/* Modern Portfolio CSS for Gabriel Hurtado */

:root {
    /* Colors */
    --primary-color: #2563eb;
    --primary-light: #3b82f6;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --accent-color: #10b981;
    --accent-light: #34d399;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    /* Spacing */
    --section-padding: 100px 0;
    --container-padding: 0 20px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--white);
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.3;
    color: var(--gray-900);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: var(--font-weight-extrabold);
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-500);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Layout */
.section-padding {
    padding: var(--section-padding);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--container-padding);
}

/* Sections - Fix stacking context */
section {
    position: relative;
    z-index: 1;
    background: var(--white);
}

section.bg-light {
    background: var(--gray-50) !important;
}

/* Language Switch Button */
.language-switch {
    margin-left: 1rem;
}

.language-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    color: var(--gray-600);
    text-decoration: none;
    transition: var(--transition-fast);
}

.language-btn:hover {
    background: var(--gray-50);
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-1px);
}

.flag-icon {
    font-size: 1rem;
}

/* Responsive para el botón de idioma */
@media (max-width: 768px) {
    .language-switch {
        margin-left: 0;
        margin-top: 1rem;
        text-align: center;
    }
    
    .language-btn {
        justify-content: center;
        width: 100px;
    }
}

/* Navigation - Fix z-index issues */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gray-200);
    transition: var(--transition-normal);
    padding: 1rem 0;
    z-index: 1030;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.navbar-brand .brand-text {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--gray-900);
    text-decoration: none;
}

.navbar-nav .nav-link {
    font-weight: var(--font-weight-medium);
    color: var(--gray-600);
    padding: 0.5rem 1rem;
    margin: 0 0.25rem;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    position: relative;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--primary-color);
    background-color: var(--gray-50);
}

/* Carrusel de imágenes para proyectos */
.project-image-carousel {
    position: relative;
    height: 250px;
    overflow: hidden;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.carousel-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.carousel-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.carousel-image.active {
    opacity: 1;
}

/* Indicadores del carrusel */
.carousel-indicators {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 5px;
    z-index: 3;
}

.indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.indicator.active {
    background: var(--white);
}

/* Overlay mejorado para 3 botones */
.project-overlay .project-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
}

/* Botón de preview deshabilitado */
.btn.disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

.btn.disabled small {
    font-size: 0.6rem;
    opacity: 0.8;
    margin-top: -2px;
}

/* Badges de tecnología */
.tech-badge.docker { 
    background: #2496ed; 
    color: var(--white); 
}

.tech-badge.i18n { 
    background: #6366f1; 
    color: var(--white); 
}

/* Animación de hover para el carrusel */
.project-card:hover .carousel-image.active {
    transform: scale(1.05);
}

/* Responsive para el carrusel */
@media (max-width: 768px) {
    .project-overlay .project-links {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 0.25rem;
    }
    
    .btn {
        font-size: 0.75rem;
        padding: 0.5rem 0.75rem;
    }
    
    .btn small {
        font-size: 0.5rem;
    }
}

/* Mejorar espaciado para 2 columnas */
@media (min-width: 992px) {
    .projects-section .col-lg-6 {
        padding-left: 15px;
        padding-right: 15px;
    }
    
    .project-card {
        height: 100%;
        min-height: 450px;
    }
}

/* Ajustar altura del carrusel para mejor proporción */
.project-image-carousel {
    height: 280px;
}

.project-image {
    height: 280px;
}

/* Hero Section - Fix overlap issues */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    z-index: 1;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    z-index: -2;
}

.hero-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.5;
    background-image: 
        radial-gradient(circle at 25% 25%, var(--primary-color) 1px, transparent 1px),
        radial-gradient(circle at 75% 75%, var(--accent-color) 1px, transparent 1px);
    background-size: 60px 60px;
    background-position: 0 0, 30px 30px;
    z-index: -1;
}

.hero-content {
    z-index: 2;
    position: relative;
}

.hero-badge {
    display: inline-flex !important;
    align-items: center;
    gap: 0.5rem;
    background-color: #10b981 !important;
    color: #ffffff !important;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    margin-bottom: 2rem;
    opacity: 1 !important;
    visibility: visible !important;
    display: inline-flex;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: var(--font-weight-extrabold);
    line-height: 1.1;
    margin-bottom: 1rem;
    color: var(--gray-900);
}

