:root {
  color-scheme: light;
  --bg: #f7f7f5;
  --card: #ffffff;
  --text: #1d1d1b;
  --muted: #62625d;
  --border: #deded9;
  --accent: #2f6fdb;
  --accent-text: #ffffff;
  --warn: #9a5b00;
  --error: #b42318;
  --code-bg: #f0f0ec;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #161615;
    --card: #1f1f1e;
    --text: #ececea;
    --muted: #a3a39e;
    --border: #353533;
    --accent: #6b9cf0;
    --accent-text: #0f1626;
    --warn: #e0a54a;
    --error: #f97066;
    --code-bg: #2a2a28;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}

main, footer {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px;
}

header { padding-block: 32px 8px; }
h1 { margin: 0 0 4px; font-size: 28px; }
h2 { margin: 0 0 12px; font-size: 16px; }
.lede { margin: 0; color: var(--muted); }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 20px;
  margin-top: 16px;
}

.row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}
.spacer { flex: 1; }

.tool-row { margin-bottom: 12px; }
.tool-row > span { color: var(--muted); }
.tool-row label { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; }

.drop {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 28px 16px;
  border: 2px dashed var(--border);
  border-radius: 10px;
  cursor: pointer;
  text-align: center;
}
.drop:hover, .drop.over { border-color: var(--accent); }
.drop:focus-within { outline: 2px solid var(--accent); outline-offset: 2px; }
.drop input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.drop-main { font-weight: 600; }
.drop-sub { color: var(--muted); font-size: 13px; }

details { margin-top: 12px; color: var(--muted); }
details summary { cursor: pointer; color: var(--text); }
details ul { padding-left: 20px; }

code {
  background: var(--code-bg);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 13px;
  overflow-wrap: anywhere;
}

select, input[type="date"], button {
  font: inherit;
  padding: 7px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
}

button {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
  cursor: pointer;
}
button.secondary { background: var(--card); color: var(--text); border-color: var(--border); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

#status { color: var(--muted); }
#status.error { color: var(--error); }
.warn { color: var(--warn); margin: 8px 0 0; }

#result { margin-top: 24px; }
.result-bar { margin-bottom: 12px; }
#summary { color: var(--muted); }

#report {
  width: 100%;
  height: 85vh;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #ffffff;
}

footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  padding-block: 32px;
  color: var(--muted);
  font-size: 13px;
}
footer a { color: inherit; }