/* Materialwerk – Oberfläche
   Schriften lokal (IBM Plex, SIL OFL 1.1). Keine externen Ressourcen. */
@font-face { font-family: "MW Sans"; src: url("../fonts/IBMPlexSans-Regular.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "MW Sans"; src: url("../fonts/IBMPlexSans-Italic.woff2") format("woff2"); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: "MW Sans"; src: url("../fonts/IBMPlexSans-SemiBold.woff2") format("woff2"); font-weight: 600; font-style: normal; font-display: swap; }
@font-face { font-family: "MW Sans"; src: url("../fonts/IBMPlexSans-Bold.woff2") format("woff2"); font-weight: 700; font-style: normal; font-display: swap; }
@font-face { font-family: "MW Sans"; src: url("../fonts/IBMPlexSans-BoldItalic.woff2") format("woff2"); font-weight: 700; font-style: italic; font-display: swap; }
@font-face { font-family: "MW Math"; src: url("../fonts/IBMPlexMath-Regular.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "MW Serif"; src: url("../fonts/IBMPlexSerif-Regular.ttf") format("truetype"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "MW Serif"; src: url("../fonts/IBMPlexSerif-Italic.ttf") format("truetype"); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: "MW Serif"; src: url("../fonts/IBMPlexSerif-Bold.ttf") format("truetype"); font-weight: 700; font-style: normal; font-display: swap; }
@font-face { font-family: "MW Serif"; src: url("../fonts/IBMPlexSerif-BoldItalic.ttf") format("truetype"); font-weight: 700; font-style: italic; font-display: swap; }

:root {
  --bg: #f3f4f6; --surface: #ffffff; --surface-2: #f8f9fa; --surface-3: #eef0f3;
  --border: #dfe2e7; --border-strong: #c5cad2;
  --text: #1b1d21; --text-2: #4a4f57; --text-3: #6f7580;
  --accent: #1b6ef3; --accent-hover: #155ed6; --accent-soft: #e7f0fe; --accent-text: #ffffff;
  --ok: #1a7f4b; --ok-soft: #e4f5ec; --warn: #a15c00; --warn-soft: #fdf2e0; --err: #c42b1c; --err-soft: #fdeceb; --info: #2f5aa8; --info-soft: #eaf0fb;
  --chrome: #1c1e22; --chrome-2: #26292e; --chrome-text: #e6e8eb; --chrome-text-2: #9aa1ab; --chrome-active: #33373e;
  --canvas: #d9dce1; --page-shadow: 0 1px 2px rgba(0,0,0,.12), 0 6px 24px rgba(0,0,0,.10);
  --radius: 6px; --radius-lg: 10px; --focus: 0 0 0 3px rgba(27,110,243,.35);
  --font: "MW Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  color-scheme: light;
}
[data-theme="dark"] {
  --bg: #17191c; --surface: #202327; --surface-2: #25292e; --surface-3: #2c3036;
  --border: #353a41; --border-strong: #4a5059;
  --text: #eceef1; --text-2: #b9bec6; --text-3: #8d939c;
  --accent: #4c8dff; --accent-hover: #6aa1ff; --accent-soft: #1f2d46; --accent-text: #0b1220;
  --ok-soft: #173426; --warn-soft: #3a2b12; --err-soft: #3c1d1a; --info-soft: #1c2840;
  --canvas: #2a2d32; color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; font: 14px/1.5 var(--font); color: var(--text); background: var(--bg); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: none; box-shadow: var(--focus); border-radius: 4px; }
h1, h2, h3 { margin: 0 0 .5em; line-height: 1.25; font-weight: 600; }
h1 { font-size: 22px; } h2 { font-size: 17px; } h3 { font-size: 14px; text-transform: none; }
p { margin: 0 0 .8em; }
small, .muted { color: var(--text-3); }
code, .mono { font-family: var(--mono); font-size: 12.5px; }
.ic { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; flex: none; vertical-align: -4px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--accent); color: #fff; padding: 8px 12px; border-radius: 6px; z-index: 1000; }
.skip:focus { left: 8px; }

/* ---------- App-Rahmen ---------- */
.shell { display: grid; grid-template-columns: 232px 1fr; min-height: 100vh; }
.side { background: var(--chrome); color: var(--chrome-text); display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh; }
.brand { display: flex; align-items: center; gap: 10px; padding: 16px 16px 14px; font-weight: 700; letter-spacing: .2px; font-size: 15px; color: #fff; }
