/* =========================================================================
   MES RESSOURCES — feuille de style unique
   Aucune dépendance externe : polices système uniquement (léger, rapide,
   fonctionne même sans connexion à un CDN de polices).
   ========================================================================= */

:root {
    /* --- Palette : "index de bibliothèque" ------------------------------ */
    --paper:      #F1EEE6;   /* fond principal, papier clair */
    --paper-alt:  #E8E3D6;   /* fiches / cartes */
    --paper-deep: #DED7C4;   /* survol des fiches */
    --ink:        #23291F;   /* texte principal, encre */
    --ink-soft:   #5B6156;   /* texte secondaire */
    --line:       #CFC7AF;   /* filets, séparateurs */
    --rail:       #1E2621;   /* barre latérale, quasi-noir vert */
    --rail-text:  #E7E3D4;
    --accent:     #2F5D50;   /* vert pin — actions, liens actifs */
    --accent-ink: #F1EEE6;
    --warm:       #A85A2A;   /* rouille — accents ponctuels (dates, tags) */
    --danger:     #8C3A2B;

    --radius: 3px;
    --shadow-card: 0 1px 0 rgba(35,41,31,.05);
    --font-display: ui-serif, Georgia, "Iowan Old Style", "Palatino Linotype", "Times New Roman", serif;
    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, "IBM Plex Mono", SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 15px;
    line-height: 1.5;
}

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

code {
    font-family: var(--font-mono);
    background: var(--paper-alt);
    padding: .1em .35em;
    border-radius: 2px;
    font-size: .9em;
}

@media (prefers-reduced-motion: reduce) {
    * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* =========================================================================
   MISE EN PAGE GÉNÉRALE
   ========================================================================= */

.app {
    display: flex;
    min-height: 100vh;
}

.main-col {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.content {
    padding: 22px 28px 48px;
    max-width: 1240px;
    width: 100%;
}

.section-heading {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.15rem;
    margin: 32px 0 14px;
    padding-top: 18px;
    border-top: 1px solid var(--line);
}

.site-footer {
    padding: 18px 28px 26px;
    color: var(--ink-soft);
    font-size: .8rem;
    border-top: 1px solid var(--line);
    margin-top: auto;
}

/* =========================================================================
   BARRE LATÉRALE
   ========================================================================= */

.sidebar {
    width: 232px;
    flex-shrink: 0;
    background: var(--rail);
    color: var(--rail-text);
    padding: 20px 14px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.brand {
    display: flex;
    align-items: baseline;
    gap: 8px;
    padding: 6px 10px 20px;
    color: var(--rail-text);
}

.brand-mark { color: var(--warm); font-size: 1rem; }

.brand-text {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.15rem;
    letter-spacing: .01em;
}

.sidebar-heading {
    font-size: .68rem;
    text-transform: uppercase;
    letter-spacing: .12em;
    color: #9AA396;
    margin: 10px 10px 6px;
}

.quick-access { display: flex; flex-direction: column; gap: 1px; }

.qa-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border-radius: var(--radius);
    color: #D6D2C1;
    font-size: .92rem;
}

.qa-item .icon-sm { width: 17px; height: 17px; flex-shrink: 0; color: #9AA396; }

.qa-item:hover { background: rgba(255,255,255,.06); }

.qa-item.is-active {
    background: var(--accent);
    color: var(--accent-ink);
}
.qa-item.is-active .icon-sm { color: var(--accent-ink); }

.sidebar-footnote {
    margin-top: auto;
    padding: 12px 10px 0;
    font-size: .72rem;
    color: #7C8478;
    border-top: 1px solid rgba(255,255,255,.08);
}

.sidebar-toggle {
    display: none;
    position: fixed;
    top: 14px;
    left: 14px;
    z-index: 40;
    width: 38px;
    height: 38px;
    background: var(--rail);
    border: none;
    border-radius: var(--radius);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    cursor: pointer;
}
.sidebar-toggle span { width: 18px; height: 2px; background: var(--rail-text); border-radius: 1px; }
.sidebar-scrim { display: none; }

/* =========================================================================
   BARRE D'OUTILS SUPÉRIEURE
   ========================================================================= */

