:root {
  color-scheme: light dark;
  --bg: #f3f4f6; --surface: #ffffff; --surface2: #f9fafb; --border: #d9dde3; --text: #1f2933; --muted: #637083;
  --accent: #2563eb; --accent-text: #ffffff; --danger: #c62828; --ok: #2e7d32; --warn: #b45309;
  --shadow: 0 1px 2px rgba(0,0,0,.08), 0 1px 3px rgba(0,0,0,.06);
  --c0: #8a94a3; --c1: #2563eb; --c2: #d97706; --c3: #7c3aed; --c4: #2e7d32; --c5: #0891b2; --c6: #db2777;
  --t-story: #2563eb; --t-task: #d97706; --t-bug: #c62828;
  --radius: 10px; --tap: 44px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #12151a; --surface: #1b2027; --surface2: #222831; --border: #333b47; --text: #e6e9ee; --muted: #97a1af;
    --accent: #5b8def; --accent-text: #0b1220; --danger: #ef7676; --ok: #6fcf7a; --warn: #f0a24b;
    --shadow: 0 1px 2px rgba(0,0,0,.5);
    --c0: #9aa4b2; --c1: #5b8def; --c2: #f0a24b; --c3: #a78bfa; --c4: #6fcf7a; --c5: #4cc3dc; --c6: #f472b6;
    --t-story: #5b8def; --t-task: #f0a24b; --t-bug: #ef7676;
  }
}
:root[data-theme="dark"] {
  --bg: #12151a; --surface: #1b2027; --surface2: #222831; --border: #333b47; --text: #e6e9ee; --muted: #97a1af;
  --accent: #5b8def; --accent-text: #0b1220; --danger: #ef7676; --ok: #6fcf7a; --warn: #f0a24b;
  --shadow: 0 1px 2px rgba(0,0,0,.5);
  --c0: #9aa4b2; --c1: #5b8def; --c2: #f0a24b; --c3: #a78bfa; --c4: #6fcf7a; --c5: #4cc3dc; --c6: #f472b6;
  --t-story: #5b8def; --t-task: #f0a24b; --t-bug: #ef7676;
}
:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"] { color-scheme: dark; }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
[hidden] { display: none !important; }
a { color: var(--accent); }

/* Bedienelemente */
.btn { min-height: var(--tap); min-width: var(--tap); padding: 0 16px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface); display: inline-flex; align-items: center; justify-content: center; gap: 6px; }
.btn:hover { background: var(--surface2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }
.btn.danger { color: var(--danger); }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.small { min-height: 36px; padding: 0 10px; font-size: 14px; }
.btn[disabled] { opacity: .5; cursor: default; }
input[type=text], input[type=email], input[type=password], input[type=number], select, textarea {
  width: 100%; min-height: var(--tap); padding: 8px 12px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
textarea { min-height: 96px; resize: vertical; }
input:focus-visible, select:focus-visible, textarea:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
label.f { display: block; font-size: 13px; color: var(--muted); margin: 12px 0 4px; }
.row { display: flex; gap: 8px; align-items: center; }
.row.wrap { flex-wrap: wrap; }
.grow { flex: 1; min-width: 0; }
.muted { color: var(--muted); }
.err { color: var(--danger); min-height: 1.4em; margin: 8px 0 0; }

/* Login */
.login-wrap { min-height: 100dvh; display: grid; place-items: center; padding: 16px; }
.login-card { width: 100%; max-width: 380px; background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 24px; box-shadow: var(--shadow); }
.login-card h1 { margin: 0 0 4px; font-size: 24px; }

/* Kopfzeile */
header.top { position: sticky; top: 0; z-index: 20; background: var(--surface); border-bottom: 1px solid var(--border);
  padding: 8px 12px; padding-top: calc(8px + env(safe-area-inset-top)); display: flex; align-items: center; gap: 8px; }
header.top h1 { font-size: 18px; margin: 0 8px 0 0; }
.tabs { display: flex; gap: 4px; flex: 1; overflow-x: auto; }
.tab { min-height: var(--tap); padding: 0 14px; border: 0; background: transparent; border-radius: var(--radius); color: var(--muted); font-weight: 600; white-space: nowrap; }
.tab[aria-current=page] { background: var(--surface2); color: var(--accent); box-shadow: inset 0 -3px 0 var(--accent); }
main { padding: 12px; padding-bottom: 100px; max-width: 1600px; margin: 0 auto; }

/* Filterleiste */
.filters { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.filters .search { flex: 1 1 200px; }
.filters select { flex: 1 1 130px; width: auto; }
.ftoggle { display: none; }

