:root {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #172033;
  background: #f3f6fb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
}

.app {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0;
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  color: #566277;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-size: .8rem;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.2rem);
}

.intro {
  max-width: 700px;
  color: #566277;
  line-height: 1.6;
}

.settings {
  background: white;
  border: 1px solid #dde5f2;
  border-radius: 18px;
  padding: 16px;
  min-width: 280px;
  display: grid;
  gap: 14px;
  box-shadow: 0 12px 30px rgba(29, 45, 68, .08);
}

.settings label {
  display: grid;
  gap: 8px;
  font-size: .9rem;
  color: #566277;
}

.settings input,
.settings select {
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
  color: #172033;
}

.settings small {
  color: #566277;
  line-height: 1.4;
}

.drop-zone {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 190px;
  border: 2px dashed #9aa8bd;
  border-radius: 24px;
  background: white;
  cursor: pointer;
  transition: .2s ease;
}

.drop-zone.dragover {
  border-color: #2f6fed;
  background: #eef4ff;
}

.drop-zone input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.drop-content {
  display: grid;
  gap: 8px;
  text-align: center;
  color: #566277;
}

.drop-content strong {
  color: #172033;
  font-size: 1.25rem;
}

.summary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin: 24px 0;
}

.card {
  background: white;
  border: 1px solid #dde5f2;
  border-radius: 20px;
  padding: 20px;
  box-shadow: 0 12px 30px rgba(29, 45, 68, .08);
}

.card span {
  display: block;
  color: #566277;
  font-size: .9rem;
  margin-bottom: 8px;
}

.card strong {
  display: block;
  font-size: 1.8rem;
}

.positive { color: #137333; }
.negative { color: #b3261e; }
.neutral { color: #172033; }

.results {
  background: white;
  border: 1px solid #dde5f2;
  border-radius: 24px;
  padding: 24px;
  box-shadow: 0 12px 30px rgba(29, 45, 68, .08);
}

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

.table-header h2 { margin: 0; }

button {
  border: 0;
  border-radius: 12px;
  background: #172033;
  color: white;
  padding: 10px 14px;
  font: inherit;
  cursor: pointer;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
}

th, td {
  padding: 12px 10px;
  border-bottom: 1px solid #e6edf7;
  text-align: left;
  white-space: nowrap;
}

th {
  color: #566277;
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.details {
  margin-top: 24px;
}

.details summary {
  cursor: pointer;
  font-weight: 700;
  margin-bottom: 16px;
}

.error {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 14px;
  background: #fff1f0;
  border: 1px solid #ffccc7;
  color: #8a1f11;
}

.hidden { display: none; }

@media (max-width: 820px) {
  .hero { display: grid; align-items: start; }
  .summary { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 520px) {
  .summary { grid-template-columns: 1fr; }
}

.hint {
  color: #566277;
  margin: 16px 0 0;
  font-size: .95rem;
}