/* =========================================================
   assets/css/style.css
   ---------------------------------------------------------
   Hoja de estilos principal del sistema (Fase 12). Identidad
   visual propia, con soporte de tema claro/oscuro/automático
   y color principal personalizable (ambos configurables desde
   Configuración → Apariencia).

   Todo el CSS del sistema vive aquí — ninguna página debería
   tener <style> en línea a partir de esta fase. Esto también
   es lo que permite, si quieres, endurecer más adelante la
   política de seguridad (CSP) quitando 'unsafe-inline' de
   style-src.
   ========================================================= */

:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-bg: #f4f6fb;
    --color-surface: #ffffff;
    --color-text: #1f2937;
    --color-muted: #6b7280;
    --color-border: #e5e7eb;
    --color-error-bg: #fef2f2;
    --color-error-text: #b91c1c;
    --color-ok-bg: #f0fdf4;
    --color-ok-text: #15803d;
    --radius: 10px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

/* Tema oscuro: se activa automáticamente si el sistema
   operativo del visitante está en modo oscuro Y el admin no
   forzó un tema fijo, o manualmente con [data-theme="dark"]
   (lo que decide app.js según Configuración → Apariencia y la
   preferencia guardada en este navegador). */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --color-bg: #111827;
        --color-surface: #1f2937;
        --color-text: #f3f4f6;
        --color-muted: #9ca3af;
        --color-border: #374151;
        --color-error-bg: #451a1a;
        --color-error-text: #fca5a5;
        --color-ok-bg: #14291d;
        --color-ok-text: #86efac;
    }
}
:root[data-theme="dark"] {
    --color-bg: #111827;
    --color-surface: #1f2937;
    --color-text: #f3f4f6;
    --color-muted: #9ca3af;
    --color-border: #374151;
    --color-error-bg: #451a1a;
    --color-error-text: #fca5a5;
    --color-ok-bg: #14291d;
    --color-ok-text: #86efac;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
}

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

h1, h2, h3 { line-height: 1.3; }

code, pre {
    background: color-mix(in srgb, var(--color-border) 40%, transparent);
    border-radius: 6px;
    padding: 2px 6px;
    font-size: 0.85em;
}
pre { padding: 12px; overflow-x: auto; }

/* ---------------------------------------------------------
   Barra superior / navegación
   --------------------------------------------------------- */
.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 20px;
    position: sticky;
    top: 0;
    z-index: 20;
}
.navbar .brand {
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--color-text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}
.navbar .brand .dot {
    width: 10px; height: 10px; border-radius: 50%;
    background: var(--color-primary);
    display: inline-block;
}
.navbar nav {
    display: flex;
    align-items: center;
    gap: 18px;
}
.navbar nav a {
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.88rem;
}
.navbar nav a:hover { color: var(--color-primary); }
.navbar .menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.4rem;
    color: var(--color-text);
    cursor: pointer;
}
.navbar .theme-toggle {
    background: none;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    width: 32px; height: 32px;
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--color-text);
}

.page { max-width: 1080px; margin: 0 auto; padding: 24px 20px 60px; }
.page-narrow { max-width: 480px; }

/* ---------------------------------------------------------
   Componentes generales
   --------------------------------------------------------- */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card .value { font-size: 1.6rem; font-weight: 700; }
.stat-card .label { color: var(--color-muted); font-size: 0.85rem; margin-top: 4px; }

label { display: block; margin: 14px 0 4px; font-size: 0.85rem; font-weight: 600; }
input[type=text], input[type=email], input[type=password], input[type=number], select, textarea {
    width: 100%;
    padding: 9px 10px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    box-sizing: border-box;
    background: var(--color-surface);
    color: var(--color-text);
    font-size: 1rem;
}
.checkbox-row { display: flex; align-items: center; gap: 8px; margin-top: 14px; }
.checkbox-row input { width: auto; }

button, .btn {
    display: inline-block;
    padding: 9px 16px;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    font-size: 0.9rem;
    text-decoration: none;
    margin-top: 15px;
}
button:hover, .btn:hover { border-color: var(--color-primary); }
button.primary, .btn.primary {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}
button.primary:hover, .btn.primary:hover { background: var(--color-primary-dark); }
button.danger { background: var(--color-error-text); border-color: var(--color-error-text); color: #fff; }

.box { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 0.9rem; }
.box.error { background: var(--color-error-bg); color: var(--color-error-text); }
.box.ok { background: var(--color-ok-bg); color: var(--color-ok-text); }
.box ul, .box.error ul, .box.ok ul { margin: 0; padding-left: 18px; }