/* Karten & Badges */
.card { background: var(--surface); border: 1px solid var(--border); border-left: 4px solid var(--t-story); border-radius: var(--radius); padding: 10px 12px;
  box-shadow: var(--shadow); cursor: pointer; min-height: var(--tap); }
.card.type-task { border-left-color: var(--t-task); } .card.type-bug { border-left-color: var(--t-bug); }
.card:hover { border-color: var(--accent); border-left-width: 4px; }
.card .title { font-weight: 600; overflow-wrap: anywhere; }
.card .meta { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; margin-top: 6px; font-size: 12.5px; color: var(--muted); }
.badge { display: inline-flex; align-items: center; gap: 4px; padding: 1px 8px; border-radius: 99px; background: var(--surface2); border: 1px solid var(--border); font-size: 12px; }
.badge.type-story { color: var(--t-story); } .badge.type-task { color: var(--t-task); } .badge.type-bug { color: var(--t-bug); }
.prio { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.prio-1 { background: var(--danger); } .prio-2 { background: var(--warn); } .prio-3 { background: var(--c1); } .prio-4 { background: var(--c0); }
.avatar { width: 22px; height: 22px; border-radius: 50%; background: var(--accent); color: var(--accent-text); display: inline-grid; place-items: center; font-size: 11px; font-weight: 700; }
.dragging { opacity: .4; }
.drop-before { box-shadow: 0 -3px 0 var(--accent); }
.drop-after { box-shadow: 0 3px 0 var(--accent); }
.col.drop-target .col-body { outline: 2px dashed var(--accent); outline-offset: -4px; }

/* Board */
.col-tabs { display: none; }
.board { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(260px, 1fr); gap: 12px; align-items: start; overflow-x: auto; padding-bottom: 8px; }
.col { background: var(--surface2); border: 1px solid var(--border); border-radius: 12px; min-height: 120px; display: flex; flex-direction: column; }
.col-head { padding: 10px 12px; display: flex; align-items: center; gap: 8px; font-weight: 700; border-top: 4px solid var(--col, var(--c0)); border-radius: 12px 12px 0 0; }
.col-head .count { font-weight: 500; color: var(--muted); font-size: 13px; }
.col-head .over { color: var(--danger); font-weight: 700; }
.col-body { padding: 8px; display: flex; flex-direction: column; gap: 8px; flex: 1; min-height: 60px; }
.empty { color: var(--muted); text-align: center; padding: 16px 8px; font-size: 14px; }

/* Backlog */
.list { display: flex; flex-direction: column; gap: 8px; max-width: 900px; margin: 0 auto; }
.item { display: flex; gap: 8px; align-items: stretch; }
.item .card { flex: 1; min-width: 0; }
.mover { display: flex; flex-direction: column; gap: 4px; }
.mover .btn { min-height: 40px; padding: 0 10px; }
.status-chip { border-left: 3px solid var(--col, var(--c0)); padding-left: 6px; }
.handle { display: none; }

/* FAB */
.fab { position: fixed; right: 16px; bottom: calc(16px + env(safe-area-inset-bottom)); width: 60px; height: 60px; border-radius: 50%; border: 0; z-index: 30;
  background: var(--accent); color: var(--accent-text); font-size: 34px; line-height: 1; box-shadow: 0 4px 14px rgba(0,0,0,.35); }

/* Dialoge */
dialog { border: 1px solid var(--border); border-radius: 14px; background: var(--surface); color: var(--text); padding: 0; width: min(680px, 100vw - 24px); max-height: 92dvh; box-shadow: 0 10px 40px rgba(0,0,0,.4); }
dialog::backdrop { background: rgba(0,0,0,.5); }
.dlg-head { display: flex; align-items: center; gap: 8px; padding: 10px 12px; border-bottom: 1px solid var(--border); position: sticky; top: 0; background: var(--surface); z-index: 2; }
.dlg-head h2 { margin: 0; font-size: 17px; flex: 1; }
.dlg-body { padding: 4px 16px 16px; overflow-y: auto; max-height: calc(92dvh - 130px); }
.dlg-foot { display: flex; gap: 8px; justify-content: flex-end; padding: 10px 12px; border-top: 1px solid var(--border); }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 12px; }
.seg { display: flex; gap: 6px; flex-wrap: wrap; }
.seg label { flex: 1; }
.seg input { position: absolute; opacity: 0; }
.seg span { display: flex; min-height: var(--tap); align-items: center; justify-content: center; border: 1px solid var(--border); border-radius: var(--radius); padding: 0 10px; }
.seg input:checked + span { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }
.seg input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.md { overflow-wrap: anywhere; }
.md > :first-child { margin-top: 0; } .md > :last-child { margin-bottom: 0; }
.md pre { background: var(--surface2); padding: 8px; border-radius: 8px; overflow-x: auto; }
.md code { background: var(--surface2); padding: 1px 4px; border-radius: 4px; }
.md img { max-width: 100%; }
.md table { border-collapse: collapse; } .md td, .md th { border: 1px solid var(--border); padding: 4px 8px; }
.mdbox { border: 1px solid var(--border); border-radius: var(--radius); padding: 8px 12px; background: var(--surface2); min-height: 44px; }
.note { border: 1px solid var(--border); border-radius: var(--radius); padding: 8px 12px; margin: 8px 0; background: var(--surface2); }
.note .who { font-size: 12.5px; color: var(--muted); display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.act { font-size: 13px; color: var(--muted); padding: 4px 0; border-bottom: 1px dashed var(--border); }
h3.sec { font-size: 14px; margin: 20px 0 4px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }

