:root {
  --red: #B3141E;
  --red-ink: #8E0F17;
  --red-soft: #F8E6E7;
  --grey: #87888A;
  --ink: #23262B;
  --ink-2: #4A4E55;
  --line: #DCDEE1;
  --surface: #F1F2F4;
  --paper: #FFFFFF;
  --ok: #2F7D57; --ok-soft: #E2F2E9;
  --part: #A86E0C; --part-soft: #FBF0DA;
  --miss: #B3141E; --miss-soft: #F8E6E7;
  --focus: #1F5FBF;
  --radius-s: 6px;
  --radius-m: 10px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI Variable Text", "Segoe UI", system-ui, sans-serif;
  --tap: 44px;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body { font: 15px/1.45 var(--font); color: var(--ink); background: var(--surface); -webkit-text-size-adjust: 100%; }
[x-cloak] { display: none !important; }
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
h1, h2, h3 { line-height: 1.2; margin: 0; }
h1 { font-size: 26px; font-weight: 700; letter-spacing: -0.01em; }
h2 { font-size: 18px; font-weight: 650; }
h3 { font-size: 15px; font-weight: 650; }
.muted { color: var(--grey); }
.small { font-size: 13px; }
.num { font-variant-numeric: tabular-nums; }

/* ---------- Buttons & Felder */
.btn { min-height: var(--tap); padding: 0 16px; border-radius: var(--radius-s); border: 1px solid var(--line); background: var(--paper);
  cursor: pointer; display: inline-flex; align-items: center; gap: 8px; text-decoration: none; white-space: nowrap; }
.btn:hover { border-color: #B9BCC1; }
.btn.primary { background: var(--ink); color: #fff; border-color: var(--ink); }
.btn.primary:hover { background: #000; }
.btn.accent { background: var(--red); color: #fff; border-color: var(--red); }
.btn.accent:hover { background: var(--red-ink); }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.ghost:hover { background: rgba(0,0,0,.05); }
.btn.danger { color: var(--red); }
.btn.sm { min-height: 34px; padding: 0 10px; font-size: 14px; }
.btn:disabled { opacity: .45; cursor: default; }
.field { display: grid; gap: 4px; }
.field > span { font-size: 13px; color: var(--ink-2); }
input[type=text], input[type=password], input[type=date], input[type=number], input[type=search], select, textarea {
  min-height: var(--tap); padding: 8px 12px; border: 1px solid var(--line); border-radius: var(--radius-s); background: var(--paper); width: 100%; }
textarea { min-height: 80px; resize: vertical; line-height: 1.45; }
input:focus, select:focus, textarea:focus { border-color: var(--focus); outline: none; box-shadow: 0 0 0 3px rgba(31,95,191,.15); }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.grow { flex: 1; }
.stack { display: grid; gap: 14px; }

/* ---------- Login */
.login { min-height: 100vh; display: grid; place-items: center; padding: 24px; background: var(--paper); }
.login form { width: min(380px, 100%); display: grid; gap: 14px; }
.login img { width: 230px; margin: 0 auto 18px; display: block; }
.login .divider { text-align: center; color: var(--grey); font-size: 13px; }
.error { color: var(--red); font-size: 14px; }

/* ---------- Shell */
.topbar { position: sticky; top: 0; z-index: 20; background: var(--paper); border-bottom: 1px solid var(--line);
  display: flex; align-items: center; gap: 6px; padding: 0 16px; height: 56px; }
.topbar img { height: 30px; margin-right: 14px; }
.topbar nav { display: flex; gap: 2px; }
.topbar nav a { padding: 0 14px; height: 56px; display: flex; align-items: center; text-decoration: none; color: var(--ink-2); border-bottom: 3px solid transparent; }
.topbar nav a.on { color: var(--ink); border-bottom-color: var(--red); font-weight: 600; }
.topbar .spacer { flex: 1; }
.page { max-width: 1100px; margin: 0 auto; padding: 28px 20px 80px; }
.page-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }

.panel { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-m); padding: 18px; }
.list { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-m); }
.list > .item { display: flex; align-items: center; gap: 14px; padding: 14px 18px; border-top: 1px solid var(--line); }
.list > .item:first-child { border-top: none; }
.list .title { font-weight: 600; }
.empty { padding: 36px 18px; text-align: center; color: var(--ink-2); }
.progress { width: 120px; height: 6px; background: var(--surface); border-radius: 3px; overflow: hidden; }
.progress > i { display: block; height: 100%; background: var(--ok); }
.badge { display: inline-block; font-size: 12px; padding: 2px 8px; border-radius: 99px; background: var(--surface); color: var(--ink-2); }
.badge.nta { background: #E7EEF9; color: #234E8C; }
.badge.fertig { background: var(--ok-soft); color: var(--ok); }
.badge.in_arbeit { background: var(--part-soft); color: var(--part); }

