/* --- RESET BÁSICO Y ESTILOS GLOBALES --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #BB86FC;
    --color-primary-dark: #8A2BE2;
    --color-secondary: #FF2E63;
    --color-accent: #03DAC6;
    --color-background: #121212;
    --color-surface: #1e1e1e;
    --color-surface-light: #2a2a2e;
    --color-text: #e0e0e0;
    --color-text-light: #f0f0f0;
    --color-text-muted: #b0b0b0;

    --transition-standard: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --shadow-light: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
    --shadow-regular: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
    --shadow-hover: 0 14px 28px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22);

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;

    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 20px;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--color-background);
    color: var(--color-text);
    line-height: 1.7;
    font-size: 16px;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(138, 43, 226, 0.05) 0%, transparent 20%),
        radial-gradient(circle at 90% 50%, rgba(255, 46, 99, 0.05) 0%, transparent 25%),
        radial-gradient(circle at 40% 80%, rgba(3, 218, 198, 0.05) 0%, transparent 15%);
    background-attachment: fixed;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

/* --- NAVEGACIÓN --- */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: rgba(18, 18, 18, 0.9);
    backdrop-filter: blur(8px);
    box-shadow: var(--shadow-light);
    transition: var(--transition-standard);
    padding: 0.8rem 0;
}

nav.scrolled {
    padding: 0.5rem 0;
    background-color: rgba(18, 18, 18, 0.95);
    box-shadow: var(--shadow-regular);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.nav-logo {
    font-weight: 700;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: var(--transition-standard);
}

.nav-logo:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-links a {
    color: var(--color-text);
    text-decoration: none;
    transition: var(--transition-standard);
    position: relative;
    padding: 0.3rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background: linear-gradient(to right, var(--color-primary), var(--color-secondary));
    transition: var(--transition-standard);
}

.nav-links a:hover {
    color: var(--color-primary);
}

.nav-links a:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 1.5rem;
    cursor: pointer;
}

/* --- ENCABEZADOS --- */
h1, h2, h3, h4 {
    margin-bottom: 0.8em;
    font-weight: 600;
}

h1 {
    font-size: 3.2em;
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: 0.2em;
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 1px;
}

.subtitle {
    text-align: center;
    font-size: 1.2em;
    color: var(--color-text-muted);
    margin-bottom: 2em;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

h2 {
    font-size: 2.2em;
    color: var(--color-primary);
    border-bottom: 2px solid var(--color-primary-dark);
    padding-bottom: 0.3em;
    margin-top: 1.5em;
    position: relative;
    display: inline-block;
}

h2::after {
    content: '';
    position: absolute;
    width: 50%;
    height: 2px;
    background: var(--color-secondary);
    bottom: -2px;
    left: 0;
}

h3 {
    font-size: 1.6em;
    color: var(--color-secondary);
    margin-top: 1em;
    position: relative;
    display: inline-block;
}

h3::before {
    content: '';
    position: absolute;
    width: 30px;
    height: 3px;
    background: var(--color-accent);
    bottom: -6px;
    left: 0;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease-out;
}

.project-card:hover h3::before {
    transform: scaleX(1);
}

/* --- HEADER --- */
header {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    padding-top: 60px;
    background: radial-gradient(circle at center, rgba(138, 43, 226, 0.1) 0%, transparent 70%);
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(138, 43, 226, 0.1) 0%, transparent 30%),
        radial-gradient(circle at 80% 20%, rgba(255, 46, 99, 0.1) 0%, transparent 30%);
    z-index: -1;
}

.header-content {
    max-width: 800px;
    padding: var(--spacing-md);
    position: relative;
    z-index: 2;
}

.profile-img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 4px solid var(--color-primary);
    margin: 0 auto var(--spacing-md) auto;
    animation: pulse 3s infinite;
    box-shadow: 0 0 15px rgba(187, 134, 252, 0.5);
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.profile-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(187, 134, 252, 0.7);
    }
    70% {
        box-shadow: 0 0 0 12px rgba(187, 134, 252, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(187, 134, 252, 0);
    }
}

.scroll-down {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 2rem;
    color: var(--color-primary);
    animation: float 2s ease-in-out infinite;
    cursor: pointer;
}