/* Admin */
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 12px 16px; margin: 0 auto 16px; max-width: 900px; }
.panel h2 { margin: 4px 0 8px; font-size: 18px; }
.urow { display: grid; grid-template-columns: 1fr; gap: 8px; padding: 10px 0; border-top: 1px solid var(--border); }
.urow:first-of-type { border-top: 0; }

.toast { position: fixed; left: 50%; transform: translateX(-50%); bottom: calc(90px + env(safe-area-inset-bottom)); background: var(--text); color: var(--bg);
  padding: 10px 16px; border-radius: 10px; z-index: 100; max-width: 90vw; box-shadow: var(--shadow); }
.menu { position: absolute; right: 8px; top: calc(56px + env(safe-area-inset-top)); background: var(--surface); border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow);
  padding: 6px; min-width: 200px; z-index: 40; display: flex; flex-direction: column; }
.menu .btn { justify-content: flex-start; border: 0; background: transparent; }
.menu .who { padding: 8px 12px; border-bottom: 1px solid var(--border); margin-bottom: 4px; }

/* Smartphone: eine Spalte zur Zeit */
@media (max-width: 767px) {
  .filters .search { flex: 1 1 0; }
  .ftoggle { display: inline-flex; }
  .filters.collapsed .fsel { display: none; }
  .filters:not(.collapsed) .fsel { flex-basis: 45%; }
  .col-tabs { display: flex; gap: 6px; overflow-x: auto; margin-bottom: 10px; padding-bottom: 2px; }
  .col-tab { flex: 0 0 auto; min-height: var(--tap); padding: 0 14px; border-radius: 99px; border: 1px solid var(--border); background: var(--surface); border-bottom: 4px solid var(--col, var(--c0)); }
  .col-tab[aria-selected=true] { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 700; }
  .board { display: block; overflow: visible; }
  .col { display: none; background: transparent; border: 0; }
  .col.active { display: flex; }
  .col-head { display: none; }
  .col-body { padding: 0; }
  header.top .brand small { display: none; }
  header.top { gap: 2px; padding-left: 8px; padding-right: 4px; }
  header.top .brand .zeyu { height: 14px; }
  .tab { padding: 0 9px; font-size: 15px; }
  #menuBtn { padding: 0 6px; min-width: 40px; }
  dialog { width: 100vw; max-width: 100vw; height: 100dvh; max-height: 100dvh; border-radius: 0; border: 0; }
  .dlg-body { max-height: none; height: calc(100dvh - 125px); }
  dialog[open] { display: flex; flex-direction: column; }
  dialog[open] > form, dialog[open] > div.wrapper { display: flex; flex-direction: column; height: 100%; }
}
@media (min-width: 768px) {
  .handle { display: inline-grid; place-items: center; width: 28px; cursor: grab; color: var(--muted); }
}
@media (prefers-reduced-motion: no-preference) { .card { transition: border-color .15s; } }

/* Drag & Drop */
.card { -webkit-touch-callout: none; -webkit-user-select: none; user-select: none; }
.card.ghost { opacity: .92; transform: scale(1.03); box-shadow: 0 8px 24px rgba(0,0,0,.45); }
.col-tab.drop-tab { outline: 3px solid var(--accent); outline-offset: 1px; }

/* Backlog: Priorität + Sortierung */
.side { display: flex; flex-direction: column; gap: 4px; width: 98px; flex: none; }
.side select { min-height: 40px; padding: 4px 6px; font-size: 14px; }
.side .arrows { display: flex; gap: 4px; }
.side .arrows .btn { flex: 1; min-width: 0; min-height: 40px; padding: 0; }
.sortbar { max-width: 420px; }
.sortbar span { min-height: 40px; font-size: 14px; }