/* ---------- Klausur-Editor */
.part { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-m); margin-bottom: 18px; }
.part > header { display: flex; align-items: center; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.part .pnum { width: 30px; height: 30px; border-radius: 50%; background: var(--ink); color: #fff; display: grid; place-items: center; font-weight: 700; flex: none; }
.part > .body { padding: 16px 18px; display: grid; gap: 16px; }
.option { border: 1px solid var(--line); border-radius: var(--radius-s); padding: 14px; display: grid; gap: 12px; }
.option > .ohead { display: flex; align-items: center; gap: 10px; }
.section-edit { border-left: 3px solid var(--line); padding-left: 12px; display: grid; gap: 8px; }
.item-edit { display: grid; grid-template-columns: 1fr auto auto; gap: 8px; align-items: start; }
.item-edit textarea { min-height: var(--tap); height: var(--tap); }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: var(--radius-s); overflow: hidden; background: var(--paper); }
.seg button { border: 0; background: transparent; min-height: 40px; padding: 0 12px; cursor: pointer; border-left: 1px solid var(--line); font-size: 14px; }
.seg button:first-child { border-left: 0; }
.seg button.on { background: var(--ink); color: #fff; }
.savebar { position: sticky; bottom: 0; background: var(--paper); border-top: 1px solid var(--line); padding: 12px 20px; display: flex; justify-content: flex-end; gap: 10px; margin: 0 -20px; }

/* ---------- Korrektur */
.korr-bar { position: sticky; top: 56px; z-index: 15; background: var(--paper); border-bottom: 1px solid var(--line);
  display: flex; align-items: center; gap: 10px; padding: 8px 16px; flex-wrap: wrap; }
.korr-bar select.student { width: auto; min-width: 240px; font-weight: 600; }
.saved { font-size: 13px; color: var(--grey); min-width: 90px; }
.korr { display: grid; grid-template-columns: minmax(0, 1fr) 420px; gap: 20px; padding: 20px; max-width: 1500px; margin: 0 auto; align-items: start; }
.side { position: sticky; top: 124px; max-height: calc(100vh - 140px); overflow: auto; background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-m); }
@media (max-width: 1100px) {
  .korr { grid-template-columns: 1fr; }
  .side { position: static; max-height: none; }
}

.kpart { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-m); margin-bottom: 18px; overflow: hidden; }
.kpart > header { padding: 14px 18px; display: flex; gap: 12px; align-items: center; flex-wrap: wrap; border-bottom: 1px solid var(--line); }
.kpart details { padding: 10px 18px; border-bottom: 1px solid var(--line); background: #FAFAFB; }
.kpart summary { cursor: pointer; color: var(--ink-2); font-size: 14px; }
.kpart .task { white-space: pre-wrap; margin-top: 8px; }
.ksec { padding: 12px 18px 4px; font-weight: 650; font-size: 14px; color: var(--ink-2); }
.kitem { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 10px; align-items: center; padding: 8px 18px; border-left: 4px solid transparent; }
.kitem:focus-visible { outline: none; background: #F3F6FC; border-left-color: var(--focus); }
.kitem.r-ok { border-left-color: var(--ok); }
.kitem.r-partial { border-left-color: var(--part); }
.kitem.r-missing { border-left-color: var(--miss); }
.kitem .txt.w2 { font-weight: 650; }
.kitem .txt.w05 { color: var(--ink-2); }
.kitem .noteinput { grid-column: 1 / -1; }
.rate { display: inline-flex; gap: 4px; }
.rate button { width: 44px; height: 40px; border: 1px solid var(--line); background: var(--paper); border-radius: var(--radius-s); cursor: pointer; font-size: 17px; color: var(--ink-2); }
.rate button.ok.on { background: var(--ok); border-color: var(--ok); color: #fff; }
.rate button.partial.on { background: var(--part); border-color: var(--part); color: #fff; }
.rate button.missing.on { background: var(--miss); border-color: var(--miss); color: #fff; }
.rate button.note { font-size: 14px; }
.rate button.note.has { border-color: var(--ink); color: var(--ink); }
.kfoot { padding: 14px 18px 16px; border-top: 1px solid var(--line); margin-top: 8px; display: grid; gap: 10px; }

/* Punkteskala 0–15: das zentrale Element */
.scale { display: grid; grid-template-columns: repeat(16, minmax(0, 1fr)); border: 1px solid var(--line); border-radius: var(--radius-s); overflow: hidden; position: relative; }
.scale button { height: 44px; border: 0; border-left: 1px solid var(--line); background: var(--paper); cursor: pointer; font-variant-numeric: tabular-nums; font-size: 15px; padding: 0; }
.scale button:first-child { border-left: 0; }
.scale button.sugg { background: #EEF0F3; }
.scale button.band-start { box-shadow: inset 0 -3px 0 var(--grey); }
.scale button.on { background: var(--red); color: #fff; font-weight: 700; }
.sugg-label { font-size: 13px; color: var(--ink-2); }

