:root {
  --bg: #12241e;
  --bg-2: #1b332b;
  --card: #214037;
  --ink: #f3f1ea;
  --muted: #b7c4bc;
  --accent: #c8f27a;
  --ok: #c8f27a;
  --danger: #e36b5a;
  --warn: #e2b15a;
  --line: rgba(255, 255, 255, 0.08);
  --tabbar: #0e1c18;
  --tag-aktiv: #2b4a22;
  --tag-gesperrt: #5a2a24;
  --knob: #f3f1ea;
  --radius: 16px;
  color-scheme: dark;
  font-family: "Segoe UI", system-ui, sans-serif;
}

html[data-theme="light"] {
  --bg: #eef3ee;
  --bg-2: #e1ebe4;
  --card: #ffffff;
  --ink: #163028;
  --muted: #4f665c;
  --accent: #b6e05a;
  --ok: #2f7a32;
  --danger: #c94a3a;
  --warn: #c48a1c;
  --line: rgba(22, 48, 40, 0.12);
  --tabbar: #ffffff;
  --tag-aktiv: #d7ecd0;
  --tag-gesperrt: #f4d4ce;
  --knob: #163028;
  color-scheme: light;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--bg); color: var(--ink); }
body { padding: 0 env(safe-area-inset-right) 0 env(safe-area-inset-left); }
[hidden] { display: none !important; }

.screen { max-width: 42rem; margin: 0 auto; min-height: 100dvh; padding: 1.1rem 1rem 9rem; }
.brand {
  margin: 2.5rem 0 1.2rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.8rem;
}
.eyebrow { text-transform: uppercase; letter-spacing: 0.14em; font-size: 0.72rem; color: var(--accent); margin: 0 0 0.3rem; }
h1 { font-size: 1.7rem; margin: 0 0 0.35rem; font-weight: 650; }
h2 { font-size: 1rem; margin: 1.4rem 0 0.6rem; color: var(--muted); font-weight: 600; }
.lede, .hint { color: var(--muted); font-size: 0.95rem; }
.howto {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.45;
  padding-left: 1.2rem;
  margin: 0 0 1.1rem;
}
.howto code {
  font-size: 0.84rem;
  word-break: break-all;
}

.card, .topbar, .list li, .stats-grid article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.card { padding: 1rem; display: grid; gap: 0.75rem; }
label { display: grid; gap: 0.35rem; font-size: 0.88rem; color: var(--muted); }
input, select {
  width: 100%;
  border: 0;
  border-radius: 12px;
  padding: 0.85rem 0.8rem;
  font-size: 1.05rem;
  background: var(--bg-2);
  color: var(--ink);
}
.primary, .warn, .danger, .ghost {
  min-height: 48px;
  border: 0;
  border-radius: 999px;
  font-size: 1rem;
  font-weight: 650;
  padding: 0.7rem 1rem;
}
.primary { background: var(--accent); color: #163028; }
.warn { background: var(--warn); color: #2a1d04; }
.danger { background: var(--danger); color: white; }
.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn-row { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.btn-row button { flex: 1 1 8rem; }

.topbar { display: flex; justify-content: space-between; gap: 0.8rem; padding: 0.9rem; align-items: flex-start; }
.topbar-actions { display: flex; flex-wrap: wrap; gap: 0.4rem; justify-content: flex-end; }
.pill { font-size: 0.78rem; background: var(--bg-2); padding: 0.35rem 0.6rem; border-radius: 999px; }
.ble-status { color: var(--muted); font-size: 0.88rem; margin: 0.7rem 0 1rem; }
.ble-status.ok { color: var(--ok); }

.stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.65rem; }
.stats-grid article { padding: 0.9rem; }
.stats-grid .n { font-size: 1.6rem; font-weight: 700; margin: 0.15rem 0 0; }
.stats-grid .k { color: var(--muted); font-size: 0.8rem; }