.highlight {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: var(--font-weight-medium);
    color: var(--gray-600);
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--gray-500);
    margin-bottom: 2rem;
    max-width: 500px;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    padding: 1.5rem;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transform: translateZ(0);
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-500);
    font-weight: var(--font-weight-medium);
}

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

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: 2;
}

.image-container {
    position: relative;
}

.profile-img {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--white);
    box-shadow: var(--shadow-xl);
    transition: var(--transition-normal);
}

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

.image-decoration {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    opacity: 0.8;
    z-index: -1;
    animation: float 3s ease-in-out infinite;
}

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

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 5;
}

.scroll-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--white);
    border-radius: 50%;
    color: var(--primary-color);
    text-decoration: none;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    animation: bounce 2s infinite;
    position: relative;
    z-index: 6;
}

.scroll-btn:hover {
    color: var(--white);
    background: var(--primary-color);
    transform: translateY(-3px);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    transition: var(--transition-normal);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline-primary {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-light {
    background: var(--white);
    color: var(--gray-700);
    border-color: var(--white);
}

.btn-outline-light {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

/* About Section */
.about-content {
    padding-right: 2rem;
}

.about-title {
    font-size: 1.875rem;
    margin-bottom: 1.5rem;
    color: var(--gray-900);
}

.about-text {
    font-size: 1rem;
    color: var(--gray-600);
    margin-bottom: 1.5rem;
}

.objectives {
    margin-top: 2rem;
}

.objectives-title {
    font-size: 1.25rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.objectives-list {
    list-style: none;
}

.objectives-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 1rem;
    font-size: 0.95rem;
    color: var(--gray-600);
}

.objectives-list i {
    color: var(--accent-color);
    margin-top: 0.125rem;
    flex-shrink: 0;
}

.info-cards {
    display: grid;
    gap: 1.5rem;
}

.info-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    transform: translateZ(0);
    position: relative;
    z-index: 2;
}

.info-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.card-content h5 {
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: 0.25rem;
    color: var(--gray-900);
}

.card-content p {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin: 0;
}

/* Skills Section */
.bg-light {
    background-color: var(--gray-50) !important;
}

.skill-category {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    height: 100%;
    transition: var(--transition-normal);
    transform: translateZ(0);
    position: relative;
    z-index: 2;
}

.skill-category:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.category-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.category-header i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.category-header h4 {
    font-size: 1.25rem;
    color: var(--gray-900);
    margin: 0;
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.skill-tag {
    padding: 0.5rem 1rem;
    background: var(--gray-100);
    color: var(--gray-700);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    transition: var(--transition-fast);
    cursor: default;
}

.skill-tag.featured {
    background: var(--primary-color);
    color: var(--white);
}

.skill-tag:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Technology Icons - Mejorar tamaño y espaciado */
.tech-icons-title {
    font-size: 1.5rem;
    color: var(--gray-900);
    margin-bottom: 2rem;
}

.tech-icons {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 2.5rem;
    padding: 2rem;
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    margin: 0 auto;
    max-width: 900px;
    position: relative;
    z-index: 2;
}

.tech-icons i {
    font-size: 3.5rem;
    color: var(--gray-400);
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
}

.tech-icons i:hover {
    transform: translateY(-8px) scale(1.1);
    filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.2));
}

/* Colores específicos para cada tecnología */
.tech-icons .fa-python:hover { color: #3776ab; }
.tech-icons .fa-java:hover { color: #f89820; }
.tech-icons .fa-leaf:hover { color: #6db33f; } /* Spring Boot */
.tech-icons .fa-js-square:hover { color: #f7df1e; }
.tech-icons .fa-html5:hover { color: #e34f26; }
.tech-icons .fa-css3-alt:hover { color: #1572b6; }
.tech-icons .fa-git-alt:hover { color: #f05032; }
.tech-icons .fa-github:hover { color: #181717; }
.tech-icons .fa-linux:hover { color: #fcc624; }
.tech-icons .fa-android:hover { color: #3ddc84; }
.tech-icons .fa-database:hover { color: #336791; }

