:root {
  color-scheme: light;
  --bg: #eef4ff;
  --card: #ffffff;
  --text: #172033;
  --muted: #64748b;
  --primary: #155eef;
  --primary-dark: #0f47bd;
  --success: #067647;
  --success-bg: #ecfdf3;
  --danger: #b42318;
  --danger-bg: #fef3f2;
  --warning-bg: #fffaeb;
  --warning-border: #fedf89;
  --border: #dbe4f0;
  --shadow: 0 16px 48px rgba(22, 34, 51, 0.12);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(160deg, #eaf2ff 0%, #f7fbff 48%, #eef4ff 100%);
  color: var(--text);
  min-height: 100vh;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  padding: calc(1rem + env(safe-area-inset-top)) 1rem 1rem;
  background: rgba(238, 244, 255, 0.9);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(219, 228, 240, 0.8);
}

main {
  width: min(760px, 100%);
  margin: 0 auto;
  padding: 1rem 1rem 6rem;
}

h1, h2, p { margin-top: 0; }
h1 { font-size: clamp(1.55rem, 7vw, 2.4rem); margin-bottom: 0; line-height: 1; }
h2 { font-size: 1.08rem; margin-bottom: 1rem; }

.eyebrow {
  color: var(--primary);
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-size: .72rem;
  margin-bottom: .4rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 1.2rem;
  padding: 1rem;
  margin: 0 0 1rem;
  box-shadow: var(--shadow);
}

.warning {
  background: var(--warning-bg);
  border-color: var(--warning-border);
}

label {
  display: block;
  font-weight: 700;
  margin: .85rem 0 .45rem;
}

input, select, textarea {
  width: 100%;
  font: inherit;
  border: 1px solid #cbd5e1;
  border-radius: .85rem;
  padding: .82rem .9rem;
  background: #fff;
  color: var(--text);
}

textarea { min-height: 6rem; resize: vertical; }

button {
  border: 0;
  border-radius: 999px;
  padding: .9rem 1rem;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  font-size: 1rem;
  min-height: 48px;
  cursor: pointer;
  box-shadow: 0 12px 24px rgba(21, 94, 239, 0.22);
}

button:active { transform: translateY(1px); }
button.secondary { color: var(--primary); background: #e8f0ff; box-shadow: none; }
button.danger { color: var(--danger); background: var(--danger-bg); box-shadow: none; }
button:disabled { opacity: .55; cursor: not-allowed; transform: none; }

.button-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .75rem;
}
.button-row.compact { grid-template-columns: 1fr; }

.hint, .muted, footer {
  color: var(--muted);
  font-size: .92rem;
}

.location-details {
  margin-top: .75rem;
  padding: .8rem;
  border-radius: .85rem;
  background: #f8fafc;
  color: var(--muted);
  line-height: 1.45;
}

.gps-status {
  margin: .75rem 0;
  padding: .75rem;
  border-radius: .85rem;
  background: #f8fafc;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: .75rem;
  margin: .75rem 0;
}
.metric-grid div {
  border: 1px solid var(--border);
  border-radius: .85rem;
  padding: .75rem;
  background: #fbfdff;
}
.metric-grid span {
  display: block;
  color: var(--muted);
  font-size: .78rem;
  margin-bottom: .25rem;
}
.metric-grid strong { font-size: .95rem; word-break: break-word; }

.radius-result {
  border-radius: .85rem;
  padding: .9rem;
  font-weight: 900;
  text-align: center;
}
.radius-result.inside { color: var(--success); background: var(--success-bg); }
.radius-result.outside { color: var(--danger); background: var(--danger-bg); }
.radius-result.neutral { color: var(--muted); background: #f8fafc; }

.feedback { margin: .9rem 0 0; font-weight: 700; }
.section-title-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: .75rem;
}
.pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: .35rem .65rem;
  color: var(--primary);
  background: #e8f0ff;
  font-weight: 800;
  font-size: .78rem;
  white-space: nowrap;
}
.records-list { margin-top: 1rem; display: grid; gap: .75rem; }
.record {
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: .85rem;
  background: #fbfdff;
}
.record h3 { margin: 0 0 .35rem; font-size: 1rem; }
.record dl {
  display: grid;
  grid-template-columns: 6.5rem 1fr;
  gap: .25rem .5rem;
  margin: 0;
  color: var(--muted);
  font-size: .88rem;
}
.record dt { font-weight: 800; color: #475569; }
.record dd { margin: 0; word-break: break-word; }

footer {
  text-align: center;
  padding: 1rem;
}

@media (min-width: 560px) {
  .button-row.compact { grid-template-columns: 1fr 1fr; }
  .card { padding: 1.25rem; }
}