/* Variables de color y tipografía */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --success-color: #2ecc71;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    
    --font-main: 'Roboto', sans-serif;
    --font-code: 'Source Code Pro', monospace;
    
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* Reset adicional */
.sem-header, .sem-footer {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Estilos del encabezado */
.sem-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 3rem 0;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
}

.sem-header::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 L0,100 Z" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></svg>');
    opacity: 0.5;
}

.sem-header .container {
    position: relative;
    z-index: 1;
}

.sem-header h1 {
    font-size: 2.5rem;
    margin: 1rem 0 0.5rem;
}

.sem-header .subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 800px;
    margin: 0 auto;
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.breadcrumb a {
    color: var(--light-color);
    text-decoration: none;
    transition: var(--transition);
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.breadcrumb span {
    opacity: 0.7;
}

/* Contenedor principal */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Estilos de secciones */
.content-section {
    margin-bottom: 3rem;
}

.content-section h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.8rem;
}

.content-section h2 i {
    color: var(--secondary-color);
}

/* Grid container para soluciones web */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
    transition: var(--transition);
    border-top: 4px solid var(--secondary-color);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.card h3 {
    color: var(--primary-color);
    margin-top: 0;
    margin-bottom: 1rem;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.tech-tags span {
    background: var(--light-color);
    padding: 0.25rem 0.5rem;
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--dark-color);
}

/* Sistema de pestañas */
.tabs {
    margin-bottom: 2rem;
}

.tab-header {
    display: flex;
    border-bottom: 1px solid #ddd;
    margin-bottom: 1rem;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: var(--transition);
    font-weight: 500;
    color: #666;
}

.tab-btn.active {
    color: var(--secondary-color);
    border-bottom-color: var(--secondary-color);
}

.tab-btn:hover:not(.active) {
    color: var(--primary-color);
    background: rgba(0, 0, 0, 0.03);
}

.tab-content {
    display: none;
    padding: 1rem;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.tab-content.active {
    display: block;
}

.tab-content ul {
    padding-left: 1.5rem;
}

.tab-content li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

/* Protocolos de red */
.protocol-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.protocol-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
    text-align: center;
    transition: var(--transition);
}

.protocol-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.protocol-icon {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.protocol-card h3 {
    color: var(--primary-color);
    margin-top: 0;
    margin-bottom: 1rem;
}

.protocol-animation {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--light-color);
    border-radius: var(--border-radius);
}

.dns-flow {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--dark-color);
    font-weight: 500;
}

.dns-flow i {
    color: var(--secondary-color);
}

.protocol-steps {
    display: flex;
    justify-content: space-between;
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--dark-color);
}

.protocol-steps span {
    padding: 0.25rem 0.5rem;
    background: rgba(52, 152, 219, 0.1);
    border-radius: 20px;
}

.http-methods {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.http-methods span {
    padding: 0.25rem 0.75rem;
    background: var(--light-color);
    border-radius: 20px;
    font-family: var(--font-code);
    font-weight: bold;
    font-size: 0.85rem;
}

.http-methods span:nth-child(1) {
    background: #61affe;
    color: white;
}
.http-methods span:nth-child(2) {
    background: #49cc90;
    color: white;
}
.http-methods span:nth-child(3) {
    background: #fca130;
    color: white;
}
.http-methods span:nth-child(4) {
    background: #f93e3e;
    color: white;
}

/* Roles en desarrollo */
.roles-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.role-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
    transition: var(--transition);
}

.role-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.role-header {
    padding: 1.5rem;
    color: white;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.role-header.frontend {
    background: linear-gradient(135deg, #3498db, #2980b9);
}

.role-header.backend {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
}

.role-header.fullstack {
    background: linear-gradient(135deg, #2ecc71, #27ae60);
}

.role-header h3 {
    margin: 0;
    font-size: 1.25rem;
}

.role-header i {
    font-size: 1.5rem;
}

.role-body {
    padding: 1.5rem;
}

.role-body ul {
    padding-left: 1.5rem;
    margin: 1rem 0 0;
}

.role-body li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

/* Sección de VS Code */
.vscode-section .intro {
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 2rem;
    color: #555;
}

.vscode-features {
    display: grid;
    gap: 2rem;
}

.feature {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
}

.feature h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--primary-color);
    margin-top: 0;
}

.feature h3 i {
    color: var(--secondary-color);
}

.code-examples {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.code-block {
    background: #f8f9fa;
    border-radius: var(--border-radius);
    padding: 1rem;
    border-left: 4px solid var(--secondary-color);
}

.code-block h4 {
    margin-top: 0;
    margin-bottom: 0.75rem;
    font-size: 1rem;
    color: var(--dark-color);
}

pre {
    margin: 0;
    background: #2d2d2d;
    padding: 1rem;
    border-radius: 4px;
    overflow-x: auto;
    color: #f8f8f2;
    font-family: var(--font-code);
    font-size: 0.9rem;
}

