:root{--bg:#f7f7f8;--surface:#fff;--border:#e5e7eb;--border-strong:#d1d5db;--text:#111827;--muted:#6b7280;--brand:#4f46e5;--brand-dark:#4338ca;--danger:#b91c1c;--success:#047857;--shadow:0 1px 2px rgba(0,0,0,.05),0 1px 3px rgba(0,0,0,.05)}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:16px;line-height:1.5}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3,h4{margin:0 0 12px}h1{font-size:28px;font-weight:700}h2{font-size:20px}h2,h3{font-weight:600}h3{font-size:16px}.btn,button{display:inline-block;background:var(--brand);color:#fff;border:none;padding:10px 16px;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;transition:background .12s;text-decoration:none}.btn:hover,button:hover{background:var(--brand-dark);text-decoration:none}.btn:disabled,button:disabled{background:var(--border-strong);cursor:not-allowed}.btn-secondary{background:#fff;color:var(--text);border:1px solid var(--border)}.btn-secondary:hover{background:#f3f4f6}.btn-danger{background:var(--danger)}.btn-danger:hover{background:#991b1b}.btn-ghost{background:transparent;color:var(--muted)}.btn-ghost:hover{background:#f3f4f6}input[type=date],input[type=email],input[type=number],input[type=password],input[type=text],input[type=time],select,textarea{width:100%;padding:10px 12px;border:1px solid var(--border-strong);border-radius:8px;background:#fff;font:inherit;color:inherit}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(79,70,229,.15)}textarea{min-height:80px;resize:vertical}label{display:block;font-size:13px;font-weight:500;color:var(--muted);margin-bottom:4px}.container{max-width:960px;margin:0 auto;padding:32px 24px}.container-narrow{max-width:560px}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:24px;box-shadow:var(--shadow)}.stack>*+*{margin-top:16px}.stack-sm>*+*{margin-top:8px}.stack-lg>*+*{margin-top:24px}.row{align-items:center}.row,.row-wrap{display:flex;gap:12px}.row-wrap{flex-wrap:wrap}.grow{flex:1 1}.muted{color:var(--muted)}.small{font-size:13px}.danger{color:var(--danger)}.success{color:var(--success)}.error-box{background:#fef2f2;border:1px solid #fecaca;color:#991b1b;padding:12px;border-radius:8px}.info-box{background:#eef2ff;border:1px solid #c7d2fe;color:#3730a3;padding:12px;border-radius:8px}.admin-nav{background:var(--surface);border-bottom:1px solid var(--border);padding:12px 24px;display:flex;gap:20px;align-items:center}.admin-nav a{color:var(--text);font-size:14px;font-weight:500}.admin-nav a.active{color:var(--brand)}.admin-nav .logout{margin-left:auto}.slot-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));grid-gap:8px;gap:8px}.slot-btn{background:#fff;color:var(--brand);border:1px solid var(--brand);padding:10px;font-weight:500;cursor:pointer;border-radius:8px;text-align:center;font-size:14px}.slot-btn:hover{background:#eef2ff}.slot-btn.selected{background:var(--brand);color:#fff}.date-grid{display:grid;grid-template-columns:repeat(7,1fr);grid-gap:4px;gap:4px;margin-top:12px}.date-cell{aspect-ratio:1;border:1px solid var(--border);border-radius:6px;background:#fff;color:var(--text);display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:14px;font-weight:500;cursor:pointer;padding:4px}.date-cell:not(.disabled):not(.selected){background:#eef2ff}.date-cell:hover:not(.disabled):not(.selected),.date-cell:not(.disabled):not(.selected){border-color:var(--brand);color:var(--brand)}.date-cell.disabled{color:var(--border-strong);cursor:not-allowed;background:#fafafa}.date-cell.selected{background:var(--brand);color:#fff;border-color:var(--brand)}.date-cell.has-slots:after{content:"";display:block;width:4px;height:4px;border-radius:50%;background:currentColor;margin-top:2px;opacity:.6}.day-headers{display:grid;grid-template-columns:repeat(7,1fr);grid-gap:4px;gap:4px;font-size:12px;color:var(--muted);text-align:center;font-weight:500}table{width:100%;border-collapse:collapse}td,th{text-align:left;padding:10px 12px;border-bottom:1px solid var(--border);font-size:14px}th{font-weight:600;color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.5px}