/* css/style.css */
:root {
    --bg-color: #f8f9fa;
    --text-color: #343a40;
    --primary-color: #d32f2f;
    --hover-color: #b71c1c;
    --header-height: 80px;
    --font-sans: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.site-header {
    width: 100%;
    height: var(--header-height);
    background-color: #ffcc00; /* Amarillo institucional */
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px;
}

.logo-container { height: 100%; display: flex; align-items: center; }
.site-logo { max-height: 60px; width: auto; object-fit: contain; }

.site-title-section {
    width: 100%; background-color: #fff; padding: 20px 0;
    text-align: center; border-bottom: 1px solid #eaeaea;
}
.main-title {
    font-size: 18px; font-weight: 600; color: var(--text-color);
    letter-spacing: 1.5px; text-transform: uppercase;
}

.icon-nav {
    width: 100%; background-color: #fff; padding: 15px 0;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05); z-index: 10; position: relative;
}
.nav-list { display: flex; justify-content: center; gap: 40px; list-style: none; }
.nav-item { position: relative; }
.nav-link {
    display: flex; align-items: center; justify-content: center;
    color: #495057; text-decoration: none; transition: 0.3s; padding: 10px;
}
.nav-link:hover { color: var(--primary-color); transform: scale(1.1); }
.nav-icon { width: 32px; height: 32px; }

.tooltip {
    position: absolute; bottom: -35px; left: 50%; transform: translateX(-50%);
    background-color: #343a40; color: #fff; padding: 5px 12px; border-radius: 4px;
    font-size: 13px; opacity: 0; visibility: hidden; transition: 0.3s; pointer-events: none; white-space: nowrap;
}
.tooltip::before {
    content: ''; position: absolute; top: -5px; left: 50%; transform: translateX(-50%);
    border-width: 0 5px 5px 5px; border-style: solid; border-color: transparent transparent #343a40 transparent;
}
.nav-link:hover .tooltip { opacity: 1; visibility: visible; }

.pdf-viewer-section {
    width: 100%; max-width: 1100px; margin: 30px auto; background: #fff;
    border-radius: 8px; box-shadow: 0 10px 25px rgba(0,0,0,0.1); overflow: hidden;
    display: flex; flex-direction: column;
}
.pdf-toolbar {
    background-color: #212529; padding: 12px 20px; display: flex; flex-wrap: wrap;
    align-items: center; gap: 10px;
}
.tool-btn {
    background-color: #495057; color: #fff; border: none; padding: 8px 14px;
    border-radius: 4px; cursor: pointer; font-size: 13px; transition: 0.2s;
}
.tool-btn:hover { background-color: #6c757d; }
.tts-btn { background-color: var(--primary-color); }
.tts-btn:hover { background-color: var(--hover-color); }
.page-info { color: #fff; font-size: 14px; margin: 0 10px; }
.spacer { flex-grow: 1; }

/* FIX CORRECCIÓN PARA SCROLL Y ALTURAS INFINITAS */
.flipbook-viewport {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: flex-start; /* Evita perder el borde superior al hacer zoom */
    background-color: #e9ecef;
    min-height: 500px;
    height: 85vh; /* ALTO LIMITE FIJO! Obliga a que nazcan barras de scroll nativas al extenderse el contenido */
    padding: 20px;
    position: relative;
    overflow: auto; /* Barras de navegación nativas aseguradas */
    transition: max-width 0.3s ease;
}

.container-flip {
    margin: 0 auto;
    position: relative;
}
.flipbook { box-shadow: 0 0 20px rgba(0,0,0,0.2); }
.page { background-color: #fff; overflow: hidden; }

.news-section { width: 100%; max-width: 1100px; margin: 0 auto 40px auto; padding: 0 20px; }
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.news-card {
    background: #fff; border: 1px solid #dee2e6; border-radius: 8px; min-height: 180px;
    display: flex; justify-content: center; align-items: center; transition: 0.3s;
}
.news-card:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.08); }
.news-placeholder { color: #adb5bd; font-size: 16px; font-weight: 600; text-transform: uppercase; }

.site-footer {
    width: 100%; background-color: #212529; padding: 30px 20px;
    display: flex; justify-content: center; margin-top: auto;
}
.social-container { display: flex; gap: 30px; }
.social-link { color: #f8f9fa; transition: 0.3s; }
.social-link:hover { color: var(--primary-color); transform: scale(1.15); }
.social-icon { width: 28px; height: 28px; }

@media (max-width: 900px) { .spacer { display: none; } .pdf-toolbar { justify-content: center; } }
@media (max-width: 768px) { .news-grid { grid-template-columns: 1fr; } .flipbook-viewport { padding: 5px; } .nav-list { gap: 20px; } }
@media (max-width: 480px) { .main-title { font-size: 16px; } .nav-icon { width: 26px; height: 26px; } }