/* =====================================================================
   Fernleihstatistik – Oberfläche
   ===================================================================== */
:root {
  --bg: #f4f6f7;
  --surface: #ffffff;
  --surface-2: #f8fafa;
  --border: #e1e6e8;
  --border-strong: #c9d2d6;
  --text: #1c2b30;
  --muted: #5f7076;
  --primary: #0f5f73;
  --primary-600: #0b4d5e;
  --primary-50: #e7f2f4;
  --accent: #e08a1e;
  --success: #2f7d4f;
  --success-bg: #e8f5ec;
  --error: #b3263a;
  --error-bg: #fbeaec;
  --heat-rgb: 15, 95, 115;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 40, 48, .06), 0 4px 16px rgba(16, 40, 48, .05);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1719;
    --surface: #162126;
    --surface-2: #1b282d;
    --border: #26363c;
    --border-strong: #35494f;
    --text: #e3ecee;
    --muted: #93a7ad;
    --primary: #4fb3c8;
    --primary-600: #6cc4d6;
    --primary-50: #1b3238;
    --success: #6fcf97;
    --success-bg: #173226;
    --error: #f08a99;
    --error-bg: #3a1c22;
    --heat-rgb: 79, 179, 200;
    --shadow: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.5 var(--font); min-height: 100vh; display: flex; flex-direction: column;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .4em; letter-spacing: -.01em; }
h1 { font-size: 1.55rem; }
h2 { font-size: 1.08rem; }
p { margin: 0 0 .8em; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.strong { font-weight: 650; }
.nowrap { white-space: nowrap; }

/* ---------- Kopfleiste ---------- */
.topbar { background: var(--primary); color: #fff; position: sticky; top: 0; z-index: 20; }
@media (prefers-color-scheme: dark) { .topbar { background: #0c3a46; } }
.topbar-inner { max-width: 1400px; margin: 0 auto; padding: 0 20px; display: flex; align-items: center; gap: 24px; min-height: 60px; }
.brand { display: flex; align-items: center; gap: 12px; color: #fff; text-decoration: none !important; }
.brand-mark { display: inline-flex; align-items: flex-end; gap: 3px; height: 26px; padding: 4px 5px; background: rgba(255,255,255,.14); border-radius: 7px; }
.brand-mark i { display: block; width: 5px; background: #fff; border-radius: 1px; }
.brand-mark i:nth-child(1) { height: 8px; } .brand-mark i:nth-child(2) { height: 13px; } .brand-mark i:nth-child(3) { height: 18px; background: var(--accent); }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 1rem; }
.brand-text small { opacity: .75; font-size: .76rem; }
.mainnav { display: flex; gap: 2px; margin-left: auto; flex-wrap: wrap; }
.mainnav a { color: rgba(255,255,255,.85); padding: 8px 12px; border-radius: 7px; font-weight: 500; text-decoration: none; }
.mainnav a:hover { background: rgba(255,255,255,.12); color: #fff; }
.mainnav a.active { background: rgba(255,255,255,.18); color: #fff; }
.mainnav .nav-logout { margin-left: 10px; border: 1px solid rgba(255,255,255,.3); }
.nav-toggle { display: none; margin-left: auto; background: none; border: 0; color: #fff; font-size: 1.5rem; cursor: pointer; }

.page { flex: 1; width: 100%; max-width: 1400px; margin: 0 auto; padding: 24px 20px 40px; }
.footer { text-align: center; color: var(--muted); font-size: .8rem; padding: 18px; border-top: 1px solid var(--border); }

.page-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px 24px; flex-wrap: wrap; margin-bottom: 18px; }
.page-head p { margin: 0; }
.title-num { display: inline-grid; place-items: center; width: 1.6em; height: 1.6em; margin-right: .45em; border-radius: 7px;
  background: var(--primary-50); color: var(--primary); font-size: .75em; vertical-align: .12em; }