.code-result {
    margin-top: 0.75rem;
}

.show-result-btn {
    background: var(--secondary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-family: var(--font-main);
    transition: var(--transition);
}

.show-result-btn:hover {
    background: #2980b9;
}

/* Atajos de teclado */
.shortcuts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.shortcut-card {
    background: #f8f9fa;
    border-radius: var(--border-radius);
    padding: 1rem;
    text-align: center;
    transition: var(--transition);
}

.shortcut-card:hover {
    background: #e9ecef;
}

.shortcut-card kbd {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    background: white;
    border-radius: 4px;
    box-shadow: 0 2px 0 #ddd;
    font-family: var(--font-code);
    margin-bottom: 0.5rem;
}

.shortcut-card span {
    display: block;
    font-size: 0.9rem;
    color: #555;
}

/* Extensiones */
.extensions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.extension-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 1rem;
    border: 1px solid #eee;
    transition: var(--transition);
}

.extension-card:hover {
    border-color: var(--secondary-color);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.extension-card h4 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.extension-card p {
    margin: 0;
    font-size: 0.9rem;
    color: #666;
}

/* Resumen */
.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.summary-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
}

.summary-card h3 {
    color: var(--primary-color);
    margin-top: 0;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.summary-card ul {
    padding-left: 1.5rem;
    margin: 0;
}

.summary-card li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.key-concepts {
    border-top: 4px solid var(--secondary-color);
}

.tools {
    border-top: 4px solid var(--success-color);
}

.next-steps {
    border-top: 4px solid var(--warning-color);
}

/* Footer */
.sem-footer {
    background: var(--primary-color);
    color: white;
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.footer-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

.footer-nav a {
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

.footer-nav a:hover {
    color: var(--secondary-color);
}

.footer-copy {
    text-align: center;
    opacity: 0.8;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .sem-header h1 {
        font-size: 2rem;
    }
    
    .grid-container, .protocol-grid, .roles-container {
        grid-template-columns: 1fr;
    }
    
    .tab-header {
        flex-wrap: wrap;
    }
    
    .tab-btn {
        flex: 1 0 auto;
        text-align: center;
    }
}

/* Animaciones */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.content-section > article {
    animation: fadeIn 0.5s ease forwards;
}

.content-section > article:nth-child(1) { animation-delay: 0.1s; }
.content-section > article:nth-child(2) { animation-delay: 0.2s; }
.content-section > article:nth-child(3) { animation-delay: 0.3s; }
.content-section > article:nth-child(4) { animation-delay: 0.4s; }

/* Variables de color y tipografía - Tema CSS */
:root {
    --css-color: #2965f1;
    --css-light: #4d7ef7;
    --css-lighter: #8ab4ff;
    --css-dark: #1a4fc4;
    
    --flexbox-color: #2ecc71;
    --grid-color: #e74c3c;
    --animation-color: #9b59b6;
    
    --theme-light-bg: #ffffff;
    --theme-light-text: #333333;
    --theme-dark-bg: #1a1a1a;
    --theme-dark-text: #f0f0f0;
}

/* Estilos base */
.css-basics h2 i {
    color: var(--css-color);
}

.css-advanced h2 i {
    color: var(--css-dark);
}

/* Demostraciones interactivas */
.box-model-demo {
    border: 3px solid var(--css-color);
    padding: 2rem;
    margin: 1rem 0;
    position: relative;
    background-color: var(--light-color);
}

.box-model-demo::before {
    content: 'Margin';
    position: absolute;
    top: -1.5rem;
    left: 0;
    font-size: 0.8rem;
    color: var(--dark-color);
}

.box-content {
    background-color: var(--css-light);
    color: white;
    padding: 1rem;
    text-align: center;
    border: 2px dashed white;
}

.positioning-demo {
    height: 300px;
    border: 2px solid #ddd;
    margin: 1rem 0;
    position: relative;
    overflow: auto;
}

.position-box {
    padding: 0.5rem;
    color: white;
    font-weight: bold;
    text-align: center;
    margin: 0.5rem;
}

.static { background: var(--css-color); position: static; }
.relative { background: var(--flexbox-color); position: relative; top: 20px; left: 20px; }
.absolute { background: var(--grid-color); position: absolute; top: 50px; right: 20px; }
.fixed { background: var(--animation-color); position: fixed; bottom: 20px; right: 20px; }
.sticky { background: #f39c12; position: sticky; top: 0; }

/* Flexbox demo */
.flexbox-demo {
    display: flex;
    justify-content: space-around;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background-color: var(--light-color);
    margin: 1rem 0;
}

.flex-item {
    background-color: var(--flexbox-color);
    color: white;
    padding: 1rem;
    flex: 1;
    text-align: center;
    font-weight: bold;
}

