:root {
  --bg: #f4f6f3;
  --card: #ffffff;
  --ink: #1b221d;
  --muted: #66716a;
  --line: #dfe5df;
  --accent: #2f7d4f;
  --accent-ink: #ffffff;
  --accent-soft: #e3f1e8;
  --free: #dff0e4;
  --free-stroke: #6fae84;
  --booked: #f6dcd6;
  --booked-stroke: #c9705d;
  --mine: #dbe7fb;
  --mine-stroke: #4a7bd0;
  --locked: #eceeec;
  --locked-line: #d3d8d4;
  --struct: #f3f5f2;
  --struct-stroke: #d6ddd7;
  --stairs: #e4e9e4;
  --danger: #b4432f;
  --warn-bg: #fff4dc;
  --warn-line: #e6c06a;
  --shadow: 0 1px 2px rgba(20, 30, 20, .06), 0 4px 16px rgba(20, 30, 20, .05);
  --radius: 14px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121513;
    --card: #1b1f1c;
    --ink: #e8ece9;
    --muted: #96a19a;
    --line: #2c332e;
    --accent: #4fae76;
    --accent-ink: #0d1a12;
    --accent-soft: #1f3327;
    --free: #1d3325;
    --free-stroke: #4f9a69;
    --booked: #3d2420;
    --booked-stroke: #c8735f;
    --mine: #1e2a40;
    --mine-stroke: #6f9be6;
    --locked: #222724;
    --locked-line: #2f3631;
    --struct: #191d1a;
    --struct-stroke: #2c332e;
    --stairs: #242a26;
    --danger: #e0715b;
    --warn-bg: #33291a;
    --warn-line: #8a6a2a;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink); }
body { font: 15px/1.45 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif; -webkit-font-smoothing: antialiased; }
button, input, select { font: inherit; color: inherit; }
h1, h2, h3 { margin: 0 0 .5rem; letter-spacing: -.01em; }
h2 { font-size: 1.1rem; }
h3 { font-size: 1rem; }
.muted { color: var(--muted); font-weight: 400; }
.small { font-size: .85rem; }
.splash { display: grid; place-items: center; min-height: 100vh; color: var(--muted); }

/* Layout */
.app { min-height: 100vh; }
.top {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  padding: 10px max(16px, env(safe-area-inset-left));
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(1.4) blur(14px); -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; margin-right: auto; }
.brand b { display: block; font-size: 1rem; }
.brand small { display: block; color: var(--muted); font-size: .75rem; line-height: 1.1; }
.brand-mark { display: inline-grid; place-items: center; width: 56px; height: 56px; border-radius: 14px; background: var(--accent); color: var(--accent-ink); font-weight: 800; letter-spacing: .04em; }
.brand-mark.sm { width: 36px; height: 36px; border-radius: 10px; font-size: .75rem; }
.user { display: flex; gap: 4px; }
main { max-width: 1320px; margin: 0 auto; padding: 16px; }
.view { display: flex; flex-direction: column; gap: 14px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
.toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; justify-content: space-between; }

/* Buttons */
.btn { border: 1px solid var(--line); background: var(--card); padding: 8px 14px; border-radius: 10px; cursor: pointer; font-weight: 500; }
.btn:hover:not(:disabled) { border-color: var(--muted); }
.btn:disabled { opacity: .45; cursor: default; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn.danger-ghost { color: var(--danger); }
.btn.ghost { background: transparent; border-color: transparent; }
.btn.ghost:hover { background: var(--card); }
.btn.sm { padding: 5px 10px; font-size: .85rem; }
.icon-btn { border: 1px solid var(--line); background: var(--card); width: 36px; height: 36px; border-radius: 10px; cursor: pointer; font-size: 1.1rem; line-height: 1; flex: none; }
.icon-btn:hover { border-color: var(--muted); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Segment-Schalter */
.seg { display: inline-flex; background: color-mix(in srgb, var(--ink) 7%, transparent); padding: 3px; border-radius: 11px; gap: 2px; max-width: 100%; overflow-x: auto; }
.seg button { border: 0; background: transparent; padding: 6px 14px; border-radius: 8px; cursor: pointer; white-space: nowrap; font-weight: 500; color: var(--muted); }
.seg button.on { background: var(--card); color: var(--ink); box-shadow: 0 1px 3px rgba(0,0,0,.12); }
.seg-sm button { padding: 4px 10px; font-size: .88rem; }

