/* Modern Chat Interface Styles */

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

:root {
    --bg-primary: #f7f7f8;
    --bg-secondary: #ffffff;
    --bg-tertiary: #ececf1;
    --text-primary: #2e2e2e;
    --text-secondary: #6e6e80;
    --accent: #10a37f;
    --accent-hover: #0e8c6f;
    --border: #e5e5e5;
    --success: #10b981;
    --message-user: #10a37f;
    --message-ai: #f7f7f8;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
}

/* Sidebar Styles */
.sidebar {
    width: 260px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border);
}

.sidebar-header h1 {
    font-size: 20px;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #10a37f, #1a7f64);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.new-chat-btn {
    width: 100%;
    padding: 10px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 14px;
    transition: all 0.2s;
}

.new-chat-btn:hover {
    background: var(--accent);
    border-color: var(--accent);
}

.chat-history {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
}

.chat-item {
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
    transition: all 0.2s;
    margin-bottom: 5px;
}

.chat-item:hover {
    background: var(--bg-tertiary);
}

.chat-item.active {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border);
}

.model-info {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Main Content Styles */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
}

.chat-header {
    padding: 20px 30px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-header h2 {
    font-size: 18px;
    font-weight: 500;
}

.clear-btn {
    padding: 8px 16px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.clear-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 30px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.welcome-message {
    text-align: center;
    padding: 60px 20px;
    max-width: 600px;
    margin: auto;
}

.welcome-message h2 {
    font-size: 32px;
    margin-bottom: 15px;
}

.welcome-message p {
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: 10px;
}

.welcome-message .note {
    font-size: 14px;
    color: #64748b;
    font-style: italic;
}

/* Message Styles */
.message {
    display: flex;
    gap: 15px;
    animation: slideIn 0.3s ease-out;
}

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

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-weight: 600;
    font-size: 14px;
}

.message.user .message-avatar {
    background: var(--message-user);
}

.message.ai .message-avatar {
    background: var(--message-ai);
}

.message-content {
    flex: 1;
    max-width: 800px;
}

.message-text {
    padding: 15px 18px;
    border-radius: 12px;
    line-height: 1.6;
    font-size: 15px;
}

.message.user .message-text {
    background: var(--bg-tertiary);
}

.message.ai .message-text {
    background: var(--bg-secondary);
}

.message.user .message-text {
    background: var(--message-user);
}

.message-timestamp {
    font-size: 12px;
    color: #64748b;
    margin-top: 5px;
}

.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 15px 18px;
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--text-secondary);
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

.typing-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.7;
    }
    30% {
        transform: translateY(-10px);
        opacity: 1;
    }
}

/* Input Container */
.input-container {
    padding: 20px 30px;
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
}

.input-wrapper {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    gap: 10px;
    align-items: flex-end;
}

#userInput {
    flex: 1;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 15px;
    font-family: inherit;
    resize: none;
    max-height: 200px;
    line-height: 1.5;
}

#userInput:focus {
    outline: none;
    border-color: var(--accent);
}

#userInput::placeholder {
    color: #64748b;
}

.send-btn {
    width: 44px;
    height: 44px;
    background: var(--accent);
    border: none;
    border-radius: 12px;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    flex-shrink: 0;
}

.send-btn:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: scale(1.05);
}

.send-btn:disabled {
    background: var(--bg-tertiary);
    cursor: not-allowed;
    opacity: 0.5;
}

/* Scrollbar Styles */
.chat-container::-webkit-scrollbar,
.chat-history::-webkit-scrollbar {
    width: 6px;
}

.chat-container::-webkit-scrollbar-track,
.chat-history::-webkit-scrollbar-track {
    background: transparent;
}

.chat-container::-webkit-scrollbar-thumb,
.chat-history::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

.chat-container::-webkit-scrollbar-thumb:hover,
.chat-history::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .sidebar {
        position: absolute;
        left: -260px;
        height: 100vh;
        z-index: 100;
        transition: left 0.3s;
    }

    .sidebar.open {
        left: 0;
    }

    .chat-header h2 {
        font-size: 16px;
    }

    .welcome-message h2 {
        font-size: 24px;
    }
}