:root {
    --day-width: 40px;
    --month-label-height: 28px;
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 100%;
    margin: 0 auto;
    background-color: white;
    min-height: 100vh;
}

/* Header */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.controls {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

/* Room selector */
.room-selector {
    padding: 0.5rem 1rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 0.5rem;
    background: rgba(255, 255, 255, 0.9);
    color: #333;
    font-size: 1rem;
    cursor: pointer;
    min-width: 120px;
}

/* Navigation */
.navigation {
    padding: 1rem;
    background: white;
    border-bottom: 2px solid #e0e0e0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.nav-controls {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.month-picker {
    padding: 0.5rem;
    border: 2px solid #e0e0e0;
    border-radius: 0.5rem;
    font-size: 1rem;
    cursor: pointer;
}

.filter-dropdown {
    padding: 0.5rem 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 0.5rem;
    font-size: 1rem;
    cursor: pointer;
}

/* Buttons */
.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

.btn-primary {
    background: rgba(255, 255, 255, 0.9);
    color: #667eea;
}

.btn-primary:hover {
    background: white;
}

.btn-primary.active {
    background: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn-secondary {
    background: #667eea;
    color: white;
}

.btn-secondary:hover {
    background: #5568d3;
}

.btn-secondary:active {
    transform: scale(0.98);
}

/* Calendar container */
.calendar {
    overflow-x: auto;
    overflow-y: visible;
    -webkit-overflow-scrolling: touch;
    padding: 0rem;
}

.calendar-grid {
    display: grid;
    grid-template-columns: auto;
    min-width: 100%;
    position: relative;
}

.hidden {
    display: none !important;
}

.muted {
    color: #6b7280;
}

.booking-bar.selected {
    outline: 3px solid rgba(102, 126, 234, 0.6);
    outline-offset: 1px;
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.35);
    z-index: 5;
}

.booking-details {
    padding: 1.5rem;
    background: #f3f4f6;
    display: flex;
    justify-content: center;
}

.booking-details-card {
    width: 100%;
    max-width: 420px;
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.15);
    padding: 1.5rem;
    position: relative;
}

.booking-details-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.booking-details-header h2 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
}

.booking-details-chip {
    background: #e8edff;
    color: #4a56a6;
    border-radius: 999px;
    padding: 0.25rem 0.75rem;
    font-size: 0.85rem;
    font-weight: 600;
}

.booking-details-grid {
    display: grid;
    gap: 0.75rem;
}

.booking-details-row {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: center;
}

.booking-detail-label {
    font-weight: 600;
    color: #4a5568;
}

.booking-detail-value {
    color: #1f2933;
    text-align: right;
    font-weight: 500;
}

.booking-details-row-notes {
    align-items: flex-start;
}

.booking-detail-notes {
    text-align: left;
    display: block;
    white-space: pre-line;
    max-width: 100%;
}

.booking-detail-link {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
}

.booking-detail-link:hover,
.booking-detail-link:focus {
    text-decoration: underline;
}

.booking-details-empty {
    color: #6b7280;
    text-align: center;
    padding: 0.75rem 0;
}

.month-labels {
    display: flex;
    position: sticky;
    top: 0;
    background: white;
    z-index: 25;
    border-bottom: 1px solid #e0e0e0;
}

.month-label-spacer {
    width: 100px;
    background: #f9f9f9;
    border-right: 2px solid #e0e0e0;
    position: sticky;
    left: 0;
    z-index: 25;
}

.month-label-track {
    position: relative;
    flex: 0 0 auto;
    height: var(--month-label-height);
}

.month-label {
    position: absolute;
    top: 4px;
    transform: translateX(-50%);
    font-size: 0.9rem;
    font-weight: 600;
    color: #444;
    white-space: nowrap;
    pointer-events: none;
}

/* Room row */
.room-row {
    display: grid;
    grid-template-columns: 100px max-content;
    border-bottom: 1px solid #e0e0e0;
    min-height: 60px;
}

.room-name {
    padding: 1rem;
    font-weight: 600;
    background: #f9f9f9;
    border-right: 2px solid #e0e0e0;
    display: flex;
    align-items: center;
    position: sticky;
    left: 0;
    z-index: 10;
}

.room-calendar {
    position: relative;
    min-height: 60px;
}

/* Date header */
.date-header {
    display: flex;
    border-bottom: 2px solid #e0e0e0;
    position: sticky;
    top: var(--month-label-height);
    background: white;
    z-index: 20;
    margin-bottom: 0.5rem;
}

