.site-header {
    background-color: #000080; /* Navy Blue */
    padding: 1rem 0;
    margin-bottom: 2rem;
}

.site-header .container {
    max-width: 100%;
    padding-left: 2rem;
    padding-right: 2rem;
}

.logo-placeholder {
    width: 75px;
    height: 75px;
    margin-right: 15px;
    border-radius: 75%;
    overflow: hidden;
}

.logo-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.site-title {
    color: white;
    margin: 0;
    font-size: 1.5rem;
}

.header-buttons {
    margin-left: auto;
    padding-left: 1rem;
}

.time-slots-wrapper {
    background: #fff;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: relative;
}

.time-section {
    margin-bottom: 30px;
}

.time-section h3 {
    color: #333;
    font-size: 24px;
    margin-bottom: 15px;
}

.time-slots {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 10px;
}

.time-slot {
    position: relative;
}

.time-slot input[type="radio"] {
    display: none;
}

.time-slot label {
    display: block;
    padding: 10px;
    background: #f8f9fa;
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.time-slot input[type="radio"]:checked + label {
    background: #000080;
    color: white;
}

.time-slot.booked label {
    background: #e9ecef;
    color: #adb5bd;
    text-decoration: line-through;
    cursor: not-allowed;
}

.time-slot input[type="radio"]:disabled + label {
    cursor: not-allowed;
}

.time-slot:hover label:not(:disabled) {
    background: #e2e6ea;
}

.time-slot input[type="radio"]:checked + label:hover {
    background: #000066;
}

.error-message {
    font-size: 0.875rem;
    color: #dc3545;
    margin-top: 0.25rem;
}

.form-control.is-invalid,
.form-select.is-invalid {
    border-color: #dc3545;
}

.time-slots-wrapper .error-message {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    text-align: center;
    background-color: rgba(220, 53, 69, 0.1);
    padding: 0.5rem;
    border-radius: 0 0 8px 8px;
    font-weight: bold;
}

#time-slots-container {
    position: relative;
    margin-bottom: 1rem;
}

#time-slots-container .error-message {
    position: absolute;
    bottom: -1.5rem;
    left: 0;
    width: 100%;
    text-align: center;
    color: #dc3545;
    font-size: 0.875rem;
    font-weight: bold;
}

.btn-primary {
    background-color: #000080 !important;
    border-color: #000080 !important;
}

.btn-primary:hover {
    background-color: #000066 !important;
    border-color: #000066 !important;
}

.btn-primary:active, .btn-primary:focus {
    background-color: #000066 !important;
    border-color: #000066 !important;
    box-shadow: 0 0 0 0.25rem rgba(0, 0, 128, 0.25) !important;
}

.btn-secondary {
    background-color: #f8f9fa !important;
    border-color: #000080 !important;
    color: #000080 !important;
}

.btn-secondary:hover {
    background-color: #e2e6ea !important;
    border-color: #000066 !important;
    color: #000066 !important;
}