/**
 * UPN Tabs — Frontend Styles
 * Universidad Pedagógica Nacional
 *
 * Tokens del tema (con fallback):
 *   --upn-blue:   #001C7C
 *   --upn-orange: #FE6D00
 */

/* ============================================================
   Variables locales
   ============================================================ */

.upn-tabs {
    --tabs-bg:               #ffffff;
    --tabs-border:           #e5e7eb;
    --tabs-tab-bg:           transparent;
    --tabs-tab-text:         #4b5563;
    --tabs-tab-hover-bg:     #f3f4f6;
    --tabs-tab-hover-text:   #111827;
    --tabs-tab-active-text:  var(--upn-blue, #001C7C);
    --tabs-accent:           var(--upn-orange, #FE6D00);
    --tabs-panel-bg:         #ffffff;
    --tabs-panel-text:       #374151;
    --tabs-focus-ring:       var(--upn-blue, #001C7C);
    --tabs-radius:           0.5rem;
    --tabs-transition:       0.2s ease;
}

.dark .upn-tabs {
    --tabs-bg:               #1f2937;
    --tabs-border:           #374151;
    --tabs-tab-bg:           transparent;
    --tabs-tab-text:         #9ca3af;
    --tabs-tab-hover-bg:     #374151;
    --tabs-tab-hover-text:   #f3f4f6;
    --tabs-tab-active-text:  #ffffff;
    --tabs-accent:           var(--upn-orange, #FE6D00);
    --tabs-panel-bg:         #111827;
    --tabs-panel-text:       #d1d5db;
    --tabs-focus-ring:       #60a5fa;
}

/* ============================================================
   Wrapper
   ============================================================ */

.upn-tabs {
    margin-bottom: 1.5rem;
    color: var(--tabs-panel-text);
}

.upn-tabs *,
.upn-tabs *::before,
.upn-tabs *::after {
    box-sizing: border-box;
}

/* ============================================================
   Tablist (lista de pestañas)
   ============================================================ */

.upn-tabs__list {
    display: flex;
    gap: 0.25rem;
    border-bottom: 2px solid var(--tabs-border);
    margin-bottom: 1rem;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: thin;
}

.upn-tabs__list::-webkit-scrollbar {
    height: 4px;
}
.upn-tabs__list::-webkit-scrollbar-thumb {
    background: var(--tabs-border);
    border-radius: 4px;
}

/* ============================================================
   Tab (botón individual)
   ============================================================ */

.upn-tabs__tab {
    all: unset;
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    font: inherit;
    font-weight: 600;
    font-size: 0.95rem;
    line-height: 1.4;
    color: var(--tabs-tab-text);
    background-color: var(--tabs-tab-bg);
    cursor: pointer;
    white-space: nowrap;
    transition: color var(--tabs-transition), background-color var(--tabs-transition);
    border-top-left-radius: var(--tabs-radius);
    border-top-right-radius: var(--tabs-radius);
}

.upn-tabs__tab:hover {
    background-color: var(--tabs-tab-hover-bg);
    color: var(--tabs-tab-hover-text);
}

.upn-tabs__tab:focus-visible {
    outline: 2px solid var(--tabs-focus-ring);
    outline-offset: 2px;
}

.upn-tabs__tab.is-active {
    color: var(--tabs-tab-active-text);
}

/* Barra inferior naranja UPN para el tab activo (horizontal) */
.upn-tabs--horizontal .upn-tabs__tab::after {
    content: '';
    position: absolute;
    left: 0.5rem;
    right: 0.5rem;
    bottom: -2px;
    height: 3px;
    background-color: var(--tabs-accent);
    border-radius: 3px 3px 0 0;
    opacity: 0;
    transform: scaleX(0.6);
    transform-origin: center;
    transition: opacity var(--tabs-transition), transform var(--tabs-transition);
}

.upn-tabs--horizontal .upn-tabs__tab.is-active::after {
    opacity: 1;
    transform: scaleX(1);
}

/* ============================================================
   Panels
   ============================================================ */

.upn-tabs__panel {
    padding: 1rem 0;
    color: var(--tabs-panel-text);
}

.upn-tabs__panel[hidden] {
    display: none;
}

.upn-tabs__panel:focus-visible {
    outline: 2px solid var(--tabs-focus-ring);
    outline-offset: 2px;
    border-radius: var(--tabs-radius);
}

