:root {
  color-scheme: light dark;
  --bg: #0f1115;
  --panel: #171a21;
  --border: #2a2e38;
  --text: #e6e8eb;
  --muted: #9aa1ac;
  --accent: #5b8cff;
  --accept: #35c07a;
  --review: #e0a92c;
  --error: #e05555;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height: 1.5;
}

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
  transition: max-width 0.15s ease;
}

.page.has-preview {
  max-width: 1100px;
}

h1 {
  margin-bottom: 0.25rem;
}

.intro {
  color: var(--muted);
  margin-top: 0;
}

.notice {
  background: #2a2410;
  border: 1px solid #5a4b16;
  border-radius: 8px;
  padding: 0.85rem 1rem;
  margin: 1.25rem 0;
  font-size: 0.92rem;
}

.notice strong {
  color: #f0c94a;
}

.notice p {
  margin: 0.4rem 0 0;
  color: var(--text);
}

#upload-form {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
}

.file-label {
  font-size: 0.9rem;
  color: var(--muted);
}

input[type="file"] {
  color: var(--text);
}

button {
  cursor: pointer;
  border: none;
  border-radius: 6px;
  padding: 0.6rem 1rem;
  font-size: 0.95rem;
  font-weight: 600;
}

#submit-btn {
  align-self: flex-start;
  background: var(--accent);
  color: white;
}

#submit-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.status {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  background: var(--panel);
  border: 1px solid var(--border);
}

.status.error {
  border-color: var(--error);
  color: #ff9c9c;
}

.workspace {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 1rem;
  align-items: start;
}

@media (min-width: 860px) {
  .workspace.has-preview.has-result {
    grid-template-columns: minmax(260px, 380px) 1fr;
  }
}

.preview-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
}

.preview-panel h2 {
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.preview-content img,
.preview-content iframe {
  display: block;
  width: 100%;
  max-height: 70vh;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.preview-content img {
  height: auto;
  object-fit: contain;
  background: var(--bg);
}

.preview-content iframe {
  height: 70vh;
  background: white;
}

.preview-fallback {
  padding: 1.25rem 1rem;
  border: 1px dashed var(--border);
  border-radius: 6px;
  color: var(--muted);
  font-size: 0.88rem;
  text-align: center;
}

.preview-fallback strong {
  display: block;
  color: var(--text);
  margin-bottom: 0.35rem;
  word-break: break-word;
}

.result {
  margin-top: 0;
}

.verdict {
  padding: 1rem 1.25rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  margin-bottom: 1rem;
}

.verdict.accept {
  border-color: var(--accept);
  background: rgba(53, 192, 122, 0.08);
}

.verdict.review {
  border-color: var(--review);
  background: rgba(224, 169, 44, 0.08);
}

.verdict h2 {
  margin: 0 0 0.35rem;
  font-size: 1.1rem;
}

.tabs {
  display: flex;
  gap: 0.4rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1rem;
}

.tab-btn {
  background: transparent;
  color: var(--muted);
  border-radius: 6px 6px 0 0;
  padding: 0.5rem 0.9rem;
  font-weight: 500;
}

.tab-btn.active {
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--border);
  border-bottom: none;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

th, td {
  text-align: left;
  padding: 0.4rem 0.5rem;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--muted);
  font-weight: 600;
}

.checks-group h3 {
  font-size: 0.95rem;
  margin: 1rem 0 0.4rem;
  color: var(--muted);
}

.check-line {
  padding: 0.3rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
}

.check-pass { color: var(--accept); }
.check-fail { color: var(--error); }
.check-skip { color: var(--muted); }

.details-list {
  font-size: 0.9rem;
  color: var(--muted);
}

.details-list div {
  padding: 0.2rem 0;
}