/* ==========================================================================
   1. VARIABLES Y TEMAS (CLARO Y OSCURO)
   ========================================================================== */
:root {
    --fondo-panel: #0a0a0b;
    --fondo-contenido: #121214;
    --fondo-tarjetas: #1a1a1e;
    --texto-principal: #ffffff;
    --texto-secundario: #888888;
    --acento: #e5e5e5;
    --borde: #222222;
    --sombra: rgba(0, 0, 0, 0.5);
    --error: #ff4a4a;
    --exito: #27c93f;
}

body.tema-claro {
    --fondo-panel: #ffffff;
    --fondo-contenido: #f5f5f7;
    --fondo-tarjetas: #ffffff;
    --texto-principal: #1d1d1f;
    --texto-secundario: #86868b;
    --acento: #0056b3; 
    --borde: #d2d2d7;
    --sombra: rgba(0, 0, 0, 0.08);
}

/* ==========================================================================
   2. RESETEO BÁSICO
   ========================================================================== */
* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; }
body { display: flex; min-height: 100vh; background-color: var(--fondo-contenido); color: var(--texto-principal); overflow-x: hidden; transition: background-color 0.4s ease, color 0.4s ease; }

/* ==========================================================================
   3. DISEÑO DE ESCRITORIO (PANTALLA DIVIDIDA)
   ========================================================================== */
.panel-lateral {
    width: 35%;
    background-color: var(--fondo-panel);
    height: 100vh;
    position: fixed;
    display: flex;
    flex-direction: column;
    padding: 4rem 3rem;
    border-right: 1px solid var(--borde);
    z-index: 50;
    transition: background-color 0.4s ease, border-color 0.4s ease;
}

.cabecera-lateral h1 { font-size: 3rem; line-height: 1.1; margin-bottom: 0.5rem; letter-spacing: 1px; font-weight: 600; }
.cabecera-lateral p { color: var(--texto-secundario); font-weight: 400; margin-bottom: 0; text-transform: uppercase; letter-spacing: 2px; font-size: 0.85rem; }

/* --- Navegación (BOTONES MASIVOS Y ABAJO) --- */
.navegacion-principal { display: flex; flex-direction: column; gap: 1.5rem; }

.btn-nav {
    background: none;
    border: none;
    text-align: left;
    font-size: 1.6rem; /* Botones mucho más grandes */
    font-weight: 700;  /* Letra super gruesa para destacar */
    color: var(--texto-secundario);
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
    padding: 12px 0;
}

.linea-indicadora {
    display: inline-block;
    width: 0;
    height: 4px; /* Línea mucho más notoria */
    background-color: var(--acento);
    margin-right: 0;
    transition: all 0.3s ease;
}

.btn-nav:hover .linea-indicadora, 
.btn-nav.activo .linea-indicadora {
    width: 40px; 
    margin-right: 15px;
}

.btn-nav:hover, 
.btn-nav.activo {
    color: var(--texto-principal);
    transform: translateX(8px);
}

.btn-descarga {
    margin-top: 1rem;
    display: inline-block;
    padding: 14px 28px;
    border: 2px solid var(--texto-secundario);
    text-decoration: none;
    color: var(--texto-secundario);
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 30px;
    text-align: center;
    transition: all 0.3s ease;
    width: max-content;
}

.btn-descarga:hover {
    background-color: var(--texto-principal);
    color: var(--fondo-panel);
    border-color: var(--texto-principal);
    transform: translateY(-2px);
}

.btn-admin-link {
    display: inline-block;
    color: var(--texto-secundario);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    padding: 12px 24px;
    border: 1px solid var(--borde);
    border-radius: 8px;
    transition: all 0.3s ease;
    text-align: left;
    background-color: transparent;
}

.btn-admin-link:hover {
    background-color: var(--fondo-tarjetas);
    color: var(--texto-principal);
    border-color: var(--acento);
    transform: translateY(-2px);
}

/* --- BOTÓN FLOTANTE TEMA CLARO/OSCURO (Garantizado Visible) --- */
.btn-flotante-tema {
    position: fixed;
    top: 2.5rem;
    right: 3.5rem;
    z-index: 9999; /* Máxima prioridad para que nada lo oculte */
    padding: 16px; /* Botón más grande */
    border-radius: 50%;
    background-color: var(--fondo-tarjetas);
    color: var(--texto-principal);
    border: 2px solid var(--borde); /* Borde más notorio */
    box-shadow: 0 4px 20px rgba(0,0,0,0.5);
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-flotante-tema:hover {
    transform: scale(1.15);
    border-color: var(--acento);
    box-shadow: 0 6px 25px rgba(0,0,0,0.8);
}

.icono-tema {
    width: 30px; /* Íconos grandotes para que destaquen */
    height: 30px;
}

