/* Importamos la fuente de Google estilo consola de laboratorio */
@import url('https://fonts.googleapis.com/css2?family=Share+Tech+Mono&display=swap');

/* --- VARIABLES DE COLOR (Modo Oscuro por defecto) --- */
:root {
    --bg-color: #0d1117;
    --panel-bg: rgba(22, 27, 34, 0.95);
    --text-color: #c9d1d9;
    --primary-color: #58a6ff; /* Azul cyan tecnológico */
    --border-color: #30363d;
    --msg-user-bg: rgba(88, 166, 255, 0.1);
    --msg-bot-bg: #161b22;
    --hover-color: #1f6feb;
    --font-terminal: 'Share Tech Mono', monospace, sans-serif;
}

/* --- VARIABLES DE COLOR (Modo Claro) --- */
body:not(.dark-mode) {
    --bg-color: #eef3fb;
    --panel-bg: rgba(255, 255, 255, 0.95);
    --text-color: #24292f;
    --primary-color: #0969da;
    --border-color: #d0d7de;
    --msg-user-bg: rgba(9, 105, 218, 0.1);
    --msg-bot-bg: #ffffff;
    --hover-color: #033d8b;
}

/* --- BASE --- */
body {
    font-family: var(--font-terminal);
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    transition: background-color 0.3s, color 0.3s;
    overflow-x: hidden;
    /* Fondo de cuadrícula sutil tipo plano técnico */
    background-image: linear-gradient(var(--border-color) 1px, transparent 1px),
                      linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
    background-size: 40px 40px;
    background-position: center center;
}

/* --- BARRA SUPERIOR --- */
.top-bar {
    width: 95%;
    max-width: 1000px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 20px auto 10px auto;
    padding: 10px 20px;
    border-radius: 8px;
    background: var(--panel-bg);
    border-bottom: 2px solid var(--primary-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(5px);
}

.top-bar h2 {
    margin: 0;
    color: var(--primary-color);
    font-size: 1.5rem;
    letter-spacing: 1px;
}

.top-buttons { 
    display: flex; 
    gap: 15px; 
}

button {
    padding: 8px 15px;
    border-radius: 4px;
    border: 1px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    cursor: pointer;
    font-size: 1rem;
    font-family: var(--font-terminal);
    transition: all 0.3s ease;
}

button:hover { 
    background: var(--primary-color); 
    color: var(--bg-color);
    box-shadow: 0 0 10px var(--primary-color);
}

/* --- CONTENEDORES --- */
.main-container {
    width: 95%;
    max-width: 1000px;
    margin: 0 auto;
    height: 75vh;
}

.chat-container {
    height: 100%;
    background: var(--panel-bg);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(0,0,0,0.4);
    display: flex;
    flex-direction: column;
}

/* --- SIDEBAR --- */
.sidebar {
    position: fixed;
    top: 0;
    right: -350px;
    width: 320px;
    height: 100%;
    background: var(--panel-bg);
    border-left: 1px solid var(--primary-color);
    box-shadow: -5px 0 15px rgba(0,0,0,0.5);
    transition: 0.3s ease-in-out;
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

.sidebar.active { right: 0; }

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

.close-sidebar {
    background: none;
    border: none;
    color: inherit;
    font-size: 2rem;
    padding: 0;
}
.close-sidebar:hover { background: transparent; color: #ff5555; box-shadow: none; }

#lista-docs { overflow-y: auto; padding: 15px; }

.categoria-docs h4 {
    font-size: 0.9rem;
    color: var(--primary-color);
    margin: 15px 0 5px 0;
    border-bottom: 1px solid var(--border-color);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.categoria-docs ul { list-style: none; padding: 0; }

.categoria-docs li a {
    text-decoration: none;
    font-size: 0.95rem;
    color: var(--text-color);
    display: block;
    padding: 8px 0;
    transition: color 0.2s;
}

.categoria-docs li a:hover { 
    text-decoration: underline; 
    color: var(--primary-color);
}