/* Estilos específicos para distinguir Django de Python */
.tech-icons i[title="Django"]:hover { 
    color: #092e20; /* Verde oscuro característico de Django */
}

.tech-icons i[title="Spring Boot"]:hover { 
    color: #6db33f; /* Verde de Spring */
}

.specializations {
    background: var(--white);
    padding: 3rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    position: relative;
    z-index: 2;
}

.spec-title {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--gray-900);
}

.spec-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.spec-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--gray-50);
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
}

.spec-item:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}

.spec-item i {
    font-size: 1.25rem;
    color: var(--primary-color);
    transition: var(--transition-fast);
}

.spec-item:hover i {
    color: var(--white);
}

.spec-item span {
    font-weight: var(--font-weight-medium);
}

/* Projects Section - Fix image overlay */
.project-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    height: 100%;
    position: relative;
    z-index: 2;
    transform: translateZ(0);
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.project-image {
    position: relative;
    overflow: hidden;
    height: 250px;
    z-index: 1;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.25), rgba(16, 185, 129, 0.15));
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: 2;
}

.project-card:hover .project-overlay {
    opacity: 1;
}

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

.project-content {
    padding: 1.5rem;
    background: var(--white);
    position: relative;
    z-index: 3;
}

.project-content h5 {
    font-size: 1.25rem;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.project-description {
    color: var(--gray-600);
    margin-bottom: 1rem;
    line-height: 1.6;
}

/* Tech badges for projects */
.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.tech-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
    color: var(--white);
}

/* badges de postgres y bootstrap */
.tech-badge.postgres { 
    background: #336791; 
    color: var(--white); 
}

.tech-badge.bootstrap { 
    background: #7952b3; 
    color: var(--white); 
}

.tech-badge.api { 
    background: #61dafb; 
    color: var(--gray-900); 
}

/* badges para el proyecto sísmico */
.tech-badge.php { 
    background: #777bb4; 
    color: var(--white); 
}

.tech-badge.geo { 
    background: #2e7d32; 
    color: var(--white); 
}

/* Actualizar el badge de data visualization */
.tech-badge.data { 
    background: #ff6b35; 
    color: var(--white); 
}

/* Nuevos badges para el proyecto móvil */
.tech-badge.kotlin { 
    background: #7f52ff; 
    color: var(--white); 
}

.tech-badge.android { 
    background: #3ddc84; 
    color: var(--gray-900); 
}

.tech-badge.bluetooth { 
    background: #0082fc; 
    color: var(--white); 
}

.tech-badge.education { 
    background: #ff6b35; 
    color: var(--white); 
}

.tech-badge.gamedev { 
    background: #e91e63; 
    color: var(--white); 
}

.tech-badge.binary { 
    background: #424242; 
    color: var(--white); 
}

.tech-badge.ascii { 
    background: #795548; 
    color: var(--white); 
}

/* Nuevos badges para IA y NLP */
.tech-badge.distilbert { 
    background: #ff6f00; 
    color: var(--white); 
}

.tech-badge.nlp { 
    background: #9c27b0; 
    color: var(--white); 
}

.tech-badge.transformers { 
    background: #f44336; 
    color: var(--white); 
}

.tech-badge.html { 
    background: #e34f26; 
    color: var(--white); 
}

/* Actualizar el badge de ML para distinguirlo */
.tech-badge.ml { 
    background: #4caf50; 
    color: var(--white); 
}

/* Nuevos badges para juego móvil con sensores */
.tech-badge.sensors { 
    background: #ff5722; 
    color: var(--white); 
}

.tech-badge.maps { 
    background: #4caf50; 
    color: var(--white); 
}

.tech-badge.mobile { 
    background: #607d8b; 
    color: var(--white); 
}

/* Ya tenemos estos badges definidos anteriormente */
.tech-badge.kotlin { 
    background: #7f52ff; 
    color: var(--white); 
}

