:root {
  color-scheme: light dark;
  --bg: #f5f7fa;
  --surface: #ffffff;
  --surface-2: #f0f2f7;
  --fg: #101828;
  --muted: #667085;
  --line: #e4e7ec;
  --accent: #2a6df4;
  --accent-soft: #e7efff;
  --free: #0f9d58;
  --free-bg: #e8f6ee;
  --busy: #b42318;
  --busy-bg: #fdf0ee;
  --warn: #b54708;
  --warn-bg: #fdf4e7;
  --shadow: 0 8px 28px rgba(16, 24, 40, .14);
  --tap: 44px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12151c;
    --surface: #1b1f28;
    --surface-2: #232834;
    --fg: #e9edf5;
    --muted: #98a2b3;
    --line: #2a2f3a;
    --accent: #6ea0ff;
    --accent-soft: #1d2942;
    --free: #4ade80;
    --free-bg: #16301f;
    --busy: #f97066;
    --busy-bg: #33201e;
    --warn: #fdb022;
    --warn-bg: #33270f;
    --shadow: 0 8px 28px rgba(0, 0, 0, .5);
  }
}

* { box-sizing: border-box; }

/* Muss nach vorne: eigene display-Regeln würden [hidden] sonst aushebeln. */
[hidden] { display: none !important; }

body {
  margin: 0;
  padding: 0 16px;
  /* viewport-fit=cover schiebt die Seite unter Notch und Dynamic Island.
     Im Querformat liegt der Rand sonst hinter der Kamera. */
  padding-left: max(16px, env(safe-area-inset-left));
  padding-right: max(16px, env(safe-area-inset-right));
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-text-size-adjust: 100%;
  overflow-wrap: anywhere;
}
body.no-scroll { overflow: hidden; }

h1 { font-size: 21px; margin: 0; letter-spacing: -.01em; }
h2 { font-size: 18px; margin: 0; }
.sub { color: var(--muted); font-size: 13px; margin: 2px 0 0; }
.muted { color: var(--muted); font-size: 13px; }
.tiny { font-size: 11.5px; }

/* ---------------- Startanzeige ---------------- */

#boot {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-block: 24px;
}
.boot-card { max-width: 340px; text-align: center; align-items: center; }
.boot-msg { margin: 0; color: var(--muted); font-size: 14px; }

/* ---------------- Anmeldung ---------------- */

#login {
  min-height: 100vh;
  min-height: 100dvh;   /* Rueckfall fuer iOS vor 15.4 */
  display: flex;
  align-items: center;
  justify-content: center;
  padding-block: 24px;
}

.card {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.card label { display: flex; flex-direction: column; gap: 5px; }

label span {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .03em;
  text-transform: uppercase;
  color: var(--muted);
}

input[type=text], input[type=password], input[type=date],
input[type=time], input[type=search] {
  font: inherit;
  font-size: 16px;               /* verhindert Zoom beim Tippen auf iOS */
  padding: 10px 12px;
  min-height: var(--tap);
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  color: var(--fg);
  min-width: 0;
  width: 100%;
}

input:focus-visible, button:focus-visible, select:focus-visible, summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.btn {
  font: inherit;
  font-weight: 600;
  padding: 11px 18px;
  min-height: var(--tap);
  border-radius: 10px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  white-space: nowrap;
}
.btn.ghost { background: var(--surface); color: var(--fg); border-color: var(--line); font-weight: 500; }
.btn.icon {
  padding: 11px 13px; line-height: 1;
  display: inline-flex; align-items: center; justify-content: center;
}
.btn:disabled { opacity: .55; cursor: default; }

.linkbtn {
  font: inherit; font-size: 14px; background: none; border: none;
  color: var(--muted); cursor: pointer; text-decoration: underline; padding: 8px 4px;
}
.linkbtn.tiny { font-size: 12.5px; padding: 2px 4px; }

.err {
  margin: 0; font-size: 14px; color: var(--busy);
  background: var(--busy-bg); border: 1px solid var(--busy);
  border-radius: 8px; padding: 9px 12px;
}

.fineprint { margin: 0; font-size: 12px; line-height: 1.5; color: var(--muted); }

