/**
 * Tema central del proyecto – fuentes y variables de diseño
 * Cambia aquí la fuente para que se aplique en toda la aplicación.
 */
@import url('https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&display=swap');

:root {
    --font-sans: 'Poppins', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --color-menu-bar: #040e14;
    --color-menu-bar-hover: #0c1820;
    --color-menu-active: #87CEEB;
    --color-accent: #87CEEB;
    --color-accent-hover: #6bb8d6;
    --color-accent-dark: #4a9bc2;
    --color-accent-text: #ffffff;
    --color-accent-soft: rgba(135, 206, 235, 0.15);
    --color-page-bg: #daf5ff;
}

body {
    font-family: var(--font-sans);
}

p {
    font-size: 1.125rem; /* 18px */
}

/* Logo PNG negro → blanco sobre cabeceras/menús oscuros */
.logo-sirius--light {
    filter: brightness(0) invert(1);
}

.menu-bar {
    background-color: var(--color-menu-bar);
}

.menu-bar-mobile {
    background-color: var(--color-menu-bar);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.menu-bar-item-hover:hover {
    background-color: var(--color-menu-bar-hover);
}

.nav-link-active-half {
    position: relative;
    border-bottom: none !important;
    color: var(--color-menu-active) !important;
}

.nav-link-active-half::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50%;
    height: 2px;
    background: var(--color-menu-active);
}

.sidebar .nav-link.active {
    color: var(--color-menu-active);
    background-color: rgba(135, 206, 235, 0.12);
}

.topic-nav-active {
    border-left-color: var(--color-menu-active) !important;
}

/* Fondo de páginas del área de usuario (home, mis datos, etc.) */
.page-bg-sirius {
    background: var(--color-page-bg) !important;
    background-size: 100% 100% !important;
    background-repeat: no-repeat !important;
    min-height: 100vh;
}

/* Páginas de error (404, 503) */
.error-page {
    background: var(--color-page-bg) !important;
    min-height: 100vh;
}

.error-page .title-grande,
.error-page .txt-beta {
    color: #000000;
}

.error-page .btn-error {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-width: 190px;
    padding: 10px 1.25rem;
    background-color: var(--color-accent);
    color: var(--color-accent-text);
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    transition: background-color 0.2s;
}

.error-page .btn-error:hover {
    background-color: var(--color-accent-hover);
    color: var(--color-accent-text);
}

/* Barra de progreso de cursos */
.course-progress-fill {
    background-color: var(--color-accent);
}

/* Títulos de curso (home y cabecera de contenido) */
.course-home-title,
.course-hero-title {
    font-size: 1.9rem;
    line-height: 2.2rem;
    font-weight: 500;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.course-home-title {
    color: #111827;
}

.course-hero-title {
    color: #ffffff !important;
}

.course-home-section-title {
    font-size: 1.875rem;
    line-height: 2.125rem;
    font-weight: 500;
    color: #111827;
}

@media (min-width: 768px) {
    .course-home-title,
    .course-hero-title {
        font-size: 2rem;
        line-height: 2.25rem;
    }

    .course-home-section-title {
        font-size: 2rem;
        line-height: 2.25rem;
    }
}

/* Tarjetas de curso en home */
.course-home-section {
    padding-top: 1.5rem;
    padding-bottom: 1.5rem;
}

.course-home-section--secondary {
    padding-top: 1.25rem;
    padding-bottom: 1.5rem;
}

@media (min-width: 768px) {
    .course-home-section {
        padding-top: 1.5rem;
        padding-bottom: 2rem;
    }

    .course-home-section--secondary {
        padding-top: 1rem;
        padding-bottom: 2rem;
    }
}

.course-home-card-title-mobile {
    padding: 1rem 1rem 0.75rem;
}

.course-home-card-image {
    padding: 0.5rem 1rem 0.5rem;
}

.course-home-card-body {
    padding: 0.25rem 1rem 1rem;
}

@media (min-width: 768px) {
    .course-home-card-title-mobile {
        display: none;
    }

    .course-home-card-image {
        padding: 1.25rem;
    }

    .course-home-card-body {
        padding: 1.5rem;
    }
}

/* Cabecera del curso (vista contenido, fondo oscuro) */
.course-hero-section {
    padding-top: 1rem;
    padding-bottom: 1.5rem;
}

@media (min-width: 768px) {
    .course-hero-section {
        padding-top: 2rem;
        padding-bottom: 2rem;
    }
}

.course-hero-title-mobile {
    padding: 0 1rem 0.75rem;
}

.course-hero-image {
    padding: 0.5rem 0 0;
}

.course-hero-content {
    padding-top: 0.25rem;
}

@media (min-width: 768px) {
    .course-hero-title-mobile {
        display: none;
    }

    .course-hero-image {
        padding: 0;
    }

    .course-hero-content {
        padding-top: 0;
    }

    .course-hero-inner {
        gap: 2rem;
    }
}

/* Navegación de secciones del curso (Herramientas, Contenido, etc.) */
.course-section-nav__link {
    display: inline-block;
    width: 100%;
    text-align: center;
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    font-weight: 500;
    font-size: 0.875rem;
    line-height: 1.25;
    text-decoration: none !important;
    transition: background-color 0.2s, color 0.2s, border-color 0.2s, box-shadow 0.2s;
    border: 1px solid transparent;
}

@media (min-width: 640px) {
    .course-section-nav__link {
        width: auto;
        font-size: 1rem;
        padding: 0.5rem 1.5rem;
    }
}

.course-section-nav__link--active {
    background-color: var(--color-accent);
    color: #0f172a !important;
    border-color: var(--color-accent);
    font-weight: 600;
    box-shadow: 0 2px 12px rgba(135, 206, 235, 0.5);
}

.course-section-nav__link--inactive {
    background-color: rgba(255, 255, 255, 0.12);
    color: rgba(255, 255, 255, 0.88) !important;
    border-color: rgba(255, 255, 255, 0.4);
}

.course-section-nav__link--inactive:hover {
    background-color: rgba(255, 255, 255, 0.2);
    color: #ffffff !important;
    border-color: rgba(255, 255, 255, 0.65);
}