.tech-badge.android { 
    background: #3ddc84; 
    color: var(--gray-900); 
}

.tech-badge.gamedev { 
    background: #e91e63; 
    color: var(--white); 
}


.tech-badge.python { background: #3776ab; }
.tech-badge.java { background: #f89820; }
.tech-badge.matlab { background: #0076a8; }
.tech-badge.iot { background: #00d4aa; }
.tech-badge.ml { background: #ff6b6b; }
.tech-badge.data { background: #4ecdc4; }
.tech-badge.django { background: #092e20; }
.tech-badge.js { background: #f7df1e; color: var(--gray-900); }
.tech-badge.db { background: #336791; }
.tech-badge.qt { background: #41cd52; }
.tech-badge.qml { background: #41cd52; }
.tech-badge.cpp { background: #00599c; }
.tech-badge.spring { background: #6db33f; }
.tech-badge.api { background: #61dafb; }
.tech-badge.pandas { background: #150458; }
.tech-badge.viz { background: #11557c; }

/* Timeline - Fix overlap */
.timeline {
    position: relative;
    padding-left: 2rem;
    z-index: 2;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 1rem;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gray-200);
    z-index: 1;
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    z-index: 3;
}

.timeline-marker {
    position: absolute;
    left: -2rem;
    top: 1rem;
    width: 3rem;
    height: 3rem;
    background: var(--white);
    border: 3px solid var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1rem;
    z-index: 4;
}

.timeline-marker.current {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: var(--white);
    animation: pulse-ring 2s infinite;
}

@keyframes pulse-ring {
    0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5); }
    50% { box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
    100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.timeline-content {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-left: 2rem;
    transition: var(--transition-normal);
    position: relative;
    z-index: 3;
}

.timeline-content:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.timeline-content.current {
    border-left: 4px solid var(--accent-color);
}

.timeline-header h5 {
    font-size: 1.25rem;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.company {
    display: block;
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.period {
    display: block;
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-bottom: 1rem;
}

.timeline-description {
    color: var(--gray-600);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    padding: 0.25rem 0.75rem;
    background: var(--gray-100);
    color: var(--gray-700);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
}

/* Education Section */
.education-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    overflow: hidden;
    height: 100%;
    transform: translateZ(0);
    position: relative;
    z-index: 2;
}

.education-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.education-card.current {
    border-top: 4px solid var(--accent-color);
}

.education-card.completed {
    border-top: 4px solid var(--primary-color);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 1.5rem 0;
}

.education-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.25rem;
}

.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
}

.status-badge.current {
    background: var(--accent-color);
    color: var(--white);
}

.status-badge.completed {
    background: var(--primary-color);
    color: var(--white);
}

.card-body {
    padding: 1.5rem;
}

.card-body h5 {
    font-size: 1.125rem;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.card-body h6 {
    font-size: 1rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.institution {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-bottom: 1rem;
}

.card-body .period {
    font-size: 0.875rem;
    color: var(--gray-600);
    font-weight: var(--font-weight-medium);
}

/* Certifications */
.certifications-title {
    font-size: 1.5rem;
    color: var(--gray-900);
    margin-bottom: 2rem;
}

.certification-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition-normal);
    height: 100%;
    transform: translateZ(0);
    position: relative;
    z-index: 2;
}

.certification-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.cert-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--warning-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: var(--white);
    font-size: 1.25rem;
}

.cert-content h6 {
    font-size: 1rem;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.cert-org {
    font-size: 0.875rem;
    color: var(--primary-color);
    font-weight: var(--font-weight-medium);
    margin-bottom: 0.5rem;
}

.cert-details {
    font-size: 0.8rem;
    color: var(--gray-500);
    margin-bottom: 1rem;
}

.cert-year {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--gray-100);
    color: var(--gray-700);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
}

/* Publications Section */
.publication-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    height: 100%;
    overflow: hidden;
    transform: translateZ(0);
    position: relative;
    z-index: 2;
}

.publication-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.pub-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 1.5rem 0;
}

.pub-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--warning-color), var(--accent-color));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.25rem;
}

.pub-type {
    font-size: 0.75rem;
    background: var(--primary-color);
    color: var(--white);
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-weight: var(--font-weight-medium);
}

.pub-content {
    padding: 1.5rem;
}

.pub-content h5 {
    font-size: 1.125rem;
    color: var(--gray-900);
    margin-bottom: 1rem;
    line-height: 1.4;
}