.oculto { display: none !important; }

/* Panel Derecho Dinámico */
.panel-contenido { width: 65%; margin-left: 35%; padding: 4rem; min-height: 100vh; }
.menu-hamburguesa { display: none; }

/* ==========================================================================
   4. GALERÍA DE PROYECTOS Y DIBUJOS
   ========================================================================== */
.grid-galeria { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 2rem; margin-top: 2rem; }
.item-galeria { background-color: var(--fondo-tarjetas); border-radius: 10px; overflow: hidden; transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease; border: 1px solid var(--borde); display: flex; flex-direction: column; }
.item-galeria:hover { transform: translateY(-5px); box-shadow: 0 15px 30px var(--sombra); border-color: var(--texto-secundario); }
.item-galeria img { width: 100%; height: 250px; object-fit: cover; display: block; border-bottom: 1px solid var(--borde); }
.item-info { padding: 1.5rem; flex-grow: 1; display: flex; flex-direction: column; justify-content: center; }

/* ==========================================================================
   5. ANIMACIONES EXCLUSIVAS
   ========================================================================== */
.fade-in { animation: aparecer 0.4s ease-out forwards; } @keyframes aparecer { from { opacity: 0; } to { opacity: 1; } }
.anim-subir { animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards; } @keyframes slideUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
.anim-deslizar { animation: slideRight 0.5s ease-out forwards; } @keyframes slideRight { from { opacity: 0; transform: translateX(-30px); } to { opacity: 1; transform: translateX(0); } }
.anim-escala { animation: scaleIn 0.5s ease-out forwards; } @keyframes scaleIn { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); } }
.anim-enfoque { animation: blurIn 0.6s ease-out forwards; } @keyframes blurIn { from { opacity: 0; filter: blur(10px); } to { opacity: 1; filter: blur(0); } }

/* ==========================================================================
   6. RESPONSIVO MÓVIL
   ========================================================================== */
@media (max-width: 900px) {
    body { flex-direction: column; }
    .panel-lateral { width: 100%; height: auto; position: sticky; top: 0; padding: 1.5rem 2rem; border-right: none; border-bottom: 1px solid var(--borde); background: var(--fondo-panel); background-color: color-mix(in srgb, var(--fondo-panel) 90%, transparent); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
    .cabecera-lateral { display: flex; justify-content: space-between; align-items: center; }
    .cabecera-lateral h1 { font-size: 1.8rem; margin-bottom: 0; }
    .cabecera-lateral p { display: none; }
    .menu-hamburguesa { display: flex; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 5px; }
    .menu-hamburguesa span { width: 25px; height: 2px; background-color: var(--texto-principal); transition: 0.3s ease; border-radius: 2px; }
    .navegacion-principal { display: none; padding-top: 2rem; padding-bottom: 1rem; }
    .btn-nav { font-size: 1.5rem; padding: 10px 0; }
    .panel-contenido { width: 100%; margin-left: 0; padding: 2rem 1.5rem; min-height: calc(100vh - 80px); }
    .grid-galeria { grid-template-columns: 1fr; }
    
    .contenedor-inferior-lateral { margin-top: 2rem !important; }
    .btn-flotante-tema { top: 1.5rem; right: 5rem; padding: 10px; }
    .icono-tema { width: 20px; height: 20px; }
}

/* ==========================================================================
   7. MODAL DE IMAGEN (LIGHTBOX)
   ========================================================================== */

/* Cursor especial para indicar que la imagen se puede agrandar */
.imagen-ampliable {
    cursor: zoom-in;
}

/* Contenedor del fondo oscuro */
.modal {
    display: none; 
    position: fixed;
    /* Z-index exageradamente alto para tapar el panel lateral y el botón de tema */
    z-index: 99999; 
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    /* Fondo oscuro fijo sin importar si es tema claro u oscuro */
    background-color: rgba(0, 0, 0, 0.9); 
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

/* La imagen en grande */
.modal-contenido {
    margin: auto;
    display: block;
    max-width: 90%;
    max-height: 85vh; /* Evita que la imagen se salga del alto de la pantalla */
    margin-top: 7.5vh;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
    /* Reutilizamos tu animación 'scaleIn' para que aparezca suavemente */
    animation: scaleIn 0.3s ease-out forwards; 
}

/* El botón de cerrar (La X) */
.cerrar-modal {
    position: absolute;
    top: 20px;
    right: 40px;
    color: white;
    font-size: 50px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease, transform 0.3s ease;
    z-index: 100000;
}

/* Al pasar el mouse usamos tu variable de color rojo para los errores */
.cerrar-modal:hover {
    color: var(--error); 
    transform: scale(1.1);
}

/* Ajustes para que se vea bien en celular */
@media (max-width: 900px) {
    .modal-contenido {
        max-width: 95%;
        margin-top: 15vh;
    }
    .cerrar-modal {
        top: 10px;
        right: 20px;
        font-size: 40px;
    }
}