/* ---------- Karten ---------- */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px 20px; margin-bottom: 18px; }
.card-accent { border-top: 3px solid var(--accent); }
.card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.card-head h2 { margin: 0; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.two-col > .card { margin-bottom: 18px; }
.two-col.wide-left { grid-template-columns: 2fr 1fr; }
.empty-state { text-align: center; color: var(--muted); padding: 40px; }
.note { color: var(--muted); font-size: .85rem; margin: 12px 0 0; }

/* ---------- Kennzahlen ---------- */
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; margin-bottom: 18px; }
.kpi { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; box-shadow: var(--shadow); }
.kpi span { display: block; color: var(--muted); font-size: .82rem; }
.kpi strong { display: block; font-size: 1.7rem; font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.kpi strong.kpi-text { font-size: 1.05rem; padding-top: .45em; }
.kpi small { color: var(--muted); font-size: .78rem; }
.kpi small.up { color: var(--success); } .kpi small.down { color: var(--error); }
.kpis-inline { display: flex; gap: 10px; margin: 0; }
.kpis-inline .kpi { padding: 8px 14px; min-width: 96px; }
.kpis-inline .kpi strong { font-size: 1.25rem; }

/* ---------- Formulare ---------- */
input, select, textarea, button { font: inherit; color: inherit; }
input[type=text], input[type=search], input[type=password], input[type=date], select, textarea {
  width: 100%; padding: 8px 10px; border: 1px solid var(--border-strong); border-radius: 8px; background: var(--surface); min-height: 38px;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(var(--heat-rgb), .18); }
.field { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.field > span { font-size: .82rem; font-weight: 600; color: var(--muted); }
.field.has-error input, .field.has-error select { border-color: var(--error); background: var(--error-bg); }
.field.has-error > span { color: var(--error); }
.grid-form { display: grid; grid-template-columns: repeat(12, 1fr); gap: 14px; }
.col-1 { grid-column: span 1; } .col-2 { grid-column: span 2; } .col-3 { grid-column: span 3; } .col-4 { grid-column: span 4; }
.col-6 { grid-column: span 6; } .col-7 { grid-column: span 7; } .col-12 { grid-column: span 12; }
.stack { display: flex; flex-direction: column; gap: 14px; }
.input-group { display: flex; gap: 8px; }
.input-group .grow, .grow { flex: 1; }
.form-actions { display: flex; gap: 10px; align-items: center; margin-top: 16px; }
.entry-form .grid-form { margin-top: 6px; }
.pubmed-row { display: flex; gap: 16px; align-items: flex-end; padding-bottom: 14px; margin-bottom: 14px; border-bottom: 1px dashed var(--border); flex-wrap: wrap; }
.pubmed-row .field { max-width: 520px; }
.pubmed-status { margin: 0 0 8px; font-size: .88rem; }
.pubmed-status.ok { color: var(--success); } .pubmed-status.err { color: var(--error); }
.filters { display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end; }
.filters .field { min-width: 130px; }
.filters .field.grow { min-width: 220px; }
.filter-actions { display: flex; gap: 8px; }
.toolbar { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.toolbar label { display: flex; gap: 6px; align-items: center; font-size: .88rem; color: var(--muted); }
.toolbar select { width: auto; min-height: 34px; padding: 5px 8px; }
.toolbar-plain { margin-top: 14px; }
.query-form .grid-form { align-items: end; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 8px 14px; border-radius: 8px;
  border: 1px solid var(--border-strong); background: var(--surface); cursor: pointer; font-weight: 550; white-space: nowrap; min-height: 38px; text-decoration: none !important; color: var(--text); }
.btn:hover { background: var(--surface-2); border-color: var(--primary); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-600); border-color: var(--primary-600); color: #fff; }
@media (prefers-color-scheme: dark) { .btn-primary, .btn-primary:hover { color: #0f1719; } }
.btn-ghost { background: transparent; border-color: transparent; color: var(--primary); }
.btn-ghost:hover { background: var(--primary-50); border-color: transparent; }
.btn-sm { padding: 4px 10px; min-height: 30px; font-size: .85rem; }
.btn-lg { padding: 11px 22px; font-size: 1.02rem; }
.btn-block { width: 100%; }
.icon-btn { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 7px; border: 1px solid transparent;
  background: transparent; color: var(--primary); cursor: pointer; text-decoration: none !important; font-size: .95rem; }
.icon-btn:hover { background: var(--primary-50); }
.icon-btn.danger { color: var(--error); } .icon-btn.danger:hover { background: var(--error-bg); }
form.inline { display: inline; }
.input-sm { width: 220px !important; min-height: 32px !important; padding: 5px 9px !important; }

