:root {
    /* Light Theme */
    --primary-color-light: #1A2735;
    --secondary-color-light: #F5F7FA;
    --accent-color-light: #1A2735;
    --background-color-light: #FFFFFF;
    --text-color-light: #505385;
    --input-background-light: #FFFFFF;
    --input-text-light: #1A2735;
    --hover-color-light: #2C3E50;
    --message-bg-light: #E5E9F0;
    --border-color-light: #1A2735;
    --welcome-user-color-light: #505385;
    --response-text-color-light: #505385;
    
    /* COLOR FUCSIA PARA EL ÉNFASIS */
    --emphasis-color-light: #FF00FF; 
    
    --link-color-light: #1A0DAB;
    --code-bg-light: #f4f4f4;
    --blockquote-bg-light: #f9f9f9;
    --blockquote-border-light: #ddd;

    /* Dark Theme */
    --primary-color-dark: #0A1829;
    --secondary-color-dark: #1A2735;
    --accent-color-dark: #0D1B2A;
    --background-color-dark: #0A1829;
    --text-color-dark: #E0E0E0;
    --input-background-dark: #1A2735;
    --input-text-dark: #FFE169;
    --hover-color-dark: #2C3E50;
    --message-bg-dark: #2C3E50;
    --border-color-dark: #1A2735;
    --welcome-user-color-dark: #A8E6CE;
    --response-text-color-dark: #A8E6CE;
    
    /* COLOR FUCSIA PARA EL ÉNFASIS OSCURO */
    --emphasis-color-dark: #FF00FF;
    
    --link-color-dark: #7FDBFF;
    --code-bg-dark: #2d2d2d;
    --blockquote-bg-dark: #1A2735;
    --blockquote-border-dark: #3d3d3d;

    --transition-speed: 0.3s;
    --header-height: 64px;
    --input-container-height: 100px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: var(--background-color-light);
    color: var(--text-color-light);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    font-size: 12px;
}

body.dark-theme {
    background: var(--background-color-dark);
    color: var(--text-color-dark);
}

.header {
    background: var(--primary-color-light);
    height: var(--header-height);
    padding: 1rem;
    color: #FFFFFF;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

body.dark-theme .header {
    background: var(--primary-color-dark);
}

.header-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    height: 100%;
}

.header h3 {
    font-size: 1.2rem;
    font-weight: 600;
}

.chat-interface {
    flex: 1;
    display: flex;
    flex-direction: column;
    max-width: 1200px;
    margin: var(--header-height) auto 0;
    width: 100%;
    padding: 1rem;
    height: calc(100vh - var(--header-height));
    position: relative;
}

.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    background: var(--secondary-color-light);
    border-radius: 12px;
    border: 2px solid var(--border-color-light);
    margin-bottom: var(--input-container-height);
    height: calc(100vh - var(--header-height) - var(--input-container-height) - 2rem);
}

body.dark-theme .chat-container {
    background: var(--secondary-color-dark);
    border-color: var(--border-color-dark);
}

.input-container {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    padding: 1rem;
    background: var(--background-color-light);
    height: var(--input-container-height);
    z-index: 1000;
}

body.dark-theme .input-container {
    background: var(--background-color-dark);
}

.input-wrapper {
    display: flex;
    align-items: center;
    background: var(--input-background-light);
    border: 2px solid var(--border-color-light);
    border-radius: 12px;
    padding: 0.5rem;
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
}

body.dark-theme .input-wrapper {
    background: var(--input-background-dark);
    border-color: var(--border-color-dark);
}

.prompt {
    flex: 1;
    padding: 0.75rem;
    border: none;
    background: transparent;
    color: var(--input-text-light);
    font-size: 1rem;
    outline: none;
}

body.dark-theme .prompt {
    color: var(--input-text-dark);
}

.action-buttons {
    display: flex;
    gap: 0.5rem;
    padding-right: 0.5rem;
}

.action-btn {
    background: transparent;
    border: none;
    color: var(--text-color-light);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.3s ease;
}

body.dark-theme .action-btn {
    color: var(--text-color-dark);
}

.action-btn:hover {
    background: var(--hover-color-light);
    color: #FFFFFF;
}

body.dark-theme .action-btn:hover {
    background: var(--hover-color-dark);
}

/* --- ESTILOS DE FORMATO DE MENSAJES (Markdown) --- */
.message-paragraphs {
    text-align: left;
    line-height: 1.6;
    color: var(--text-color-light);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

body.dark-theme .message-paragraphs {
    color: var(--text-color-dark);
}

.message-paragraphs p {
    margin-bottom: 15px;
}

.message-paragraphs h1 {
    color: var(--text-color-light);
    font-size: 1.5em;
    margin: 20px 0 15px;
    border-bottom: 2px solid var(--border-color-light);
    padding-bottom: 5px;
}

body.dark-theme .message-paragraphs h1 {
    color: var(--text-color-dark);
    border-bottom: 2px solid var(--border-color-dark);
}