.topbar {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 28px;
    border-bottom: 1px solid var(--line);
    background: var(--paper);
    position: sticky;
    top: 0;
    z-index: 10;
    flex-wrap: wrap;
}

.topbar-nav { display: flex; gap: 4px; }

.tb-btn {
    width: 30px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--paper-alt);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    color: var(--ink);
    font-size: 1rem;
    cursor: pointer;
}
.tb-btn:hover { background: var(--paper-deep); }
.tb-btn.is-disabled { opacity: .35; pointer-events: none; }

.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    flex: 1;
    min-width: 160px;
    font-size: .92rem;
}

.crumb { color: var(--ink-soft); padding: 3px 2px; border-radius: 2px; }
.crumb:hover { color: var(--accent); text-decoration: underline; }
.crumb.is-current { color: var(--ink); font-weight: 600; }
.crumb-sep { color: var(--line); }

.search-form {
    display: flex;
    align-items: center;
    background: var(--paper-alt);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 0 4px 0 10px;
}
.search-form input {
    border: none;
    background: transparent;
    padding: 7px 4px;
    font-size: .88rem;
    width: 180px;
    color: var(--ink);
    font-family: var(--font-body);
}
.search-form input:focus { outline: none; }
.search-form button {
    border: none;
    background: transparent;
    color: var(--ink-soft);
    padding: 6px;
    cursor: pointer;
    display: flex;
}
.search-form button:hover { color: var(--accent); }

/* =========================================================================
   BARRE D'OUTILS DE L'EXPLORATEUR (tri / affichage)
   ========================================================================= */

.explorer-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 18px;
}

.view-modes { display: flex; gap: 2px; background: var(--paper-alt); border: 1px solid var(--line); border-radius: var(--radius); padding: 2px; }
.vm-btn {
    width: 28px; height: 26px;
    display: flex; align-items: center; justify-content: center;
    background: transparent; border: none; border-radius: 2px;
    color: var(--ink-soft); cursor: pointer;
}
.vm-btn:hover { color: var(--ink); }
.vm-btn.is-active { background: var(--paper); color: var(--accent); box-shadow: var(--shadow-card); }

.sort-controls { display: flex; align-items: center; gap: 8px; font-size: .85rem; color: var(--ink-soft); }
.sort-controls select {
    font-family: var(--font-body);
    font-size: .85rem;
    padding: 5px 8px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--paper-alt);
    color: var(--ink);
}

/* =========================================================================
   GRILLE ET CARTES — "fiches" de bibliothèque
   ========================================================================= */

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(148px, 1fr));
    gap: 16px;
}

.grid-home { margin-bottom: 8px; }

.grid[data-view="small"] {
    grid-template-columns: repeat(auto-fill, minmax(96px, 1fr));
    gap: 10px;
}

.grid[data-view="list"] {
    grid-template-columns: 1fr;
    gap: 1px;
}

.card {
    position: relative;
    background: var(--paper-alt);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 18px 12px 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 6px;
    box-shadow: var(--shadow-card);
    transition: background .12s ease, transform .12s ease;
}

.card:hover { background: var(--paper-deep); }
.card:active { transform: translateY(1px); }

/* Onglet façon dossier suspendu — différencie clairement les dossiers */
.card-folder::before {
    content: "";
    position: absolute;
    top: -7px;
    left: 16px;
    width: 36px;
    height: 8px;
    background: var(--paper-alt);
    border: 1px solid var(--line);
    border-bottom: none;
    border-radius: 3px 5px 0 0;
}
.card-folder:hover::before { background: var(--paper-deep); }

/* Coin corné façon fiche/document — différencie les fichiers */
.card-file::after {
    content: "";
    position: absolute;
    top: 0; right: 0;
    width: 0; height: 0;
    border-style: solid;
    border-width: 0 14px 14px 0;
    border-color: transparent var(--paper) transparent transparent;
}
.card-file:hover::after { border-color: transparent var(--paper) transparent transparent; }

.card-thumb {
    width: 100%;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.grid[data-view="small"] .card-thumb { height: 34px; }

.card-thumb img {
    max-height: 64px;
    max-width: 100%;
    object-fit: cover;
    border-radius: 2px;
    box-shadow: 0 0 0 1px var(--line);
}
.grid[data-view="small"] .card-thumb img { max-height: 34px; }

