/* --- VARIABLES Y CONFIGURACIÓN BASE --- */
:root {
    --primary: #2563eb;
    --dark: #1e293b;
    --text: #475569;
    --bg: #f8fafc;
}

body { 
    font-family: 'Inter', sans-serif; 
    color: var(--text); 
    background: linear-gradient(-45deg, #f8fafc, #e2e8f0, #f1f5f9, #ffffff);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    margin: 0; 
    overflow-x: hidden; /* Evita scroll horizontal molesto */
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* --- NAVEGACIÓN --- */
.navbar { 
    background: white; 
    border-bottom: 1px solid #e2e8f0; 
    position: sticky; 
    top: 0; 
    z-index: 100; 
    padding: 1rem 0; 
}

.nav-container { 
    max-width: 900px; 
    margin: 0 auto; 
    display: flex; 
    justify-content: space-between; 
    padding: 0 1rem; 
    align-items: center; 
}

.logo { font-weight: 800; color: var(--dark); font-size: 1.2rem; }
.dot { color: var(--primary); }

.menu { 
    display: flex; 
    align-items: center; 
    gap: 1.2rem; 
}

.nav-link { 
    text-decoration: none; 
    color: var(--text); 
    font-size: 0.9rem; 
    font-weight: 600; 
    cursor: pointer; 
    transition: color 0.3s;
}

.nav-link.active { color: var(--primary); }

.nav-btn-download {
    text-decoration: none;
    background-color: var(--primary);
    color: white !important;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 700;
    transition: all 0.3s ease;
    margin-left: 10px;
}

.nav-btn-download:hover { background-color: var(--dark); }

/* --- CONTENIDO Y ANIMACIONES --- */
.tab-content { 
    display: none; 
    max-width: 900px; 
    margin: 3rem auto; 
    padding: 0 1rem; 
}

.tab-content.active {
    display: block;
    animation: aparecerSuave 0.8s ease forwards;
}

@keyframes aparecerSuave {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- HERO SECTION --- */
.hero-grid { 
    display: flex; 
    align-items: center; 
    gap: 3rem; 
    flex-wrap: wrap;
}

.hero-text { flex: 1; min-width: 300px; }
.hero-img { flex: 1; display: flex; justify-content: center; min-width: 300px; }

h1 { 
    font-size: 3.5rem; 
    color: var(--dark); 
    line-height: 1; 
    margin-bottom: 1.5rem; 
    letter-spacing: -1px;
}

.highlight { 
    background: linear-gradient(90deg, var(--primary), #6366f1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
}

.subtitle {
    font-size: 1.1rem;
    line-height: 1.6;
    border-left: 4px solid var(--primary);
    padding-left: 1.5rem;
    margin-bottom: 2rem;
}

.profile-pic { 
    width: 100%; 
    max-width: 400px; 
    height: 450px; 
    object-fit: cover; 
    border-radius: 30px; 
    border: 8px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.1); 
    animation: float 6s ease-in-out infinite;
    transition: all 0.4s ease;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0px); }
}

.profile-pic:hover {
    transform: scale(1.05) rotate(2deg);
    filter: brightness(1.1);
    box-shadow: 0 30px 60px rgba(37, 99, 235, 0.2);
}

/* --- CARDS Y GRIDS --- */
.card, .project-card, .contact-box { 
    background: white; 
    padding: 2rem; 
    border-radius: 12px; 
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05); 
    margin-bottom: 1rem; 
}

.portfolio-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); 
    gap: 20px; 
}

.tag { 
    background: #dbeafe; 
    color: var(--primary); 
    font-size: 0.7rem; 
    padding: 4px 8px; 
    border-radius: 4px; 
    font-weight: bold; 
    margin-right: 5px; 
}

.skills-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); 
    gap: 20px; 
}

.skill-card { 
    background: white; 
    padding: 1.5rem; 
    border-radius: 12px; 
    text-align: center; 
    transition: transform 0.3s;
}

.skill-card:hover { transform: translateY(-5px); }
.skill-card img { width: 50px; margin-bottom: 10px; }

/* --- FORMULARIOS Y BOTONES --- */
.form-group { margin-bottom: 1.5rem; }
.form-input { 
    width: 100%; 
    padding: 12px; 
    border: 1px solid #cbd5e1; 
    border-radius: 8px; 
    box-sizing: border-box; 
    font-family: inherit;
}

.btn-primary { 
    background: var(--primary); 
    color: white; 
    border: none; 
    padding: 15px 35px; 
    border-radius: 8px; 
    cursor: pointer; 
    font-weight: bold; 
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

.btn-primary:active { transform: scale(0.95); }

.portfolio-action {
    display: flex;
    justify-content: center;
    margin-top: 40px;
}

/* --- RESPONSIVE (CELULARES) --- */
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; text-align: center; }
    
    .hero-grid { flex-direction: column; text-align: center; gap: 2rem; }
    
    .subtitle { border-left: none; border-top: 4px solid var(--primary); padding: 1rem 0 0 0; }
    
    .profile-pic { max-width: 280px; height: 320px; }

    .menu {
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background: white;
        padding: 10px 0;
        justify-content: space-around;
        box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
        gap: 0;
    }

    .nav-btn-download { display: none; } /* Ocultamos el del navbar en celular para no amontonar */

    .tab-content { margin: 1.5rem auto 5rem auto; } /* Espacio extra abajo por el menú fix */

    .portfolio-grid, .skills-grid {
        grid-template-columns: 1fr;
    }
}