/* ---------- Hinweise ---------- */
.alert { padding: 12px 16px; border-radius: 9px; margin-bottom: 16px; border: 1px solid; }
.alert ul { margin: 6px 0 0; padding-left: 20px; }
.alert-success { background: var(--success-bg); border-color: color-mix(in srgb, var(--success) 35%, transparent); color: var(--success); }
.alert-error { background: var(--error-bg); border-color: color-mix(in srgb, var(--error) 35%, transparent); color: var(--error); }

/* ---------- Tabellen ---------- */
.table-wrap { overflow-x: auto; margin: 0 -20px; padding: 0 20px; }
.table-tools { display: flex; gap: 8px; align-items: center; justify-content: flex-end; margin-bottom: 10px; flex-wrap: wrap; }
.card-head .table-tools { margin: 0; }
table.data { width: 100%; border-collapse: separate; border-spacing: 0; font-size: .9rem; font-variant-numeric: tabular-nums; }
table.data th, table.data td { padding: 8px 10px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
table.data thead th { position: sticky; top: 0; background: var(--surface-2); font-size: .8rem; color: var(--muted); font-weight: 650;
  border-bottom: 1px solid var(--border-strong); white-space: nowrap; z-index: 1; }
table.data tbody tr:hover > * { background: var(--primary-50); }
table.data tfoot th, table.data tfoot td { font-weight: 650; border-top: 2px solid var(--border-strong); border-bottom: 0; background: var(--surface-2); }
table.data tbody th { font-weight: 600; }
table.data.compact th, table.data.compact td { padding: 5px 8px; }
table.data .num { text-align: right; white-space: nowrap; }
table.data .actions { text-align: right; width: 1%; }
table.data .empty { text-align: center; color: var(--muted); padding: 30px; }
table.data .group-row th { text-align: center; color: var(--text); border-bottom: 0; }
table.data .group-row th.group { border-left: 2px solid var(--border-strong); background: var(--primary-50); color: var(--primary); }
table.data .group-end { border-right: 2px solid var(--border-strong); }
table.data .hl { background: color-mix(in srgb, var(--primary-50) 60%, transparent); }
table.data .zero { color: var(--border-strong); }
table.data .title-cell { min-width: 240px; max-width: 460px; }
table.data .kst-cell { min-width: 200px; }
table.data .kst-cell .muted { font-size: .85em; }
table.data .na { background: repeating-linear-gradient(135deg, transparent 0 6px, var(--surface-2) 6px 12px); }
table.data .special-row td { background: color-mix(in srgb, var(--accent) 8%, transparent); }
table.data .muted-row { color: var(--muted); }
table.data tr.is-editing > td { background: color-mix(in srgb, var(--accent) 12%, transparent); }
table.sticky-first td:first-child, table.sticky-first th:first-child { position: sticky; left: 0; background: var(--surface); z-index: 2; }
table.sticky-first thead th:first-child { background: var(--surface-2); z-index: 3; }
table.heatmap td[style] { background: rgba(var(--heat-rgb), var(--heat)); }
th a.sort, th[data-sort] { color: inherit; cursor: pointer; user-select: none; text-decoration: none; }
th[data-sort]:hover, th a.sort:hover { color: var(--primary); }
th[data-sort-dir="asc"]::after { content: " ▲"; font-size: .75em; }
th[data-sort-dir="desc"]::after { content: " ▼"; font-size: .75em; }
.tag { display: inline-block; padding: 1px 8px; border-radius: 99px; background: var(--primary-50); color: var(--primary); font-size: .78rem; font-weight: 600; white-space: nowrap; }

tr.expandable { cursor: pointer; }
tr.expandable .caret { display: inline-block; width: 1em; color: var(--muted); transition: transform .15s; }
tr.expandable.open .caret { transform: rotate(90deg); }
tr.detail > td { background: var(--surface-2); padding: 12px 16px 16px 30px; }
table.mini { border-collapse: collapse; font-size: .85rem; margin-bottom: 8px; background: var(--surface); }
table.mini th, table.mini td { border: 1px solid var(--border); padding: 4px 9px; }
table.mini th { background: var(--surface-2); font-weight: 600; font-size: .78rem; color: var(--muted); }