/* ---------------- App-Rahmen ---------------- */

#app {
  max-width: 1040px;
  margin: 0 auto;
  padding-block: 14px;
  padding-bottom: calc(40px + env(safe-area-inset-bottom));
}

header { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
header > div { flex: 1; min-width: 0; }


/* ---------------- Gezeichnete Zeichen ---------------- */

/*
 * Ein einziges Icon-Set: 16er-Raster, gleiche Strichstärke, erbt die Farbe
 * vom Umfeld. Bewusst keine Emoji – die bringen eigene Farben und eine
 * eigene Bildsprache mit, die zu nichts hier passt.
 */
.ic {
  width: 14px;
  height: 14px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.ic-btn { width: 17px; height: 17px; }
.ic-chev {
  width: 13px; height: 13px; color: var(--muted);
  transition: transform .15s ease;
}
@media (prefers-reduced-motion: reduce) { .ic-chev { transition: none; } }

/* ---------------- Steuerung ---------------- */

/*
 * Drei Entscheidungen von oben nach unten: welcher Tag, welche Lektionen,
 * alles Weitere. Haarlinien trennen sie, damit man am Handy sofort sieht,
 * wo die eine aufhört und die nächste anfängt.
 */
.controls {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 4px 14px;
  display: flex;
  flex-direction: column;
}

.group { padding-block: 12px; min-width: 0; }
.group + .group { border-top: 1px solid var(--line); }

.group-head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 10px; margin-bottom: 8px;
}

.lbl { font-size: 12px; color: var(--muted); }
.hint { opacity: .72; }

/* Tag */

.group-day { display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap; }
.field { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.field-date { flex: 1 1 160px; }
.group-day .btn { flex: 0 0 auto; }

/*
 * Datums- und Zeitfelder bleiben bewusst in ihrer nativen Darstellung.
 * `appearance: none` hat auf iOS den Wert verrutschen lassen und teils ganz
 * verschluckt – und gegen den Überlauf half ohnehin etwas anderes:
 * `min-width: 0` auf .field, damit das Feld unter seine Eigenbreite schrumpfen
 * darf. Ohne das sprengt iOS den Kasten.
 */
input[type=date], input[type=time] {
  max-width: 100%;
  text-align: left;
}

/* Lektionen */

.group-slots { display: flex; flex-direction: column; }

/* Die Wischzeile bekommt rechts eine weiche Kante, damit man merkt,
   dass da noch mehr kommt. Am grossen Bildschirm umbricht sie stattdessen. */
.chiprow { position: relative; min-width: 0; }
.chiprow::after {
  content: '';
  position: absolute; inset-block: 0; right: -1px; width: 28px;
  background: linear-gradient(to right, transparent, var(--surface) 80%);
  pointer-events: none;
}

.chips { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }

.scrollchips {
  flex-wrap: nowrap;
  overflow-x: auto;
  padding-bottom: 6px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.scrollchips::-webkit-scrollbar { display: none; }
.scrollchips > * { flex: 0 0 auto; }

.chip {
  font: inherit; font-size: 13px; padding: 7px 12px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--surface); color: var(--fg);
  cursor: pointer; min-height: 38px; display: inline-flex; align-items: center; gap: 6px;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.is-active { background: var(--accent); border-color: var(--accent); color: #fff; }
.chip.is-active:hover { color: #fff; }

.slotchip strong { font-weight: 700; }
.slotchip .chiptime { font-size: 11.5px; opacity: .78; font-variant-numeric: tabular-nums; }

.chip-all { font-style: italic; }
.chip-all:not(.is-active) { color: var(--muted); }

.slot-note { margin: 8px 0 0; font-size: 12.5px; color: var(--muted); }

/* Aufklappbarer Rest */

.more > summary {
  cursor: pointer; list-style: none; font-size: 14px; font-weight: 600;
  display: flex; align-items: center; gap: 9px; min-height: 30px;
}
.more > summary::-webkit-details-marker { display: none; }
.more[open] > summary .ic-chev { transform: rotate(90deg); }
.more-mark {
  font-size: 12px; font-weight: 400; color: var(--muted);
  margin-left: auto; text-align: right; min-width: 0;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.more[open] .more-mark { display: none; }

