/* --- Reset y Variables Globales --- */
:root {
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
    --page-bg: #f5f5f7;
    --chat-bg: #ffffff;
    --border-color: #e5e5e5;
    
    --user-msg-bg: #007aff;
    --user-msg-text: #ffffff;
    
    --assistant-msg-bg: #e9e9eb;
    --assistant-msg-text: #1d1d1f;

    --input-bg: #f0f0f0;
    --text-primary: #1d1d1f;
    --text-secondary: #6e6e73;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--page-bg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    gap: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

#settings-container {
    display: flex;
    gap: 10px;
    align-items: center;
    padding: 8px 16px;
    background-color: var(--chat-bg);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
    color: var(--text-secondary);
}

#ai-provider {
    font-family: var(--font-sans);
    font-size: 14px;
    padding: 5px 8px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--input-bg);
    color: var(--text-primary);
    outline: none;
    cursor: pointer;
}

#ai-provider:focus {
     box-shadow: 0 0 0 2px rgba(0,122,255,0.4);
}

/* --- Contenedor Principal del Chat --- */
#chat-container {
    width: 100%;
    max-width: 680px;
    height: 90vh;
    max-height: 800px;
    display: flex;
    flex-direction: column;
    background-color: var(--chat-bg);
    border-radius: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    overflow: hidden;
}

/* --- Caja de Mensajes --- */
#chat-box {
    flex-grow: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.message {
    padding: 12px 18px;
    border-radius: 18px;
    margin-bottom: 8px;
    max-width: 75%;
    line-height: 1.5;
    word-wrap: break-word;
}

/* Contenedor para el mensaje y sus fuentes */
.message-container {
    display: flex;
    flex-direction: column;
    margin-bottom: 10px;
}

/* Estilos para el contenedor de fuentes */
.sources-container {
    font-size: 0.8em;
    color: #888;
    margin-top: 5px;
    padding: 0 15px;
    max-width: 75%;
    align-self: flex-start; /* Se alinea con el mensaje del bot */
}

.sources-container strong {
    font-weight: 600;
}

.sources-container ul {
    list-style-type: none;
    padding-left: 10px;
    margin-top: 5px;
    margin-bottom: 0;
}

.source-item {
    font-family: monospace;
    font-size: 0.9em;
    padding: 2px 0;
}

.user-message {
    background-color: #007aff;
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 8px;
    max-width: 75%;
}

.message-container:has(.user-message) {
    align-items: flex-end;
}

.assistant-message {
    background-color: #e5e5ea;
    color: #333;
    align-self: flex-start;
    border-bottom-left-radius: 8px;
}

/* Estilo para el mensaje de "pensando" */
.assistant-message.thinking {
    color: #888;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% {
        opacity: 1;
    }
    50% {
        opacity: 0.6;
    }
    100% {
        opacity: 1;
    }
}

/* --- Estilos para contenido Markdown --- */
.assistant-message p {
    margin: 0 0 0.5em;
}
.assistant-message p:last-child {
    margin-bottom: 0;
}
.assistant-message ul, .assistant-message ol {
    padding-left: 20px;
    margin-bottom: 0.5em;
}
.assistant-message strong {
    font-weight: 600;
}
.assistant-message a {
    color: var(--user-msg-bg);
    text-decoration: none;
}
.assistant-message a:hover {
    text-decoration: underline;
}

/* --- Estilos para Bloques de Código --- */
.assistant-message pre {
    margin: 1em 0;
    border-radius: 12px;
    overflow: hidden;
}
.assistant-message pre code.hljs {
    padding: 16px;
    font-size: 0.9em;
    line-height: 1.6;
}

/* --- Contenedor de Entrada --- */
#input-container {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
}

#user-input {
    flex-grow: 1;
    border: none;
    background-color: var(--input-bg);
    border-radius: 20px;
    padding: 12px 18px;
    font-size: 16px;
    font-family: var(--font-sans);
    color: var(--text-primary);
    outline: none;
}
#user-input:focus {
    box-shadow: 0 0 0 2px rgba(0,122,255,0.4);
}

#send-btn {
    flex-shrink: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    border: none;
    background-color: var(--user-msg-bg);
    color: white;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.1s ease, background-color 0.2s ease;
}
#send-btn:hover {
    background-color: #0056b3;
}
#send-btn:active {
    transform: scale(0.9);
}

/* Scrollbar */
/* For Webkit-based browsers (Chrome, Safari) */
/* ... existing code ... */