.pager { display: flex; gap: 4px; justify-content: center; flex-wrap: wrap; margin-top: 16px; }
.pager a, .pager span { padding: 5px 11px; border-radius: 7px; border: 1px solid var(--border); min-width: 36px; text-align: center; }
.pager a:hover { border-color: var(--primary); text-decoration: none; }
.pager .current { background: var(--primary); border-color: var(--primary); color: #fff; font-weight: 650; }
.pager .gap { border: 0; color: var(--muted); }

/* ---------- Statistik-Bereich ---------- */
.stat-layout { display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: 24px; align-items: start; }
.stat-nav { position: sticky; top: 84px; display: flex; flex-direction: column; gap: 2px; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 8px; box-shadow: var(--shadow); }
.stat-nav a { display: flex; gap: 10px; align-items: flex-start; padding: 8px 10px; border-radius: 7px; color: var(--text); font-size: .9rem; line-height: 1.3; text-decoration: none; }
.stat-nav a:hover { background: var(--surface-2); }
.stat-nav a.active { background: var(--primary-50); color: var(--primary); font-weight: 600; }
.stat-nav .num { flex: none; display: inline-grid; place-items: center; width: 22px; height: 22px; border-radius: 6px; background: var(--surface-2);
  font-size: .75rem; font-weight: 700; color: var(--muted); }
.stat-nav a.active .num { background: var(--primary); color: #fff; }
.stat-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.stat-card { display: flex; flex-direction: column; gap: 4px; padding: 16px; border-radius: var(--radius); background: var(--surface);
  border: 1px solid var(--border); color: var(--text); box-shadow: var(--shadow); text-decoration: none !important; transition: border-color .15s, transform .15s; }
.stat-card:hover { border-color: var(--primary); transform: translateY(-1px); }
.stat-card .num { color: var(--accent); font-weight: 800; font-size: .85rem; }
.stat-card small { color: var(--muted); }

.letters { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 16px; }
.letters a { min-width: 34px; padding: 5px 8px; text-align: center; border-radius: 7px; background: var(--surface); border: 1px solid var(--border);
  font-weight: 600; font-size: .88rem; text-decoration: none; }
.letters a:hover { border-color: var(--primary); }
.letters a.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ---------- Diagramme (SVG aus app.js) ---------- */
.chart { width: 100%; min-height: 300px; position: relative; }
.chart-sm { min-height: 220px; }
.chart svg { display: block; width: 100%; height: auto; overflow: visible; }
.chart text { fill: var(--muted); font-size: 11px; font-family: var(--font); }
.chart .axis line, .chart .grid line { stroke: var(--border); }
.chart .bar:hover, .chart .seg:hover { opacity: .8; }
.chart .value-label { fill: var(--text); font-weight: 600; }
.legend { display: flex; flex-wrap: wrap; gap: 6px 14px; margin-top: 10px; font-size: .82rem; color: var(--muted); }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend i { width: 11px; height: 11px; border-radius: 3px; display: inline-block; }
.chart-tip { position: absolute; pointer-events: none; background: var(--text); color: var(--surface); padding: 6px 9px; border-radius: 7px;
  font-size: .8rem; white-space: nowrap; transform: translate(-50%, -110%); opacity: 0; transition: opacity .1s; z-index: 5; }