.more-body { display: flex; flex-direction: column; gap: 16px; padding-top: 14px; }
.subgroup { display: flex; flex-direction: column; gap: 7px; min-width: 0; }

.timerow { display: flex; gap: 10px; }
.timerow .field { flex: 1 1 0; max-width: 190px; }

.opts { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.opts input[type=search] { flex: 1 1 200px; }

select {
  font: inherit; font-size: 15px; padding: 9px 30px 9px 11px; min-height: var(--tap);
  border: 1px solid var(--line); border-radius: 10px;
  background: var(--surface); color: var(--fg); cursor: pointer;
  flex: 1 1 190px; min-width: 0;
}
.check {
  display: flex; flex-direction: row; align-items: center; gap: 8px;
  font-size: 14px; color: var(--muted); cursor: pointer; min-height: 38px;
  flex: 0 0 auto;
}
.check input { width: 20px; height: 20px; accent-color: var(--accent); }
.check span { text-transform: none; letter-spacing: 0; font-weight: 400; }
/* ---------------- Reiter und Inhalt ---------------- */

.tabs { display: flex; gap: 4px; margin: 16px 0 0; }
.tab {
  font: inherit; font-size: 14px; font-weight: 600; padding: 10px 16px; min-height: 42px;
  border: 1px solid transparent; border-radius: 10px 10px 0 0;
  background: none; color: var(--muted); cursor: pointer;
}
.tab.is-active {
  color: var(--fg); background: var(--surface);
  border-color: var(--line); border-bottom-color: var(--surface);
}

main {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 0 14px 14px 14px;
  padding: 14px;
  min-height: 220px;
}

.status { font-size: 14px; color: var(--muted); margin: 0 0 12px; }
.status strong { color: var(--fg); font-size: 16px; }

.note {
  font-size: 13px; padding: 10px 12px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--bg); margin: 0 0 12px;
}
.note.is-err { border-color: var(--busy); background: var(--busy-bg); color: var(--busy); }
.detailpre { font-size: 11px; white-space: pre-wrap; overflow: auto; max-height: 200px; }

/* ---------------- Raumkarten ---------------- */

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(168px, 1fr)); gap: 10px; }

.room-card {
  font: inherit; text-align: left; cursor: pointer;
  border: 1px solid var(--line); border-radius: 12px; padding: 11px;
  background: var(--surface); color: var(--fg);
  display: flex; flex-direction: column; gap: 2px;
}
.room-card:hover { border-color: var(--accent); }
.room-card.is-free { border-color: var(--free); background: var(--free-bg); }

.card-top { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.room-card .name { font-weight: 700; font-size: 16px; }
.room-card .desc { font-size: 12.5px; color: var(--muted); }
.room-card .meta { font-size: 13px; margin-top: 6px; font-weight: 600; color: var(--free); }
.room-card.is-busy .meta { color: var(--busy); font-weight: 500; }

/* Gemeldete Zustände überschreiben die Optik */
.room-card.r-zu { border-color: var(--warn); background: var(--warn-bg); }
.room-card.r-besetzt, .room-card.r-drin { border-color: var(--busy); background: var(--busy-bg); }
.room-card.r-zu .meta, .room-card.r-besetzt .meta, .room-card.r-drin .meta { color: var(--muted); }

.badge {
  font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 999px;
  border: 1px solid currentColor; white-space: nowrap;
  display: inline-flex; align-items: center; gap: 4px;
}
.badge .ic { width: 11px; height: 11px; stroke-width: 2; }
.badge.b-zu { color: var(--warn); }
.badge.b-besetzt, .badge.b-drin { color: var(--busy); }
.badge.b-frei { color: var(--free); }

.chance { font-size: 11.5px; margin-top: 5px; color: var(--muted); }
.chance.t-good { color: var(--free); }
.chance.t-bad { color: var(--busy); }

.empty { text-align: center; color: var(--muted); padding: 40px 8px; }

details.taken { margin-top: 20px; }
details.taken > summary { cursor: pointer; font-size: 14px; color: var(--muted); margin-bottom: 12px; min-height: 38px; padding: 8px 0; }