.brand-mark { width: 28px; height: 28px; border-radius: 7px; background: linear-gradient(135deg, #2f7bf5, #1b5ed1); display: grid; place-items: center; font-weight: 700; font-size: 14px; color: #fff; }
.nav { padding: 6px 8px; display: flex; flex-direction: column; gap: 2px; flex: 1; overflow: auto; }
.nav a { display: flex; align-items: center; gap: 11px; padding: 8px 10px; border-radius: 6px; color: var(--chrome-text-2); font-weight: 500; }
.nav a:hover { background: var(--chrome-2); color: var(--chrome-text); text-decoration: none; }
.nav a[aria-current="page"] { background: var(--chrome-active); color: #fff; }
.nav .sep { height: 1px; background: #2c3036; margin: 8px 6px; }
.nav .group { font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: #6d747e; padding: 10px 10px 4px; }
.side-foot { padding: 12px 14px; border-top: 1px solid #2c3036; font-size: 12.5px; color: var(--chrome-text-2); display: flex; align-items: center; gap: 8px; }
.side-foot .who { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.side-foot button { background: none; border: 0; color: var(--chrome-text-2); cursor: pointer; padding: 4px; border-radius: 4px; }
.side-foot button:hover { color: #fff; background: var(--chrome-2); }
.main { min-width: 0; display: flex; flex-direction: column; }
.topbar { height: 56px; display: flex; align-items: center; gap: 12px; padding: 0 24px; border-bottom: 1px solid var(--border); background: var(--surface); position: sticky; top: 0; z-index: 20; }
.topbar h1 { font-size: 17px; margin: 0; flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.content { padding: 24px; max-width: 1280px; width: 100%; }
.content.wide { max-width: none; }
.menu-btn { display: none; }

/* ---------- Bausteine ---------- */
.btn { display: inline-flex; align-items: center; gap: 7px; height: 34px; padding: 0 14px; border-radius: var(--radius); border: 1px solid var(--border-strong); background: var(--surface); color: var(--text); font: 500 13.5px var(--font); cursor: pointer; white-space: nowrap; text-decoration: none !important; }
.btn:hover { background: var(--surface-3); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn.primary:hover { background: var(--accent-hover); }
.btn.danger { color: var(--err); border-color: color-mix(in srgb, var(--err) 40%, var(--border)); }
.btn.danger:hover { background: var(--err-soft); }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.ghost:hover { background: var(--surface-3); }
.btn.sm { height: 28px; padding: 0 10px; font-size: 12.5px; }
.btn.icon { width: 32px; padding: 0; justify-content: center; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
.btn-row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 18px 20px; }
.card + .card { margin-top: 16px; }
.card h2 { margin-bottom: 12px; }
.grid { display: grid; gap: 16px; }
.grid.c2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.c3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.c4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.stat { padding: 14px 16px; }
.stat b { display: block; font-size: 24px; font-weight: 600; }
.stat span { color: var(--text-3); font-size: 12.5px; }
.badge { display: inline-flex; align-items: center; gap: 4px; padding: 1px 8px; border-radius: 20px; font-size: 11.5px; font-weight: 600; background: var(--surface-3); color: var(--text-2); white-space: nowrap; }
.badge.ok { background: var(--ok-soft); color: var(--ok); } .badge.warn { background: var(--warn-soft); color: var(--warn); }
.badge.err { background: var(--err-soft); color: var(--err); } .badge.info { background: var(--info-soft); color: var(--info); }
.badge.accent { background: var(--accent-soft); color: var(--accent); }
.alert { padding: 11px 14px; border-radius: var(--radius); border: 1px solid; margin-bottom: 14px; display: flex; gap: 10px; align-items: flex-start; }
.alert.success { background: var(--ok-soft); border-color: color-mix(in srgb, var(--ok) 35%, transparent); color: var(--text); }
