/* Importar fuentes de Google Fonts y Font Awesome para iconos */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&family=Lato:wght@300;400;700&display=swap');
@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0-beta3/css/all.min.css');

/* Variables CSS - Paleta Minimalista y Profesional */
:root {
    --color-bg-primary: #f8f9fa; /* Fondo principal muy claro */
    --color-bg-secondary: #ffffff; /* Blanco para secciones alternas y tarjetas */
    --color-text-primary: #212529; /* Texto oscuro para máxima legibilidad */
    --color-text-secondary: #6c757d; /* Gris para texto secundario */
    --color-accent: #007bff; /* Un solo color de acento, azul profesional */
    --color-border: #dee2e6; /* Bordes sutiles grises */
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08); /* Sombra elegante */
    
    --font-heading: 'Lato', sans-serif;
    --font-body: 'Roboto', sans-serif;
    --transition-speed: 0.3s ease-in-out;
}

/* Estilos Globales y Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.8;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 25px;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-speed);
}

a:hover {
    color: #0056b3; /* Tono más oscuro de azul al pasar el mouse */
}

/* Secciones Generales */
.section {
    padding: 120px 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.section:nth-of-type(even) {
    background-color: var(--color-bg-secondary);
}

.section-title {
    font-family: var(--font-heading);
    font-size: 3.5em;
    color: var(--color-text-primary);
    margin-bottom: 30px;
    font-weight: 700;
}

.subtitle {
    font-size: 1.2em;
    color: var(--color-text-secondary);
    margin-bottom: 40px;
    max-width: 800px;
    line-height: 1.6;
}

/* Header y Navegación */
.header {
    background-color: var(--color-bg-secondary);
    padding: 20px 0;
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 2em;
    font-weight: 700;
    color: var(--color-text-primary);
    text-decoration: none;
}
.logo a {
    color: inherit;
}

.nav-list {
    list-style: none;
    display: flex;
    gap: 30px;
}

.nav-link {
    color: var(--color-text-primary);
    text-decoration: none;
    font-size: 1em;
    font-weight: 500;
    position: relative;
    transition: color var(--transition-speed);
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    display: block;
    margin-top: 5px;
    right: 0;
    background: var(--color-accent);
    transition: width var(--transition-speed) cubic-bezier(0.85, 0, 0.15, 1);
}

.nav-link:hover::after {
    width: 100%;
    left: 0;
    background: var(--color-accent);
}

.nav-link:hover {
    color: var(--color-accent);
}

/* Botones */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 500;
    text-align: center;
    transition: all var(--transition-speed);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 1em;
}

.primary-btn {
    background-color: var(--color-accent);
    color: var(--color-bg-secondary);
    border: 2px solid var(--color-accent);
}

.primary-btn:hover {
    background-color: transparent;
    color: var(--color-accent);
}

.link-btn {
    background-color: transparent;
    border: 1px solid var(--color-text-secondary);
    color: var(--color-text-primary);
    padding: 10px 20px;
    font-size: 0.9em;
    border-radius: 5px;
    transition: all var(--transition-speed);
}

.link-btn:hover {
    background-color: var(--color-text-primary);
    color: var(--color-bg-secondary);
    border-color: var(--color-text-primary);
}

/* Sección Hero */
.hero {
    background-color: var(--color-bg-primary);
    padding-top: 150px;
}

.hero-text h2 {
    font-size: 4em;
    margin-bottom: 10px;
    font-weight: 700;
}

#typed-text-container {
    display: inline-block;
    font-size: 1.8em;
    font-family: var(--font-body);
    color: var(--color-accent);
    margin-bottom: 20px;
}

.cursor {
    display: inline-block;
    width: 2px;
    height: 1.2em;
    background-color: var(--color-accent);
    animation: blink 0.7s step-end infinite;
    vertical-align: middle;
    margin-left: 5px;
}

@keyframes blink {
    from, to { background-color: transparent; }
    50% { background-color: var(--color-accent); }
}

/* Sección Proyectos */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 60px;
    margin-top: 60px;
}

.project-card {
    background-color: var(--color-bg-secondary);
    border-radius: 8px;
    padding: 25px;
    box-shadow: var(--box-shadow);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.carousel-container {
    position: relative;
    width: 100%;
    height: 300px;
    margin-bottom: 25px;
    border-radius: 5px;
    overflow: hidden;
}

.carousel-slide {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-speed);
}
.carousel-slide.active { opacity: 1; }
.carousel-slide img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 5px;
}