/* Datum */
.date-nav { display: flex; align-items: center; gap: 6px; }
.date-pill { position: relative; display: inline-flex; align-items: center; height: 36px; padding: 0 14px; border-radius: 10px; background: var(--card); border: 1px solid var(--line); font-weight: 600; cursor: pointer; white-space: nowrap; }
.date-pill input { position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; }
.date-pill.static { cursor: default; }

/* Stunden-Leiste */
.periods-bar { display: grid; grid-template-columns: repeat(auto-fit, minmax(64px, 1fr)); gap: 6px; }
.pbtn { position: relative; border: 1px solid var(--line); background: var(--card); border-radius: 10px; padding: 6px 4px; cursor: pointer; display: flex; flex-direction: column; align-items: center; }
.pbtn b { font-size: 1rem; }
.pbtn small { color: var(--muted); font-size: .72rem; }
.pbtn.on { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.pbtn.on small { color: inherit; opacity: .85; }
.pbtn .dot { position: absolute; top: 3px; right: 5px; font-style: normal; font-size: .65rem; color: var(--booked-stroke); font-weight: 700; }
.pbtn.on .dot { color: var(--accent-ink); }

/* Grundriss */
.plan-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 8px; margin-bottom: 8px; }
.plan-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.plan { display: block; width: 100%; min-width: 720px; height: auto; user-select: none; touch-action: pan-x pan-y; }
.plan.editing { touch-action: none; }
.room rect { stroke-width: 2; transition: fill .15s; }
.room.clickable { cursor: pointer; }
.room.clickable:hover rect { filter: brightness(.96); }
.room .t-num { text-anchor: middle; font-weight: 700; fill: var(--ink); pointer-events: none; }
.room .t-sub { text-anchor: middle; fill: var(--muted); pointer-events: none; }
.room .t-struct { text-anchor: middle; fill: var(--muted); opacity: .7; pointer-events: none; font-weight: 500; }
.st-free rect, .sw.st-free { fill: var(--free); stroke: var(--free-stroke); background: var(--free); border-color: var(--free-stroke); }
.st-booked rect, .sw.st-booked { fill: var(--booked); stroke: var(--booked-stroke); background: var(--booked); border-color: var(--booked-stroke); }
.st-mine rect, .sw.st-mine { fill: var(--mine); stroke: var(--mine-stroke); background: var(--mine); border-color: var(--mine-stroke); }
.st-locked rect { stroke: var(--locked-line); }
.sw.st-locked { background: repeating-linear-gradient(45deg, var(--locked) 0 4px, var(--locked-line) 4px 5px); border-color: var(--locked-line); }
.st-booked .t-sub, .st-mine .t-sub { fill: var(--ink); font-weight: 600; }
.st-struct rect { fill: var(--struct); stroke: var(--struct-stroke); }
.p-stairs-bg { fill: var(--stairs); }
.p-stairs-line { stroke: var(--struct-stroke); stroke-width: 2; }
.p-hatch-bg { fill: var(--locked); }
.p-hatch-line { stroke: var(--locked-line); stroke-width: 3; }
.room.sel rect:first-child { stroke: var(--accent); stroke-width: 4; }
.editing .room { cursor: move; }
.handle { fill: var(--accent); stroke: var(--card); stroke-width: 2; cursor: nwse-resize; }
.legend { display: flex; flex-wrap: wrap; gap: 12px; font-size: .82rem; color: var(--muted); }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.sw { display: inline-block; width: 14px; height: 14px; border-radius: 4px; border: 1.5px solid; }

