/* Variables CSS para cambio de tema instantáneo */
:root {
    /* Tema claro (por defecto) */
    --bg-primary: #ffffff;
    --bg-secondary: #fafafa;
    --bg-hover: rgba(245, 250, 255, 0.8);
    --text-primary: #000000;
    --text-secondary: #666666;
    --border-color: #000000;
    --border-hover: #4F8CFF;
    --accent-color: #2366C4;
    --accent-light: #4F8CFF;
    --card-bg: #ffffff;
    --shadow-color: rgba(35, 102, 196, 0.1);
    --shadow-hover: rgba(35, 102, 196, 0.2);
    --icon-opacity: 0.1;
    --modal-bg: rgba(35, 102, 196, 0.13);
    --success-bg: #4F8CFF;
    --success-text: #fff;
    
    /* CRÍTICO: Sin transiciones para el cambio de tema */
    --theme-transition: none;
}

/* Tema oscuro */
[data-theme="dark"] {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-hover: rgba(56, 139, 253, 0.15);
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --border-color: #30363d;
    --border-hover: #388bfd;
    --accent-color: #58a6ff;
    --accent-light: #388bfd;
    --card-bg: #21262d;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --shadow-hover: rgba(56, 139, 253, 0.3);
    --icon-opacity: 0.08;
    --modal-bg: rgba(0, 0, 0, 0.7);
    --success-bg: #388bfd;
    --success-text: #f0f6fc;
}

/* Reset y tipografía */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
    scroll-behavior: smooth;
    transition: var(--theme-transition);
}

body {
    background-color: var(--bg-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 20px;
    position: relative;
    overflow-x: hidden;
    color: var(--text-primary);
    transition: var(--theme-transition);
}

/* Fondo con iconos */
.icon-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    opacity: var(--icon-opacity);
    transition: var(--theme-transition);
}

.icon-background .material-icons {
    color: var(--text-primary);
}

/* Ventana principal */
.window {
    background: var(--bg-primary);
    z-index: 1;
    position: relative;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin: 20px auto;
    transition: opacity 0.3s ease, transform 0.3s ease, background-color var(--theme-transition), border-color var(--theme-transition);
}

/* Barra de título */
.title-bar {
    background: var(--bg-primary);
    padding: 8px 16px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 35px;
    flex-shrink: 0;
    transition: var(--theme-transition);
}

.window-title {
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 400;
    transition: var(--theme-transition);
}

.window-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

.control {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: transform 0.2s, border-color var(--theme-transition);
}
.control:hover {
    transform: scale(1.1);
}
.minimize { background-color: #FFE600; }
.maximize { background-color: #FFA500; }
.close { background-color: #FF0000; }

/* Hero */
.hero-section {
    padding: 32px 24px;
    background-color: var(--bg-primary);
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    transition: var(--theme-transition);
}
.hero-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
    transition: var(--theme-transition);
}
.hero-subtitle {
    font-size: 14px;
    color: var(--text-primary);
    line-height: 1.5;
    max-width: 600px;
    margin: 0 auto;
    transition: var(--theme-transition);
}

/* Sobre Nosotros */
.about-section {
    padding: 32px 24px;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    transition: var(--theme-transition);
}
.about-section h2 {
    font-size: 20px;
    margin-bottom: 20px;
    text-align: center;
    color: var(--text-primary);
    transition: var(--theme-transition);
}
.about-content {
    max-width: 700px;
    margin: 0 auto;
    font-size: 14px;
    color: var(--text-primary);
    line-height: 1.6;
    text-align: center;
    transition: var(--theme-transition);
}

/* Características */
.features-section {
    padding: 24px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    border-bottom: 1px solid var(--border-color);
    transition: border-color var(--theme-transition);
}
.feature-card {
    background-color: var(--card-bg);
    border: 1.5px solid var(--border-color);
    border-radius: 4px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.2, 0.8, 0.4, 1), background-color var(--theme-transition), border-color var(--theme-transition);
    position: relative;
    overflow: hidden;
}
.feature-card:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
    transform: translateY(-6px) scale(1.03);
    z-index: 1;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}
.material-icons {
    font-size: 24px;
    color: var(--text-primary);
    margin-bottom: 12px;
    transition: var(--theme-transition);
}
.feature-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
    transition: var(--theme-transition);
}
.feature-description {
    font-size: 14px;
    color: var(--text-primary);
    line-height: 1.4;
    margin-bottom: 16px;
    transition: var(--theme-transition);
}
.feature-list {
    list-style: none;
    margin-top: 12px;
}
.feature-list li {
    font-size: 13px;
    margin-bottom: 6px;
    color: var(--text-primary);
    padding-left: 20px;
    position: relative;
    transition: var(--theme-transition);
}

