/* Kiebitz – Farben nach dem Gefieder des Kiebitz:
   weiße Brust, flaschengrüner Rücken, violetter Schimmer an der Schulter. */
:root {
  --belly: #F3F4EF;
  --ink: #1E2622;
  --plumage: #2E5E4E;
  --plumage-deep: #24342E;
  --sheen: #6B4E8A;
  --moss: #66736B;
  --stage: #39403C;
  --alert: #B5483A;
  --bar-text: #E6EBE7;

  --display: "Bahnschrift", "DIN Alternate", "DIN 2014", "Barlow Semi Condensed", "Roboto Condensed", "Arial Narrow", system-ui, sans-serif;
  --body: "Segoe UI", system-ui, -apple-system, "Roboto", "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; }

html, body { height: 100%; margin: 0; }

body {
  background: var(--belly);
  color: var(--ink);
  font: 16px/1.5 var(--body);
}

[hidden] { display: none !important; }

:focus-visible { outline: 2px solid var(--sheen); outline-offset: 3px; }

/* ------------------------------------------------------------ Start */

.start {
  min-height: 100%;
  padding: clamp(1.5rem, 5vw, 3.5rem) clamp(1.25rem, 9vw, 9rem);
  display: flex;
  flex-direction: column;
  gap: clamp(2.5rem, 8vh, 5.5rem);
}

.brand {
  display: flex;
  align-items: center;
  gap: .55rem;
  color: var(--plumage);
  font: 600 1.25rem/1 var(--display);
  letter-spacing: .01em;
}
.mark { width: 2rem; height: 2rem; }

.connect {
  max-width: 36rem;
  display: grid;
  gap: 1.6rem;
}

.connect h1 {
  margin: 0;
  font: 400 clamp(1.5rem, 3.2vw, 2.1rem)/1.15 var(--display);
  letter-spacing: -.005em;
}

.connect label {
  display: block;
  margin-bottom: .35rem;
  color: var(--moss);
  font-size: .95rem;
}

/* Die ID ist das, was man am Telefon durchgibt – deshalb so groß. */
.id-input {
  width: 100%;
  padding: .1em 0 .12em;
  border: 0;
  border-bottom: 3px solid var(--plumage);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  caret-color: var(--sheen);
  font: 400 clamp(2.6rem, 8vw, 4.6rem)/1.05 var(--display);
  font-variant-numeric: tabular-nums;
  letter-spacing: .05em;
}
.id-input::placeholder { color: #C9CEC6; }
.id-input:focus { outline: none; border-bottom-color: var(--sheen); }

.pw-row input, .field input {
  width: min(100%, 18rem);
  padding: .55rem .7rem;
  border: 1.5px solid #B9C1BA;
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  font: 1.1rem/1.3 var(--body);
  letter-spacing: .04em;
}
.pw-row input:focus, .field input:focus, .filter:focus {
  outline: none; border-color: var(--sheen); box-shadow: 0 0 0 3px rgba(107, 78, 138, .18);
}

.code-input {
  font-variant-numeric: tabular-nums;
  letter-spacing: .18em !important;
}

.primary {
  justify-self: start;
  padding: .7rem 1.6rem;
  border: 0;
  border-radius: 6px;
  background: var(--plumage);
  color: var(--belly);
  font: 600 1.05rem/1 var(--body);
  cursor: pointer;
}
.primary:hover { background: #264F42; }
.primary:disabled { background: #8FA39A; cursor: progress; }

.link {
  justify-self: start;
  padding: 0;
  border: 0;
  background: none;
  color: var(--plumage);
  font: inherit;
  font-size: .95rem;
  text-decoration: underline;
  text-decoration-color: rgba(46, 94, 78, .35);
  text-underline-offset: .2em;
  cursor: pointer;
}
.link:hover { text-decoration-color: currentColor; }

/* Angemeldetes Konto rechts in der Kopfzeile */
.account {
  margin-left: auto;
  display: flex;
  align-items: baseline;
  gap: .8rem;
  color: var(--moss);
  font: 400 .95rem/1.2 var(--body);
}
.account span { color: var(--ink); font-weight: 600; }

.status { min-height: 1.5em; margin: -.4rem 0 0; color: var(--moss); }
.status.error { color: var(--alert); }

/* ------------------------------------------------------ Übersicht */

.tree {
  max-width: 76rem;
  display: grid;
  gap: 1.1rem;
}

.tree-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem 2rem;
  flex-wrap: wrap;
}
.tree-head h1 {
  margin: 0;
  font: 400 clamp(1.5rem, 3.2vw, 2.1rem)/1.15 var(--display);
}

.filter {
  width: min(100%, 16rem);
  padding: .45rem .7rem;
  border: 1.5px solid #B9C1BA;
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  font: 1rem/1.3 var(--body);
}

