/* ============================================
   VARIABLES & RESET — mismos tokens del CSS base
============================================ */
:root {
    --color-bg:           #030712;
    --color-surface:      #111827;
    --color-surface-soft: #1f2937;
    --color-primary:      #3b82f6;
    --color-primary-glow: rgba(59, 130, 246, 0.5);
    --color-secondary:    #ff4500;
    --color-accent:       #f48024;
    --color-text-main:    #f9fafb;
    --color-text-dim:     #9ca3af;
    --color-glass:        rgba(255, 255, 255, 0.03);
    --color-border:       rgba(255, 255, 255, 0.1);
    --color-success:      #22c55e;
    --color-warning:      #eab308;

    --font-main: 'Courier New', 'Cascadia Code', monospace;
    --font-ui:   system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
    background-color: var(--color-bg);
    color: var(--color-text-main);
    font-family: var(--font-ui);
    line-height: 1.6;
    overflow-x: hidden;
    height: 100vh;
}

/* ============================================
   SCROLLBAR
============================================ */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.1);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

/* ============================================
   LAYOUT GRID — 3 columnas
============================================ */
.contenedor-app {
    display: grid;
    grid-template-columns: 260px 1fr 320px;
    height: 100vh;
    max-width: 1440px;
    margin: 0 auto;
}

/* ============================================
   BARRA LATERAL IZQUIERDA
============================================ */
.barra-lateral {
    background: var(--color-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-right: 1px solid var(--color-border);
    padding: 1.5rem;
    height: 100vh;
    position: sticky;
    top: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.logo-area {
    margin-bottom: 2rem;
}

.logo-area h1 {
    font-size: 1.4rem;
    font-weight: 800;
    background: linear-gradient(135deg, #fff 30%, #3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-family: var(--font-main);
    letter-spacing: -0.02em;
}

.logo-area p {
    font-size: 0.72rem;
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.12rem;
    margin-top: 0.25rem;
}

.titulo-seccion {
    color: var(--color-text-dim);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.12rem;
    font-weight: 700;
    margin: 1rem 0 0.5rem 0.25rem;
}

.item-nav {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 0.65rem 1rem;
    border-radius: 0.75rem;
    text-decoration: none;
    color: var(--color-text-main);
    font-size: 0.9rem;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}

.item-nav:hover {
    background: rgba(59, 130, 246, 0.1);
    color: var(--color-primary);
}

.item-nav.activo {
    background: rgba(59, 130, 246, 0.15);
    color: var(--color-primary);
    font-weight: 600;
}

.item-nav .icono-nav {
    font-size: 1.1rem;
    width: 22px;
    text-align: center;
}

.badge-nav {
    margin-left: auto;
    background: var(--color-primary);
    color: #fff;
    font-size: 0.65rem;
    font-weight: 700;
    padding: 0.1rem 0.45rem;
    border-radius: 999px;
}

/* ============================================
   FEED PRINCIPAL — área de código
============================================ */
.feed-principal {
    border-right: 1px solid var(--color-border);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

/* Topbar del feed */
.topbar-feed {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(3, 7, 18, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.topbar-feed h2 {
    font-size: 1rem;
    font-weight: 700;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    color: var(--color-text-dim);
    font-family: var(--font-main);
}

.breadcrumb span.sep { color: var(--color-border); }
.breadcrumb span.activo-bc { color: var(--color-primary); }

/* Acciones del archivo */
.acciones-archivo {
    display: flex;
    gap: 0.5rem;
}

.btn-accion {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.9rem;
    border-radius: 0.5rem;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text-dim);
    font-size: 0.78rem;
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font-ui);
}

.btn-accion:hover {
    background: var(--color-surface-soft);
    color: var(--color-text-main);
    border-color: rgba(255,255,255,0.2);
}

.btn-accion.copiado {
    border-color: var(--color-success);
    color: var(--color-success);
}

/* Pantalla de bienvenida */
.pantalla-bienvenida {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    color: var(--color-text-dim);
    padding: 3rem;
    text-align: center;
}

.icono-bienvenida {
    font-size: 4rem;
    opacity: 0.3;
    animation: flotacion 3s ease-in-out infinite;
}

@keyframes flotacion {
    0%, 100% { transform: translateY(0); }
    50%       { transform: translateY(-10px); }
}

.pantalla-bienvenida h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-text-main);
    opacity: 0.6;
}

.pantalla-bienvenida p {
    font-size: 0.88rem;
    max-width: 340px;
    line-height: 1.7;
}

/* Visor de código */
.visor-codigo {
    display: none;
    flex-direction: column;
    flex: 1;
}

.visor-codigo.visible {
    display: flex;
    animation: fadeIn 0.35s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Meta del archivo */
.meta-archivo {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: var(--color-surface);
}

.chip-lang {
    font-size: 0.72rem;
    font-weight: 700;
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    text-transform: uppercase;
    letter-spacing: 0.06rem;
    font-family: var(--font-main);
}

.chip-html  { background: rgba(240, 101, 41, 0.2); color: #f06529; border: 1px solid rgba(240, 101, 41, 0.3); }
.chip-css   { background: rgba(38, 77, 228, 0.2);  color: #264de4; border: 1px solid rgba(38, 77, 228, 0.3); }
.chip-js    { background: rgba(240, 219, 79, 0.2); color: #f0db4f; border: 1px solid rgba(240, 219, 79, 0.3); }