/* Perfiles de Usuario */
.roles-section {
    padding: 32px 24px;
    border-bottom: 1px solid var(--border-color);
    transition: border-color var(--theme-transition);
}
.roles-section h2 {
    font-size: 20px;
    margin-bottom: 24px;
    text-align: center;
    color: var(--text-primary);
    transition: var(--theme-transition);
}
.roles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}
.role-card {
    background-color: var(--card-bg);
    border: 1.5px solid var(--border-color);
    border-radius: 4px;
    padding: 16px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.2, 0.8, 0.4, 1), background-color var(--theme-transition), border-color var(--theme-transition);
    position: relative;
    overflow: hidden;
}
.role-card:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
    transform: translateY(-6px) scale(1.03);
    z-index: 1;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}
.role-card h3 {
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--text-primary);
    transition: var(--theme-transition);
}
.role-card ul {
    list-style: none;
}
.role-card ul li {
    font-size: 13px;
    margin-bottom: 8px;
    color: var(--text-primary);
    transition: var(--theme-transition);
}
.role-card-student {
    border: 2px solid var(--accent-light) !important;
    background-color: var(--bg-hover);
}
.role-card-student h3 {
    color: var(--accent-color);
}

/* Testimonios */
.testimonials-section {
    padding: 32px 24px;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    transition: var(--theme-transition);
}
.testimonials-section h2 {
    font-size: 20px;
    margin-bottom: 20px;
    text-align: center;
    color: var(--text-primary);
    transition: var(--theme-transition);
}
.testimonials-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-top: 24px;
}
.testimonial-card {
    background-color: var(--card-bg);
    border: 1.5px solid var(--border-color);
    border-radius: 4px;
    padding: 16px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.2, 0.8, 0.4, 1), background-color var(--theme-transition), border-color var(--theme-transition);
    position: relative;
    overflow: hidden;
}
.testimonial-card:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
    transform: translateY(-6px) scale(1.03);
    z-index: 1;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}
.testimonial-author {
    margin-top: 12px;
    font-weight: 600;
    color: var(--accent-color);
    font-size: 13px;
    transition: var(--theme-transition);
}

/* Tecnologías */
.tech-section {
    padding: 32px 24px;
    border-bottom: 1px solid var(--border-color);
    transition: border-color var(--theme-transition);
}
.tech-section h2 {
    font-size: 20px;
    margin-bottom: 24px;
    text-align: center;
    color: var(--text-primary);
    transition: var(--theme-transition);
}
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 20px;
    text-align: center;
}
.tech-item {
    background-color: var(--card-bg);
    border: 1.5px solid var(--border-color);
    border-radius: 4px;
    padding: 16px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.2, 0.8, 0.4, 1), background-color var(--theme-transition), border-color var(--theme-transition);
    position: relative;
    overflow: hidden;
}
.tech-item:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
    transform: translateY(-6px) scale(1.03);
    z-index: 1;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}
.tech-item h4 {
    font-size: 14px;
    margin-top: 8px;
    color: var(--text-primary);
    transition: var(--theme-transition);
}

/* Llamada a la acción */
.cta-section {
    padding: 32px 24px;
    background-color: var(--bg-primary);
    text-align: center;
    transition: var(--theme-transition);
}
.cta-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
    transition: var(--theme-transition);
}
.cta-button {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    padding: 8px 24px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease, background-color var(--theme-transition), color var(--theme-transition), border-color var(--theme-transition);
}
.cta-button:hover {
    background-color: var(--bg-secondary);
    box-shadow: 0 4px 20px var(--shadow-hover);
}

/* Footer */
.footer {
    border-bottom: none;
    border-radius: 0 0 4px 4px;
    text-align: center;
    font-size: 13px;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    padding: 16px 24px;
    transition: var(--theme-transition);
}
.footer a {
    color: var(--accent-color);
    text-decoration: none;
    margin: 0 8px;
    font-weight: 500;
    transition: var(--theme-transition);
}
.footer a:hover {
    text-decoration: underline;
}

/* Botón de toggle del tema */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-color var(--theme-transition), border-color var(--theme-transition);
    box-shadow: 0 2px 10px var(--shadow-color);
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 20px var(--shadow-hover);
}

.theme-toggle .material-icons {
    font-size: 24px;
    color: var(--text-primary);
    margin-bottom: 0;
}

/* Animaciones */
.window-minimize-animation {
    transform: translateY(40px);
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
}
.window-maximize-animation {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    margin: 0 !important;
    border-radius: 0 !important;
    z-index: 1000 !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.window-close-animation {
    transform: scale(0.9);
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

