/* Variables CSS */
:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-dark: #0f172a;
    
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
}

/* Reset y base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.5;
}

/* Layout principal */
.app-container {
    display: flex;
    height: 100vh;
    max-height: 100vh;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: 300px;
    background-color: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sidebar-header h2 i {
    color: var(--primary-color);
}

.new-chat-btn {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.new-chat-btn:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

/* Lista de conversaciones */
.conversations-list {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.conversation-item {
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid transparent;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.conversation-item:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--border-hover);
}

.conversation-item.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.conversation-title {
    font-weight: 500;
    font-size: 0.875rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
}

.conversation-date {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-top: 0.25rem;
}

.conversation-item.active .conversation-date {
    color: rgba(255, 255, 255, 0.8);
}

.conversation-delete {
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: var(--radius-sm);
    opacity: 0;
    transition: all 0.2s;
}

.conversation-item:hover .conversation-delete {
    opacity: 1;
}

.conversation-delete:hover {
    color: var(--danger-color);
    background-color: rgba(239, 68, 68, 0.1);
}

/* Footer del sidebar */
.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
}

.settings-btn {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.settings-btn:hover {
    background-color: var(--bg-secondary);
    border-color: var(--border-hover);
}

/* Contenido principal */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-primary);
}

.chat-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--bg-primary);
}

.chat-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.chat-actions {
    display: flex;
    gap: 0.5rem;
}

.delete-btn {
    padding: 0.5rem;
    background-color: transparent;
    color: var(--text-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s;
}

.delete-btn:hover {
    color: var(--danger-color);
    border-color: var(--danger-color);
    background-color: rgba(239, 68, 68, 0.05);
}

/* Contenedor del chat */
.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.welcome-message {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--text-secondary);
}

.welcome-message i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.welcome-message h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

/* Mensajes */
.message {
    display: flex;
    gap: 0.75rem;
    max-width: 80%;
    animation: fadeInUp 0.3s ease-out;
}

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

.message-avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

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

.message.assistant .message-avatar {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
}

.message-content {
    background-color: var(--bg-secondary);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    flex: 1;
}

.message.user .message-content {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.message-text {
    white-space: pre-wrap;
    word-wrap: break-word;
}

.message-time {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-top: 0.5rem;
}

.message.user .message-time {
    color: rgba(255, 255, 255, 0.7);
}

/* Contenedor de entrada */
.input-container {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-primary);
}

.input-wrapper {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
    max-width: 100%;
}

#message-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-family: inherit;
    font-size: 0.875rem;
    resize: none;
    min-height: 2.75rem;
    max-height: 8rem;
    background-color: var(--bg-primary);
    transition: all 0.2s;
}

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

.send-btn {
    padding: 0.75rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 2.75rem;
    height: 2.75rem;
}

.send-btn:hover:not(:disabled) {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

.send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    animation: fadeIn 0.2s ease-out;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 500px;
    animation: slideInUp 0.3s ease-out;
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-light);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

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

.modal-body {
    padding: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.api-key-input,
.model-select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.875rem;
    background-color: var(--bg-primary);
    transition: all 0.2s;
}

.api-key-input:focus,
.model-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group small {
    display: block;
    margin-top: 0.5rem;
    color: var(--text-light);
    font-size: 0.75rem;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
}

.save-btn {
    padding: 0.75rem 1.5rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.save-btn:hover {
    background-color: var(--primary-hover);
}

/* Loading overlay */
.loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.9);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.loading-overlay.show {
    display: flex;
}

.loading-spinner {
    text-align: center;
    color: var(--primary-color);
}

.loading-spinner i {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.loading-spinner p {
    font-weight: 500;
}

/* Bloques de código */
.code-block {
    margin: 1rem 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    background-color: var(--bg-dark);
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 1rem;
    background-color: rgba(15, 23, 42, 0.8);
    border-bottom: 1px solid var(--border-color);
}

.code-language {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.copy-code-btn {
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    transition: all 0.2s;
}

.copy-code-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
}

.code-content {
    margin: 0;
    padding: 1rem;
    background-color: var(--bg-dark);
    color: #e2e8f0;
    font-family: 'Fira Code', 'Monaco', 'Cascadia Code', 'Roboto Mono', monospace;
    font-size: 0.875rem;
    line-height: 1.5;
    overflow-x: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
    max-width: 100%;
}

.code-content code {
    background: none;
    padding: 0;
    color: inherit;
    font-family: inherit;
}

/* Código inline */
.inline-code {
    background-color: var(--bg-tertiary);
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    font-family: 'Fira Code', 'Monaco', 'Cascadia Code', 'Roboto Mono', monospace;
    font-size: 0.875em;
    color: var(--primary-color);
    border: 1px solid var(--border-color);
}

/* Cursor de escritura */
.typing-cursor {
    color: var(--primary-color);
    font-weight: bold;
    animation: blink 1s infinite;
}

.message.streaming .message-content {
    position: relative;
}

/* Estilo especial para código durante streaming */
.message.streaming .message-text {
    font-family: inherit;
}

.message.streaming .message-text code {
    background-color: var(--bg-tertiary);
    padding: 0.125rem 0.25rem;
    border-radius: 0.25rem;
    font-family: monospace;
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        max-height: 40vh;
    }
    
    .main-content {
        flex: 1;
        min-height: 60vh;
    }
    
    .message {
        max-width: 95%;
    }
    
    .modal-content {
        width: 95%;
        margin: 1rem;
    }
    
    .code-block {
        margin: 0.5rem 0;
    }
    
    .code-content {
        font-size: 0.75rem;
        padding: 0.75rem;
    }
    
    .code-header {
        padding: 0.375rem 0.75rem;
    }
}

/* Scrollbar personalizada */
.conversations-list::-webkit-scrollbar,
.chat-container::-webkit-scrollbar {
    width: 6px;
}

.conversations-list::-webkit-scrollbar-track,
.chat-container::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

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

.conversations-list::-webkit-scrollbar-thumb:hover,
.chat-container::-webkit-scrollbar-thumb:hover {
    background: var(--border-hover);
}