/* Variables for light theme */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --accent-primary: #3da9fc;
    --accent-secondary: #e0f2fe;
    --accent-hover: #60a5fa;
    --border-color: #e2e8f0;
    --code-bg: #f1f5f9;
    --card-bg: #ffffff;
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    --btn-primary-bg: #93c5fd;
    --btn-primary-text: #1e40af;
    --btn-secondary-bg: rgba(147, 197, 253, 0.1);
    --btn-secondary-text: #1e40af;
    --highlight: #4ade80;
}

/* Variables for dark theme */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent-primary: #3b82f6;
    --accent-secondary: #1e293b;
    --accent-hover: #1e40af;
    --border-color: #334155;
    --code-bg: #1e293b;
    --card-bg: #1e293b;
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --btn-primary-bg: #0f3460;
    --btn-primary-text: #f1f5f9;
    --btn-secondary-bg: rgba(15, 52, 96, 0.3);
    --btn-secondary-text: #f1f5f9;
    --highlight: #4ade80;
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
    position: relative;
    overflow-x: hidden;
}

a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--accent-hover);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1rem;
    line-height: 1.2;
    font-weight: 700;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
}

.section-title {
    position: relative;
    display: inline-block;
    margin-bottom: 2rem;
    font-size: 2rem;
    font-weight: 700;
}

.section-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -0.5rem;
    width: 3rem;
    height: 0.25rem;
    background-color: var(--highlight);
    border-radius: 0.125rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 0.375rem;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    outline: none;
}

.btn i {
    margin-right: 0.5rem;
}

.btn.primary {
    background-color: var(--btn-primary-bg);
    color: var(--btn-primary-text);
}

.btn.primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

.btn.secondary {
    background-color: var(--btn-secondary-bg);
    color: var(--btn-secondary-text);
    border: 1px solid var(--btn-secondary-text);
}

.btn.secondary:hover {
    background-color: var(--btn-secondary-bg);
    transform: translateY(-2px);
}

/* Layout */
section {
    padding: 5rem 0;
}

.page-header {
    padding: 3rem 0;
    text-align: center;
    background-color: var(--bg-secondary);
}

.page-header h1 {
    margin-bottom: 1rem;
}

.page-header p {
    max-width: 600px;
    margin: 0 auto;
    color: var(--text-secondary);
}

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--bg-primary);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

header.scrolled {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    position: relative;
    font-weight: 500;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -0.25rem;
    left: 0;
    width: 0;
    height: 0.125rem;
    background-color: var(--highlight);
    transition: width 0.3s ease;
}

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

.nav-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}


.language-selector {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.language-selector a {
    font-weight: 500;
    color: var(--text-secondary);
}

.language-selector a.active {
    color: var(--text-primary);
    font-weight: 600;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 2rem;
    height: 1.5rem;
    background: transparent;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 100%;
    height: 0.125rem;
    background-color: var(--text-primary);
    transition: all 0.3s ease;
}

.mobile-menu {
    display: none;
    flex-direction: column;
    position: fixed;
    top: 4.5rem;
    left: 0;
    width: 100%;
    background-color: var(--bg-primary);
    padding: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    z-index: 999;
    transform: translateY(-100%);
    transition: transform 0.3s ease;
}

.mobile-menu.active {
    transform: translateY(0);
}

.mobile-menu a {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.mobile-menu a:last-child {
    border-bottom: none;
}

.mobile-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    margin-top: 1rem;
}

/* Main Content */
main {
    margin-top: 4.5rem;
    min-height: calc(100vh - 4.5rem - 15rem);
}

/* Hero Section */
.hero {
    padding: 5rem 0;
    background-color: var(--bg-primary);
}

.hero-content {
    display: flex;
    align-items: center;
    gap: 3rem;
}

.hero-text {
    flex: 1;
}

.welcome-text {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--highlight);
    margin-bottom: 0.5rem;
}

.name {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

.code-container {
    background-color: var(--code-bg);
    border-radius: 0.5rem;
    padding: 1.5rem;
    box-shadow: var(--card-shadow);
    overflow: hidden;
    width: 100%;
    max-width: 500px;
}

.code-container pre {
    margin: 0;
    font-family: 'Fira Code', monospace;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--text-primary);
    overflow-x: auto;
}

.code-container code {
    display: block;
}

/* About Cards */
.about-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 2rem;
}

