:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --ink: #1c1f26;
  --muted: #6b7280;
  --brand: #111318;
  --accent: #2563eb;
  --ok: #16a34a;
  --warn: #dc2626;
  --border: #e2e4e9;
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  padding-bottom: 40px;
}

header.topbar {
  background: var(--brand);
  color: #fff;
  padding: 18px 20px;
  position: sticky;
  top: 0;
  z-index: 10;
}

header.topbar h1 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
}

header.topbar .sub {
  font-size: 0.85rem;
  color: #b7bac2;
  margin-top: 2px;
}

header.topbar a.back {
  color: #fff;
  text-decoration: none;
  font-size: 0.9rem;
  display: inline-block;
  margin-bottom: 6px;
  opacity: 0.85;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 16px;
}

.grid {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}

@media (min-width: 560px) {
  .grid { grid-template-columns: 1fr 1fr; }
}

a.card, .card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  text-decoration: none;
  color: var(--ink);
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}

a.card:active { transform: scale(0.98); }

.card h2 {
  margin: 0 0 4px;
  font-size: 1.05rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.card .tag {
  display: inline-block;
  margin-top: 10px;
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 600;
}

.card.disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.card.disabled .tag {
  color: var(--muted);
}

.card .icon {
  font-size: 1.6rem;
  display: block;
  margin-bottom: 8px;
}

.link-row {
  margin-top: 24px;
  text-align: center;
}

.link-row a {
  color: var(--muted);
  font-size: 0.9rem;
}

form.entry-form {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 6px;
}

.field .ref {
  font-weight: 400;
  color: var(--muted);
  font-size: 0.78rem;
}

.field input, .field select {
  width: 100%;
  padding: 12px 14px;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fafafa;
}

.field input:focus, .field select:focus {
  outline: 2px solid var(--accent);
  background: #fff;
}

.field.out-of-range input {
  border-color: var(--warn);
  background: #fef2f2;
}

.field .warn-text {
  color: var(--warn);
  font-size: 0.78rem;
  margin-top: 4px;
  display: none;
}

.field.out-of-range .warn-text { display: block; }

.row2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.temp-input-row {
  display: flex;
  gap: 8px;
}

.temp-input-row input {
  flex: 1;
}

.sign-toggle {
  flex: 0 0 48px;
  font-size: 1.3rem;
  font-weight: 700;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fafafa;
  color: var(--ink);
  cursor: pointer;
}

.sign-toggle.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

button.primary {
  width: 100%;
  padding: 14px;
  font-size: 1rem;
  font-weight: 700;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}

button.primary:active { opacity: 0.85; }

button.secondary {
  width: 100%;
  padding: 12px;
  font-size: 0.9rem;
  font-weight: 600;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
}

.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  color: #fff;
  padding: 12px 18px;
  border-radius: 10px;
  font-size: 0.9rem;
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
  z-index: 50;
}

.toast.show { opacity: 1; }
.toast.error { background: var(--warn); }

.section-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 24px 0 10px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

table.data {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 0.82rem;
}

table.data th, table.data td {
  border: 1px solid var(--border);
  padding: 7px 8px;
  text-align: center;
}

table.data th {
  background: #f0f1f4;
  font-weight: 700;
  font-size: 0.72rem;
}

table.data td.oor {
  color: var(--warn);
  font-weight: 700;
  background: #fef2f2;
}

table.data td.label {
  text-align: left;
  font-weight: 600;
}

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.controls-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 8px;
  margin-bottom: 16px;
}

.entry-list {
  margin-top: 22px;
}

.entry-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
}

.entry-item .meta { color: var(--muted); font-size: 0.78rem; }

.entry-item button {
  border: none;
  background: none;
  color: var(--warn);
  font-size: 0.8rem;
  cursor: pointer;
  padding: 4px 6px;
}

.empty-state {
  text-align: center;
  color: var(--muted);
  padding: 30px 10px;
  font-size: 0.9rem;
}