body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f0f2f5;
    overflow-x: hidden;
}

.chat-container {
    width: 100%;
    max-width: 1200px;
    height: 100vh;
    margin: 0 auto;
    border: 1px solid #ccc;
    border-radius: 8px;
    background-color: white;
    display: flex;
    flex-direction: column;
    box-sizing: border-box;
}

.chat-header {
    background: linear-gradient(45deg, #0288d1, #03a9f4);
    color: white;
    padding: 12px;
    text-align: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

.bot-message, .user-message {
    padding: 10px;
    margin: 8px 0;
    border-radius: 8px;
    max-width: 80%;
    word-wrap: break-word;
    font-size: 0.875rem;
    animation: slideIn 0.3s ease;
}

.bot-message {
    background-color: #e3f2fd;
}

.user-message {
    background-color: #ffebee;
    margin-left: auto;
    text-align: right;
}

@keyframes slideIn {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.chat-input {
    display: flex;
    padding: 10px;
    border-top: 1px solid #ccc;
    flex-shrink: 0;
    background-color: white;
    box-sizing: border-box;
    position: sticky;
    bottom: env(safe-area-inset-bottom);
}

.chat-input input {
    flex: 1;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 0.875rem;
    min-height: 48px;
    box-sizing: border-box;
}

.chat-input button {
    padding: 8px 12px;
    margin-left: 8px;
    background-color: #ff8f00;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.875rem;
    min-height: 48px;
    min-width: 80px;
    transition: background-color 0.2s ease;
}

.chat-input button:hover {
    background-color: #f57c00;
}

.items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    padding: 12px;
    margin: 8px 0;
    background-color: #f9f9f9;
    border-radius: 8px;
}

.item-card {
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 12px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.item-card:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.item-image {
    width: 100%;
    height: 120px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 8px;
    loading: lazy;
}

.item-content {
    width: 100%;
}

.item-name {
    font-size: 0.875rem;
    font-weight: bold;
    color: #333;
    margin-bottom: 5px;
}

.item-field {
    font-size: 0.75rem;
    margin: 3px 0;
    color: #555;
}

.item-field strong {
    color: #0288d1;
}

.item-description {
    font-size: 0.75rem;
    margin: 5px 0;
    color: #555;
}

.button-container {
    display: flex;
    gap: 8px;
    margin-top: 8px;
}

.show-button, .add-button {
    padding: 6px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.75rem;
    flex: 1;
    min-width: 50px;
    min-height: 36px;
    transition: background-color 0.2s ease;
}

.show-button {
    background-color: #0288d1;
    color: white;
}

.show-button:hover {
    background-color: #0277bd;
}

.add-button {
    background-color: #4caf50;
    color: white;
}

.add-button:hover {
    background-color: #45a049;
}

.options-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 8px 0;
}

.option-button {
    padding: 8px 12px;
    background-color: #7b1fa2;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.875rem;
    min-width: 80px;
    min-height: 48px;
    transition: opacity 0.2s ease;
}

.option-button.green { background-color: #4caf50; }
.option-button.red { background-color: #d32f2f; }
.option-button.gray { background-color: #616161; }
.option-button:hover { opacity: 0.9; }

.selection-box {
    background-color: #e1f5fe;
    padding: 12px;
    border: 1px solid #0288d1;
    border-radius: 8px;
    margin: 8px 0;
    font-size: 0.875rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    position: relative;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.selection-box::before {
    content: "Selected Items";
    position: sticky;
    top: 0;
    background: #0288d1;
    color: white;
    padding: 8px;
    border-radius: 8px 8px 0 0;
    font-size: 0.875rem;
    font-weight: bold;
    width: 100%;
    box-sizing: border-box;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.selection-box span {
    background-color: #bbdefb;
    padding: 4px 10px;
    border-radius: 8px;
    font-size: 0.875rem;
}

.selected-item {
    display: flex;
    align-items: center;
    background-color: #bbdefb;
    padding: 4px 10px;
    border-radius: 8px;
    font-size: 0.75rem;
}

.selected-item-image {
    width: 30px;
    height: 30px;
    object-fit: cover;
    border-radius: 8px;
    margin-right: 8px;
    loading: lazy;
}

.submit-button {
    padding: 8px 12px;
    background-color: #0288d1;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.875rem;
    min-width: 80px;
    min-height: 48px;
    transition: background-color 0.2s ease;
}

.submit-button:hover {
    background-color: #0277bd;
}

.remove-button {
    padding: 4px 8px;
    margin-left: 8px;
    background-color: #d32f2f;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.75rem;
    min-height: 36px;
    transition: background-color 0.2s ease;
}

.remove-button:hover {
    background-color: #b71c1c;
}

.manual-input, .order-name-input {
    padding: 6px;
    border: 1px solid #0288d1;
    border-radius: 8px;
    font-size: 0.875rem;
    width: 120px;
    min-height: 48px;
}

.quantity-input {
    padding: 6px;
    border: 1px solid #0288d1;
    border-radius: 8px;
    font-size: 0.875rem;
    width: 60px;
    min-height: 48px;
}

