:root{
  --epdf-accent:#0071e3;
  --epdf-accent-contrast:#ffffff;
  --bg:#f5f5f7;
  --surface:#ffffff;
  --border:#e5e5e7;
  --text:#1d1d1f;
  --mut:#6e6e73;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
a{color:var(--epdf-accent);text-decoration:none}
a:hover{text-decoration:underline}

/* ===== Kopfzeile ===== */
.epdf-header{display:flex;align-items:center;gap:14px;padding:18px 24px;background:var(--surface);border-bottom:1px solid var(--border)}
.epdf-header img{height:32px;display:block}
.epdf-header h1{font-size:17px;font-weight:700;margin:0;letter-spacing:-.01em}

/* ===== Archiv-Grid ===== */
.epdf-wrap{max-width:1080px;margin:0 auto;padding:36px 24px 80px}
.epdf-lead{color:var(--mut);font-size:15px;margin:0 0 28px}
.epdf-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:24px}
.epdf-card{display:block;background:var(--surface);border:1px solid var(--border);border-radius:16px;overflow:hidden;transition:transform .18s ease,box-shadow .18s ease}
.epdf-card:hover{transform:translateY(-3px);box-shadow:0 12px 24px rgba(0,0,0,.08);text-decoration:none}
.epdf-card .cover{width:100%;aspect-ratio:3/4;object-fit:cover;background:#eee;display:block}
.epdf-card .body{padding:14px 16px}
.epdf-card .body h3{font-size:14.5px;font-weight:600;margin:0 0 4px;color:var(--text)}
.epdf-card .body p{font-size:12.5px;color:var(--mut);margin:0}
.epdf-empty{color:var(--mut);font-size:15px;padding:40px 0;text-align:center}
.epdf-draft-tag{display:inline-block;font-size:10.5px;font-weight:700;letter-spacing:.03em;background:#fff4e0;color:#8a5a00;padding:2px 8px;border-radius:99px;margin-bottom:6px}

/* ===== Fehlerseiten ===== */
.epdf-error{max-width:480px;margin:80px auto;text-align:center;padding:0 20px}
.epdf-error h1{font-size:22px;margin-bottom:10px}
.epdf-error p{color:var(--mut)}

/* ===== Flipbook-Viewer ===== */
.epdf-viewer-page{height:100%;display:flex;flex-direction:column}
.epdf-toolbar{display:flex;align-items:center;gap:10px;padding:10px 16px;background:var(--surface);border-bottom:1px solid var(--border);flex-wrap:wrap}
.epdf-toolbar .title{font-weight:600;font-size:14px;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.epdf-toolbar button, .epdf-toolbar a.tbtn{
  background:var(--bg);border:1px solid var(--border);color:var(--text);border-radius:8px;
  padding:7px 12px;font-size:13px;cursor:pointer;font-family:inherit;display:inline-flex;align-items:center;gap:6px;
}
.epdf-toolbar button:hover, .epdf-toolbar a.tbtn:hover{border-color:var(--epdf-accent);color:var(--epdf-accent)}
.epdf-toolbar button:disabled{opacity:.4;cursor:default}
.epdf-page-count{font-size:12.5px;color:var(--mut);white-space:nowrap}

.epdf-stage{flex:1;position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden;background:#e9e9eb}
#epdf-book{width:100%;height:100%;max-width:1000px;max-height:100%}

.epdf-loading{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;background:#e9e9eb;z-index:5}
.epdf-spinner{width:34px;height:34px;border-radius:50%;border:3px solid var(--border);border-top-color:var(--epdf-accent);animation:epdf-spin 1s linear infinite}
@keyframes epdf-spin{to{transform:rotate(360deg)}}
.epdf-loading p{color:var(--mut);font-size:13.5px;margin:0}
.epdf-progress{width:200px;height:4px;border-radius:99px;background:var(--border);overflow:hidden}
.epdf-progress > span{display:block;height:100%;background:var(--epdf-accent);width:0%;transition:width .2s ease}

@media (max-width:640px){
  .epdf-toolbar{gap:6px}
  .epdf-toolbar .title{display:none}
}