.chart-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.9rem 0.85rem 0.7rem;
  margin-top: 0.75rem;
}
.chart-card h2 { margin: 0; }
.chart-sub { margin: 0.15rem 0 0; color: var(--muted); font-size: 0.75rem; }
.chart-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
  flex-wrap: wrap;
}
.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-items: center;
  color: var(--muted);
  font-size: 0.75rem;
  margin: 0.35rem 0 0.2rem;
}
.swatch {
  display: inline-block;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 3px;
  margin-right: 0.15rem;
  vertical-align: -0.08rem;
}
.swatch.granted { background: var(--ok); }
.swatch.denied { background: var(--danger); }
.swatch.innen { background: var(--accent); }
.swatch.aussen { background: #6ec4c0; }
html[data-theme="light"] .swatch.aussen { background: #2a8f8a; }
.range-toggle {
  display: flex;
  background: var(--bg-2);
  border-radius: 999px;
  padding: 0.12rem;
}
.range-toggle button {
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 650;
  min-height: 32px;
  padding: 0 0.7rem;
  border-radius: 999px;
}
.range-toggle button.active { background: var(--accent); color: #163028; }
.chart-box { width: 100%; min-height: 9rem; }
.chart-box svg { width: 100%; height: auto; display: block; }
.chart-box .hit { cursor: pointer; }
.heat-wrap { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.heat-wrap svg { width: 100%; height: auto; display: block; min-width: 18rem; }
.heat-scale {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.45rem;
  color: var(--muted);
  font-size: 0.72rem;
}
.heat-scale i {
  display: block;
  height: 8px;
  flex: 1;
  border-radius: 99px;
  background: linear-gradient(90deg, #ffeda0, #feb24c, #f03b20, #bd0026);
}
.chart-tip {
  position: fixed;
  z-index: 30;
  pointer-events: none;
  background: var(--ink);
  color: var(--bg);
  font-size: 0.78rem;
  padding: 0.35rem 0.5rem;
  border-radius: 8px;
  max-width: 16rem;
  box-shadow: 0 6px 18px rgba(0,0,0,0.25);
}

.bars { display: grid; gap: 0.45rem; }
.bar-row { display: grid; grid-template-columns: 4.6rem 1fr 2.2rem; gap: 0.45rem; align-items: center; font-size: 0.82rem; color: var(--muted); }
.bar { height: 10px; background: var(--bg-2); border-radius: 99px; overflow: hidden; }
.bar > i { display: block; height: 100%; background: var(--accent); }

.filters { display: grid; gap: 0.5rem; margin-bottom: 0.8rem; }
.list { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.5rem; }
.list li { padding: 0.85rem 0.95rem; }
.list .meta { color: var(--muted); font-size: 0.82rem; margin-top: 0.25rem; }
.tag { display: inline-block; font-size: 0.72rem; padding: 0.15rem 0.45rem; border-radius: 999px; background: var(--bg-2); }
.tag.gesperrt { background: var(--tag-gesperrt); }
.tag.aktiv { background: var(--tag-aktiv); }

.uid-row { display: flex; align-items: center; gap: 0.25rem; }
.uid-row input { text-align: center; font-family: ui-monospace, monospace; text-transform: uppercase; }
.uid-row span { color: var(--muted); }

.error { color: var(--danger); margin: 0; }
.ok { color: var(--ok); margin: 0; }

.theme-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 650;
  cursor: pointer;
  user-select: none;
  flex: none;
}
.theme-switch input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}
.switch-ui {
  width: 44px;
  height: 26px;
  border-radius: 999px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  position: relative;
  flex: none;
}
.switch-ui::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--knob);
  transition: transform 0.16s ease;
}
.theme-switch input:checked + .switch-ui {
  background: var(--accent);
  border-color: transparent;
}
.theme-switch input:checked + .switch-ui::after {
  transform: translateX(18px);
  background: #163028;
}
.theme-switch input:focus-visible + .switch-ui {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.tabbar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(0, 1fr));
  gap: 0.1rem;
  padding: 0.45rem 0.3rem calc(0.45rem + env(safe-area-inset-bottom));
  background: var(--tabbar);
  border-top: 1px solid var(--line);
}
.tabbar button {
  min-height: 48px;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-weight: 650;
  font-size: 0.72rem;
  border-radius: 12px;
  cursor: pointer;
}
.tabbar button.active { color: var(--accent); }

button { cursor: pointer; }
.primary, .warn, .danger, .ghost { transition: filter 0.12s ease, background 0.12s ease; }