.alert.error { background: var(--err-soft); border-color: color-mix(in srgb, var(--err) 35%, transparent); }
.alert.warning { background: var(--warn-soft); border-color: color-mix(in srgb, var(--warn) 35%, transparent); }
.alert.info { background: var(--info-soft); border-color: color-mix(in srgb, var(--info) 30%, transparent); }
.alert .ic { margin-top: 1px; }
.empty { text-align: center; padding: 42px 20px; color: var(--text-3); }
.empty .ic { width: 40px; height: 40px; stroke-width: 1.3; margin-bottom: 8px; color: var(--border-strong); }
.empty h3 { color: var(--text); font-size: 15px; }

/* Formulare */
label { display: block; font-weight: 500; margin-bottom: 4px; font-size: 13px; color: var(--text-2); }
.field { margin-bottom: 14px; }
.field .hint { font-size: 12px; color: var(--text-3); margin-top: 4px; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=url], input[type=search], input[type=date], select, textarea {
  width: 100%; height: 34px; padding: 6px 10px; border: 1px solid var(--border-strong); border-radius: var(--radius); background: var(--surface); color: var(--text); font: 13.5px var(--font);
}
textarea { height: auto; min-height: 72px; resize: vertical; line-height: 1.45; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: var(--focus); }
input[type=checkbox], input[type=radio] { accent-color: var(--accent); width: 16px; height: 16px; vertical-align: -3px; }
.check { display: flex; align-items: center; gap: 8px; font-weight: 400; color: var(--text); }
.row { display: flex; gap: 12px; } .row > * { flex: 1; min-width: 0; }
fieldset { border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px; margin: 0 0 14px; }
legend { font-weight: 600; padding: 0 6px; font-size: 13px; }

/* Tabellen */
.table-wrap { overflow-x: auto; }
table.tbl { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.tbl th { text-align: left; font-weight: 600; color: var(--text-2); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; padding: 9px 10px; border-bottom: 1px solid var(--border); background: var(--surface-2); position: sticky; top: 0; }
.tbl td { padding: 9px 10px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.tbl tr:hover td { background: var(--surface-2); }
.tbl .actions { text-align: right; white-space: nowrap; }
.doc-title { font-weight: 600; color: var(--text); }
.doc-sub { font-size: 12px; color: var(--text-3); }
.type-dot { width: 30px; height: 30px; border-radius: 7px; display: inline-grid; place-items: center; font-size: 11px; font-weight: 700; color: #fff; flex: none; }
.t-worksheet { background: #2f7bf5; } .t-infosheet { background: #0f8a7a; } .t-quiz { background: #b4690e; } .t-test { background: #c2410c; } .t-exam { background: #7c3aed; } .t-solution { background: #4b5563; }
.cell-doc { display: flex; gap: 10px; align-items: center; }
.fav { background: none; border: 0; cursor: pointer; color: var(--text-3); padding: 2px; }
.fav.on { color: #d79b00; } .fav.on .ic { fill: currentColor; }

/* Filterleiste */
.filters { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; align-items: center; }
.filters input[type=search] { width: 260px; }
.filters select { width: auto; min-width: 140px; }
.segmented { display: inline-flex; border: 1px solid var(--border-strong); border-radius: var(--radius); overflow: hidden; }
.segmented a, .segmented button { padding: 6px 12px; color: var(--text-2); border: 0; background: var(--surface); font: 500 13px var(--font); cursor: pointer; }
.segmented a + a, .segmented button + button { border-left: 1px solid var(--border-strong); }
.segmented [aria-current="true"], .segmented .on { background: var(--accent-soft); color: var(--accent); }
.split { display: grid; grid-template-columns: 220px 1fr; gap: 20px; align-items: start; }
.folder-list { list-style: none; margin: 0; padding: 0; }
