hover{text-decoration:underline}.page-header{justify-content:space-between;align-items:center;margin-bottom:24px;display:flex}.primary-button{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:6px;padding:10px 18px;font-weight:600}.top-row{justify-content:space-between;align-items:flex-start;gap:24px;margin-bottom:32px;display:flex}.payment-card{border:1px solid var(--border);border-radius:8px;flex-direction:column;flex-shrink:0;gap:8px;width:280px;padding:16px;display:flex}.payment-card input{background:var(--bg);border:1px solid var(--border);color:var(--text);border-radius:6px;padding:8px 10px}.computed-hours{color:var(--text-dim);padding:8px 4px;font-size:.9rem}.hint-text{color:var(--text-dim);margin-bottom:12px;font-size:.9rem}.calendar-actions{gap:8px;margin:16px 0;display:flex}a.secondary-button{text-decoration:none;display:inline-block}.calendar-page{margin-bottom:32px}.calendar-table{border-collapse:collapse;table-layout:fixed;width:100%}.calendar-table th{background:var(--bg-elevated);text-transform:uppercase;color:var(--text-dim);border:1px solid var(--border);padding:8px;font-size:.8rem}.calendar-table td{border:1px solid var(--border);vertical-align:top;height:70px;padding:6px;font-size:.8rem}.calendar-table td.empty-cell{background:var(--bg-elevated)}.day-number{margin-bottom:4px;font-weight:700}.calendar-session{color:var(--text-dim);margin-bottom:2px;font-size:.75rem}.logout-button{text-align:left;width:100%;font:inherit;background:0 0;border:none;margin-top:24px}.login-page{justify-content:center;align-items:center;min-height:100vh;display:flex}.login-form{border:1px solid var(--border);border-radius:8px;flex-direction:column;gap:12px;width:320px;padding:32px;display:flex}.login-form input{background:var(--bg);border:1px solid var(--border);color:var(--text);border-radius:6px;padding:8px 10px}.login-error{color:#dc2626;font-size:.9rem}