.pub-book {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin-bottom: 1rem;
}

.pub-details {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.pub-isbn {
    font-size: 0.75rem;
    background: var(--gray-100);
    color: var(--gray-700);
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-weight: var(--font-weight-medium);
}

.pub-year {
    font-size: 0.75rem;
    background: var(--accent-color);
    color: var(--white);
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-weight: var(--font-weight-medium);
}

.pub-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* Teaching Section */
.teaching-showcase {
    background: var(--white);
    padding: 3rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    position: relative;
    z-index: 2;
}

.showcase-header {
    margin-bottom: 3rem;
}

.showcase-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
    color: var(--white);
    font-size: 2rem;
}

.showcase-header h4 {
    font-size: 1.75rem;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.showcase-description {
    font-size: 1rem;
    color: var(--gray-600);
    max-width: 700px;
    margin: 0 auto;
}

.student-projects-link {
    margin: 2rem 0;
}

.link-description {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-top: 0.5rem;
}

.project-previews {
    margin-top: 3rem;
}

.preview-card {
    background: var(--gray-50);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-normal);
    height: 100%;
}

.preview-card:hover {
    transform: translateY(-4px);
    background: var(--white);
    box-shadow: var(--shadow-md);
}

.preview-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: var(--white);
    font-size: 1.25rem;
}

.preview-card h6 {
    font-size: 1rem;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.preview-card p {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin: 0;
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.contact-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

.contact-info:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.contact-details h5 {
    font-size: 1rem;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

.contact-details p,
.contact-details a {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin: 0;
    text-decoration: none;
}

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

.contact-form-container {
    background: var(--white);
    padding: 3rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 2;
}

.form-title {
    font-size: 1.5rem;
    color: var(--gray-900);
    text-align: center;
    margin-bottom: 2rem;
}

.form-group {
    position: relative;
}

.form-control {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: var(--transition-fast);
    background: var(--white);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-control::placeholder {
    color: var(--gray-400);
}

/* Footer - Fix z-index */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: 2rem 0;
    position: relative;
    z-index: 10;
}

.footer-text {
    margin: 0;
    color: var(--gray-300);
}

.social-links {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--gray-800);
    color: var(--gray-300);
    border-radius: 50%;
    text-decoration: none;
    transition: var(--transition-normal);
}

.social-links a:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}

/* Back to Top Button - Fix z-index */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    cursor: pointer;
    transition: var(--transition-normal);
    z-index: 1020;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --section-padding: 60px 0;
        --container-padding: 0 15px;
    }
    
    .navbar {
        z-index: 1040;
    }
    
    .hero-section {
        text-align: center;
        padding: 2rem 0;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .stat-item {
        display: flex;
        justify-content: space-between;
        text-align: left;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .profile-img {
        width: 250px;
        height: 250px;
        margin-bottom: 2rem;
    }
    
    .about-content {
        padding-right: 0;
        margin-bottom: 2rem;
    }
    
    .timeline {
        padding-left: 1rem;
    }
    
    .timeline-content {
        margin-left: 1rem;
    }
    
    .timeline-marker {
        left: -1.5rem;
        width: 2rem;
        height: 2rem;
        font-size: 0.75rem;
        z-index: 4;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-form-container {
        padding: 2rem 1rem;
    }
    
    .spec-grid {
        grid-template-columns: 1fr;
    }
    
    .navbar-nav {
        text-align: center;
        margin-top: 1rem;
    }
    
    .social-links {
        justify-content: center;
        margin-top: 1rem;
    }
    
    .footer .row {
        text-align: center;
    }
    
    .footer .col-md-6:last-child {
        text-align: center !important;
    }
    
    .tech-icons {
        gap: 1.5rem;
        padding: 1.5rem;
    }
    
    .tech-icons i {
        font-size: 2.5rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .skills-grid {
        gap: 0.5rem;
    }
    
    .skill-tag {
        font-size: 0.75rem;
        padding: 0.375rem 0.75rem;
    }
    
    .teaching-showcase {
        padding: 2rem 1rem;
    }
    
    .showcase-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .tech-icons {
        gap: 1rem;
        padding: 1rem;
    }
    