.folder-list a { display: flex; gap: 8px; align-items: center; padding: 6px 8px; border-radius: 6px; color: var(--text-2); }
.folder-list a:hover { background: var(--surface-3); text-decoration: none; }
.folder-list a[aria-current="true"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

/* Vorlagen-Kacheln */
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; }
.tile { border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--surface); padding: 14px; display: flex; flex-direction: column; gap: 8px; position: relative; transition: border-color .12s, box-shadow .12s; }
.tile:hover { border-color: var(--accent); box-shadow: 0 2px 10px rgba(27,110,243,.12); }
.tile .thumb { height: 120px; border-radius: 6px; background: var(--surface-3); display: grid; place-items: center; overflow: hidden; }
.tile .thumb svg.mw-page { height: 112px; width: auto; box-shadow: 0 1px 3px rgba(0,0,0,.15); }
.tile h3 { margin: 0; font-size: 14px; }
.tile p { margin: 0; font-size: 12.5px; color: var(--text-3); flex: 1; }
.tile input[type=radio] { position: absolute; top: 12px; right: 12px; }
.tile.selected { border-color: var(--accent); box-shadow: var(--focus); }
.cat-title { font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: var(--text-3); margin: 22px 0 10px; font-weight: 600; }

/* Dialoge, Toasts */
dialog { border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 0; background: var(--surface); color: var(--text); width: min(560px, 94vw); box-shadow: 0 20px 60px rgba(0,0,0,.25); }
dialog::backdrop { background: rgba(17,19,23,.45); }
.dlg-head { padding: 16px 20px 6px; display: flex; align-items: center; gap: 8px; }
.dlg-head h2 { margin: 0; flex: 1; }
.dlg-body { padding: 10px 20px; max-height: 70vh; overflow: auto; }
.dlg-foot { padding: 12px 20px 16px; display: flex; gap: 8px; justify-content: flex-end; }
.toasts { position: fixed; right: 18px; bottom: 18px; display: flex; flex-direction: column; gap: 8px; z-index: 2000; }
.toast { background: var(--chrome); color: #fff; padding: 10px 14px; border-radius: 8px; box-shadow: 0 8px 24px rgba(0,0,0,.25); max-width: 420px; font-size: 13px; animation: tin .18s ease-out; }
.toast.err { background: #9f2117; } .toast.ok { background: #14653d; }
@keyframes tin { from { transform: translateY(8px); opacity: 0; } }
.progress { height: 8px; background: var(--surface-3); border-radius: 8px; overflow: hidden; }
.progress > div { height: 100%; background: var(--accent); width: 0; transition: width .3s; }
.log { font-family: var(--mono); font-size: 12px; background: var(--surface-2); border: 1px solid var(--border); border-radius: 6px; padding: 10px; max-height: 260px; overflow: auto; white-space: pre-wrap; }
.checklist { list-style: none; margin: 0; padding: 0; }
.checklist li { display: flex; gap: 10px; padding: 8px 0; border-bottom: 1px solid var(--border); align-items: flex-start; }
.checklist li:last-child { border-bottom: 0; }
.checklist .st { width: 20px; flex: none; text-align: center; font-weight: 700; }
.st.ok { color: var(--ok); } .st.warning { color: var(--warn); } .st.error { color: var(--err); } .st.info, .st.check { color: var(--info); }

/* Auth / Installer */
.auth { min-height: 100vh; display: grid; place-items: center; padding: 24px; background: radial-gradient(1200px 600px at 20% -10%, #dbe7ff 0, transparent 60%), var(--bg); }
[data-theme="dark"] .auth { background: var(--bg); }
.auth-card { width: min(420px, 100%); background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 28px; box-shadow: 0 12px 40px rgba(20,30,60,.08); }
.auth-card.wide { width: min(720px, 100%); }
.auth-card .brand { color: var(--text); padding: 0 0 18px; }
.steps { display: flex; gap: 6px; margin-bottom: 20px; flex-wrap: wrap; }
.steps span { font-size: 12px; padding: 3px 10px; border-radius: 20px; background: var(--surface-3); color: var(--text-3); }
.steps span.on { background: var(--accent); color: #fff; } .steps span.done { background: var(--ok-soft); color: var(--ok); }