.card {
    flex: 1;
    min-width: 250px;
    padding: 2rem;
    background-color: var(--card-bg);
    border-radius: 0.5rem;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    background-color: var(--accent-secondary);
    margin-bottom: 1rem;
}

.card-icon i {
    font-size: 1.5rem;
    color: var(--accent-primary);
}

.about-cta {
    text-align: center;
    margin-top: 2rem;
}

/* Project Section */
.projects-preview {
    background-color: var(--bg-secondary);
}

.project-card {
    display: flex;
    flex-direction: column; /* Default to column for all screens */
    background-color: var(--card-bg);
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    margin-bottom: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

/* Apply row direction only on larger screens */
@media (min-width: 769px) { /* Adjust breakpoint as needed */
    .project-card.featured {
        flex-direction: row;
    }
}

.project-image {
    flex: 1;
    min-height: 200px;
    background-color: var(--accent-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    color: var(--accent-primary);
}

.project-placeholder i {
    font-size: 4rem;
}

.project-info {
    flex: 2;
    padding: 2rem;
}

.project-info h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0;
}

.tag {
    padding: 0.25rem 0.75rem;
    background-color: var(--accent-secondary);
    color: var(--accent-primary);
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.projects-cta {
    text-align: center;
    margin-top: 2rem;
}

/* Learning Section */
.learning-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
}

.learning-card {
    flex: 1;
    min-width: 250px;
    padding: 2rem;
    background-color: var(--card-bg);
    border-radius: 0.5rem;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.learning-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.learning-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    background-color: var(--accent-secondary);
    margin-bottom: 1rem;
}

.learning-icon i {
    font-size: 1.5rem;
    color: var(--accent-primary);
}

/* Contact Preview */
.contact-preview {
    background-color: var(--bg-secondary);
    text-align: center;
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
}

.contact-content h2 {
    margin-bottom: 1rem;
}

.contact-content p {
    margin-bottom: 2rem;
    color: var(--text-secondary);
}

/* Projects Page */
.projects-grid {
    padding: 3rem 0;
    display: grid;
    grid-template-columns: 1fr; /* Single column by default */
    gap: 2rem; /* Spacing between grid items */
}

@media (min-width: 769px) {
    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(450px, 1fr)); /* Two columns on larger screens */
    }
}

.project-card {
    display: flex;
    flex-direction: column; /* Default to column for all screens */
    background-color: var(--card-bg);
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    /* margin-bottom: 2rem; REMOVED - gap handles spacing */
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card h2 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.project-card ul {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.project-card li {
    margin-bottom: 0.5rem;
}

.project-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.project-status {
    margin-top: 1rem;
}

.status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.status.in-progress {
    background-color: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
}

.status.planning {
    background-color: rgba(14, 165, 233, 0.1);
    color: #0ea5e9;
}

.status.completed {
    background-color: rgba(34, 197, 94, 0.1);
    color: #22c55e;
}

/* Collaboration Section */
.collaboration {
    text-align: center;
    background-color: var(--bg-primary);
    padding: 4rem 0;
}

.collaboration h2 {
    margin-bottom: 1rem;
}

.collaboration p {
    max-width: 700px;
    margin: 0 auto 2rem;
    color: var(--text-secondary);
}

/* Footer */
footer {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-info {
    flex: 2;
    min-width: 250px;
}

.footer-info h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.footer-info p {
    color: var(--text-secondary);
}

.footer-links {
    flex: 1;
    min-width: 150px;
}

.footer-links h4 {
    font-size: 1.125rem;
    margin-bottom: 1rem;
}

.footer-links a {
    display: block;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

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

.footer-social {
    flex: 1;
    min-width: 150px;
}

.footer-social h4 {
    font-size: 1.125rem;
    margin-bottom: 1rem;
}

.social-icons {
    display: flex;
    gap: 1rem;
}

.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background-color: var(--accent-secondary);
    color: var(--accent-primary);
    transition: all 0.3s ease;
}

.social-icons a:hover {
    background-color: var(--accent-primary);
    color: var(--bg-primary);
    transform: translateY(-3px);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0;
}

/* Particles.js container */
#particles-js {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1;
    pointer-events: none;
}

/* Media Queries */
@media (max-width: 992px) {
    .hero-content {
        flex-direction: column;
    }