.upn-tabs__panel > *:first-child {
    margin-top: 0;
}

.upn-tabs__panel > *:last-child {
    margin-bottom: 0;
}

/* ============================================================
   Variante vertical
   ============================================================ */

.upn-tabs--vertical {
    display: grid;
    grid-template-columns: minmax(180px, 220px) 1fr;
    gap: 1.5rem;
    align-items: start;
}

.upn-tabs--vertical .upn-tabs__list {
    flex-direction: column;
    border-bottom: none;
    border-right: 2px solid var(--tabs-border);
    margin-bottom: 0;
    gap: 0;
    padding-right: 0.5rem;
    overflow-x: visible;
}

.upn-tabs--vertical .upn-tabs__tab {
    width: 100%;
    justify-content: flex-start;
    border-radius: var(--tabs-radius) 0 0 var(--tabs-radius);
    padding: 0.75rem 1rem;
}

/* Barra derecha naranja para vertical activo */
.upn-tabs--vertical .upn-tabs__tab::after {
    content: '';
    position: absolute;
    top: 0.4rem;
    bottom: 0.4rem;
    right: -0.5rem;
    width: 3px;
    height: auto;
    background-color: var(--tabs-accent);
    border-radius: 3px 0 0 3px;
    opacity: 0;
    transform: scaleY(0.6);
    transform-origin: center;
    transition: opacity var(--tabs-transition), transform var(--tabs-transition);
}

.upn-tabs--vertical .upn-tabs__tab.is-active::after {
    opacity: 1;
    transform: scaleY(1);
}

.upn-tabs--vertical .upn-tabs__panels {
    min-width: 0;
}

.upn-tabs--vertical .upn-tabs__panel {
    padding: 0;
}

/* ============================================================
   Comportamiento mobile
   ============================================================ */

/* Variante "accordion": tabs se transforman en acordeón en pantallas chicas */
@media (max-width: 640px) {
    .upn-tabs--mobile-accordion.upn-tabs--horizontal,
    .upn-tabs--mobile-accordion.upn-tabs--vertical {
        display: block;
    }

    .upn-tabs--mobile-accordion .upn-tabs__list {
        display: none;
    }

    .upn-tabs--mobile-accordion .upn-tabs__panels {
        display: block;
    }

    .upn-tabs--mobile-accordion .upn-tabs__panel {
        display: block !important;
        padding: 0;
        margin-bottom: 0.5rem;
        border: 1px solid var(--tabs-border);
        border-radius: var(--tabs-radius);
        overflow: hidden;
    }

    .upn-tabs--mobile-accordion .upn-tabs__panel[hidden] {
        display: block !important;
    }

    /* Trigger: el contenido del tab original se inyecta dinámicamente como header del acordeón */
    .upn-tabs--mobile-accordion .upn-tabs__panel-trigger {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 0.5rem;
        width: 100%;
        padding: 0.75rem 1rem;
        background-color: var(--tabs-tab-hover-bg);
        color: var(--tabs-tab-hover-text);
        font-weight: 600;
        cursor: pointer;
        border: none;
        font-family: inherit;
        font-size: 0.95rem;
    }

    .upn-tabs--mobile-accordion .upn-tabs__panel-trigger::after {
        content: '';
        display: inline-block;
        width: 12px;
        height: 12px;
        background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 256 256'%3E%3Cpath fill='%236b7280' d='M213.66 101.66l-80 80a8 8 0 0 1-11.32 0l-80-80a8 8 0 0 1 11.32-11.32L128 164.69l74.34-74.35a8 8 0 0 1 11.32 11.32Z'/%3E%3C/svg%3E");
        background-repeat: no-repeat;
        background-size: contain;
        transition: transform var(--tabs-transition);
    }

    .upn-tabs--mobile-accordion .upn-tabs__panel.is-open .upn-tabs__panel-trigger::after {
        transform: rotate(180deg);
    }

    .upn-tabs--mobile-accordion .upn-tabs__panel-body {
        display: none;
        padding: 1rem;
        background-color: var(--tabs-panel-bg);
    }

    .upn-tabs--mobile-accordion .upn-tabs__panel.is-open .upn-tabs__panel-body {
        display: block;
    }

    /* Resetear grid en vertical */
    .upn-tabs--mobile-accordion.upn-tabs--vertical {
        grid-template-columns: 1fr;
        gap: 0;
    }
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
    .upn-tabs__tab,
    .upn-tabs__tab::after,
    .upn-tabs--mobile-accordion .upn-tabs__panel-trigger::after {
        transition: none;
    }
}