/* ---------------- Tagesraster ---------------- */

.scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 0 -14px; padding: 0 14px; }
table.raster { border-collapse: separate; border-spacing: 0; width: 100%; font-size: 12.5px; }
table.raster th, table.raster td {
  border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
  padding: 6px 8px; text-align: center; white-space: nowrap;
}
table.raster tr:first-child th { border-top: 1px solid var(--line); position: sticky; top: 0; z-index: 2; background: var(--surface); }
table.raster th.room {
  text-align: left; position: sticky; left: 0; z-index: 3;
  background: var(--surface); border-left: 1px solid var(--line); cursor: pointer;
  max-width: 96px; overflow: hidden; text-overflow: ellipsis;
}
table.raster td.is-f { background: var(--free-bg); color: var(--free); font-weight: 600; }
table.raster td.is-b { background: var(--busy-bg); color: var(--busy); }
table.raster td.r-zu { background: var(--warn-bg); color: var(--warn); font-weight: 700; }
table.raster td.r-besetzt, table.raster td.r-drin { background: var(--busy-bg); color: var(--busy); font-weight: 700; }
table.raster .is-sel { box-shadow: inset 0 0 0 2px var(--accent); }
table.raster td .ic { width: 13px; height: 13px; vertical-align: -2px; }

footer {
  font-size: 12px; color: var(--muted); text-align: center;
  margin-top: 18px; padding-bottom: 8px;
}

/* ---------------- Aktionsblatt ---------------- */

.sheet-backdrop {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(16, 24, 40, .45);
  display: flex; align-items: flex-end; justify-content: center;
}

.sheet-card {
  width: 100%; max-width: 480px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px 18px 0 0;
  box-shadow: var(--shadow);
  padding: 8px 16px calc(20px + env(safe-area-inset-bottom));
  max-height: 88vh;
  max-height: 88dvh;    /* Rueckfall fuer iOS vor 15.4 */
  overflow-y: auto;
  animation: sheet-in .18s ease-out;
}
@keyframes sheet-in { from { transform: translateY(18px); opacity: .6; } }
@media (prefers-reduced-motion: reduce) { .sheet-card { animation: none; } }

.sheet-grab {
  width: 38px; height: 4px; border-radius: 99px; background: var(--line);
  margin: 4px auto 10px;
}
.sheet-head { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 12px; }
.sheet-head > div { flex: 1; min-width: 0; }

.sheet-isy {
  margin: 0 0 14px; font-size: 13.5px; padding: 9px 11px;
  background: var(--surface-2); border-radius: 10px;
}
.sheet-isy .ok { color: var(--free); font-weight: 700; }
.sheet-isy .no { color: var(--busy); font-weight: 700; }

.seg { display: flex; gap: 6px; margin: 5px 0 14px; }
.segbtn {
  font: inherit; font-size: 13px; flex: 1 1 0; min-height: 40px; padding: 8px 10px;
  border: 1px solid var(--line); border-radius: 10px;
  background: var(--surface); color: var(--fg); cursor: pointer;
}
.segbtn.is-active { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); font-weight: 600; }

.acts { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.actbtn {
  font: inherit; text-align: left; cursor: pointer;
  display: flex; flex-direction: column; gap: 2px;
  padding: 11px 12px; min-height: 60px;
  border: 1px solid var(--line); border-radius: 12px;
  background: var(--surface); color: var(--fg);
}
.actbtn-head { display: flex; align-items: center; gap: 7px; }
.actbtn strong { font-size: 14px; }
.actbtn small { font-size: 11px; color: var(--muted); line-height: 1.35; }
.actbtn:hover { border-color: currentColor; }
.actbtn.a-frei { color: var(--free); }
.actbtn.a-drin, .actbtn.a-besetzt { color: var(--busy); }
.actbtn.a-zu { color: var(--warn); }
.actbtn strong { color: inherit; }
.actbtn:disabled { opacity: .5; }