.carousel-prev, .carousel-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.8);
    color: var(--color-text-primary);
    border: none;
    padding: 10px 15px;
    cursor: pointer;
    font-size: 1.2em;
    border-radius: 50%;
    transition: background-color var(--transition-speed);
}
.carousel-prev:hover, .carousel-next:hover {
    background-color: var(--color-accent);
    color: var(--color-bg-secondary);
}
.carousel-prev { left: 10px; }
.carousel-next { right: 10px; }

.project-info h3 {
    font-family: var(--font-heading);
    font-size: 2em;
    margin-bottom: 10px;
    color: var(--color-accent);
}

.project-info p {
    font-size: 1em;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}

.project-techs {
    margin-bottom: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.project-techs span {
    display: inline-flex;
    align-items: center;
    background-color: #e9ecef;
    color: var(--color-text-primary);
    font-size: 0.9em;
    padding: 8px 15px;
    border-radius: 20px;
    border: 1px solid var(--color-border);
}

.project-techs span i {
    margin-right: 8px;
    color: var(--color-accent);
}

.project-links {
    margin-top: 20px;
    display: flex;
    gap: 15px;
    justify-content: center;
}

/* Sección Habilidades */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 30px;
    margin-top: 50px;
    max-width: 900px;
}

.skill-item {
    background-color: var(--color-bg-secondary);
    padding: 25px;
    border-radius: 8px;
    box-shadow: var(--box-shadow);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.skill-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.skill-item i {
    font-size: 4em;
    color: var(--color-accent);
    margin-bottom: 15px;
}

.skill-item h4 {
    font-family: var(--font-heading);
    font-size: 1.2em;
    color: var(--color-text-primary);
    font-weight: 500;
}

/* Sección Certificados */
.certificate-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.certificate-card {
    background-color: var(--color-bg-secondary);
    border-radius: 8px;
    padding: 20px;
    box-shadow: var(--box-shadow);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    text-align: center;
}

.certificate-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.certificate-img {
    width: 100%;
    height: 250px;
    object-fit: contain;
    border-radius: 5px;
    margin-bottom: 15px;
    border: 1px solid var(--color-border);
}

.certificate-info h3 {
    font-family: var(--font-heading);
    font-size: 1.6em;
    color: var(--color-accent);
    margin-bottom: 15px;
}

.certificate-info .link-btn {
    margin-top: 10px;
}

/* Sección Contacto */
.contact-details {
    margin-top: 30px;
    margin-bottom: 40px;
    font-size: 1.1em;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact-details p i {
    margin-right: 10px;
    color: var(--color-accent);
}

.contact-details .contact-link {
    font-weight: 500;
}

.social-links {
    margin-top: 30px;
    display: flex;
    justify-content: center;
    gap: 25px;
}

.social-links a i {
    font-size: 2.5em;
    color: var(--color-text-primary);
    transition: color var(--transition-speed), transform var(--transition-speed);
}

.social-links a i:hover {
    color: var(--color-accent);
    transform: translateY(-5px);
}

/* Footer */
.footer {
    background-color: var(--color-bg-primary);
    color: var(--color-text-secondary);
    padding: 30px 0;
    font-size: 0.9em;
    text-align: center;
    border-top: 1px solid var(--color-border);
}

.footer p {
    margin-bottom: 5px;
}

.footer .fas {
    color: var(--color-accent);
}

/* Animaciones de aparición (Reveal Effect) con Intersection Observer */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }
.delay-6 { transition-delay: 0.6s; }
.delay-7 { transition-delay: 0.7s; }
.delay-8 { transition-delay: 0.8s; }
.delay-9 { transition-delay: 0.9s; }
.delay-10 { transition-delay: 1.0s; }
.delay-11 { transition-delay: 1.1s; }
.delay-12 { transition-delay: 1.2s; }
.delay-13 { transition-delay: 1.3s; }

/* Media Queries para Responsive Design */
@media (max-width: 992px) {
    .section-title { font-size: 2.8em; }
    .hero-text h2 { font-size: 3em; }
    .project-grid { grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); }
    .skills-grid { grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); }
}

@media (max-width: 768px) {
    .header .container { flex-direction: column; gap: 15px; }
    .section { padding: 90px 0; }
    .section-title { font-size: 2.2em; }
    .hero-text h2 { font-size: 2.5em; }
    #typed-text-container { font-size: 1.5em; }
    .project-grid { grid-template-columns: 1fr; }
    .project-info h3 { font-size: 1.8em; }
    .certificate-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .section-title { font-size: 1.8em; }
    .hero-text h2 { font-size: 2em; }
    .subtitle { font-size: 1em; }
    #typed-text-container { font-size: 1.2em; }
    .link-btn { width: 100%; }
}