/* ZEYU-Wortmarke (Maske, übernimmt die Textfarbe in hell/dunkel) */
.zeyu { display: inline-block; aspect-ratio: 2630 / 480; background: currentColor;
  -webkit-mask: url(/open/zeyu-wordmark.svg) no-repeat center / contain; mask: url(/open/zeyu-wordmark.svg) no-repeat center / contain; }
header.top .brand { display: flex; align-items: center; gap: 8px; color: var(--text); text-decoration: none; margin-right: 4px; }
header.top .brand .zeyu { height: 16px; }
header.top .brand small { font-size: 13px; font-weight: 600; color: var(--muted); }
.login-card .zeyu { height: 26px; display: block; margin: 0 0 14px; }
.login-card h1 { font-size: 20px; }

.theme-float { position: fixed; top: calc(8px + env(safe-area-inset-top)); right: 8px; }

/* Hell/Dunkel-Schalter */
.tswitch { position: relative; flex: none; width: 60px; height: 44px; padding: 0; border: 0; background: transparent; cursor: pointer; display: grid; place-items: center; }
.tswitch::before { content: ""; position: absolute; width: 56px; height: 30px; border-radius: 99px; background: var(--surface2); border: 1px solid var(--border); }
.tswitch .ti { position: absolute; top: 50%; transform: translateY(-50%); font-size: 14px; line-height: 1; color: var(--muted); z-index: 1; }
.tswitch .ti:nth-of-type(1) { left: 11px; } .tswitch .ti:nth-of-type(2) { right: 11px; }
.tswitch .knob { position: absolute; top: 50%; left: 7px; width: 24px; height: 24px; margin-top: -12px; border-radius: 50%; background: var(--accent); box-shadow: var(--shadow); transition: transform .18s; z-index: 2; }
.tswitch[aria-checked=true] .knob { transform: translateX(26px); }
.tswitch .ti { z-index: 3; mix-blend-mode: normal; }
.tswitch[aria-checked=false] .ti:nth-of-type(1), .tswitch[aria-checked=true] .ti:nth-of-type(2) { color: var(--accent-text); }
@media (prefers-reduced-motion: reduce) { .tswitch .knob { transition: none; } }
@media (max-width: 767px) {
  .tswitch { width: 44px; } .tswitch::before { width: 42px; height: 26px; }
  .tswitch .ti { font-size: 11px; } .tswitch .ti:nth-of-type(1) { left: 9px; } .tswitch .ti:nth-of-type(2) { right: 9px; }
  .tswitch .knob { left: 6px; width: 20px; height: 20px; margin-top: -10px; } .tswitch[aria-checked=true] .knob { transform: translateX(18px); }
  .tab { padding: 0 7px; font-size: 14.5px; }
}