.icon { width: 34px; height: 34px; color: var(--ink-soft); }
.card-folder .icon { color: var(--accent); }
.card-pdf .icon, .card-doc .icon { color: var(--warm); }
.icon-sm { width: 18px; height: 18px; }
.icon-empty { width: 46px; height: 46px; color: var(--line); }

.card-name {
    font-size: .86rem;
    font-weight: 500;
    width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.card-meta {
    font-family: var(--font-mono);
    font-size: .72rem;
    color: var(--ink-soft);
}

.card-date {
    font-family: var(--font-mono);
    font-size: .68rem;
    color: var(--ink-soft);
    opacity: .8;
}

/* Vue "liste" : cartes en ligne, comme un tableau simplifié */
.grid[data-view="list"] .card {
    flex-direction: row;
    align-items: center;
    text-align: left;
    padding: 8px 14px;
    border-radius: 0;
    border-left: none; border-right: none; border-top: none;
    gap: 12px;
}
.grid[data-view="list"] .card::before,
.grid[data-view="list"] .card::after { display: none; }
.grid[data-view="list"] .card-thumb { width: 26px; height: 26px; flex-shrink: 0; }
.grid[data-view="list"] .icon { width: 20px; height: 20px; }
.grid[data-view="list"] .card-thumb img { max-height: 26px; width: 26px; object-fit: cover; }
.grid[data-view="list"] .card-name { flex: 1; white-space: nowrap; }
.grid[data-view="list"] .card-meta { width: 90px; text-align: right; }
.grid[data-view="list"] .card-date { width: 90px; text-align: right; }

/* =========================================================================
   ÉTATS VIDES / 404
   ========================================================================= */

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 6px;
    padding: 64px 20px;
    color: var(--ink-soft);
}
.empty-hint { font-size: .85rem; }

.search-summary { color: var(--ink-soft); font-size: .88rem; margin-bottom: 16px; }

/* =========================================================================
   ARTICLES
   ========================================================================= */

.article { max-width: 760px; }

.article-header {
    border-bottom: 1px solid var(--line);
    padding-bottom: 18px;
    margin-bottom: 24px;
}

.article-header h1 {
    font-family: var(--font-display);
    font-size: 2rem;
    margin: 0 0 8px;
}

.article-date {
    font-family: var(--font-mono);
    font-size: .8rem;
    color: var(--warm);
    margin: 0 0 10px;
}

.tag-list { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; padding: 0; margin: 0; }
.tag {
    font-size: .72rem;
    padding: 3px 9px;
    background: var(--paper-alt);
    border: 1px solid var(--line);
    border-radius: 12px;
    color: var(--ink-soft);
}

.article-body { font-size: 1rem; line-height: 1.7; }
.article-body h2 { font-family: var(--font-display); margin-top: 1.8em; }
.article-body img { border-radius: var(--radius); margin: 1em 0; }
.article-body p { margin: 1em 0; }

/* Intégration des formules LaTeX (KaTeX), chargé uniquement quand un
   article en contient. */
.article-body .katex-display {
    margin: 1.3em 0;
    overflow-x: auto;
    overflow-y: hidden;
    padding-bottom: 2px;
}
.article-body .katex { font-size: 1.05em; }

/* =========================================================================
   RESPONSIVE
   ========================================================================= */

@media (max-width: 860px) {
    .sidebar {
        position: fixed;
        inset: 0 auto 0 0;
        z-index: 50;
        transform: translateX(-100%);
        transition: transform .18s ease;
        width: 250px;
    }
    .sidebar.is-open { transform: translateX(0); }

    .sidebar-toggle { display: flex; }

    .sidebar-scrim.is-visible {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(20,24,18,.35);
        z-index: 45;
    }

    .content { padding: 18px 16px 40px; }
    .topbar { padding: 14px 16px 14px 58px; }
    .search-form input { width: 120px; }
}

@media (max-width: 520px) {
    .grid { grid-template-columns: repeat(auto-fill, minmax(122px, 1fr)); gap: 10px; }
    .breadcrumb { order: 3; width: 100%; }
    .search-form { order: 2; }
}