.quantity-button {
    padding: 4px 8px;
    background-color: #0288d1;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.75rem;
    min-height: 36px;
    transition: background-color 0.2s ease;
}

.quantity-button:hover {
    background-color: #0277bd;
}

.spinner {
    border: 4px solid #0288d1;
    border-top: 4px solid transparent;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    animation: spin 1s linear infinite;
    margin: 10px auto;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #4caf50;
    color: white;
    padding: 10px;
    border-radius: 8px;
    font-size: 0.875rem;
    animation: fadeInOut 3s ease forwards;
    z-index: 1000;
}

@keyframes fadeInOut {
    0% { opacity: 0; transform: translateY(20px); }
    10%, 90% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(20px); }
}

@media (max-width: 480px) {
    .chat-container {
        border-radius: 0;
        height: calc(100vh - env(safe-area-inset-bottom));
    }

    .chat-header {
        font-size: 1rem;
        padding: 8px;
    }

    .chat-messages {
        padding: 6px;
    }

    .bot-message, .user-message {
        font-size: 0.75rem;
        padding: 8px;
        margin: 6px 0;
    }

    .chat-input input {
        font-size: 0.75rem;
        min-height: 48px;
        padding: 6px;
    }

    .chat-input button {
        font-size: 0.75rem;
        min-height: 48px;
        padding: 6px 10px;
        min-width: 80px;
    }

    .items-grid {
        grid-template-columns: 1fr;
        gap: 8px;
        padding: 8px;
    }

    .item-card {
        max-width: 100%;
    }

    .item-image {
        height: 100px;
    }

    .item-name {
        font-size: 0.75rem;
    }

    .item-field, .item-description {
        font-size: 0.75rem;
    }

    .show-button, .add-button, .quantity-button {
        font-size: 0.75rem;
        padding: 4px;
        min-width: 40px;
        min-height: 36px;
    }

    .options-container {
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
    }

    .option-button {
        font-size: 0.75rem;
        padding: 6px 10px;
        min-width: 100%;
        min-height: 48px;
    }

    .selection-box {
        padding: 8px;
        gap: 6px;
    }

    .selection-box::before {
        font-size: 0.75rem;
        padding: 6px;
    }

    .selection-box span {
        font-size: 0.75rem;
        padding: 3px 8px;
    }

    .selected-item {
        font-size: 0.75rem;
        padding: 3px 8px;
    }

    .selected-item-image {
        width: 24px;
        height: 24px;
    }

    .submit-button {
        font-size: 0.75rem;
        padding: 6px 10px;
        min-width: 80px;
        min-height: 48px;
    }

    .remove-button {
        font-size: 0.75rem;
        padding: 3px 6px;
        min-height: 36px;
    }

    .manual-input, .order-name-input {
        width: 100px;
        font-size: 0.75rem;
        padding: 4px;
        min-height: 48px;
    }

    .quantity-input {
        width: 50px;
        font-size: 0.75rem;
        padding: 4px;
        min-height: 48px;
    }
}

@media (min-width: 481px) and (max-width: 768px) {
    .chat-container {
        max-width: 100%;
    }

    .chat-header {
        font-size: 1.125rem;
    }

    .chat-messages {
        padding: 8px;
    }

    .bot-message, .user-message {
        font-size: 0.875rem;
        padding: 9px;
    }

    .chat-input input {
        font-size: 0.875rem;
        min-height: 48px;
    }

    .chat-input button {
        font-size: 0.875rem;
        min-height: 48px;
        padding: 7px 11px;
    }

    .items-grid {
        grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
        gap: 10px;
    }

    .item-image {
        height: 110px;
    }

    .item-name {
        font-size: 0.875rem;
    }

    .item-field, .item-description {
        font-size: 0.75rem;
    }

    .show-button, .add-button, .quantity-button {
        font-size: 0.75rem;
        padding: 5px;
        min-width: 45px;
        min-height: 36px;
    }

    .option-button {
        font-size: 0.875rem;
        padding: 7px 11px;
        min-height: 48px;
    }

    .selection-box {
        padding: 10px;
        gap: 7px;
    }

    .selection-box span {
        font-size: 0.875rem;
    }

    .selected-item {
        font-size: 0.75rem;
    }

    .selected-item-image {
        width: 28px;
        height: 28px;
    }

    .submit-button {
        font-size: 0.875rem;
        padding: 7px 11px;
        min-height: 48px;
    }

    .remove-button {
        font-size: 0.75rem;
        padding: 4px 7px;
        min-height: 36px;
    }

    .manual-input, .order-name-input {
        width: 110px;
        font-size: 0.875rem;
        min-height: 48px;
    }

    .quantity-input {
        width: 55px;
        font-size: 0.875rem;
        min-height: 48px;
    }
}

@media (min-width: 769px) {
    .chat-container {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }

    .chat-messages, .chat-input {
        grid-column: 1 / 2;
    }

    .suggestions-list, .ingredients-list {
        grid-column: 2 / 3;
    }

    .selection-box {
        grid-column: 2 / 3;
        grid-row: 1 / 3;
    }
}