/* ---------- Chips / Autocomplete ---------- */
.chips-input { display: flex; flex-wrap: wrap; gap: 6px; padding: 5px; border: 1px solid var(--border-strong); border-radius: 8px; background: var(--surface); min-height: 38px; }
.chips-input:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(var(--heat-rgb), .18); }
.chips-input input { border: 0 !important; box-shadow: none !important; flex: 1; min-width: 200px; min-height: 28px; padding: 3px 6px; }
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 3px 6px 3px 10px; border-radius: 99px; background: var(--primary-50);
  color: var(--primary); font-weight: 600; font-size: .85rem; border: 0; cursor: default; }
.chip button { border: 0; background: none; color: inherit; cursor: pointer; font-size: 1rem; line-height: 1; padding: 0 3px; }
button.chip { cursor: pointer; padding: 4px 10px; }
button.chip small { color: var(--muted); font-weight: 500; }
.chip-list { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; padding: 0; margin: 0; }
.ac-wrap { position: relative; }
.ac-list { position: absolute; left: 0; right: 0; top: calc(100% + 4px); z-index: 30; background: var(--surface); border: 1px solid var(--border-strong);
  border-radius: 9px; box-shadow: 0 8px 30px rgba(0,0,0,.14); max-height: 320px; overflow-y: auto; padding: 4px; margin: 0; list-style: none; }
.ac-list li { padding: 7px 10px; border-radius: 6px; cursor: pointer; font-size: .9rem; }
.ac-list li.active, .ac-list li:hover { background: var(--primary-50); color: var(--primary); }
.ac-list mark { background: none; color: inherit; font-weight: 700; }

/* ---------- Datenpflege ---------- */
.merge-group { border: 1px solid var(--border); border-radius: 9px; padding: 12px 14px; margin-bottom: 10px; }
.merge-head { margin-bottom: 6px; font-size: .9rem; color: var(--muted); }
.radio-row { display: flex; gap: 10px; align-items: baseline; padding: 3px 0; }
.radio-row span { flex: 1; }
.inline-edit { display: flex; gap: 8px; align-items: center; }

.login-card { max-width: 420px; margin: 40px auto; padding: 28px; }

/* ---------- Responsiv ---------- */
@media (max-width: 1100px) {
  .stat-layout { grid-template-columns: 1fr; }
  .stat-nav { position: static; flex-direction: row; flex-wrap: wrap; }
  .stat-nav a { flex: 1 1 220px; }
  .two-col, .two-col.wide-left { grid-template-columns: 1fr; }
}
@media (max-width: 900px) {
  .grid-form { grid-template-columns: repeat(6, 1fr); }
  .col-1, .col-2 { grid-column: span 2; } .col-3, .col-4 { grid-column: span 3; } .col-6, .col-7, .col-12 { grid-column: span 6; }
}
@media (max-width: 760px) {
  .topbar-inner { flex-wrap: wrap; padding: 8px 16px; }
  .nav-toggle { display: block; }
  .mainnav { display: none; width: 100%; flex-direction: column; padding-bottom: 8px; }
  .mainnav.open { display: flex; }
  .mainnav .nav-logout { margin-left: 0; }
  .page { padding: 16px 16px 32px; }
  .card { padding: 14px 16px; }
  .table-wrap { margin: 0 -16px; padding: 0 16px; }
  .kpis-inline { width: 100%; } .kpis-inline .kpi { flex: 1; min-width: 0; }
  .grid-form { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .grid-form > * { grid-column: span 2 !important; }
  .grid-form > .col-1, .grid-form > .col-2 { grid-column: span 1 !important; }
  .input-sm { width: 100% !important; }
  .table-tools { justify-content: stretch; }
  .input-group { flex-wrap: wrap; }
  .inline-edit { flex-wrap: wrap; }
}
@media print {
  .topbar, .stat-nav, .toolbar, .table-tools, .letters, .footer, .actions, .filters { display: none !important; }
  .stat-layout { display: block; }
  .card { box-shadow: none; border: 0; padding: 0; }
  body { background: #fff; }
}
table.data.heatmap tbody tr:hover > td[style] { background: rgba(var(--heat-rgb), var(--heat)); box-shadow: inset 0 -2px 0 var(--primary); }