* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --bg-color: #f8fafc;
    --chat-bg: #ffffff;
    --user-msg-bg: #2563eb;
    --user-msg-color: #ffffff;
    --assistant-msg-bg: #f1f5f9;
    --assistant-msg-color: #1e293b;
    --border-color: #e2e8f0;
    --text-muted: #64748b;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.chat-container {
    width: 100%;
    max-width: 800px;
    height: 90vh;
    max-height: 800px;
    background: var(--chat-bg);
    border-radius: 16px;
    box-shadow: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-header {
    padding: 20px 24px;
    background: linear-gradient(135deg, #1e3a8a 0%, #3730a3 100%);
    color: white;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo svg {
    width: 32px;
    height: 32px;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.subtitle {
    margin-top: 4px;
    font-size: 0.875rem;
    opacity: 0.9;
    margin-left: 44px;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    background: var(--bg-color);
}

.message {
    max-width: 85%;
    animation: fadeIn 0.3s ease;
}

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

.message.user {
    align-self: flex-end;
}

.message.assistant {
    align-self: flex-start;
}

.message-content {
    padding: 12px 16px;
    border-radius: 16px;
    line-height: 1.6;
    font-size: 0.95rem;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.text-content {
    white-space: pre-wrap;
}

.text-content.markdown-content {
    white-space: normal;
}

.message.user .message-content {
    background: var(--user-msg-bg);
    color: var(--user-msg-color);
    border-bottom-right-radius: 4px;
}

.message.assistant .message-content {
    background: var(--assistant-msg-bg);
    color: var(--assistant-msg-color);
    border-bottom-left-radius: 4px;
}

.message-content ul {
    margin: 8px 0 0 20px;
}

.message-content li {
    margin: 4px 0;
}

.message.typing .message-content::after {
    content: '...';
    animation: typing 1s infinite;
}

@keyframes typing {
    0%, 100% { content: '.'; }
    33% { content: '..'; }
    66% { content: '...'; }
}

.tool-indicator {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: italic;
    padding: 4px 0;
}

/* Spinner styles */
.spinner-container {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.spinner-text {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-style: italic;
    min-width: 200px;
}

.spinner-text.typing::after {
    content: '|';
    animation: blink 0.7s infinite;
    margin-left: 2px;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.tools-container:empty {
    display: none;
}

/* Markdown content styling */
.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4 {
    margin-top: 1em;
    margin-bottom: 0.5em;
    font-weight: 600;
}

.markdown-content h1 { font-size: 1.4em; }
.markdown-content h2 { font-size: 1.25em; }
.markdown-content h3 { font-size: 1.1em; }
.markdown-content h4 { font-size: 1em; }

.markdown-content h1:first-child,
.markdown-content h2:first-child,
.markdown-content h3:first-child,
.markdown-content h4:first-child {
    margin-top: 0;
}

.markdown-content p {
    margin: 0.5em 0;
}

.markdown-content p:first-child {
    margin-top: 0;
}

.markdown-content p:last-child {
    margin-bottom: 0;
}

.markdown-content strong {
    font-weight: 600;
}

.markdown-content em {
    font-style: italic;
}

.markdown-content ul,
.markdown-content ol {
    margin: 0.5em 0 0.5em 1.5em;
    padding: 0;
}

.markdown-content li {
    margin: 0.25em 0;
}

.markdown-content code {
    background: rgba(0, 0, 0, 0.08);
    padding: 0.15em 0.4em;
    border-radius: 4px;
    font-family: 'SF Mono', Monaco, 'Courier New', monospace;
    font-size: 0.9em;
}

.markdown-content pre {
    background: rgba(0, 0, 0, 0.08);
    padding: 0.75em 1em;
    border-radius: 8px;
    overflow-x: auto;
    margin: 0.5em 0;
}

.markdown-content pre code {
    background: transparent;
    padding: 0;
}

.markdown-content blockquote {
    border-left: 3px solid var(--primary-color);
    margin: 0.5em 0;
    padding-left: 1em;
    color: var(--text-muted);
}

.markdown-content a {
    color: var(--primary-color);
    text-decoration: underline;
}

