/* ============================================================================
   base.css — Tipografía base, utilitarios globales y componentes compartidos
   ============================================================================ */

html {
    font-size: 16px;
    scroll-behavior: smooth;
    color-scheme: light dark;
}

body {
    font-family: var(--font-body);
    font-size: var(--fs-base);
    font-weight: var(--fw-regular);
    line-height: var(--lh-normal);
    color: var(--color-text);
    background-color: var(--color-bg);
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* Títulos */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: var(--fw-bold);
    line-height: var(--lh-tight);
    color: var(--color-text);
}

h1 { font-size: var(--fs-4xl); }
h2 {
    font-size: var(--fs-3xl);
    text-transform: uppercase;
    letter-spacing: 0.02em;
    font-weight: var(--fw-bold);
}
h3 { font-size: var(--fs-2xl); }
h4 { font-size: var(--fs-xl); }
h5 { font-size: var(--fs-lg); }
h6 { font-size: var(--fs-md); }

@media (max-width: 768px) {
    h1 { font-size: var(--fs-3xl); }
    h2 { font-size: var(--fs-2xl); }
    h3 { font-size: var(--fs-xl); }
}

p {
    font-size: var(--fs-md);        /* 18px — más grande para mejor lectura */
    line-height: var(--lh-relaxed);
    color: var(--color-text);
}

/* Excepción: textos pequeños UI no se inflan */
.opinion-card__relation,
.post-card__meta,
.post-card__excerpt,
.single-post__meta,
.site-footer__tagline,
.site-footer__menu a,
.site-footer__copyright,
.documento-item__desc,
.profesor-card__excerpt,
.nivel-card__desc,
.valor-card__desc,
.sede-block__desc,
small {
    font-size: var(--fs-sm);
}

a {
    color: var(--color-primary);
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
}

/* Layout containers */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-5);
    padding-right: var(--space-5);
}

.container--narrow {
    max-width: var(--container-narrow);
}

/* Secciones */
.section {
    padding-top: var(--space-12);
    padding-bottom: var(--space-12);
}

@media (max-width: 768px) {
    .section {
        padding-top: var(--space-8);
        padding-bottom: var(--space-8);
    }
}

/* Botones */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-heading);
    font-weight: var(--fw-semibold);
    font-size: var(--fs-base);
    line-height: 1;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: background-color var(--transition-fast),
                border-color var(--transition-fast),
                color var(--transition-fast),
                transform var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn:hover {
    text-decoration: none;
}

.btn:active {
    transform: translateY(1px);
}

.btn--primary {
    background-color: var(--color-cta-bg, var(--color-primary));
    color: var(--color-cta-text, #ffffff);
    border-color: var(--color-cta-bg, var(--color-primary));
    box-shadow: 0 2px 8px rgba(0, 74, 173, 0.25);
}

.btn--primary:hover {
    background-color: var(--color-cta-bg-hover, var(--color-secondary));
    border-color: var(--color-cta-bg-hover, var(--color-secondary));
    color: var(--color-cta-text, #ffffff);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(1, 173, 237, 0.35);
}

.btn--primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(0, 74, 173, 0.25);
}

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

.btn--secondary:hover {
    background-color: var(--color-primary);
    color: #ffffff;
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 74, 173, 0.25);
}

/* Card image — patrón compartido para todas las imágenes en cards */
.card-image {
    overflow: hidden;
    border-radius: var(--radius-md);
    background: var(--color-bg-alt);
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

/* Respeta motion preference */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ============================================================================
   Scroll reveal animations (manejadas por scroll-reveal.js)
   El JS añade .reveal antes de que el elemento entre al viewport,
   y .is-revealed cuando sí entra.
   ============================================================================ */

.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition:
        opacity 600ms cubic-bezier(0.2, 0.7, 0.3, 1),
        transform 700ms cubic-bezier(0.2, 0.7, 0.3, 1);
    transition-delay: var(--reveal-delay, 0ms);
    will-change: opacity, transform;
}

.reveal.is-revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Para cards que estén en un grid con stagger — transform sutil lateral */
.valor-card.reveal,
.nivel-card.reveal,
.opinion-card.reveal,
.profesor-card.reveal,
.post-card.reveal {
    transform: translateY(24px) scale(0.97);
}

.valor-card.reveal.is-revealed,
.nivel-card.reveal.is-revealed,
.opinion-card.reveal.is-revealed,
.profesor-card.reveal.is-revealed,
.post-card.reveal.is-revealed {
    transform: translateY(0) scale(1);
}