/* Seitenleiste */
.score { display: grid; grid-template-columns: repeat(3, 1fr); border-bottom: 1px solid var(--line); }
.score > div { padding: 14px 16px; border-left: 1px solid var(--line); }
.score > div:first-child { border-left: 0; }
.score span { display: block; font-size: 12px; color: var(--ink-2); }
.score b { font-size: 24px; font-variant-numeric: tabular-nums; font-weight: 650; }
.score .total b { color: var(--red); font-size: 30px; }
.score .total small { font-size: 12px; color: var(--grey); font-weight: 400; margin-left: 4px; }
.tabs { display: flex; border-bottom: 1px solid var(--line); position: sticky; top: 0; background: var(--paper); z-index: 2; }
.tabs button { flex: 1; min-height: var(--tap); border: 0; background: transparent; cursor: pointer; border-bottom: 3px solid transparent; color: var(--ink-2); }
.tabs button.on { border-bottom-color: var(--red); color: var(--ink); font-weight: 600; }
.tab { padding: 14px 16px 20px; }

.sb-area { margin-bottom: 22px; }
.sb-area h3 { display: flex; justify-content: space-between; margin-bottom: 8px; }
.sb-row { display: grid; grid-template-columns: minmax(0,1fr) 120px; border: 1px solid var(--line); border-top: 0; }
.sb-row:first-of-type { border-top: 1px solid var(--line); border-radius: var(--radius-s) var(--radius-s) 0 0; }
.sb-row:last-of-type { border-radius: 0 0 var(--radius-s) var(--radius-s); }
.sb-row.active { background: #FBF4F4; }
.sb-desc { padding: 6px 8px; display: grid; gap: 2px; }
.sb-desc label { display: flex; gap: 8px; align-items: flex-start; font-size: 13px; line-height: 1.35; cursor: pointer; padding: 3px 0; }
.sb-desc input { width: 18px; height: 18px; margin: 0; flex: none; accent-color: var(--red); }
.sb-pts { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; border-left: 1px solid var(--line); }
.sb-pts button { border: 0; border-left: 1px solid var(--line); background: transparent; cursor: pointer; font-variant-numeric: tabular-nums; min-height: 40px; }
.sb-pts button:first-child { border-left: 0; }
.sb-pts button.on { background: var(--red); color: #fff; font-weight: 700; }

.picker-search { position: sticky; top: 0; }
.bgroup { margin-top: 14px; }
.bgroup > h3 { font-size: 13px; color: var(--ink-2); margin-bottom: 6px; }
.bst { display: grid; grid-template-columns: auto 1fr; gap: 8px; padding: 7px 8px; border-radius: var(--radius-s); cursor: pointer; font-size: 14px; border: 1px solid transparent; text-align: left; background: none; width: 100%; }
.bst:hover { background: var(--surface); }
.bst.on { border-color: var(--line); background: #F7F8F9; }
.typ { font-size: 11px; font-weight: 700; width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; }
.typ.S { background: var(--ok-soft); color: var(--ok); }
.typ.W { background: var(--miss-soft); color: var(--miss); }
.typ.A { background: #E7EEF9; color: #234E8C; }
.chosen { display: grid; gap: 6px; }
.chosen .c { display: grid; grid-template-columns: auto 1fr auto; gap: 8px; align-items: start; font-size: 14px; padding: 6px 0; border-bottom: 1px solid var(--line); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { border: 1px solid var(--line); background: var(--paper); border-radius: 99px; padding: 4px 12px; font-size: 13px; cursor: pointer; min-height: 32px; }
.chip.on { background: var(--ink); color: #fff; border-color: var(--ink); }
.kg { width: 100%; border-collapse: collapse; }
.kg td { padding: 8px 0; border-bottom: 1px solid var(--line); }
.kg td:last-child { text-align: right; font-weight: 650; font-variant-numeric: tabular-nums; }
.warn { background: var(--part-soft); color: #6C4708; padding: 8px 10px; border-radius: var(--radius-s); font-size: 13px; }
.missing-list { font-size: 13px; color: var(--ink-2); margin: 6px 0 0; padding-left: 18px; }

.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--ink); color: #fff; padding: 10px 18px; border-radius: var(--radius-s); z-index: 50; font-size: 14px; }
@media (prefers-reduced-motion: no-preference) { .toast { transition: opacity .2s; } }
@media (max-width: 640px) {
  .topbar nav a { padding: 0 8px; }
  .topbar img { display: none; }
  .item-edit { grid-template-columns: 1fr; }
}