.undo { display: block; margin: 10px auto 0; }

.sheet-h { margin: 18px 0 6px; font-weight: 600; }

.replist { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 5px; }
.replist li {
  display: flex; justify-content: space-between; gap: 10px; align-items: baseline;
  font-size: 13px; padding: 7px 10px; border-radius: 8px; background: var(--surface-2);
}
.replist li small { color: var(--muted); font-size: 11.5px; white-space: nowrap; }
.repwhat { display: inline-flex; align-items: center; gap: 6px; }
.replist li.r-zu { color: var(--warn); }
.replist li.r-besetzt, .replist li.r-drin { color: var(--busy); }
.replist li.r-frei { color: var(--free); }

.bars { display: flex; flex-direction: column; gap: 7px; margin-bottom: 8px; }
.barrow { display: flex; align-items: center; gap: 9px; font-size: 12.5px; }
.barlbl { flex: 0 0 96px; color: var(--muted); }
.bartrack { flex: 1 1 auto; height: 9px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }
.barfill { display: block; height: 100%; border-radius: 99px; background: var(--muted); }
.barfill.t-good { background: var(--free); }
.barfill.t-bad { background: var(--busy); }
.barfill.t-warn { background: var(--warn); }
.barval { flex: 0 0 46px; text-align: right; font-variant-numeric: tabular-nums; font-weight: 600; }

/* Wie belastbar die Zahlen sind – bei wenigen Meldungen deutlich sichtbar. */
.trust { margin: 10px 0 4px; font-size: 12.5px; }
.trust.t-gering { color: var(--warn); font-weight: 600; }
.trust.t-mittel { color: var(--fg); }
.trust.t-hoch { color: var(--muted); }

/* ---------------- Ladeanzeige ---------------- */

.spinner {
  display: inline-block; width: 13px; height: 13px; margin-right: 7px;
  border: 2px solid var(--line); border-top-color: var(--accent);
  border-radius: 50%; animation: spin .7s linear infinite; vertical-align: -2px;
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation: none; } }

/* ---------------- Handy ---------------- */

/*
 * Am grossen Bildschirm ist genug Platz: die Lektionen umbrechen, statt zu
 * wischen, und die weiche Kante rechts hat nichts mehr zu verbergen.
 */
@media (min-width: 721px) {
  .scrollchips { flex-wrap: wrap; overflow-x: visible; padding-bottom: 0; }
  .chiprow::after { display: none; }
}

/* ---------------- Handy ---------------- */

@media (max-width: 720px) {
  body {
    padding: 0 12px;
    padding-left: max(12px, env(safe-area-inset-left));
    padding-right: max(12px, env(safe-area-inset-right));
  }
  #app { padding-block: 10px; }
  h1 { font-size: 19px; }

  .controls { padding: 2px 12px; border-radius: 12px; }
  .group { padding-block: 11px; }

  /* Datum, Jetzt und Neu laden bleiben zusammen in einer Zeile. */
  .group-day { gap: 8px; flex-wrap: nowrap; }
  .field-date { flex: 1 1 auto; }
  .group-day .btn { padding-inline: 14px; }

  .tabs { margin-top: 14px; }
  .tab { flex: 1 1 0; text-align: center; padding: 10px 8px; }

  main { padding: 12px; border-radius: 12px; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(146px, 1fr)); gap: 8px; }
  .room-card { padding: 10px; }
  .room-card .name { font-size: 15.5px; }

  .timerow .field { max-width: none; }
  .opts input[type=search] { flex: 1 1 100%; }
  select { flex: 1 1 100%; }

  .scroll { margin: 0 -12px; padding: 0 12px; }
  table.raster { font-size: 11.5px; }
  table.raster th, table.raster td { padding: 5px 6px; }
  table.raster th.room { max-width: 70px; }
}

/* Sehr schmale Geräte: zwei Karten nebeneinander bleiben lesbar, die
   Melde-Knöpfe brauchen dagegen die volle Breite. */
@media (max-width: 400px) {
  .grid { grid-template-columns: 1fr 1fr; }
  .acts { grid-template-columns: 1fr; }
  .actbtn { min-height: 0; padding: 9px 12px; }
  .group-day .btn { padding-inline: 12px; }
}

/* Auf grossen Bildschirmen das Aktionsblatt als Dialog mittig zeigen. */
@media (min-width: 620px) {
  .sheet-backdrop { align-items: center; }
  .sheet-card { border-radius: 16px; padding-bottom: 20px; }
  .sheet-grab { display: none; }
}