.markdown-content a:hover {
    color: var(--primary-dark);
}

.markdown-content hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 1em 0;
}

.markdown-content table {
    border-collapse: collapse;
    margin: 0.5em 0;
    width: 100%;
}

.markdown-content th,
.markdown-content td {
    border: 1px solid var(--border-color);
    padding: 0.5em 0.75em;
    text-align: left;
}

.markdown-content th {
    background: rgba(0, 0, 0, 0.04);
    font-weight: 600;
}

.chat-input-area {
    padding: 16px 24px;
    background: var(--chat-bg);
    border-top: 1px solid var(--border-color);
}

#chat-form {
    display: flex;
    gap: 12px;
}

#message-input {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

#message-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

#send-button {
    padding: 12px 20px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}

#send-button:hover {
    background: var(--primary-dark);
}

#send-button:active {
    transform: scale(0.95);
}

#send-button:disabled {
    background: var(--text-muted);
    cursor: not-allowed;
    transform: none;
}

#send-button svg {
    width: 20px;
    height: 20px;
}

.status {
    margin-top: 8px;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
}

.status.connected {
    color: #22c55e;
}

.status.disconnected {
    color: #ef4444;
}

.status.connecting {
    color: #f59e0b;
}

/* Scrollbar styling */
.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* User Selection Screen */
.user-selection-container {
    width: 100%;
    max-width: 500px;
    background: var(--chat-bg);
    border-radius: 16px;
    box-shadow: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    overflow: hidden;
}

.user-selection-box {
    padding: 40px 32px;
    text-align: center;
}

.user-selection-box .logo {
    justify-content: center;
    margin-bottom: 8px;
}

.user-selection-box .logo svg {
    width: 40px;
    height: 40px;
    color: var(--primary-color);
}

.user-selection-box .logo h1 {
    font-size: 1.75rem;
    color: var(--assistant-msg-color);
}

.selection-subtitle {
    color: var(--text-muted);
    margin-bottom: 32px;
    font-size: 1rem;
}

.email-select-wrapper {
    margin-bottom: 24px;
}

.email-select {
    width: 100%;
    padding: 14px 16px;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    background: white;
    cursor: pointer;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 20px;
}

.email-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.email-select:hover {
    border-color: var(--primary-color);
}

.start-chat-btn {
    width: 100%;
    padding: 14px 24px;
    font-size: 1rem;
    font-weight: 600;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s, opacity 0.2s;
}

.start-chat-btn:hover:not(:disabled) {
    background: var(--primary-dark);
}

.start-chat-btn:active:not(:disabled) {
    transform: scale(0.98);
}

.start-chat-btn:disabled {
    background: var(--text-muted);
    cursor: not-allowed;
    opacity: 0.7;
}

/* User info in chat header */
.user-info {
    margin-top: 8px;
    margin-left: 44px;
    font-size: 0.8rem;
    opacity: 0.85;
    font-style: italic;
}

/* Booking info in chat header */
.booking-info {
    margin-top: 10px;
    margin-left: 44px;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 8px;
    font-size: 0.75rem;
    max-height: 150px;
    overflow-y: auto;
}

.booking-info .booking-details {
    line-height: 1.5;
}

.booking-info .booking-field {
    display: inline-block;
    margin-right: 8px;
}

.booking-info .booking-field b {
    color: rgba(255, 255, 255, 0.8);
}

.booking-info .no-booking {
    color: rgba(255, 200, 200, 0.9);
    font-style: italic;
}

/* Responsive */
@media (max-width: 640px) {
    body {
        padding: 0;
    }

    .chat-container {
        height: 100vh;
        max-height: none;
        border-radius: 0;
    }

    .message {
        max-width: 90%;
    }

    .chat-header {
        padding: 16px;
    }

    .chat-messages {
        padding: 16px;
    }

    .chat-input-area {
        padding: 12px 16px;
    }

    .user-selection-container {
        max-width: none;
        border-radius: 0;
        min-height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .user-selection-box {
        padding: 32px 20px;
    }

    .user-info {
        margin-left: 0;
        text-align: center;
    }
}