:root {
  color-scheme: light;
  --ink: #17201b;
  --muted: #66736c;
  --paper: #f7f3ea;
  --panel: #fffdf8;
  --line: #d7d0c2;
  --field: #fffaf0;
  --green: #176b4d;
  --amber: #a55d12;
  --black: #111611;
  --shadow: 0 18px 50px rgba(28, 24, 14, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(23, 107, 77, 0.09), transparent 42%),
    repeating-linear-gradient(90deg, rgba(23, 32, 27, 0.035) 0 1px, transparent 1px 26px),
    var(--paper);
  font-family: Avenir Next, Avenir, Helvetica Neue, Helvetica, sans-serif;
}

.shell {
  width: min(100%, 920px);
  margin: 0 auto;
  padding: 18px;
}

.supervisor-shell {
  display: grid;
  gap: 18px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 22px;
}

.masthead {
  margin-bottom: 22px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  line-height: 1;
  letter-spacing: 0;
}

h1 {
  font-size: 34px;
}

h2 {
  font-size: 24px;
}

.subtle {
  margin: 10px 0 0;
  color: var(--muted);
}

.form {
  display: grid;
  gap: 16px;
}

label,
fieldset {
  display: grid;
  gap: 7px;
  margin: 0;
  padding: 0;
  border: 0;
}

label span,
legend {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

input {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--field);
  color: var(--ink);
  font: inherit;
  font-size: 18px;
  padding: 10px 12px;
}

input:focus {
  border-color: var(--green);
  outline: 3px solid rgba(23, 107, 77, 0.16);
}

.segment {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.segment label {
  display: block;
}

.segment input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.segment span {
  display: grid;
  min-height: 48px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #f1eadb;
  color: var(--black);
  font-size: 17px;
}

.segment input:checked + span {
  border-color: var(--green);
  background: var(--green);
  color: white;
}

.actions,
.download-row,
.filters,
.toolbar {
  display: grid;
  gap: 10px;
}

.actions {
  grid-template-columns: 1fr 1fr;
}

button {
  min-height: 52px;
  border: 0;
  border-radius: 6px;
  color: white;
  cursor: pointer;
  font: inherit;
  font-size: 18px;
  font-weight: 800;
}

button:active {
  transform: translateY(1px);
}

.start {
  background: var(--green);
}

.end {
  background: var(--amber);
}

.ghost {
  border: 1px solid var(--line);
  background: #efe7d7;
  color: var(--ink);
  font-size: 15px;
}

.status {
  min-height: 24px;
  margin-top: 16px;
  color: var(--green);
  font-weight: 800;
}

.status.error {
  color: #a12f18;
}

.device {
  margin-top: 10px;
  color: var(--muted);
  font-size: 12px;
}

.device code {
  color: var(--ink);
  word-break: break-all;
}

.records-panel {
  overflow: hidden;
}

.toolbar {
  grid-template-columns: 1fr auto;
  align-items: center;
  margin-bottom: 16px;
}

.filters {
  grid-template-columns: 1fr 1fr;
  margin-bottom: 10px;
}

.download-row {
  grid-template-columns: 1fr;
  margin-bottom: 14px;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 6px;
}

table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  background: white;
}

th,
td {
  border-bottom: 1px solid #ebe5d9;
  padding: 10px;
  text-align: left;
  vertical-align: top;
  font-size: 13px;
}

th {
  background: #efe7d7;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

@media (min-width: 820px) {
  .supervisor-shell {
    grid-template-columns: 360px 1fr;
    align-items: start;
  }
}

@media (max-width: 560px) {
  .shell {
    padding: 10px;
  }

  .panel {
    padding: 18px;
  }

  h1 {
    font-size: 30px;
  }

  .filters,
  .download-row,
  .toolbar {
    grid-template-columns: 1fr;
  }
}