.calendar-nav{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px}.calendar-nav button{background:#f0f0f0;border:none;padding:8px 15px;cursor:pointer;border-radius:4px;font-size:16px;transition:background-color .2s}.calendar-nav button:hover{background:#e0e0e0}.calendar-nav button:focus{outline:2px solid #4d90fe}.calendar-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:5px;margin-bottom:15px}.calendar-cell{padding:12px 5px;text-align:center;border-radius:4px;font-size:14px;position:relative}.calendar-cell.header{font-weight:700;background:#f5f5f5;padding:8px 5px}.calendar-cell.past{background-color:#f9f9f9;color:#ccc;cursor:not-allowed}.calendar-cell.booked{background-color:#ffebee;color:#c62828;cursor:not-allowed;position:relative}.calendar-cell.booked::after{content:"";position:absolute;top:50%;left:5px;right:5px;height:1px;background:#c62828;transform:rotate(-45deg)}.calendar-cell.available{background-color:#e8f5e9;cursor:pointer;transition:all .2s}.calendar-cell.available:hover{background-color:#c8e6c9;transform:scale(1.05)}.calendar-cell.range{background-color:#81c784!important;color:#2e7d32;font-weight:700}.calendar-cell.range-start{border-top-left-radius:50%;border-bottom-left-radius:50%}.calendar-cell.range-end{border-top-right-radius:50%;border-bottom-right-radius:50%}.calendar-cell.invalid-range{background-color:#fcc!important;color:#c00!important}.invalid-selection{animation:shake .5s;background-color:#fcc!important}.whatsapp-button{display:block;background:#24880a;color:white!important;text-align:center;padding:12px;margin-top:15px;border-radius:4px;text-decoration:none;font-weight:700;transition:background-color .3s ease}.whatsapp-button:hover{background-color:#3a3a3a!important;color:white!important}.calendar-month-year{font-size:18px;font-weight:600}.date-tooltip{position:absolute;bottom:100%;left:50%;transform:translateX(-50%);background:#333;color:white;padding:5px 10px;border-radius:4px;font-size:12px;white-space:nowrap;pointer-events:none;opacity:0;transition:opacity .2s;z-index:10;margin-bottom:5px}.date-tooltip:after{content:"";position:absolute;top:100%;left:50%;transform:translateX(-50%);border-width:5px;border-style:solid;border-color:#333 transparent transparent transparent}.calendar-cell:hover .date-tooltip{opacity:1}.calendar-legend{display:flex;flex-wrap:wrap;gap:10px;margin-top:15px;padding-top:15px;border-top:1px solid #eee}.legend-item{display:flex;align-items:center;font-size:13px;gap:5px}.legend-color{width:16px;height:16px;border-radius:3px}.legend-available{background-color:#e8f5e9}.legend-booked{background-color:#ffebee;position:relative}.legend-booked::after{content:"";position:absolute;top:50%;left:2px;right:2px;height:1px;background:#c62828;transform:rotate(-45deg)}.legend-range{background-color:#81c784}.legend-past{background-color:#f9f9f9}.legend-invalid{background-color:#fcc}@media (max-width:480px){.calendar-cell{padding:10px 2px;font-size:13px}.calendar-legend{gap:8px}.legend-item{font-size:12px}.date-tooltip{font-size:11px;padding:4px 8px}}