.muted { color: var(--color-muted); font-size: 0.85rem; }
.badge { padding: 2px 8px; border-radius: 999px; font-size: 0.75rem; }
.badge.active { background: var(--color-ok-bg); color: var(--color-ok-text); }
.badge.inactive { background: var(--color-error-bg); color: var(--color-error-text); }

.tabs { display: flex; gap: 4px; margin: 16px 0; flex-wrap: wrap; }
.tabs a { padding: 8px 14px; border-radius: 8px; text-decoration: none; color: var(--color-text); background: var(--color-surface); font-size: 0.85rem; border: 1px solid var(--color-border); }
.tabs a.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-surface);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--color-border); font-size: 0.9rem; }
th a { color: var(--color-text); text-decoration: none; }
tr:last-child td { border-bottom: none; }

.breadcrumbs a { color: var(--color-primary); text-decoration: none; }
.breadcrumbs span { color: var(--color-muted); margin: 0 4px; }

.toolbar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; align-items: center; }
.toolbar form { display: inline-flex; gap: 6px; align-items: center; }

/* ---------------------------------------------------------
   Vistas del administrador de archivos: lista / cuadrícula
   --------------------------------------------------------- */
.view-toggle { display: inline-flex; border: 1px solid var(--color-border); border-radius: 8px; overflow: hidden; }
.view-toggle a { padding: 7px 12px; font-size: 0.85rem; color: var(--color-text); text-decoration: none; }
.view-toggle a.active { background: var(--color-primary); color: #fff; }

.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 14px;
}
.file-tile {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 14px 10px;
    text-align: center;
    text-decoration: none;
    color: var(--color-text);
    position: relative;
}
.file-tile .icon { font-size: 2.2rem; display: block; margin-bottom: 8px; }
.file-tile .thumb { width: 100%; height: 80px; object-fit: cover; border-radius: 6px; margin-bottom: 8px; }
.file-tile .name { font-size: 0.8rem; word-break: break-word; display: block; }
.file-tile .meta { font-size: 0.7rem; color: var(--color-muted); }
.file-tile-actions { margin-top: 8px; display: flex; gap: 4px; justify-content: center; flex-wrap: wrap; }
.file-tile-actions a, .file-tile-actions button { font-size: 0.7rem; padding: 4px 6px; }

/* ---------------------------------------------------------
   Vista previa (imágenes / PDF / texto)
   --------------------------------------------------------- */
.preview-overlay {
    display: none;
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.75);
    z-index: 100;
    align-items: center;
    justify-content: center;
    padding: 24px;
}
.preview-overlay.open { display: flex; }
.preview-box {
    background: var(--color-surface);
    border-radius: var(--radius);
    max-width: min(90vw, 900px);
    max-height: 90vh;
    width: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.preview-box header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 12px 16px; border-bottom: 1px solid var(--color-border);
    font-size: 0.9rem;
}
.preview-box header button { border: none; background: none; font-size: 1.2rem; cursor: pointer; color: var(--color-text); }
.preview-box .preview-body { padding: 0; overflow: auto; flex: 1; display: flex; align-items: center; justify-content: center; background: var(--color-bg); }
.preview-box .preview-body img { max-width: 100%; max-height: 80vh; display: block; }
.preview-box .preview-body iframe { width: 100%; height: 80vh; border: none; }
.preview-box .preview-body pre { width: 100%; margin: 0; white-space: pre-wrap; word-break: break-word; }

/* ---------------------------------------------------------
   Responsive: navegación móvil pensada desde cero
   --------------------------------------------------------- */
@media (max-width: 720px) {
    .navbar .menu-toggle { display: inline-block; }
    .navbar nav {
        display: none;
        position: absolute;
        top: 100%; left: 0; right: 0;
        background: var(--color-surface);
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        align-items: flex-start;
        padding: 12px 20px 16px;
        gap: 14px;
    }
    .navbar nav.open { display: flex; }
    .page { padding: 16px 14px 48px; }
    table.responsive-stack, table.responsive-stack thead { display: none; }
    table.responsive-stack, table.responsive-stack tbody, table.responsive-stack tr, table.responsive-stack td { display: block; width: 100%; }
    table.responsive-stack tr { background: var(--color-surface); border-radius: var(--radius); box-shadow: var(--shadow); margin-bottom: 12px; padding: 10px 4px; }
    table.responsive-stack td { border: none; padding: 6px 12px; }
    table.responsive-stack td[data-label]::before {
        content: attr(data-label);
        display: block;
        font-size: 0.7rem;
        color: var(--color-muted);
        text-transform: uppercase;
        margin-bottom: 2px;
    }
    .toolbar { flex-direction: column; align-items: stretch; }
    .toolbar form { flex-wrap: wrap; }
    .cards-grid { grid-template-columns: 1fr 1fr; }
}