/* --- CHAT --- */
#chat {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    /* Estilo de scrollbar técnico para webkit */
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

/* Estilo Terminal para los mensajes (adiós burbujas) */
.msg-user, .msg-bot { 
    padding: 12px 18px; 
    border-radius: 4px; 
    max-width: 85%; 
    line-height: 1.5; 
    font-size: 1.05rem;
}

.msg-user { 
    background: var(--msg-user-bg); 
    color: var(--primary-color); 
    align-self: flex-end; 
    border-right: 3px solid var(--primary-color);
}

.msg-bot { 
    background: var(--msg-bot-bg); 
    color: var(--text-color); 
    align-self: flex-start; 
    border-left: 3px solid var(--border-color);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--primary-color); /* Resalte visual */
}

.msg-bot.typing { 
    font-style: italic; 
    color: var(--text-color); 
}

/* --- INPUT --- */
.input-container { 
    display: flex; 
    gap: 10px; 
    margin-top: 15px; 
    align-items: center;
}

textarea {
    flex: 1;
    padding: 12px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.2); 
    color: var(--text-color);
    resize: none;
    font-size: 1.05rem;
    font-family: var(--font-terminal);
    outline: none;
    transition: border-color 0.3s;
}

body:not(.dark-mode) textarea {
    background: #ffffff;
}

textarea:focus {
    border-color: var(--primary-color);
}

/* Animación de carga */
.dots { animation: blink 1.4s infinite; margin: 0 2px; font-weight: bold; }
@keyframes blink { 0%, 100% { opacity: 0.2; } 20% { opacity: 1; } }

/* =========================================
   --- MEJORAS UI/UX AÑADIDAS AL FINAL ---
   ========================================= */

/* Scroll suave para el chat */
#chat {
    scroll-behavior: smooth;
}

/* Animación de Fade-In para los mensajes */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.msg-user, .msg-bot {
    animation: fadeIn 0.3s ease-out forwards;
    position: relative; /* Necesario para el botón de copiar flotante */
}

/* --- ESTILOS PARA EL MARKDOWN DE CELLECTIA --- */
.msg-bot p { margin-top: 0; margin-bottom: 10px; }
.msg-bot p:last-child { margin-bottom: 0; }
.msg-bot ul, .msg-bot ol { margin-top: 5px; padding-left: 20px; }
.msg-bot pre { 
    background: rgba(0,0,0,0.3); 
    padding: 10px; 
    border-radius: 4px; 
    overflow-x: auto; 
    border: 1px solid var(--border-color);
}
body:not(.dark-mode) .msg-bot pre { background: rgba(0,0,0,0.05); }
.msg-bot code { font-family: var(--font-terminal); color: var(--primary-color); font-weight: bold; }
.msg-bot pre code { color: inherit; font-weight: normal; }

/* --- BOTÓN DE COPIAR --- */
.btn-copiar {
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 5px 10px;
    font-size: 0.9rem;
    border-radius: 4px;
    cursor: pointer;
    opacity: 0; /* Oculto por defecto */
    transition: all 0.2s;
}

.msg-bot:hover .btn-copiar {
    opacity: 1; /* Aparece al pasar el ratón */
}

.btn-copiar:hover {
    background: var(--primary-color);
    color: var(--bg-color);
    border-color: var(--primary-color);
}

/* --- RESPONSIVE DESIGN (MÓVILES) --- */
@media screen and (max-width: 768px) {
    .top-bar { 
        flex-direction: column; 
        gap: 15px; 
        padding: 15px;
    }
    .top-buttons { 
        flex-wrap: wrap; 
        justify-content: center; 
        width: 100%;
    }
    .main-container { 
        height: 80vh; 
        padding: 10px; 
    }
    .sidebar { 
        width: 100%; 
        right: -100%; 
    } /* Ocupa toda la pantalla en móvil */
    .msg-user, .msg-bot { 
        max-width: 95%; 
    }
    .btn-copiar {
        opacity: 1; /* Siempre visible en móvil porque no hay 'hover' */
        top: 5px;
        right: 5px;
    }
}