.meta-info {
    display: flex;
    gap: 1.5rem;
    font-size: 0.78rem;
    color: var(--color-text-dim);
    margin-left: auto;
}

.meta-info span { display: flex; align-items: center; gap: 0.35rem; }

/* Descripción */
.descripcion-archivo {
    padding: 1rem 1.5rem 0;
    font-size: 0.88rem;
    color: var(--color-text-dim);
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 1rem;
}

.descripcion-archivo strong {
    color: var(--color-text-main);
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.95rem;
}

/* Bloque de código con highlight.js */
.contenedor-codigo {
    flex: 1;
    overflow: auto;
    background: #1a1d23;
}

.contenedor-codigo pre {
    margin: 0;
    padding: 0;
    height: 100%;
}

.contenedor-codigo pre code {
    display: block;
    padding: 1.5rem !important;
    font-family: 'Courier New', 'Cascadia Code', 'Fira Code', monospace !important;
    font-size: 0.88rem !important;
    line-height: 1.7 !important;
    background: transparent !important;
    counter-reset: linea;
}

/* Líneas numeradas */
.contenedor-codigo pre code .linea {
    display: block;
    position: relative;
    padding-left: 3.5rem;
    min-height: 1.4em;
}

.contenedor-codigo pre code .linea::before {
    counter-increment: linea;
    content: counter(linea);
    position: absolute;
    left: 0;
    width: 2.8rem;
    text-align: right;
    padding-right: 1rem;
    color: rgba(255,255,255,0.2);
    user-select: none;
    font-size: 0.8em;
}

/* ============================================
   PANEL DERECHO — Explorador de carpetas
============================================ */
.panel-explorador {
    background: var(--color-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    height: 100vh;
    position: sticky;
    top: 0;
    overflow-y: auto;
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.explorador-titulo {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.12rem;
    color: var(--color-text-dim);
    font-weight: 700;
    padding: 0 0.5rem;
}

/* Carpeta desplegable */
.carpeta {
    border: 1px solid var(--color-border);
    border-radius: 0.85rem;
    overflow: hidden;
    background: var(--color-surface);
    transition: border-color 0.2s;
}

.carpeta.abierta {
    border-color: rgba(59, 130, 246, 0.3);
}

.cabecera-carpeta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.85rem 1rem;
    cursor: pointer;
    user-select: none;
    transition: background 0.2s;
}

.cabecera-carpeta:hover {
    background: rgba(255,255,255,0.04);
}

.icono-carpeta {
    font-size: 1.1rem;
    transition: transform 0.25s ease;
}

.carpeta.abierta .icono-carpeta {
    transform: rotate(0deg);
}

.nombre-carpeta {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-text-main);
    flex: 1;
    font-family: var(--font-main);
}

.flecha-carpeta {
    font-size: 0.65rem;
    color: var(--color-text-dim);
    transition: transform 0.25s ease;
}

.carpeta.abierta .flecha-carpeta {
    transform: rotate(90deg);
}

/* Contenido de la carpeta (lista de archivos) */
.contenido-carpeta {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(0,0,0,0.2);
    border-top: 0px solid transparent;
}

.carpeta.abierta .contenido-carpeta {
    max-height: 600px;
    overflow-y: auto;
    border-top: 1px solid var(--color-border);
}

/* Item de archivo individual */
.item-archivo {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.6rem 0.75rem 0.6rem 1.25rem;
    cursor: pointer;
    transition: all 0.15s;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    text-decoration: none;
}

.item-archivo:last-child { border-bottom: none; }

.item-archivo:hover {
    background: rgba(59, 130, 246, 0.08);
}

.item-archivo.activo {
    background: rgba(59, 130, 246, 0.15);
    border-left: 2px solid var(--color-primary);
    padding-left: 1.1rem;
}

.icono-archivo {
    font-size: 0.9rem;
    flex-shrink: 0;
}

.datos-archivo {
    flex: 1;
    min-width: 0;
}

.nombre-archivo {
    font-size: 0.82rem;
    font-family: var(--font-main);
    color: var(--color-text-main);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: block;
}

.item-archivo.activo .nombre-archivo { color: var(--color-primary); }

.ext-archivo {
    font-size: 0.68rem;
    color: var(--color-text-dim);
    margin-top: 0.05rem;
}

.tamano-archivo {
    font-size: 0.68rem;
    color: var(--color-text-dim);
    font-family: var(--font-main);
    flex-shrink: 0;
}

/* Tarjeta de estadísticas en el panel */
.tarjeta-stats {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 0.85rem;
    padding: 1rem;
}

.tarjeta-stats h4 {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.1rem;
    color: var(--color-text-dim);
    margin-bottom: 0.85rem;
    font-weight: 700;
}

.fila-stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.65rem;
}

.fila-stat:last-child { margin-bottom: 0; }

.etiq-stat { font-size: 0.8rem; color: var(--color-text-dim); }

.val-stat {
    font-size: 0.82rem;
    font-weight: 700;
    font-family: var(--font-main);
}

.val-html { color: #f06529; }
.val-css  { color: #264de4; }
.val-js   { color: #f0db4f; }

/* ============================================
   ANIMACIONES
============================================ */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

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

.cursor-terminal {
    display: inline-block;
    width: 8px;
    height: 1em;
    background: var(--color-primary);
    vertical-align: middle;
    margin-left: 2px;
    animation: parpadeo 1s step-end infinite;
}