:root {
  --bg: #0e1116;
  --panel: #161b22;
  --panel-2: #1f242c;
  --border: #2a313c;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #58a6ff;
  --pass: #3fb950;
  --fail: #f85149;
  --warn: #d29922;
  --skip: #6e7681;
  --mono: ui-monospace, SFMono-Regular, "Menlo", "Cascadia Mono", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Pretendard Variable", "Pretendard", "Apple SD Gothic Neo",
    "Segoe UI", "Noto Sans KR", sans-serif;
  font-size: 15px;
  line-height: 1.55;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand .logo { color: var(--pass); font-size: 14px; }
.brand .title { font-weight: 600; }
.meta { color: var(--muted); font-size: 13px; }

main {
  max-width: 880px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}

.hero h1 {
  margin: 8px 0 6px;
  font-size: 24px;
  letter-spacing: -0.01em;
}
.subtle { color: var(--muted); }

.dropzone {
  margin-top: 18px;
  border: 1.5px dashed var(--border);
  border-radius: 14px;
  padding: 36px 16px;
  text-align: center;
  background: var(--panel);
  transition: border-color 0.15s ease, background 0.15s ease;
  cursor: pointer;
}
.dropzone.drag {
  border-color: var(--accent);
  background: rgba(88, 166, 255, 0.06);
}
.dz-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.dz-label strong { font-size: 16px; }

button {
  background: var(--accent);
  color: #0b0f15;
  border: none;
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
button:hover { filter: brightness(1.05); }

.banner {
  margin-top: 18px;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  font-size: 14px;
}
.banner.error { border-color: var(--fail); color: var(--fail); }
.banner.info { border-color: var(--accent); color: var(--accent); }

.results { margin-top: 28px; }

.overall {
  padding: 16px 18px;
  border-radius: 12px;
  border: 1px solid var(--border);
  font-weight: 600;
  background: var(--panel);
}
.overall.pass { border-color: var(--pass); color: var(--pass); background: rgba(63, 185, 80, 0.06); }
.overall.fail { border-color: var(--fail); color: var(--fail); background: rgba(248, 81, 73, 0.06); }
.overall.partial { border-color: var(--warn); color: var(--warn); background: rgba(210, 153, 34, 0.06); }

.subtle-card {
  margin-top: 14px;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel);
  font-family: var(--mono);
  font-size: 12.5px;
  white-space: pre-wrap;
  color: var(--muted);
}

.steps {
  list-style: none;
  padding: 0;
  margin: 14px 0;
}
.step {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 8px;
  background: var(--panel);
}
.step .icon {
  width: 26px;
  height: 26px;
  border-radius: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
}
.step.pass .icon { background: rgba(63, 185, 80, 0.15); color: var(--pass); }
.step.fail .icon { background: rgba(248, 81, 73, 0.15); color: var(--fail); }
.step.skip .icon { background: rgba(110, 118, 129, 0.18); color: var(--skip); }
.step.error .icon { background: rgba(210, 153, 34, 0.15); color: var(--warn); }

.step h3 {
  margin: 0 0 4px;
  font-size: 14px;
  font-weight: 600;
}
.step .detail {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--muted);
  white-space: pre-wrap;
  word-break: break-all;
}

details.raw {
  margin-top: 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 12px;
}
details.raw summary { cursor: pointer; color: var(--muted); font-size: 13px; }
details.raw pre {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  white-space: pre-wrap;
  word-break: break-all;
  margin: 8px 0 0;
}

.explain {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.explain h2 { font-size: 16px; margin: 0 0 10px; }
.explain ul { margin: 0; padding-left: 18px; }
.explain li { margin-bottom: 8px; color: var(--muted); }
.explain li strong { color: var(--text); }
.explain pre {
  background: var(--panel-2);
  padding: 8px 10px;
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--text);
  margin: 6px 0 0;
}

code {
  font-family: var(--mono);
  font-size: 12.5px;
  background: var(--panel-2);
  padding: 1px 5px;
  border-radius: 4px;
}

footer {
  text-align: center;
  padding: 24px 12px;
  font-size: 12px;
  border-top: 1px solid var(--border);
  background: var(--panel);
}

@media (max-width: 600px) {
  main { padding: 20px 14px 60px; }
  .hero h1 { font-size: 20px; }
  .topbar { padding: 12px 16px; }
  .topbar .meta { display: none; }
}