:root {
    --gab-primary: #2563eb;
    --gab-primary-hover: #1d4ed8;
    --gab-bg: #ffffff;
    --gab-text: #1f2937;
    --gab-text-light: #6b7280;
    --gab-border: #e5e7eb;
    --gab-success: #10b981;
    --gab-error: #ef4444;
}

#gab-booking-container {
    max-width: 500px;
    margin: 2rem auto;
    padding: 2rem;
    background: var(--gab-bg);
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--gab-text);
    border: 1px solid var(--gab-border);
}

.gab-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.gab-header h2 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--gab-text);
}

.gab-header p {
    color: var(--gab-text-light);
    font-size: 0.875rem;
}

.gab-field-group {
    margin-bottom: 1.5rem;
}

.gab-label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

#gab-date-picker {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--gab-border);
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

#gab-date-picker:focus {
    outline: none;
    border-color: var(--gab-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.gab-slots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 0.75rem;
    margin-top: 1rem;
}

.gab-slot-btn {
    padding: 0.5rem;
    background: #f3f4f6;
    color: var(--gab-text);
    border: 1px solid var(--gab-border);
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    text-align: center;
    transition: all 0.2s;
}

.gab-slot-btn:hover {
    background: var(--gab-primary);
    color: white;
    border-color: var(--gab-primary);
}

.gab-slot-btn.selected {
    background: var(--gab-primary);
    color: white;
    border-color: var(--gab-primary);
}

#gab-form-wrapper {
    border-top: 1px solid var(--gab-border);
    padding-top: 1.5rem;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.gab-summary-box {
    background: #eff6ff;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    border: 1px solid #dbeafe;
}

.gab-summary-box p {
    margin: 0;
    font-size: 0.875rem;
    color: #1e40af;
}

.gab-input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--gab-border);
    border-radius: 6px;
    margin-bottom: 1rem;
    font-size: 1rem;
}

.gab-submit-btn {
    width: 100%;
    padding: 0.875rem;
    background: var(--gab-primary);
    color: white;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.gab-submit-btn:hover {
    background: var(--gab-primary-hover);
}

.gab-submit-btn:disabled {
    background: var(--gab-text-light);
    cursor: not-allowed;
}

#gab-message {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: 6px;
    font-size: 0.875rem;
    display: none;
}

.msg-success {
    display: block !important;
    background: #ecfdf5;
    color: var(--gab-success);
    border: 1px solid #a7f3d0;
}

.msg-error {
    display: block !important;
    background: #fef2f2;
    color: var(--gab-error);
    border: 1px solid #fecaca;
}