/* ---------- Editor ---------- */
body.editor-page { overflow: hidden; }
.editor { display: grid; grid-template-columns: 264px 1fr 340px; grid-template-rows: 48px 1fr; height: 100vh; }
.ed-bar { grid-column: 1 / 4; display: flex; align-items: center; gap: 6px; padding: 0 10px; background: var(--chrome); color: var(--chrome-text); border-bottom: 1px solid #000; }
.ed-bar .btn { background: transparent; border-color: transparent; color: var(--chrome-text); }
.ed-bar .btn:hover { background: var(--chrome-2); }
.ed-bar .btn.primary { background: var(--accent); color: #fff; }
.ed-bar .btn.primary:hover { background: var(--accent-hover); }
.ed-bar .title-input { background: transparent; border: 1px solid transparent; color: #fff; font-weight: 600; font-size: 14px; width: 320px; height: 32px; }
.ed-bar .title-input:hover { border-color: #3a3f47; }
.ed-bar .title-input:focus { background: #111316; border-color: var(--accent); }
.ed-bar .sp { flex: 1; }
.ed-bar .divider { width: 1px; height: 24px; background: #3a3f47; margin: 0 4px; }
.save-state { font-size: 12px; color: var(--chrome-text-2); display: flex; align-items: center; gap: 6px; min-width: 150px; }
.save-state .dot { width: 8px; height: 8px; border-radius: 50%; background: #3fb46f; }
.save-state.dirty .dot { background: #e0a020; } .save-state.saving .dot { background: #4c8dff; animation: pulse 1s infinite; } .save-state.error .dot { background: #e5484d; }
@keyframes pulse { 50% { opacity: .35; } }
.ed-bar select { width: auto; height: 30px; background: #2a2d33; border-color: #3a3f47; color: #fff; font-size: 12.5px; }
.ed-left, .ed-right { background: var(--surface); overflow: auto; border-right: 1px solid var(--border); }
.ed-right { border-right: 0; border-left: 1px solid var(--border); }
.panel-tabs { display: flex; border-bottom: 1px solid var(--border); position: sticky; top: 0; background: var(--surface); z-index: 2; }
.panel-tabs button { flex: 1; padding: 10px 6px; background: none; border: 0; border-bottom: 2px solid transparent; color: var(--text-3); font: 600 12px var(--font); cursor: pointer; text-transform: uppercase; letter-spacing: .05em; }
.panel-tabs button[aria-selected="true"] { color: var(--text); border-bottom-color: var(--accent); }
.panel { padding: 12px; }
.panel h3 { font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: var(--text-3); margin: 14px 0 8px; }
.panel h3:first-child { margin-top: 2px; }
.insert-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px; }
.insert-grid button { display: flex; align-items: center; gap: 8px; padding: 8px; min-width: 0; hyphens: auto; -webkit-hyphens: auto; line-height: 1.2; border: 1px solid var(--border); background: var(--surface); border-radius: 6px; cursor: pointer; font: 500 12.5px var(--font); color: var(--text-2); text-align: left; }
.insert-grid button:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.outline { list-style: none; margin: 0; padding: 0; }
.outline li { padding: 5px 8px; border-radius: 5px; font-size: 12.5px; color: var(--text-2); cursor: pointer; display: flex; gap: 6px; align-items: center; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.outline li:hover { background: var(--surface-3); }
.outline li.on { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.outline li .lvl { width: calc(var(--d, 0) * 12px); flex: none; }
.ed-center { background: var(--canvas); overflow: auto; position: relative; display: flex; flex-direction: column; }
.view-bar { position: sticky; top: 0; z-index: 5; display: flex; gap: 8px; align-items: center; padding: 8px 14px; background: color-mix(in srgb, var(--canvas) 88%, transparent); backdrop-filter: blur(6px); border-bottom: 1px solid rgba(0,0,0,.06); }
.view-bar .sp { flex: 1; }
.workspace { display: grid; grid-template-columns: minmax(420px, 1fr) minmax(0, 620px); gap: 20px; padding: 18px 20px 80px; align-items: start; }