@media (hover: hover) and (pointer: fine) {
  .tabbar button:hover { color: var(--ink); background: var(--bg-2); }
  .list li:hover { border-color: var(--accent); }
  .ghost:hover { background: var(--bg-2); }
  .primary:hover, .warn:hover, .danger:hover { filter: brightness(1.06); }
  .range-toggle button:hover { color: var(--ink); }
}

@media (min-width: 720px) {
  .filters {
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
  }
  .filters input { flex: 1 1 16rem; }
  .filters select { flex: 0 1 12rem; min-width: 10rem; }
  .filters button { flex: 0 0 auto; min-width: 6.5rem; }
  .stats-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 900px) {
  #login-screen.screen {
    max-width: none;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3.5rem 2rem;
  }
  #login-screen .brand {
    width: min(100%, 28rem);
    margin: 0 0 1.4rem;
  }
  #login-screen .brand h1 { font-size: 2.35rem; }
  #login-screen .lede,
  #login-screen .howto {
    width: min(100%, 28rem);
  }
  #login-screen #login-form {
    width: min(100%, 28rem);
    padding: 1.35rem;
  }

  .app-shell.screen {
    max-width: 88rem;
    display: grid;
    grid-template-columns: 13.25rem minmax(0, 1fr);
    grid-template-rows: auto 1fr;
    column-gap: 1.6rem;
    row-gap: 1rem;
    padding: 1.35rem 1.6rem 2rem;
    align-items: start;
  }
  .app-shell .topbar {
    grid-column: 1 / -1;
    align-items: center;
    padding: 1rem 1.1rem;
  }
  .app-shell .topbar h1 { font-size: 1.85rem; }
  .app-shell .tabbar {
    position: sticky;
    top: 1.15rem;
    left: auto;
    right: auto;
    bottom: auto;
    grid-column: 1;
    grid-row: 2;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    align-self: start;
    padding: 0.45rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--card);
  }
  .app-shell .tabbar button {
    min-height: 44px;
    font-size: 0.95rem;
    text-align: left;
    padding: 0.55rem 0.85rem;
  }
  .app-shell .tabbar button.active {
    color: #163028;
    background: var(--accent);
  }
  html[data-theme="light"] .app-shell .tabbar button.active {
    color: #163028;
  }
  .app-body {
    grid-column: 2;
    grid-row: 2;
    min-width: 0;
  }
  .app-shell .ble-status { margin-top: 0; }

  #tab-dashboard {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.85rem;
    align-items: start;
  }
  #tab-dashboard > .stats-grid,
  #tab-dashboard > .chart-tip,
  #tab-dashboard > .chart-card:nth-child(n + 4) {
    grid-column: 1 / -1;
  }
  #tab-dashboard > .chart-card { margin-top: 0; }
  .chart-box { min-height: 13rem; }

  #tab-system {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.85rem;
    align-items: start;
  }
  #tab-system > .stats-grid,
  #tab-system > .filters,
  #tab-system > .list {
    grid-column: 1 / -1;
  }
  #tab-system > .chart-card:nth-of-type(4) {
    grid-column: 1 / -1;
  }

  #new-form.card,
  #edit-form.card {
    grid-template-columns: 1fr 1fr;
    max-width: 44rem;
  }
  #new-form .hint,
  #new-form .uid-row,
  #new-form .ok,
  #new-form .error,
  #new-form .primary,
  #edit-form .hint,
  #edit-form .uid-row,
  #edit-form .btn-row,
  #edit-form .ok,
  #edit-form .error {
    grid-column: 1 / -1;
  }
  #tab-manage > .hint,
  #tab-manage > select {
    max-width: 44rem;
  }

  #member-list,
  #log-list {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1200px) {
  .app-shell.screen {
    max-width: 96rem;
    grid-template-columns: 14.5rem minmax(0, 1fr);
    padding: 1.6rem 2rem 2.2rem;
  }
  #tab-dashboard {
    grid-template-columns: 1fr 1fr;
  }
  #member-list {
    grid-template-columns: repeat(3, 1fr);
  }
  .stats-grid { gap: 0.8rem; }
  .stats-grid .n { font-size: 1.85rem; }
}