.tree .status { margin: 0; }
.tree .status:empty { display: none; }

.groups { display: grid; gap: 1.4rem; }

.group summary {
  display: flex;
  align-items: baseline;
  gap: .8rem;
  padding: .2rem 0 .55rem;
  border-bottom: 1.5px solid #D6DBD3;
  cursor: pointer;
  list-style: none;
}
.group summary::-webkit-details-marker { display: none; }
.group summary::before {
  content: "";
  align-self: center;
  width: .45rem;
  height: .45rem;
  border-right: 2px solid var(--moss);
  border-bottom: 2px solid var(--moss);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform .12s ease-out;
}
.group:not([open]) summary::before { transform: rotate(-45deg); }

.group-name { font: 600 1.2rem/1.2 var(--display); color: var(--plumage-deep); }
.group.server .group-name { color: var(--sheen); }
.group-count { color: var(--moss); font-size: .88rem; font-variant-numeric: tabular-nums; }

.tiles {
  margin: .8rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(10.5rem, 1fr));
  gap: .6rem;
}

.tile {
  position: relative;
  width: 100%;
  display: grid;
  gap: .1rem;
  padding: .65rem .8rem .7rem 1.75rem;
  border: 1.5px solid #D6DBD3;
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  text-align: left;
  font: inherit;
  cursor: pointer;
}
.tile::before {
  content: "";
  position: absolute;
  left: .8rem;
  top: 1.08rem;
  width: .5rem;
  height: .5rem;
  border-radius: 50%;
  background: #B9C1BA;
}
.tile.online::before { background: #3C9A6E; box-shadow: 0 0 0 3px rgba(60, 154, 110, .18); }
.tile.online:hover { border-color: var(--plumage); background: #F7FAF7; }
.tile:disabled { cursor: default; background: transparent; }
.tile:disabled .tile-name { color: var(--moss); }
.tile.teacher { border-color: rgba(107, 78, 138, .45); }
.tile.teacher.online:hover { border-color: var(--sheen); }

.tile-name {
  font: 600 1.02rem/1.25 var(--display);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.tile-meta { color: var(--moss); font-size: .82rem; }
.tile.teacher .tile-meta { color: var(--sheen); }

.empty { margin: 0; color: var(--moss); }

.note {
  max-width: 34rem;
  margin: auto 0 0;
  color: var(--moss);
  font-size: .9rem;
}

/* ---------------------------------------------------------- Sitzung */

.session {
  height: 100%;
  display: flex;
  flex-direction: column;
  background: var(--stage);
}

.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .35rem .75rem;
  background: var(--plumage-deep);
  color: var(--bar-text);
  font-size: .9rem;
  flex-wrap: wrap;
}

.who { display: flex; align-items: baseline; gap: .9rem; min-width: 0; }
.who strong { font: 600 1.05rem/1.2 var(--display); white-space: nowrap; }
.route { color: #A9C7B8; white-space: nowrap; }
.stats { color: #8E9D95; font-variant-numeric: tabular-nums; white-space: nowrap; }

.tools { display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; }
.tools label { display: flex; align-items: center; gap: .4rem; color: #A9B6AE; }

.tools select, .tools button {
  height: 2rem;
  padding: 0 .65rem;
  border: 1px solid #4A5D55;
  border-radius: 5px;
  background: #2C3F38;
  color: var(--bar-text);
  font: inherit;
  cursor: pointer;
}
.tools button:hover, .tools select:hover { background: #355047; }
.tools .hangup { background: var(--alert); border-color: var(--alert); color: #fff; }
.tools .hangup:hover { background: #9E3D31; }

.menu { position: relative; }
.menu-list {
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  z-index: 5;
  min-width: 15rem;
  padding: .3rem;
  border-radius: 6px;
  background: #2C3F38;
  box-shadow: 0 8px 24px rgba(10, 20, 15, .35);
  display: grid;
}
.menu-list button { height: auto; padding: .5rem .7rem; border: 0; background: transparent; text-align: left; }

.stage {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  display: grid;
  place-items: center;
}
.stage.native { overflow: auto; place-items: start; }

#screen {
  display: block;
  background: #2F3532;
  cursor: default;
  image-rendering: auto;
}
#screen:focus { outline: none; }
#screen:focus-visible { outline: 2px solid var(--sheen); outline-offset: -2px; }

.overlay {
  position: absolute;
  inset: auto 1rem 1rem auto;
  margin: 0;
  padding: .5rem .8rem;
  border-radius: 6px;
  background: rgba(36, 52, 46, .92);
  color: var(--bar-text);
  font-size: .9rem;
}

/* Im Vollbild blendet sich die Leiste aus und erscheint oben am Rand. */
.session.fullscreen .bar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 10;
  transform: translateY(-100%);
  transition: transform .18s ease-out;
}
.session.fullscreen .bar.show { transform: none; }

@media (prefers-reduced-motion: reduce) {
  .session.fullscreen .bar, .group summary::before { transition: none; }
}

@media (max-width: 640px) {
  .connect { gap: 1.3rem; }
  .who { flex-wrap: wrap; }
  .tiles { grid-template-columns: repeat(auto-fill, minmax(9rem, 1fr)); }
  .filter { width: 100%; }
}