body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--tg-theme-bg-color, #ffffff);
    color: var(--tg-theme-text-color, #000000);
    margin: 0;
    padding: 20px;
}
.container {
    max-width: 600px;
    margin: 0 auto;
}
h1 {
    text-align: center;
    font-size: 20px;
    margin-bottom: 20px;
}
#user-info {
    text-align: center;
    margin-bottom: 20px;
    font-size: 14px;
    color: var(--tg-theme-hint-color, #888);
}
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 15px;
}
.day-card {
    background-color: var(--tg-theme-secondary-bg-color, #f0f0f0);
    border-radius: 12px;
    padding: 15px;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    cursor: pointer;
    transition: transform 0.2s;
    position: relative;
}
.day-card:active {
    transform: scale(0.98);
}
.day-info {
    margin-bottom: 15px;
}
.date-text {
    display: block;
    font-weight: bold;
    font-size: 16px;
    margin-bottom: 5px;
    text-transform: capitalize;
}
.slots-info {
    font-size: 14px;
    color: var(--tg-theme-hint-color, #888);
}
.actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.status-btn {
    width: 100%;
    padding: 10px;
    border-radius: 8px;
    border: none;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    color: white;
    transition: opacity 0.2s;
}
.status-btn:active {
    opacity: 0.8;
}
.btn-book {
    background-color: var(--tg-theme-button-color, #2ecc71); 
}
.btn-booked {
    background-color: var(--tg-theme-destructive-text-color, #e74c3c); /* Red to cancel */
}
.btn-full {
    background-color: var(--tg-theme-hint-color, #95a5a6);
    cursor: not-allowed;
}
.edit-link {
    font-size: 12px;
    color: var(--tg-theme-link-color, #2481cc);
    text-decoration: underline;
    cursor: pointer;
    margin-top: 5px;
    display: inline-block;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}
.hidden {
    display: none;
}
.modal-content {
    background: var(--tg-theme-bg-color, #ffffff);
    padding: 24px;
    border-radius: 16px;
    width: 85%;
    max-width: 320px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}
.modal-content h3 {
    margin-top: 0;
}
.modal-actions {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    margin-top: 20px;
}
.modal-actions button {
    flex: 1;
    padding: 12px;
    border-radius: 8px;
    border: none;
    font-weight: 600;
    cursor: pointer;
}
.btn-primary {
    background-color: var(--tg-theme-button-color, #2481cc);
    color: var(--tg-theme-button-text-color, #ffffff);
}
.btn-secondary {
    background-color: var(--tg-theme-secondary-bg-color, #f0f0f0);
    color: var(--tg-theme-text-color, #000000);
}
input[type="number"] {
    width: 60px;
    padding: 10px;
    font-size: 18px;
    text-align: center;
    border: 2px solid var(--tg-theme-hint-color, #ccc);
    border-radius: 8px;
    background: var(--tg-theme-bg-color, #fff);
    color: var(--tg-theme-text-color, #000);
}