.workspace.preview-only { grid-template-columns: 1fr; justify-items: center; }
.workspace.blocks-only { grid-template-columns: minmax(0, 860px); justify-content: center; }
.workspace.preview-only .blocks-col, .workspace.blocks-only .preview-col { display: none; }
.preview-col { position: sticky; top: 64px; max-height: calc(100vh - 130px); overflow: auto; padding-bottom: 20px; }
.pages { display: flex; flex-direction: column; gap: 14px; align-items: center; }
.pages svg.mw-page { width: 100%; max-width: 600px; height: auto; background: #fff; box-shadow: var(--page-shadow); border-radius: 2px; }
.page-label { font-size: 11px; color: var(--text-3); align-self: center; }
.issues { margin: 0 0 12px; display: flex; flex-direction: column; gap: 6px; }
.issue { font-size: 12.5px; padding: 7px 10px; border-radius: 6px; background: var(--surface); border-left: 3px solid var(--warn); cursor: pointer; }
.issue.error { border-left-color: var(--err); } .issue.info { border-left-color: var(--info); }

/* Blöcke */
.blocks { display: flex; flex-direction: column; gap: 8px; }
.blk { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; position: relative; transition: border-color .1s, box-shadow .1s; }
.blk:hover { border-color: var(--border-strong); }
.blk.sel { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.blk.locked { background: repeating-linear-gradient(135deg, var(--surface), var(--surface) 8px, var(--surface-2) 8px, var(--surface-2) 16px); }
.blk-head { display: flex; align-items: center; gap: 6px; padding: 6px 8px; border-bottom: 1px solid var(--border); font-size: 12px; color: var(--text-3); }
.blk-head .kind { font-weight: 600; color: var(--text-2); text-transform: uppercase; letter-spacing: .05em; font-size: 11px; }
.blk-head .sp { flex: 1; }
.blk-head .tools { display: flex; gap: 2px; opacity: .55; }
.blk:hover .blk-head .tools, .blk.sel .blk-head .tools, .blk-head .tools:focus-within { opacity: 1; }
.tbtn { width: 26px; height: 26px; border: 0; background: none; border-radius: 4px; color: var(--text-2); cursor: pointer; display: grid; place-items: center; }
.tbtn:hover { background: var(--surface-3); color: var(--text); }
.tbtn .ic { width: 15px; height: 15px; }
.blk-body { padding: 10px 12px; }
.blk-body textarea, .blk-body input[type=text] { font-size: 13.5px; }
.blk-body textarea.rich { min-height: 56px; }
.blk .children { padding: 8px 8px 10px 14px; display: flex; flex-direction: column; gap: 8px; border-top: 1px dashed var(--border); background: var(--surface-2); border-radius: 0 0 8px 8px; }
.blk .children > .add-row { display: flex; gap: 6px; flex-wrap: wrap; }
.sub-wrap { border-left: 3px solid var(--accent-soft); padding-left: 10px; }
.sub-head { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 12.5px; color: var(--text-2); margin-bottom: 6px; }
.sol-chip { font-size: 11px; padding: 1px 7px; border-radius: 10px; font-weight: 600; cursor: pointer; border: 0; }
.sol-none { background: var(--err-soft); color: var(--err); } .sol-suggested { background: var(--warn-soft); color: var(--warn); }
.sol-edited { background: var(--info-soft); color: var(--info); } .sol-checked { background: var(--ok-soft); color: var(--ok); } .sol-unsupported { background: var(--surface-3); color: var(--text-3); }
.sol-stale { background: var(--err-soft); color: var(--err); }
.formula-preview { min-height: 30px; padding: 6px 8px; background: var(--surface-2); border-radius: 6px; margin-top: 6px; overflow-x: auto; }
.formula-preview svg { max-width: 100%; height: auto; }
.mini-preview { display: flex; flex-wrap: wrap; gap: 4px; align-items: center; }
.drop-hint { height: 3px; background: var(--accent); border-radius: 2px; }
.add-between { display: flex; justify-content: center; height: 8px; position: relative; }
.add-between button { position: absolute; top: -9px; opacity: 0; transition: opacity .12s; }
.add-between:hover button, .add-between button:focus { opacity: 1; }