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

/* --- SECCIONES Y ARTÍCULOS --- */
main {
    margin-top: var(--spacing-xl);
}

section {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background-color: var(--color-surface);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-regular);
    transition: var(--transition-standard);
    position: relative;
    overflow: hidden;
}

section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: linear-gradient(to bottom, var(--color-primary), var(--color-secondary));
    opacity: 0.7;
}

section:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.section-bg {
    position: absolute;
    top: 0;
    right: 0;
    font-size: 15rem;
    opacity: 0.03;
    transform: translateY(-20%) translateX(20%);
    z-index: 0;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

article.project-card {
    background-color: var(--color-surface-light);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    border-left: 5px solid var(--color-secondary);
    box-shadow: var(--shadow-light);
    transition: var(--transition-standard);
    position: relative;
    z-index: 1;
    height: 100%;
    display: flex;
    flex-direction: column;
}

article.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-left: 5px solid var(--color-accent);
}

article.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(138, 43, 226, 0.05), rgba(255, 46, 99, 0.05));
    border-radius: var(--border-radius-md);
    z-index: -1;
    opacity: 0;
    transition: var(--transition-standard);
}

article.project-card:hover::before {
    opacity: 1;
}

.project-content {
    flex-grow: 1;
}

.project-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: var(--spacing-sm);
}

.stack-tag {
    background-color: rgba(138, 43, 226, 0.15);
    color: var(--color-primary);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.85em;
    transition: var(--transition-standard);
}

.stack-tag:hover {
    background-color: rgba(138, 43, 226, 0.3);
    transform: translateY(-2px);
}

.project-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.project-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background-color: rgba(3, 218, 198, 0.1);
    color: var(--color-accent);
    border-radius: 20px;
    text-decoration: none;
    transition: var(--transition-standard);
    font-size: 0.9em;
}

.project-link-btn:hover {
    background-color: rgba(3, 218, 198, 0.2);
    transform: translateY(-2px);
}

hr {
    border: 0;
    height: 1px;
    background-image: linear-gradient(to right, rgba(187, 134, 252, 0), rgba(187, 134, 252, 0.75), rgba(187, 134, 252, 0));
    margin: var(--spacing-lg) 0;
    opacity: 0.5;
}

/* --- PLACEHOLDER IMAGES --- */
.project-image {
    width: 100%;
    height: 180px;
    background: linear-gradient(45deg, #2d2d35, #3a3a45);
    color: #aaa;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-sm);
    margin: var(--spacing-sm) 0;
    font-style: italic;
    font-size: 0.9em;
    text-align: center;
    overflow: hidden;
    position: relative;
    transition: var(--transition-standard);
}

.project-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.05),
        transparent
    );
    transition: 0.5s;
}

.project-card:hover .project-image::before {
    left: 100%;
}

/* --- LISTAS --- */
ul {
    list-style-type: none;
    padding-left: 0;
}

ul li {
    margin-bottom: 0.5em;
    padding-left: 1.8em;
    position: relative;
    transition: var(--transition-standard);
}

ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 8px;
    background-color: var(--color-secondary);
    border-radius: 50%;
    transition: var(--transition-standard);
}

ul li:hover {
    transform: translateX(5px);
}

ul li:hover::before {
    background-color: var(--color-accent);
    box-shadow: 0 0 8px var(--color-accent);
}

/* --- CITAS --- */
.testimonials {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

blockquote {
    border-left: 4px solid var(--color-primary);
    margin: 0;
    padding: var(--spacing-md);
    background-color: rgba(42, 42, 46, 0.6);
    border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
    transition: var(--transition-standard);
    height: 100%;
    position: relative;
}

blockquote:hover {
    background-color: rgba(42, 42, 46, 0.9);
    transform: translateY(-5px);
    box-shadow: var(--shadow-light);
}

blockquote::before {
    content: '"';
    position: absolute;
    top: 10px;
    left: 10px;
    font-size: 3rem;
    color: rgba(187, 134, 252, 0.1);
}

blockquote p {
    font-style: italic;
    margin-bottom: 0.5em;
    position: relative;
    z-index: 1;
}

blockquote strong {
    display: block;
    font-style: normal;
    color: var(--color-secondary);
    margin-top: var(--spacing-xs);
}

/* --- CONTACTO --- */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.contact-card {
    background-color: var(--color-surface-light);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    transition: var(--transition-standard);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-light);
}

.contact-icon {
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    transition: var(--transition-standard);
}

.contact-card:hover .contact-icon {
    transform: scale(1.2);
    color: var(--color-accent);
}

.contact-info {
    margin-top: var(--spacing-xs);
}

.contact-info a {
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition-standard);
    position: relative;
    display: inline-block;
}

.contact-info a::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 1px;
    bottom: -2px;
    left: 0;
    background-color: var(--color-accent);
    transform: scaleX(0);
    transform-origin: bottom right;
    transition: transform 0.3s ease-out;
}

.contact-info a:hover {
    color: var(--color-primary);
}

.contact-info a:hover::after {
    transform: scaleX(1);
    transform-origin: bottom left;
}

/* --- BOTÓN "VOLVER ARRIBA" --- */
#scrollTopBtn {
    display: none;
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 99;
    border: none;
    outline: none;
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
    color: white;
    cursor: pointer;
    padding: 15px;
    border-radius: 50%;
    font-size: 18px;
    box-shadow: 0 4px 12px rgba(138, 43, 226, 0.4);
    transition: var(--transition-standard);
}

