:root {
  color-scheme: light;
  --ink: #1c2430;
  --muted: #4a5668;
  --line: #d5dbe3;
  --paper: #f3f5f8;
  --card: #ffffff;
  --navy: #1f4e79;
  --navy-dark: #163a5b;
  --warn-bg: #fdecec;
  --warn-ink: #7a1f1f;
  --warn-line: #f0c2c2;
  --ok: #1d6b3a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.5 "Segoe UI", "Liberation Sans", "Nimbus Sans", sans-serif;
}

.page {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 20px 48px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--navy);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 8px;
  font-size: 36px;
  line-height: 1.15;
  font-weight: 600;
}

h2 {
  margin: 0 0 14px;
  font-size: 20px;
}

.lede,
.note,
.hint,
.runtime,
.chosen {
  color: var(--muted);
}

.lede {
  margin: 0;
  font-size: 18px;
}

.card {
  margin-top: 20px;
  padding: 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.dropzone {
  padding: 16px;
  border: 1px dashed #9aabbf;
  border-radius: 8px;
  background: #f8fafc;
}

.dropzone.is-dragover {
  border-color: var(--navy);
  background: #e8f1f8;
}

.file-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
}

.file-input {
  display: block;
  width: 100%;
  max-width: 100%;
}

.chosen,
.hint,
.runtime,
.note {
  margin: 10px 0 0;
}

.actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 16px;
}

.button {
  appearance: none;
  border: 0;
  border-radius: 6px;
  padding: 10px 16px;
  background: var(--navy);
  color: #ffffff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.button:hover {
  background: var(--navy-dark);
}

.button:focus,
.file-input:focus {
  outline: 2px solid var(--navy);
  outline-offset: 2px;
}

.button:disabled {
  opacity: 0.6;
  cursor: wait;
}

.busy-note {
  display: none;
  margin: 0;
  color: var(--navy);
  font-weight: 600;
}

body.is-busy .busy-note {
  display: block;
}

.message {
  margin: 14px 0 0;
  padding: 10px 12px;
  color: var(--warn-ink);
  background: var(--warn-bg);
  border: 1px solid var(--warn-line);
  border-radius: 6px;
}

.runtime .ready {
  color: var(--ok);
}

.runtime .warn {
  color: #7a4e00;
}

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

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

th {
  font-size: 13px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

[hidden] {
  display: none !important;
}

@media (max-width: 640px) {
  h1 {
    font-size: 30px;
  }

  .actions {
    align-items: flex-start;
    flex-direction: column;
  }
}