/* Freie Räume */
.chips { display: flex; flex-direction: column; gap: 10px; }
.chip-group { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.chip-floor { font-size: .78rem; color: var(--muted); width: 112px; flex: none; }
.chip { border: 1px solid var(--free-stroke); background: var(--free); border-radius: 999px; padding: 4px 12px; cursor: pointer; font-weight: 600; display: inline-flex; gap: 6px; align-items: baseline; }
.chip small { font-weight: 400; color: var(--muted); font-size: .75rem; }

/* Woche */
.week-scroll { overflow-x: auto; margin-top: 10px; }
.week { width: 100%; border-collapse: separate; border-spacing: 4px; min-width: 560px; }
.week th { font-size: .82rem; font-weight: 600; color: var(--muted); padding: 4px; }
.week th.today { color: var(--accent); }
.week tbody th { text-align: left; width: 56px; }
.week tbody th b { display: block; color: var(--ink); }
.week tbody th small { font-weight: 400; }
.week td { padding: 0; }
.cell { width: 100%; min-height: 50px; border-radius: 9px; border: 1px solid var(--line); cursor: pointer; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; padding: 6px 8px; text-align: left; background: transparent; }
.cell b { font-size: .88rem; line-height: 1.15; }
.cell small { color: var(--muted); font-size: .75rem; }
.cell.free { align-items: center; color: var(--muted); border-style: dashed; }
.cell.free:hover:not(:disabled) { background: var(--free); border-color: var(--free-stroke); border-style: solid; color: var(--ink); }
.cell.free:disabled { opacity: .35; cursor: default; }
.cell.booked { background: var(--booked); border-color: var(--booked-stroke); }
.cell.mine { background: var(--mine); border-color: var(--mine-stroke); }
.select { padding: 8px 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--card); max-width: 100%; min-width: 0; flex: 1 1 260px; }

/* Meine */
.mine-day { margin-top: 14px; }
.mine-date { font-weight: 700; font-size: .9rem; margin-bottom: 6px; }
.mine-row { width: 100%; display: flex; gap: 12px; align-items: center; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: transparent; cursor: pointer; margin-bottom: 6px; text-align: left; }
.mine-row:hover { border-color: var(--mine-stroke); background: var(--mine); }
.mine-p { font-weight: 700; width: 44px; flex: none; display: flex; flex-direction: column; }
.mine-p small { font-weight: 400; color: var(--muted); font-size: .72rem; }
.mine-room { flex: 1; min-width: 0; }
.mine-cls { color: var(--muted); }
.tag { display: inline-block; font-size: .7rem; padding: 1px 7px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); margin-left: 6px; font-weight: 600; }

/* Modal & Formulare */
.backdrop { position: fixed; inset: 0; background: rgba(10, 16, 12, .45); display: grid; place-items: center; padding: 16px; z-index: 50; }
.modal { background: var(--card); border-radius: 18px; width: 100%; max-width: 520px; max-height: calc(100vh - 32px); overflow: auto; padding: 18px 20px 20px; box-shadow: 0 20px 60px rgba(0,0,0,.25); }
.modal.wide { max-width: 820px; }
.modal-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.modal-head h2 { margin: 0; }
.form { display: flex; flex-direction: column; gap: 12px; }
.form.narrow { max-width: 460px; }
label { display: flex; flex-direction: column; gap: 4px; font-size: .85rem; color: var(--muted); font-weight: 500; }
label > input:not([type=checkbox]), label > select { width: 100%; }
.date-pill { flex-direction: row; color: var(--ink); font-size: .95rem; }
label.check { flex-direction: row; align-items: center; gap: 8px; color: var(--ink); font-size: .95rem; }
.lbl { font-size: .85rem; color: var(--muted); font-weight: 500; margin-bottom: 6px; }
input, select { padding: 9px 11px; border-radius: 9px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); min-width: 0; }
input:focus, select:focus { border-color: var(--accent); outline: none; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.grid4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.row-end { display: flex; justify-content: flex-end; gap: 8px; flex-wrap: wrap; margin-top: 4px; }
.mt8 { margin-top: 8px; }
.err { color: var(--danger); font-size: .9rem; }
.warn { background: var(--warn-bg); border: 1px solid var(--warn-line); border-radius: 10px; padding: 10px 12px; font-size: .88rem; }
.warn ul { margin: 6px 0 8px; padding-left: 18px; }
.room-head { display: flex; flex-direction: column; gap: 2px; }
.period-picks { display: grid; grid-template-columns: repeat(auto-fill, minmax(54px, 1fr)); gap: 6px; }
.pp { border: 1px solid var(--line); border-radius: 9px; background: transparent; padding: 6px 2px; cursor: pointer; display: flex; flex-direction: column; align-items: center; }
.pp small { font-size: .7rem; color: var(--muted); }
.pp.on { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.pp.on small { color: inherit; }
.pp.taken { background: var(--booked); border-color: var(--booked-stroke); cursor: not-allowed; opacity: .75; }
.dl { display: grid; grid-template-columns: max-content 1fr; gap: 6px 14px; margin: 0; }
.dl dt { color: var(--muted); }
.dl dd { margin: 0; font-weight: 500; }