#scrollTopBtn:hover {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 6px 16px rgba(255, 46, 99, 0.5);
}

/* --- FOOTER --- */
footer {
    background-color: rgba(18, 18, 18, 0.8);
    padding: var(--spacing-md) 0;
    text-align: center;
    margin-top: var(--spacing-xl);
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(to right, 
        transparent, 
        rgba(138, 43, 226, 0.3), 
        rgba(255, 46, 99, 0.3), 
        rgba(3, 218, 198, 0.3), 
        transparent);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: var(--transition-standard);
}

.footer-links a:hover {
    color: var(--color-primary);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--color-text);
    font-size: 1.2rem;
    transition: var(--transition-standard);
}

.social-link:hover {
    background-color: var(--color-primary);
    color: #121212;
    transform: translateY(-5px);
}

.copyright {
    font-size: 0.9em;
    color: var(--color-text-muted);
}

/* --- SKILL SECTION --- */
.skills-container {
    margin-top: var(--spacing-lg);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.skill-category {
    background-color: var(--color-surface-light);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    border-left: 5px solid var(--color-accent);
    transition: var(--transition-standard);
    height: 100%;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.skill-category h4 {
    color: var(--color-primary);
    margin-bottom: 1em;
    font-size: 1.2em;
    display: flex;
    align-items: center;
    gap: 0.5em;
}
.skill-category h4 i {
    color: var(--color-accent);
}
.skills-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.skills-list li {
    position: relative;
    padding: 0.3em 0 0.3em 1.5em;
    color: var(--color-text);
    font-size: 0.95em;
    line-height: 1.5;
    transition: var(--transition-standard);
}
.skills-list li:hover {
    color: var(--color-primary);
    transform: translateX(5px);
}
.skills-list li::before {
    /*content: '→';*/
    position: absolute;
    left: 0;
    color: var(--color-accent);
    transition: var(--transition-standard);
    color: var(--color-secondary);
    font-weight: bold;
}

/* --- ANIMATIONS --- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.active {
    opacity: 1;
    transform: translateY(0);
}

/* --- RESPONSIVE DESIGN --- */
@media (max-width: 900px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background-color: rgba(18, 18, 18, 0.95);
        flex-direction: column;
        align-items: center;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-light);
        transform: translateY(-10px);
        opacity: 0;
        transition: var(--transition-standard);
    }

    .nav-links.active {
        display: flex;
        transform: translateY(0);
        opacity: 1;
    }

    .mobile-menu-btn {
        display: block;
    }

    .project-grid,
    .testimonials,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    section {
        padding: var(--spacing-md);
    }

    h1 {
        font-size: 2.5em;
    }

    .header-content {
        padding: var(--spacing-sm);
    }
}

@media (max-width: 600px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
    }

    h1 {
        font-size: 2em;
    }

    h2 {
        font-size: 1.8em;
    }

    h3 {
        font-size: 1.4em;
    }

    .container {
        padding: var(--spacing-sm);
    }

    .skill-bars {
        grid-template-columns: 1fr;
    }

    .section-bg {
        font-size: 10rem;
    }

    .project-image {
        height: 150px;
    }

    #scrollTopBtn {
        bottom: 20px;
        right: 20px;
        padding: 12px;
        font-size: 16px;
    }
}

/* --- PRELOADER --- */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-background);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.fade {
    opacity: 0;
    visibility: hidden;
}

.loader {
    width: 60px;
    height: 60px;
    border: 5px solid rgba(187, 134, 252, 0.2);
    border-radius: 50%;
    border-top-color: var(--color-primary);
    animation: spin 1s infinite ease-in-out;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}


/* --- BOTÓN PARA VOLVER --- (Añadir al final del archivo) --- */
.back-to-portfolio {
    display: inline-block;
    margin-top: var(--spacing-lg);
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
    color: var(--color-text-light);
    text-decoration: none;
    border-radius: 50px;
    transition: var(--transition-standard);
    font-weight: 600;
}

.back-to-portfolio:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
}

.back-to-portfolio i {
    margin-right: 8px;
}

/* --- ESTILOS PARA PÁGINA DE PROYECTO DETALLE --- */
#project-detail h2 {
    margin-bottom: var(--spacing-sm);
}

#project-detail .project-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(187, 134, 252, 0.2);
}

#project-detail .meta-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-text-muted);
}

#project-detail .meta-item i {
    color: var(--color-accent);
}

#project-detail .project-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

#project-detail .gallery-item {
    width: 100%;
    height: 200px;
    background-color: var(--color-surface-light);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-style: italic;
    color: var(--color-text-muted);
}