/* PDF-Bibliothek — Vanilla, ES5-tauglich, dezent dunkel */

:root {
    --bg: #0f1115;
    --bg-elev: #181b22;
    --bg-elev-2: #20242d;
    --border: #2a2f3a;
    --text: #e6e8ee;
    --text-dim: #9aa3b2;
    --accent: #4f8cff;
    --accent-hover: #6ea1ff;
    --green: #38a76a;
    --yellow: #d4a017;
    --red: #e0563f;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}

@media (prefers-color-scheme: light) {
    :root {
        --bg: #f5f6f8;
        --bg-elev: #ffffff;
        --bg-elev-2: #f0f2f5;
        --border: #d8dce4;
        --text: #1a1d24;
        --text-dim: #5a6271;
        --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    }
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: 14px;
    line-height: 1.4;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 14px 24px;
    background: var(--bg-elev);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.topbar h1 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.2px;
}

.topbar-controls {
    display: flex;
    gap: 8px;
    flex: 1;
    max-width: 600px;
    justify-content: flex-end;
}

#search {
    flex: 1;
    min-width: 180px;
    padding: 8px 12px;
    background: var(--bg-elev-2);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 14px;
    outline: none;
}

#search:focus {
    border-color: var(--accent);
}

#sort {
    padding: 8px 10px;
    background: var(--bg-elev-2);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 14px;
    cursor: pointer;
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
}

.status, .empty {
    color: var(--text-dim);
    text-align: center;
    padding: 40px 20px;
}

.grid {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 14px;
}

.card {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: border-color 0.15s, transform 0.15s;
}

.card:hover {
    border-color: var(--accent);
    transform: translateY(-1px);
}

.card-head {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.card-icon {
    flex-shrink: 0;
    width: 36px;
    height: 44px;
    background: var(--bg-elev-2);
    border: 1px solid var(--border);
    border-radius: 4px;
    position: relative;
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 11px;
    letter-spacing: 0.5px;
}

.card-icon::after {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 8px 8px 0;
    border-color: transparent var(--bg) transparent transparent;
}

.card-title {
    flex: 1;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.3;
    word-break: break-word;
    margin: 0;
}

.card-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-dim);
}

.size-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    line-height: 1.4;
}

.size-badge.size-s {
    background: rgba(56, 167, 106, 0.15);
    color: var(--green);
}

.size-badge.size-m {
    background: rgba(212, 160, 23, 0.15);
    color: var(--yellow);
}

.size-badge.size-l {
    background: rgba(224, 86, 63, 0.15);
    color: var(--red);
}

.card-actions {
    display: flex;
    gap: 8px;
    margin-top: auto;
}

.btn {
    flex: 1;
    padding: 8px 12px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--bg-elev-2);
    color: var(--text);
    font-size: 13px;
    font-weight: 500;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: background 0.12s, border-color 0.12s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.btn:hover {
    border-color: var(--accent);
    background: var(--bg-elev);
}

.btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.btn-primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    color: #fff;
}

.hint {
    font-size: 11px;
    color: var(--text-dim);
    line-height: 1.4;
    padding: 6px 10px;
    background: var(--bg-elev-2);
    border-radius: 6px;
    border-left: 3px solid var(--yellow);
}

.hint.hint-large {
    border-left-color: var(--red);
}

.footer {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px 32px;
    color: var(--text-dim);
    font-size: 12px;
    text-align: center;
}

@media (max-width: 600px) {
    .topbar {
        padding: 12px 16px;
    }

    .topbar h1 {
        font-size: 16px;
        flex-basis: 100%;
    }

    main {
        padding: 16px;
    }

    .grid {
        grid-template-columns: 1fr;
    }
}