/* Grid demo */
.grid-demo {
    display: grid;
    grid-template-columns: 1fr 3fr;
    grid-template-rows: auto 1fr auto;
    grid-template-areas:
        "header header"
        "sidebar main"
        "footer footer";
    gap: 0.5rem;
    height: 200px;
    margin: 1rem 0;
}

.grid-item {
    padding: 1rem;
    color: white;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
}

.header { grid-area: header; background: var(--grid-color); }
.sidebar { grid-area: sidebar; background: var(--css-color); }
.main { grid-area: main; background: var(--css-light); }
.footer { grid-area: footer; background: var(--css-dark); }

/* Animaciones */
.transition-demo {
    padding: 1rem;
    background: var(--css-color);
    color: white;
    text-align: center;
    margin: 1rem 0;
    transition: all 0.3s ease;
    cursor: pointer;
}

.transition-demo:hover {
    background: var(--grid-color);
    transform: scale(1.05);
}

.animation-demo {
    font-size: 2rem;
    text-align: center;
    margin: 1rem 0;
    animation: bounce 1s ease infinite alternate;
}

@keyframes bounce {
    from { transform: translateY(0); }
    to { transform: translateY(-20px); }
}

/* Demos avanzados */
.interactive-demo {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--light-color);
    border-radius: var(--border-radius);
}

.theme-box {
    height: 50px;
    margin-top: 1rem;
    background-color: var(--primary-color);
    transition: background-color 0.3s ease;
}

.responsive-grid-demo {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.responsive-grid-demo div {
    background: var(--css-light);
    color: white;
    padding: 1rem;
    text-align: center;
    border-radius: 4px;
}

.container-query-demo {
    resize: horizontal;
    overflow: auto;
    max-width: 100%;
    border: 2px dashed #ddd;
    padding: 1rem;
    margin-top: 1rem;
}

.cq-card {
    container-type: inline-size;
}

.cq-card .cq-image {
    height: 100px;
    background: var(--css-color);
}

.cq-card .cq-content {
    padding: 1rem 0;
}

@container (min-width: 350px) {
    .cq-card {
        display: flex;
        gap: 1rem;
    }
    
    .cq-card .cq-image {
        width: 150px;
        height: auto;
    }
}

.clip-path-demo {
    height: 150px;
    margin: 1rem 0;
    background: linear-gradient(45deg, var(--css-color), var(--grid-color));
    clip-path: polygon(0 0, 100% 0, 100% 75%, 0 100%);
}

.filter-demo {
    margin: 1rem 0;
    overflow: hidden;
}

.filter-demo img {
    width: 100%;
    transition: filter 0.3s ease;
}

.filter-demo:hover img {
    filter: hue-rotate(90deg) contrast(1.2);
}

/* Ejercicios de laboratorio */
.responsive-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius);
}

.gallery-item img {
    width: 100%;
    height: auto;
    transition: transform 0.3s ease;
}

.gallery-item:hover img {
    transform: scale(1.05);
}

.gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 0.5rem;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.gallery-item:hover .gallery-caption {
    transform: translateY(0);
}

.css-grid-dashboard {
    display: grid;
    grid-template-columns: 200px 1fr;
    grid-template-rows: 60px 1fr 60px;
    grid-template-areas:
        "header header"
        "nav main"
        "footer footer";
    height: 300px;
    gap: 0.5rem;
}

.dashboard-header {
    grid-area: header;
    background: var(--css-color);
    color: white;
    display: flex;
    align-items: center;
    padding: 0 1rem;
}

.dashboard-nav {
    grid-area: nav;
    background: var(--light-color);
    padding: 1rem;
}

.dashboard-main {
    grid-area: main;
    background: white;
    padding: 1rem;
    border: 1px solid #ddd;
}

.dashboard-footer {
    grid-area: footer;
    background: var(--css-dark);
    color: white;
    display: flex;
    align-items: center;
    padding: 0 1rem;
}

.advanced-effects {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.effect-card {
    padding: 1.5rem;
    color: white;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.clip-effect {
    background: var(--css-color);
    clip-path: polygon(0 0, 100% 0, 100% 85%, 0 100%);
}

.clip-effect:hover {
    clip-path: polygon(0 15%, 100% 0, 100% 100%, 0 100%);
}

.scroll-animation {
    background: var(--grid-color);
    animation: fadeIn 1s ease;
}

/* [Los estilos existentes para reflection y otros componentes permanecen iguales] */

/* Animaciones adicionales */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
/* Estilos para la sección de reflexión */
.reflection {
    margin: 3rem 0;
}

.reflection-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.reflection-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
}

.reflection-card h3 {
    padding: 1.5rem;
    margin: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--dark-color));
    color: white;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.reflection-text {
    padding: 1.5rem;
}

.reflection-text p:first-child {
    margin-top: 0;
}

.reflection-text ul {
    padding-left: 1.5rem;
}

.reflection-text li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}