/* ===== Stil „ZEYU“ (Testdesign nach zeyu.pro): fast schwarz, Eisblau, kantig mit geschnittenen Ecken ===== */
:root[data-skin="zeyu"] {
  --bg: #f3f5f7; --surface: #ffffff; --surface2: #eaeef2; --border: #cfd6df; --text: #060708; --muted: #5b6573;
  --accent: #2a7fb8; --accent-text: #ffffff; --prim-bg: #060708; --prim-fg: #ffffff; --ice: #8ccbf2;
  --radius: 0px; --cut: 10px; --shadow: none;
}
@media (prefers-color-scheme: dark) {
  :root[data-skin="zeyu"]:not([data-theme="light"]) {
    --bg: #060708; --surface: #101318; --surface2: #0b0d10; --border: #222730; --text: #f3f5f7; --muted: #8e99a8;
    --accent: #8ccbf2; --accent-text: #060708; --prim-bg: #ffffff; --prim-fg: #060708;
    --danger: #ff7b7b; --shadow: none;
  }
}
:root[data-skin="zeyu"][data-theme="dark"] {
  --bg: #060708; --surface: #101318; --surface2: #0b0d10; --border: #222730; --text: #f3f5f7; --muted: #8e99a8;
  --accent: #8ccbf2; --accent-text: #060708; --prim-bg: #ffffff; --prim-fg: #060708;
  --danger: #ff7b7b; --shadow: none;
}
:root[data-skin="zeyu"] .btn.primary { background: var(--prim-bg); border-color: var(--prim-bg); color: var(--prim-fg); }
:root[data-skin="zeyu"] .btn,
:root[data-skin="zeyu"] .tab { text-transform: uppercase; letter-spacing: .09em; font-weight: 700; font-size: 12.5px; }
:root[data-skin="zeyu"] .btn.small { font-size: 11.5px; }
:root[data-skin="zeyu"] .tab { border-radius: 0; }
:root[data-skin="zeyu"] .tab[aria-current=page] { background: transparent; color: var(--text); box-shadow: inset 0 -2px 0 var(--ice); }
:root[data-skin="zeyu"] .btn.ghost { text-transform: none; }
:root[data-skin="zeyu"] header.top { background: var(--bg); border-bottom: 1px solid var(--border); }
:root[data-skin="zeyu"] header.top::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--ice) 30%, var(--ice) 70%, transparent); opacity: .45; }
:root[data-skin="zeyu"] .col-head, :root[data-skin="zeyu"] h3.sec, :root[data-skin="zeyu"] .panel h2, :root[data-skin="zeyu"] .dlg-head h2 {
  text-transform: uppercase; letter-spacing: .1em; font-size: 13px; font-weight: 800; }
:root[data-skin="zeyu"] .col-head { border-top-width: 2px; border-radius: 0; }
:root[data-skin="zeyu"] .col-tab { border-radius: 0; text-transform: uppercase; letter-spacing: .06em; font-size: 12.5px; font-weight: 700; }
:root[data-skin="zeyu"] .col-tab[aria-selected=true] { background: var(--prim-bg); color: var(--prim-fg); border-color: var(--prim-bg); }
:root[data-skin="zeyu"] .login-card h1 { text-transform: uppercase; letter-spacing: .12em; font-size: 14px; color: var(--muted); }
:root[data-skin="zeyu"] .badge { border-radius: 0; font-size: 11px; letter-spacing: .04em; }
:root[data-skin="zeyu"] .avatar { border-radius: 0; background: var(--ice); color: #060708; clip-path: polygon(5px 0, 100% 0, 100% calc(100% - 5px), calc(100% - 5px) 100%, 0 100%, 0 5px); }
:root[data-skin="zeyu"] .card { border-left-width: 3px; }
:root[data-skin="zeyu"] .card:hover { border-color: var(--ice); }
:root[data-skin="zeyu"] .seg input:checked + span { background: var(--prim-bg); border-color: var(--prim-bg); color: var(--prim-fg); }
:root[data-skin="zeyu"] .tswitch::before, :root[data-skin="zeyu"] .tswitch .knob { border-radius: 0; }
:root[data-skin="zeyu"] .fab { border-radius: 0; background: var(--prim-bg); color: var(--prim-fg); box-shadow: none; }
:root[data-skin="zeyu"] .toast { border-radius: 0; }
:root[data-skin="zeyu"] ::selection { background: var(--ice); color: #060708; }
:root[data-skin="zeyu"] dialog { border-radius: 0; box-shadow: none; }
/* geschnittene Ecke oben links / unten rechts (wie die Buttons auf zeyu.pro) */
:root[data-skin="zeyu"] .btn:not(.ghost):not(.small):not(.tswitch),
:root[data-skin="zeyu"] .card, :root[data-skin="zeyu"] .col, :root[data-skin="zeyu"] .panel,
:root[data-skin="zeyu"] .login-card, :root[data-skin="zeyu"] .fab, :root[data-skin="zeyu"] .menu {
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut)); }
:root[data-skin="zeyu"] .btn:focus-visible, :root[data-skin="zeyu"] .card:focus-visible { clip-path: none; }
:root[data-skin="zeyu"] .card.dragging, :root[data-skin="zeyu"] .card.ghost { clip-path: none; }
:root[data-skin="zeyu"] .card[class*="drop-"], :root[data-skin="zeyu"] .col.drop-target, :root[data-skin="zeyu"] .col-tab.drop-tab { clip-path: none; }
:root[data-skin="zeyu"] .item[class*="drop-"] .card { clip-path: none; }

/* Projektwahl */
.projbar { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.projbar .projname { font-weight: 700; font-size: 17px; }
.projbar select { width: auto; min-width: 200px; max-width: 100%; font-weight: 700; font-size: 17px; }
@media (max-width: 767px) { .projbar select { width: 100%; } }
input[type=checkbox] { width: 22px; height: 22px; flex: none; accent-color: var(--accent); }
@media (max-width: 767px) {
  :root[data-skin="zeyu"] .tab { letter-spacing: .03em; font-size: 11.5px; padding: 0 6px; }
}

/* Tasks einer User Story */
.tasklink { display: flex; align-items: center; gap: 8px; width: 100%; min-height: 44px; padding: 6px 10px; margin: 4px 0; text-align: left;
  background: var(--surface2); border: 1px solid var(--border); border-radius: var(--radius); cursor: pointer; }
.tasklink:hover { border-color: var(--accent); }
.tasklink .grow { overflow-wrap: anywhere; }