.message-paragraphs h2 {
    color: var(--text-color-light);
    font-size: 1.3em;
    margin: 18px 0 13px;
    border-bottom: 1px solid var(--border-color-light);
    padding-bottom: 5px;
}

body.dark-theme .message-paragraphs h2 {
    color: var(--text-color-dark);
    border-bottom: 1px solid var(--border-color-dark);
}

.message-paragraphs h3 {
    color: var(--text-color-light);
    font-size: 1.1em;
    margin: 15px 0 10px;
}

body.dark-theme .message-paragraphs h3 {
    color: var(--text-color-dark);
}

/* REGLA PRINCIPAL PARA EL COLOR FUCSIA EN NEGRITAS */
.message-paragraphs strong {
    color: var(--emphasis-color-light);
    font-weight: bold;
}

body.dark-theme .message-paragraphs strong {
    color: var(--emphasis-color-dark);
}

.message-paragraphs em {
    color: var(--emphasis-color-light);
    font-style: italic;
}

body.dark-theme .message-paragraphs em {
    color: var(--emphasis-color-dark);
}

.message-paragraphs a {
    color: var(--link-color-light);
    text-decoration: underline;
}

body.dark-theme .message-paragraphs a {
    color: var(--link-color-dark);
}

.message-paragraphs ul,
.message-paragraphs ol {
    margin: 15px 0 15px 20px;
}

.message-paragraphs li {
    margin-bottom: 8px;
}

.message-paragraphs pre {
    background-color: var(--code-bg-light);
    border: 1px solid var(--border-color-light);
    border-radius: 4px;
    padding: 12px;
    overflow-x: auto;
    margin: 15px 0;
}

body.dark-theme .message-paragraphs pre {
    background-color: var(--code-bg-dark);
    border-color: var(--border-color-dark);
}

.message-paragraphs code {
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

.message-paragraphs blockquote {
    background: var(--blockquote-bg-light);
    border-left: 4px solid var(--blockquote-border-light);
    margin: 15px 0;
    padding: 10px 15px;
    font-style: italic;
}

body.dark-theme .message-paragraphs blockquote {
    background: var(--blockquote-bg-dark);
    border-left: 4px solid var(--blockquote-border-dark);
}

/* --- CONTENEDORES DE MENSAJES --- */
.message-box {
    padding: 1rem;
    border-radius: 12px;
    margin-bottom: 1rem;
    background: var(--message-bg-light);
    max-width: 85%;
}

body.dark-theme .message-box {
    background: var(--message-bg-dark);
}

.user-chat-box {
    margin-left: auto; /* Alineado a la derecha */
    background: var(--primary-color-light);
    color: #FFFFFF;
}

body.dark-theme .user-chat-box {
    background: var(--primary-color-dark);
}

.ai-chat-box {
    margin-right: auto; /* Alineado a la izquierda */
    color: var(--text-color-light);
    background: var(--message-bg-light);
}

body.dark-theme .ai-chat-box {
    color: var(--text-color-dark);
    background: var(--message-bg-dark);
}

/* Botones del encabezado */
.header-btn {
    background: transparent;
    border: none;
    color: #FFFFFF;
    cursor: pointer;
    padding: 0.5rem;
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.header-btn:hover {
    transform: scale(1.1);
}

/* Animación de carga */
.loading-box {
    display: flex;
    align-items: center;
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

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

@media (max-width: 768px) {
    :root {
        --header-height: 56px;
        --input-container-height: 80px;
    }

    .header h3 {
        font-size: 1rem;
    }

    .chat-interface {
        padding: 0.5rem;
    }

    .message-box {
        max-width: 90%;
    }

    .input-wrapper {
        flex-direction: row;
    }

    .action-buttons {
        padding-right: 0;
    }

    .action-btn {
        padding: 0.4rem;
    }
}

@media (max-width: 480px) {
    .header-actions {
        flex-direction: row;
        align-items: center;
    }

    .chat-container {
        padding: 0.5rem;
    }

    .message-box {
        max-width: 95%;
        padding: 0.75rem;
    }

    .message-paragraphs h1 {
        font-size: 1.3em;
    }

    .message-paragraphs h2 {
        font-size: 1.1em;
    }
}