:root {
            /* Colores del logo */
            --primary-color: #1a1a1a; /* Negro carbón oscuro */
            --accent-color: #cc2910; /* Rojo Torii intenso */
            --bg-color: #faf9f6; /* Blanco roto / Crema del logo */
            --text-color: #333333;
            --light-text: #ffffff;
            --card-bg: #ffffff;
        }

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

        body {
            font-family: 'Roboto', 'Noto Sans JP', sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--bg-color);
            transition: all 0.3s ease;
        }

        /* Lógica para idiomas */
        body.lang-es [data-lang]:not([data-lang="es"]) { display: none !important; }
        body.lang-en [data-lang]:not([data-lang="en"]) { display: none !important; }
        body.lang-ja [data-lang]:not([data-lang="ja"]) { display: none !important; }

        /* Header & Nav - ACTUALIZADO PARA DESTACAR EL LOGO */
        header {
            background-color: var(--bg-color);
            padding: 15px 5%; /* Más espacio vertical para respirar */
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 15px rgba(0,0,0,0.05); /* Sombra un poco más pronunciada */
            border-bottom: 4px solid var(--primary-color);
        }

        .logo-container { 
            display: flex; 
            align-items: center; 
        }
        
        .logo-img { 
            height: 90px; /* Tamaño mucho más grande y protagonista */
            width: auto;
            display: block;
        }

        nav { display: flex; align-items: center; gap: 2rem; }
        nav ul { list-style: none; display: flex; gap: 2rem; }
        nav a { color: var(--primary-color); text-decoration: none; font-weight: 700; transition: color 0.3s; font-size: 1.05rem; }
        nav a:hover { color: var(--accent-color); }

        .lang-switcher { display: flex; gap: 5px; background: #e2e8f0; padding: 5px; border-radius: 4px; }
        .lang-btn { background: none; border: none; padding: 5px 10px; cursor: pointer; font-weight: 700; color: #64748b; border-radius: 3px; transition: all 0.2s; }
        .lang-btn.active { background: var(--primary-color); color: var(--light-text); }

        /* Hero Section */
        .hero {
            background: linear-gradient(135deg, #111111 0%, #2a2a2a 100%);
            color: var(--light-text);
            padding: 120px 5%;
            text-align: center;
            border-bottom: 5px solid var(--accent-color);
        }

        .hero h1 { font-size: 3.2rem; margin-bottom: 20px; line-height: 1.2; }
        .hero h2 { font-size: 1.5rem; font-weight: 300; margin-bottom: 40px; color: #cbd5e1; }

        .btn {
            display: inline-block;
            background-color: var(--accent-color);
            color: var(--light-text);
            padding: 14px 35px;
            text-decoration: none;
            border: none;
            border-radius: 4px;
            font-size: 1rem;
            font-weight: 700;
            cursor: pointer;
            transition: background-color 0.3s, transform 0.2s;
        }
        .btn:hover { background-color: #a6200c; transform: translateY(-2px); }

        /* Secciones */
        section { padding: 90px 5%; }
        .section-title { text-align: center; font-size: 2.2rem; color: var(--primary-color); margin-bottom: 50px; }
        .section-title::after {
            content: ''; display: block; width: 60px; height: 4px; background-color: var(--accent-color); margin: 15px auto 0;
        }

        /* Perfil */
        .about-grid {
            display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center;
            background: var(--card-bg); padding: 50px; border-radius: 8px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.05); border-left: 6px solid var(--accent-color);
        }

        /* Proyectos */
        .portfolio-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
        .project-card {
            background: var(--card-bg); border-radius: 8px; overflow: hidden;
            box-shadow: 0 4px 15px rgba(0,0,0,0.08); transition: transform 0.3s;
            display: flex; flex-direction: column; border: 1px solid #e2e8f0;
        }
        .project-card:hover { transform: translateY(-10px); box-shadow: 0 10px 25px rgba(0,0,0,0.12); }
        .project-header {
            background: var(--primary-color); color: white; padding: 25px 20px; text-align: center; border-bottom: 4px solid var(--accent-color);
        }
        .project-body { padding: 25px; flex-grow: 1; display: flex; flex-direction: column; }
        .tech-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
        .tag {
            background: var(--bg-color); color: var(--primary-color); font-size: 0.8rem;
            padding: 5px 12px; border-radius: 20px; font-weight: 700; border: 1px solid var(--primary-color);
        }
        .project-link {
            text-align: center; display: block; padding: 12px; background: var(--bg-color);
            color: var(--primary-color); text-decoration: none; font-weight: 700;
            border-radius: 4px; border: 2px solid var(--primary-color); transition: all 0.3s; margin-top: auto;
        }
        .project-link:hover { background: var(--primary-color); color: white; }

        /* Formulario de Contacto */
        .contact-form-container {
            max-width: 600px;
            margin: 0 auto;
            background: white;
            padding: 40px;
            border-radius: 8px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.08);
            border-top: 5px solid var(--accent-color);
        }
        .form-group { margin-bottom: 20px; text-align: left; }
        .form-group label {
            display: block; margin-bottom: 8px; font-weight: 700; color: var(--primary-color);
        }
        .form-group input, .form-group textarea {
            width: 100%; padding: 14px; border: 1px solid #cbd5e1; border-radius: 4px;
            font-family: inherit; font-size: 1rem;
        }
        .form-group input:focus, .form-group textarea:focus {
            outline: none; border-color: var(--accent-color);
        }

        /* Footer */
        footer {
            background-color: var(--primary-color); color: white; text-align: center;
            padding: 60px 5%; border-top: 6px solid var(--accent-color);
        }

        /* ========================================================
           DISEÑO RESPONSIVE (SMARTPHONES Y TABLETS)
           ======================================================== */
        @media (max-width: 768px) {
            header {
                flex-direction: column;
                gap: 20px;
                padding: 20px 5%;
            }
            .logo-img {
                height: 75px; /* En móvil se reduce un poco para no ocupar toda la pantalla */
            }
            nav {
                flex-direction: column;
                width: 100%;
                gap: 1.5rem;
            }
            nav ul {
                flex-wrap: wrap;
                justify-content: center;
                gap: 1rem;
            }
            .hero { padding: 80px 5% 60px; }
            .hero h1 { font-size: 2.2rem; }
            .hero h2 { font-size: 1.2rem; }
            .about-grid {
                grid-template-columns: 1fr;
                gap: 30px;
                text-align: center;
                padding: 30px;
            }
            .about-grid .about-text h3 { font-size: 1.5rem; }
            .section-title { font-size: 1.8rem; }
            .contact-form-container { padding: 25px; }
        }