:root {
    --bg-color: var(--tg-theme-bg-color, #ffffff);
    --text-color: var(--tg-theme-text-color, #000000);
    --hint-color: var(--tg-theme-hint-color, #999999);
    --link-color: var(--tg-theme-link-color, #2481cc);
    --button-color: var(--tg-theme-button-color, #2481cc);
    --button-text-color: var(--tg-theme-button-text-color, #ffffff);
    --secondary-bg-color: var(--tg-theme-secondary-bg-color, #f0f0f0);
    
    --card-bg: var(--secondary-bg-color);
    --border-radius: 12px;
    --danger-color: #e53935;
    --warning-color: #fb8c00;
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow-x: hidden;
}

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.tabs {
    display: flex;
    background-color: var(--card-bg);
    padding: 10px;
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

.tab-btn {
    flex: 1;
    background: none;
    border: none;
    padding: 10px;
    font-size: 14px;
    color: var(--hint-color);
    font-weight: 600;
    cursor: pointer;
    border-radius: 8px;
    transition: 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.tab-btn i {
    font-size: 18px;
}

.tab-btn.active {
    color: var(--button-color);
    background-color: rgba(36, 129, 204, 0.1);
}

.content {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
}

.tab-pane {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-pane.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

.card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 16px;
    margin-bottom: 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.card h3 {
    margin-top: 0;
    margin-bottom: 16px;
    font-size: 16px;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    padding-bottom: 8px;
}

/* Dashboard */
.status-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.stat-label {
    color: var(--hint-color);
}

.stat-value {
    font-weight: bold;
}

/* Buttons */
.btn-group {
    display: flex;
    gap: 8px;
}

.btn {
    flex: 1;
    padding: 12px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    text-align: center;
    transition: opacity 0.2s;
}

.btn:active {
    opacity: 0.7;
}

.btn-primary {
    background-color: var(--button-color);
    color: var(--button-text-color);
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-warning {
    background-color: var(--warning-color);
    color: white;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--button-color);
    color: var(--button-color);
}

.w-100 { width: 100%; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 16px; }

/* Forms */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    color: var(--hint-color);
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="date"],
.form-group input[type="time"],
.form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid rgba(0,0,0,0.1);
    border-radius: 8px;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 14px;
    box-sizing: border-box;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 8px;
}
.checkbox-group label {
    margin-bottom: 0;
    font-size: 14px;
    color: var(--text-color);
}

/* Calendar */
.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.calendar-header button {
    background: none;
    border: none;
    color: var(--button-color);
    font-size: 18px;
    cursor: pointer;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
}

.day-header {
    text-align: center;
    font-size: 12px;
    color: var(--hint-color);
    font-weight: bold;
    margin-bottom: 8px;
}

.day-cell {
    aspect-ratio: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    position: relative;
}

.day-cell.today {
    border: 1px solid var(--button-color);
}

.day-cell.selected {
    background-color: var(--button-color);
    color: var(--button-text-color);
}

.day-cell.has-booking::after {
    content: '';
    position: absolute;
    bottom: 4px;
    width: 4px;
    height: 4px;
    background-color: var(--button-color);
    border-radius: 50%;
}
.day-cell.selected.has-booking::after {
    background-color: var(--button-text-color);
}

.day-cell.other-month {
    color: var(--hint-color);
    opacity: 0.5;
}

/* Bookings List */
.booking-item {
    background: var(--card-bg);
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-left: 4px solid var(--button-color);
}
.booking-item.cancelling {
    opacity: 0.5;
}
.booking-info h4 { margin: 0 0 4px 0; font-size: 15px; }
.booking-info p { margin: 0; font-size: 13px; color: var(--hint-color); }
.text-muted { color: var(--hint-color); }
.text-center { text-align: center; }
.mb-2 { margin-bottom: 8px; }

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: rgba(0,0,0,0.5);
    z-index: 100;
    align-items: flex-end;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    width: 100%;
    margin-bottom: 0;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

/* Chips */
.chip-group { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 15px; }
.chip { 
    padding: 8px 16px; 
    border: 1px solid var(--hint-color); 
    border-radius: 20px; 
    cursor: pointer; 
    user-select: none; 
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: all 0.2s ease;
}
.chip.selected { 
    background-color: var(--button-color); 
    color: var(--button-text-color); 
    border-color: var(--button-color); 
}

/* Search Results */
.court-item {
    padding: 10px;
    border: 1px solid var(--hint-color);
    border-radius: 8px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.court-info h4 { margin: 0 0 5px 0; }
.court-info p { margin: 0; color: var(--hint-color); font-size: 14px; }