:root {
  --bg: #f3f4f6;
  --card: #ffffff;
  --text: #111827;
  --muted: #4b5563;
  --border: rgba(17, 24, 39, 0.14);

  --primary: #2563eb;
  --primaryText: #ffffff;
  --secondary: #e5e7eb;
  --secondaryText: #111827;

  --shadow: 0 10px 30px rgba(0,0,0,.08);

  --focus: rgba(37, 99, 235, 0.35);
  --error: #b91c1c;

  --radius: 16px;
}

[data-theme="dark"] {
  --bg: #0b1220;
  --card: #0f172a;
  --text: #e5e7eb;
  --muted: #a3a3a3;
  --border: rgba(229, 231, 235, 0.18);

  --primary: #60a5fa;
  --primaryText: #081226;
  --secondary: #1f2937;
  --secondaryText: #e5e7eb;

  --shadow: 0 10px 30px rgba(0,0,0,.35);

  --focus: rgba(96, 165, 250, 0.35);
  --error: #ef4444;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background: var(--bg);
  color: var(--text);
}

.app {
  max-width: 980px;
  margin: 0 auto;
  padding: 22px 16px 28px;
}

.topbar {
  display: flex;
  gap: 18px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.logo{
  width: 70px;
  height: auto;
  border-radius: 90px;
  display: grid;
  place-items: center;
  display: block;
}

h1 {
  margin: 0;
  font-size: 18px;
  letter-spacing: .2px;
}

.subtitle {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.theme {
  display: flex;
  gap: 10px;
  align-items: center;
}

.label { color: var(--muted); font-size: 13px; }

.select, input[type="date"] {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  font-size: 14px;
  outline: none;
}

.select:focus, input[type="date"]:focus, .btn:focus {
  box-shadow: 0 0 0 4px var(--focus);
}

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

.form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  align-items: end;
}

@media (max-width: 720px) {
  .form { grid-template-columns: 1fr; }
}

.field label {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  color: var(--muted);
}

.hint { margin-top: 6px; color: var(--muted); font-size: 12px; }

.error {
  margin-top: 8px;
  color: var(--error);
  font-size: 12px;
  min-height: 16px;
}

.actions {
  grid-column: 1 / -1;
  display: flex;
  gap: 12px;
  justify-content: flex-start;
  flex-wrap: wrap;
}

.btn {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 650;
  font-size: 14px;
}

.btn.primary {
  background: var(--primary);
  color: var(--primaryText);
  border-color: rgba(0,0,0,0.0);
}

.btn.secondary {
  background: var(--secondary);
  color: var(--secondaryText);
}

.results {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

@media (max-width: 900px) {
  .results { grid-template-columns: 1fr; }
}

.stat {
  padding: 14px;
  border-radius: 14px;
  background: rgba(127, 127, 127, 0.06);
  border: 1px solid rgba(127, 127, 127, 0.12);
}

.statLabel {
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 6px;
}

.statValue {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: .3px;
}

.statSub {
  margin-top: 8px;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.35;
}

.summary {
  grid-column: 1 / -1;
  margin-top: 2px;
}

.pill {
  display: inline-block;
  padding: 10px 12px;
  border-radius: 999px;
  background: rgba(127, 127, 127, 0.10);
  border: 1px solid rgba(127, 127, 127, 0.15);
  color: var(--muted);
  font-size: 13px;
}

.footer {
  margin-top: 16px;
  color: var(--muted);
  font-size: 12.5px;
}