/* Login */
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login { width: 100%; max-width: 360px; display: flex; flex-direction: column; gap: 12px; padding: 28px; }
.login h1 { margin: 6px 0 0; font-size: 1.6rem; }
.login p { margin: 0 0 6px; }

/* Verwaltung */
.editor-grid { display: grid; grid-template-columns: minmax(0, 1fr) 330px; gap: 14px; align-items: start; }
.add-user { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.add-user input { flex: 1 1 140px; }
.info-box { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; background: var(--accent-soft); border-radius: 10px; padding: 10px 12px; margin-bottom: 12px; }
.info-box code { font-size: 1.05rem; font-weight: 700; padding: 2px 8px; background: var(--card); border-radius: 6px; user-select: all; }
.info-box .icon-btn { margin-left: auto; width: 28px; height: 28px; font-size: .9rem; }
.table-scroll { overflow-x: auto; }
.tbl { width: 100%; border-collapse: collapse; font-size: .9rem; }
.tbl th { text-align: left; color: var(--muted); font-weight: 500; font-size: .8rem; padding: 6px 8px; border-bottom: 1px solid var(--line); }
.tbl td { padding: 8px; border-bottom: 1px solid var(--line); }
.tbl select { padding: 4px 8px; }
.tbl tr.inactive td { opacity: .5; }
.tbl .actions { display: flex; gap: 6px; justify-content: flex-end; }
.period-row { display: flex; align-items: center; gap: 8px; }
.period-row b { width: 24px; }

/* Toast */
.toast { position: fixed; left: 50%; bottom: max(20px, env(safe-area-inset-bottom)); transform: translateX(-50%); background: var(--ink); color: var(--bg); padding: 10px 18px; border-radius: 12px; z-index: 80; box-shadow: 0 8px 30px rgba(0,0,0,.25); font-weight: 500; max-width: calc(100vw - 32px); }
.toast.bad { background: var(--danger); color: #fff; }

@media (max-width: 900px) {
  .editor-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  main { padding: 12px; }
  .top { gap: 8px; }
  .top .seg { order: 3; width: 100%; }
  .top .seg button { flex: 1; }
  .toolbar > .seg { width: 100%; }
  .toolbar > .seg button { flex: 1; }
  .chip-floor { width: 100%; }
  .periods-bar { grid-template-columns: repeat(auto-fit, minmax(38px, 1fr)); gap: 4px; }
  .pbtn small { display: none; }
  .pbtn { padding: 8px 2px; }
  .date-nav { flex: 1; }
  .date-pill { flex: 1; justify-content: center; }
  .plan { min-width: 860px; }
  .grid4 { grid-template-columns: repeat(2, 1fr); }
  .card { padding: 12px; }
}