    .tech-icons i {
        font-size: 2rem;
    }
    
    .tech-icons-title {
        font-size: 1.25rem;
    }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* Loading and Animation States */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

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

/* Focus States for Accessibility */
.btn:focus,
.form-control:focus,
.nav-link:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #0000ff;
        --accent-color: #008000;
        --gray-600: #000000;
        --gray-500: #333333;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .scroll-btn {
        animation: none;
    }
    
    .hero-badge {
        animation: none;
    }
    
    .image-decoration {
        animation: none;
    }
}

/* Asegurar que los elementos no se superpongan durante las animaciones */
[data-aos] {
    pointer-events: none;
}

[data-aos].aos-animate {
    pointer-events: auto;
}

/* Print Styles */
@media print {
    .navbar,
    .scroll-indicator,
    .back-to-top,
    .hero-buttons {
        display: none !important;
    }
    
    .hero-section {
        min-height: auto;
        padding: 2rem 0;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
    
    .section-padding {
        padding: 1rem 0;
    }
    
    .box-shadow {
        box-shadow: none !important;
    }
}
/* ===== Project category filters (Web / Android) ===== */
.project-filters {
    display: inline-flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
    background: #f1f5f9;
    padding: 0.4rem;
    border-radius: 50px;
}
.filter-btn {
    border: none;
    background: transparent;
    color: var(--secondary-color);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.5rem 1.4rem;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.25s ease;
}
.filter-btn:hover { color: var(--primary-color); }
.filter-btn.active {
    background: var(--primary-color);
    color: #fff;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

/* ===== Course credit badge ===== */
.course-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.3px;
    text-transform: uppercase;
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.08);
    border: 1px solid rgba(37, 99, 235, 0.2);
    padding: 0.2rem 0.65rem;
    border-radius: 50px;
    text-decoration: none;
    margin-bottom: 0.6rem;
    transition: all 0.2s ease;
}
.course-badge:hover { background: var(--primary-color); color: #fff; }
.course-badge i { font-size: 0.78rem; }

/* ===== Project double-carousel showcase ===== */
.project-showcase { max-width: 1000px; margin: 0 auto 3.5rem; }
.project-showcase:last-of-type { margin-bottom: 1rem; }
.showcase-title { font-size: 1.4rem; font-weight: 700; color: var(--primary-dark); text-align: center; margin-bottom: 1.5rem; display: flex; align-items: center; justify-content: center; gap: 0.5rem; }
.showcase-title i { color: var(--primary-color); }
.showcase-stage { display: flex; align-items: center; gap: 0.75rem; }
.sc-arrow { flex: 0 0 auto; width: 46px; height: 46px; border-radius: 50%; border: none; background: var(--primary-color); color: #fff; font-size: 1rem; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: all 0.2s ease; box-shadow: 0 4px 14px rgba(37,99,235,0.3); }
.sc-arrow:hover { background: var(--primary-dark); transform: scale(1.08); }
.showcase-card { flex: 1 1 auto; min-width: 0; display: grid; grid-template-columns: 1.05fr 0.95fr; background: #fff; border-radius: 18px; overflow: hidden; box-shadow: 0 12px 40px rgba(15,23,42,0.12); }
.showcase-media { position: relative; background: #0b1f3a; display: flex; align-items: center; justify-content: center; min-height: 340px; overflow: hidden; }
.sc-img { max-width: 100%; max-height: 380px; width: auto; height: auto; object-fit: contain; display: block; }
.sc-img-arrow { position: absolute; top: 50%; transform: translateY(-50%); width: 36px; height: 36px; border-radius: 50%; border: none; background: rgba(0,0,0,0.45); color: #fff; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: background 0.2s; z-index: 2; }
.sc-img-arrow:hover { background: rgba(0,0,0,0.75); }
.sc-img-prev { left: 10px; }
.sc-img-next { right: 10px; }
.sc-dots { position: absolute; bottom: 10px; left: 0; right: 0; display: flex; gap: 6px; justify-content: center; z-index: 2; }
.sc-dot { width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,0.45); cursor: pointer; transition: all 0.2s; }
.sc-dot.active { background: #fff; width: 22px; border-radius: 5px; }
.showcase-info { padding: 1.75rem; display: flex; flex-direction: column; }
.sc-name { font-size: 1.3rem; font-weight: 700; color: #1e293b; margin: 0.2rem 0 0.6rem; }
.sc-desc { color: var(--secondary-color); font-size: 0.95rem; line-height: 1.6; margin-bottom: 1rem; flex: 1 0 auto; }
.showcase-tech { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1rem; }
.showcase-links { display: flex; flex-wrap: wrap; }
.sc-counter { text-align: center; font-weight: 700; color: var(--secondary-color); margin: 1rem 0 0.75rem; letter-spacing: 1px; }
.sc-pills { display: flex; gap: 0.5rem; overflow-x: auto; padding: 0.25rem 0.25rem 0.75rem; scrollbar-width: thin; }
.sc-pill { flex: 0 0 auto; border: 1px solid #e2e8f0; background: #fff; color: var(--secondary-color); font-size: 0.82rem; font-weight: 600; padding: 0.4rem 0.9rem; border-radius: 50px; cursor: pointer; white-space: nowrap; transition: all 0.2s; }
.sc-pill:hover { border-color: var(--primary-color); color: var(--primary-color); }
.sc-pill.active { background: var(--primary-color); border-color: var(--primary-color); color: #fff; }
@media (max-width: 768px) {
    .showcase-card { grid-template-columns: 1fr; }
    .showcase-media { min-height: 260px; }
    .sc-img { max-height: 300px; }
    .sc-arrow { width: 38px; height: 38px; }
    .showcase-stage { gap: 0.35rem; }
    .showcase-info { padding: 1.25rem; }
}