.date-header-spacer {
    width: 100px;
    background: #f9f9f9;
    border-right: 2px solid #e0e0e0;
    position: sticky;
    left: 0;
    z-index: 21;
}

.date-cells {
    display: flex;
    flex: 0 0 auto;
}

.date-cell {
    min-width: var(--day-width);
    width: var(--day-width);
    padding: 0.5rem;
    text-align: center;
    border-right: 1px solid #f0f0f0;
    font-size: 0.85rem;
}

.date-cell.today {
    background: #fff9e6;
    font-weight: 600;
}

.date-cell .day-name {
    font-size: 0.7rem;
    color: #888;
    display: block;
}

.date-cell .day-number {
    font-weight: 600;
    display: block;
}

.date-cell.weekend {
    background: #f9f9f9;
}

/* Booking bars */
.booking-bar {
    position: absolute;
    height: 30px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    padding: 0 0.5rem;
    font-size: 0.75rem;
    color: white;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    overflow: hidden;
    white-space: nowrap;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.booking-bar:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.booking-bar.airbnb {
    background: linear-gradient(135deg, #FF5A5F 0%, #FF385C 100%);
}

.booking-bar.direct {
    background: linear-gradient(135deg, #f0f0f0 0%, #d9d9d9 100%);
    color: #000000;
    border: 1px solid #333;
}

.booking-bar.booking {
    background: linear-gradient(135deg, #003580 0%, #0057B8 100%);
}

/* Loading state */
.loading {
    padding: 2rem;
    text-align: center;
    color: #888;
    font-size: 1.1rem;
}

/* Error state */
.error {
    padding: 2rem;
    text-align: center;
    color: #d32f2f;
}

/* Responsive design - Mobile optimization */
@media (max-width: 768px) {
    :root {
        --day-width: 32px;
        --month-label-height: 24px;
    }
    .month-label-spacer {
        width: 80px;
    }
    .header {
        padding: 0;
    }
    
    .header h1 {
        font-size: 1.25rem;
        width: 100%;
    }
    
    .controls {
        width: 100%;
        justify-content: space-between;
    }
    
    .navigation {
        padding: 0.75rem;
        flex-direction: column;
        align-items: stretch;
    }
    
    .nav-controls {
        width: 100%;
        justify-content: space-between;
    }
    
    .filters {
        width: 100%;
    }
    
    .filter-dropdown,
    .room-selector {
        width: 100%;
    }
    
    .calendar {
        padding: 0.5rem;
    }

    .booking-details {
        padding: 1rem;
    }

    .booking-details-card {
        max-width: 100%;
        padding: 1.25rem;
    }

    .booking-details-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.35rem;
    }

    .booking-detail-value {
        text-align: left;
        width: 100%;
    }
    
    .room-name {
        width: 80px;
        padding: 0.75rem 0.5rem;
        font-size: 0.9rem;
    }
    
    .room-row {
        grid-template-columns: 80px max-content;
    }
    
    .date-header-spacer {
        width: 80px;
    }
    
    .date-cell {
        padding: 0.4rem;
    }
    
    .booking-bar {
        height: 28px;
        font-size: 0.7rem;
        padding: 0 0.4rem;
    }
}

@media (max-width: 480px) {
    :root {
        --day-width: 28px;
        --month-label-height: 22px;
    }
    .month-label-spacer {
        width: 70px;
    }
    .header h1 {
        font-size: 1.1rem;
    }
    
    .btn {
        padding: 0.4rem 0.75rem;
        font-size: 0.9rem;
    }
    
    .room-name {
        width: 70px;
        font-size: 0.85rem;
    }
    
    .room-row {
        grid-template-columns: 70px max-content;
    }
    
    .date-header-spacer {
        width: 70px;
    }
    
    .date-cell {
        padding: 0.3rem;
        font-size: 0.75rem;
    }

    .booking-details-card {
        padding: 1rem;
    }
}

/* Touch-friendly improvements */
@media (hover: none) and (pointer: coarse) {
    .btn {
        min-height: 44px;
        min-width: 44px;
    }
    
    .booking-bar {
        min-height: 36px;
    }
}

/* Scrollbar styling */
.calendar::-webkit-scrollbar {
    height: 8px;
}

.calendar::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.calendar::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

.calendar::-webkit-scrollbar-thumb:hover {
    background: #555;
}