/* Botón central genérico para restaurar/reabrir */
.centered-quork-button {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--card-bg);
    border: 1.5px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 18px var(--shadow-color);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 18px;
    padding: 18px 32px;
    z-index: 1001;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: background 0.3s, box-shadow 0.3s, transform 0.2s, background-color var(--theme-transition), border-color var(--theme-transition), color var(--theme-transition);
    animation: popIn 0.5s;
}
.centered-quork-button img {
    width: 32px;
    height: 32px;
    object-fit: contain;
    margin-right: 8px;
    transition: transform 0.3s;
}
.centered-quork-button:hover {
    background: var(--bg-hover);
    box-shadow: 0 8px 32px var(--shadow-hover);
    transform: translate(-50%, -50%) scale(1.06) rotate(-2deg);
}
.centered-quork-button:hover img {
    transform: rotate(10deg) scale(1.1);
}

/* Botón SOLO ICONO para reabrir (cerrar) */
.centered-quork-icon-button {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    box-shadow: 0 8px 32px var(--shadow-color);
    padding: 0;
    z-index: 1002;
    cursor: pointer;
    width: 90px;
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s, box-shadow 0.3s, transform 0.2s, background-color var(--theme-transition), border-color var(--theme-transition);
    animation: popIn 0.5s;
}
.centered-quork-icon-button img {
    width: 56px;
    height: 56px;
    object-fit: contain;
    transition: transform 0.3s;
}
.centered-quork-icon-button:hover {
    background: var(--bg-hover);
    box-shadow: 0 12px 48px var(--shadow-hover);
    transform: translate(-50%, -50%) scale(1.10) rotate(2deg);
}
.centered-quork-icon-button:hover img {
    transform: rotate(-8deg) scale(1.13);
}

/* Modal personalizado */
.custom-modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100vw;
    height: 100vh;
    background: var(--modal-bg);
    backdrop-filter: blur(2px);
    justify-content: center;
    align-items: center;
    transition: var(--theme-transition);
}

.custom-modal.show {
    display: flex;
}

.custom-modal-content {
    background: var(--card-bg);
    border: 2px solid var(--accent-light);
    border-radius: 8px;
    box-shadow: 0 8px 32px var(--shadow-hover);
    padding: 32px 32px 24px 32px;
    text-align: center;
    min-width: 280px;
    animation: popIn 0.4s;
    color: var(--text-primary);
    transition: var(--theme-transition);
}

.custom-modal-icon {
    font-size: 44px;
    color: var(--accent-color);
    margin-bottom: 16px;
    display: block;
    transition: var(--theme-transition);
}

/* Animaciones de pulso para iconos */
@keyframes pulseEffect {
    0% { opacity: 0.1; transform: scale(1); }
    50% { opacity: 0.3; transform: scale(1.05); }
    100% { opacity: 0.1; transform: scale(1); }
}

.pulse {
    animation: pulseEffect 0.6s ease-in-out;
}

/* Animación para mensaje de éxito */
@keyframes fadeInOut {
    0% { opacity: 0; transform: translateY(10px);}
    10% { opacity: 1; transform: translateY(0);}
    90% { opacity: 1; transform: translateY(0);}
    100% { opacity: 0; transform: translateY(-10px);}
}

@keyframes popIn {
    0% { opacity: 0; transform: translate(-50%, -45%) scale(0.9); }
    100% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

/* Formulario de contacto */
.contact-form {
    transition: var(--theme-transition);
}

/* Mensaje de éxito */
.success-message {
    background: var(--success-bg);
    color: var(--success-text);
    padding: 10px 20px;
    border-radius: 4px;
    text-align: center;
    margin-top: 14px;
    font-weight: 600;
    font-size: 14px;
    animation: fadeInOut 2.5s forwards;
    transition: var(--theme-transition);
}

/* Responsive */
@media (max-width: 768px) {
    .window {
        margin: 10px auto;
    }
    .hero-title {
        font-size: 20px;
    }
    .features-section {
        grid-template-columns: 1fr;
    }
    .roles-grid {
        grid-template-columns: 1fr;
    }
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .about-section,
    .testimonials-section,
    .contact-section,
    .footer {
        padding: 20px 10px;
    }
    .testimonials-list {
        grid-template-columns: 1fr;
    }
    
    .theme-toggle {
        top: 10px;
        right: 10px;
        width: 45px;
        height: 45px;
    }
    
    .theme-toggle .material-icons {
        font-size: 20px;
    }
}