/* ===== Official Play Store apps: verified checkmark ===== */
.sc-verified {
    display: none;
    align-items: center;
    gap: 0.35rem;
    align-self: flex-start;
    background: #16a34a;
    color: #fff;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    padding: 0.22rem 0.65rem;
    border-radius: 50px;
    text-decoration: none;
    margin-bottom: 0.55rem;
}
.sc-verified:hover { background: #15803d; color: #fff; }
.sc-verified i { font-size: 0.85rem; }
.sc-media-check {
    display: none;
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 3;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: #16a34a;
    color: #fff;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.sc-media-check:hover { background: #15803d; color: #fff; }
.sc-pill-check { color: #16a34a; margin-left: 0.3rem; }
.sc-pill.active .sc-pill-check { color: #fff; }


/* ===== Publication DOI link ===== */
.pub-doi { display: inline-flex; align-items: center; gap: 0.4rem; font-size: 0.82rem; font-weight: 600; color: var(--primary-color); text-decoration: none; margin: 0.25rem 0 0.85rem; }
.pub-doi:hover { text-decoration: underline; }
.pub-doi i { font-size: 0.72rem; }


/* ===== Teaching: course repositories ===== */
.course-repos { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; margin-top: 2rem; }
.course-repo-btn { display: flex; flex-direction: column; align-items: center; gap: 0.3rem; text-decoration: none; background: #fff; border: 1px solid #e2e8f0; border-radius: 14px; padding: 1.4rem 1.6rem; min-width: 230px; transition: all 0.25s ease; box-shadow: 0 4px 14px rgba(15,23,42,0.05); }
.course-repo-btn:hover { transform: translateY(-4px); border-color: var(--primary-color); box-shadow: 0 10px 28px rgba(37,99,235,0.15); }
.course-repo-btn > i { font-size: 1.8rem; color: var(--primary-color); margin-bottom: 0.2rem; }
.course-repo-btn .repo-title { font-weight: 700; color: #1e293b; font-size: 0.98rem; }
.course-repo-btn .repo-sub { font-size: 0.8rem; color: var(--secondary-color); }


/* ===== Teaching: expandable repositories ===== */
.course-repo-toggle { cursor: pointer; font: inherit; -webkit-appearance: none; appearance: none; }
.course-repos-more { margin-top: 1rem; }
.course-repos-more[hidden] { display: none; }
.course-repo-toggle .toggle-chevron { transition: transform 0.25s ease; margin-left: 0.25rem; font-size: 0.7rem; }
.course-repo-toggle.open .toggle-chevron { transform: rotate(180deg); }