.chip-btn { border: 1px dashed var(--border-strong); background: var(--surface); color: var(--text-2); border-radius: 6px; padding: 4px 10px; font: 500 12px var(--font); cursor: pointer; }
.chip-btn:hover { border-color: var(--accent); color: var(--accent); }
.props .field { margin-bottom: 10px; }
.props label { font-size: 12px; }
.prop-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.palette { display: flex; flex-wrap: wrap; gap: 4px; }
.palette button { min-width: 30px; height: 28px; padding: 0 6px; border: 1px solid var(--border); background: var(--surface); border-radius: 5px; cursor: pointer; font: 14px "MW Math", var(--font); color: var(--text); }
.palette button:hover { border-color: var(--accent); background: var(--accent-soft); }
.palette-tabs { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 6px; }
.palette-tabs button { font-size: 11px; padding: 2px 8px; border: 1px solid var(--border); background: var(--surface-2); border-radius: 12px; cursor: pointer; color: var(--text-2); }
.palette-tabs button.on { background: var(--accent); color: #fff; border-color: var(--accent); }
math-field { display: block; width: 100%; font-size: 20px; padding: 6px 8px; border: 1px solid var(--border-strong); border-radius: 6px; background: var(--surface); color: var(--text); }
math-field:focus-within { border-color: var(--accent); box-shadow: var(--focus); }
.swatches { display: flex; gap: 6px; flex-wrap: wrap; }
.swatches button { width: 24px; height: 24px; border-radius: 50%; border: 2px solid var(--surface); box-shadow: 0 0 0 1px var(--border-strong); cursor: pointer; }
.swatches button.on { box-shadow: 0 0 0 2px var(--accent); }
.graph-el { border: 1px solid var(--border); border-radius: 6px; padding: 8px; margin-bottom: 6px; background: var(--surface-2); }
.graph-el .row { gap: 6px; margin-bottom: 6px; }
.graph-el input, .graph-el select { height: 28px; font-size: 12.5px; padding: 3px 7px; }
.review-list li { cursor: pointer; }
.kbd { font-family: var(--mono); font-size: 11px; border: 1px solid var(--border-strong); border-bottom-width: 2px; border-radius: 4px; padding: 0 4px; }

/* Responsiv */
@media (max-width: 1280px) {
  .editor { grid-template-columns: 220px 1fr 300px; }
  .workspace { grid-template-columns: 1fr; }
  .workspace .preview-col { position: static; max-height: none; }
}
@media (max-width: 1024px) {
  .grid.c4 { grid-template-columns: repeat(2, 1fr); } .grid.c3 { grid-template-columns: 1fr 1fr; }
  .editor { grid-template-columns: 1fr 300px; }
  .ed-left { display: none; }
  .editor.show-left .ed-left { display: block; position: fixed; left: 0; top: 48px; bottom: 0; width: 280px; z-index: 30; box-shadow: 8px 0 24px rgba(0,0,0,.2); }
  .ed-bar .title-input { width: 180px; }
}
@media (max-width: 820px) {
  .shell { grid-template-columns: 1fr; }
  .side { position: fixed; left: -260px; width: 240px; z-index: 50; transition: left .2s; }
  .shell.nav-open .side { left: 0; box-shadow: 8px 0 30px rgba(0,0,0,.3); }
  .menu-btn { display: inline-flex; }
  .content { padding: 16px; }
  .grid.c2, .grid.c3, .grid.c4 { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; }
  .filters input[type=search] { width: 100%; }
  .hide-sm { display: none !important; }
  .editor { grid-template-columns: 1fr; grid-template-rows: 48px 1fr; }
  .ed-right { display: none; }
  .editor.show-right .ed-right { display: block; position: fixed; right: 0; top: 48px; bottom: 0; width: min(340px, 92vw); z-index: 30; }
  .workspace { padding: 10px; }
  .ed-bar .hide-sm { display: none; }
}
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }
@media print { .side, .topbar { display: none; } }
/* Breitenbegrenzung: Inhalte dürfen Rasterspalten nicht aufweiten (Tablet) */
.shell > *, .split > *, .grid > * { min-width: 0; }
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
@media (max-width: 1280px) { .split { grid-template-columns: 1fr; } }