    .hero-image {
        justify-content: center;
    }

    .code-container {
        max-width: 100%;
    }

    .project-card.featured {
        flex-direction: column;
    }

    .project-image {
        min-height: 250px;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    h3 {
        font-size: 1.25rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .nav-links, .nav-controls {
        display: none;
    }

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

    .mobile-menu {
        display: flex;
    }

    .name {
        font-size: 2.5rem;
    }

    .title {
        font-size: 1.25rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 2rem;
    }

    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 576px) {
    section {
        padding: 3rem 0;
    }

    .about-cards, .learning-cards {
        flex-direction: column;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 1rem;
    }

    .btn {
        width: 100%;
    }

    .name {
        font-size: 2rem;
    }
}


/* Certification section styles */
.certifications {
    background-color: var(--bg-secondary);
    padding: 4rem 0;
}

.certifications-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
}

.certification-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 2rem;
    background-color: var(--card-bg);
    border-radius: 0.5rem;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    flex: 1;
    min-width: 300px;
}

.certification-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.certification-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 4rem;
    height: 4rem;
    border-radius: 50%;
    background-color: var(--accent-secondary);
    flex-shrink: 0;
}

.certification-icon i {
    font-size: 2rem;
    color: var(--accent-primary);
}

.certification-content {
    flex: 1;
}

.certification-content h3 {
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

.certification-content p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.certification-content .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

@media (max-width: 768px) {
    .certification-item {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Scroll Animation Styles */
.card, .project-card, .learning-card {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.card.scrolled, .project-card.scrolled, .learning-card.scrolled {
    opacity: 1;
    transform: translateY(0);
}

/* Añadir al archivo CSS existente */
.status.completed {
    background-color: rgba(34, 197, 94, 0.1);
    color: #22c55e;
}

.project-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

/* Loading Overlay */
#loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

#loading-overlay.visible {
    opacity: 1;
    visibility: visible;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid var(--accent-primary);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Language Dropdown */
.language-dropdown-container {
    position: relative;
    display: inline-block;
    z-index: 100; /* Ensure dropdown is above other elements */
}

.language-display {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.3s ease, color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.language-display:hover {
    background-color: var(--accent-secondary);
}

.language-display i {
    transition: transform 0.3s ease;
}

.language-display.active i {
    transform: rotate(180deg);
}

.language-selector {
    display: flex;
    flex-direction: column;
    position: absolute;
    background-color: var(--card-bg);
    min-width: 120px;
    box-shadow: var(--card-shadow);
    border-radius: 0.375rem;
    padding: 0.5rem 0;
    z-index: 1;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
    right: 0; /* Align to the right */
    top: calc(100% + 0.5rem); /* Position below the button */
}

.language-selector.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-selector a {
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    text-decoration: none;
    display: block;
    font-weight: 400;
    transition: background-color 0.2s ease;
}

.language-selector a:hover {
    background-color: var(--bg-secondary);
    color: var(--accent-primary);
}

.language-selector a.active {
    background-color: var(--accent-secondary);
    color: var(--accent-primary);
    font-weight: 600;
}

/* Theme Switcher */
.theme-switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.theme-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-secondary);
    -webkit-transition: .4s;
    transition: .4s;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 8px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: var(--accent-primary);
    -webkit-transition: .4s;
    transition: .4s;
}

input:checked + .slider {
    background-color: var(--bg-secondary);
}

input:focus + .slider {
    box-shadow: 0 0 1px var(--accent-primary);
}

input:checked + .slider:before {
    -webkit-transform: translateX(26px);
    -ms-transform: translateX(26px);
    transform: translateX(26px);
}

/* Rounded sliders */
.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

.slider::after, .slider::before {
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    font-size: 1rem;
    position: absolute;
    color: white;
    transition: opacity 0.3s ease;
}

.slider::after {
    content: "\f185"; /* Sun icon */
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0;
    color: var(--text-primary); /* Changed to use text-primary variable */
}

.slider::before {
    content: "\f186"; /* Moon icon */
    position: absolute;
    left: 8px;
    top: 50%;
    transform: translateY(-50%);
    opacity: 1;
    color: var(--text-primary); /* Changed to use text-primary variable */
}

input:checked + .slider::after {
    opacity: 1;
}

input:checked + .slider::before {
    opacity: 0;
}

[data-theme="dark"] .slider::after {
    opacity: 1;
}

[data-theme="dark"] .slider::before {
    opacity: 0;
}