:root {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --bg: #f6f8fc;
  --card-bg: #ffffff;
  --text: #1e293b;
  --muted: #5b6b81;
  --border: #d8e0ef;
  --primary: #2563eb;
  --primary-soft: #e8f0ff;
}

body {
  margin: 24px;
  line-height: 1.45;
  color: var(--text);
  background: radial-gradient(circle at top right, #eaf2ff 0, var(--bg) 45%);
}

h1 {
  margin: 0 0 8px;
  font-size: 1.6rem;
}

.help {
  margin: 0 0 14px;
  color: var(--muted);
}

.tabs {
  display: flex;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border);
  gap: 6px;
}

.tab-btn,
button,
select,
input[type="file"] {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 9px 14px;
  background: #fff;
  color: var(--text);
}

.tab-btn,
button {
  cursor: pointer;
}

.tab-btn {
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  border-bottom: none;
  background: #f7faff;
  margin-bottom: -1px;
  font-weight: 600;
}

.tab-btn:hover {
  background: #edf4ff;
}

.tab-btn.active {
  background: var(--card-bg);
  border-color: #bfccec;
  box-shadow: 0 -1px 0 #bfccec;
}

button {
  background: linear-gradient(180deg, #2d7cff 0%, #2563eb 100%);
  color: #fff;
  border-color: #1f57cf;
  font-weight: 600;
}

button:hover {
  filter: brightness(1.04);
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  margin-bottom: 12px;
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.06);
}

.grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

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

.meta {
  margin-top: 8px;
  color: var(--muted);
  min-height: 1.2em;
}

.preview-canvas {
  margin-top: 10px;
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
}

.inline-options {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.actions {
  margin-top: 12px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.status {
  margin-top: 8px;
  min-height: 1.2em;
  color: var(--muted);
}

.usage-image {
  margin-top: 8px;
  width: 100%;
  max-width: 520px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  display: block;
}

#downloadLink {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  background: var(--primary-soft);
  border: 1px solid #c8dafd;
  border-radius: 10px;
  padding: 9px 14px;
}

#downloadLink:hover {
  background: #dce9ff;
}

iframe {
  width: 100%;
  min-height: 620px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
}

.thumb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
}

.thumb-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px;
}

.thumb-ellipsis {
  display: grid;
  place-items: center;
  min-height: 120px;
  color: var(--muted);
  border: 1px dashed var(--border);
  border-radius: 10px;
  background: #f9fbff;
  font-size: 0.9rem;
}

.thumb-item canvas {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 6px;
  border: 1px solid #e4eaf6;
  background: #fff;
}

.thumb-label {
  margin-top: 6px;
  font-size: 0.8rem;
  color: var(--muted);
  text-align: center;
}

.thumb-tags {
  margin-top: 6px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
}

.thumb-tag {
  font-size: 0.72rem;
  color: #355079;
  background: #eef4ff;
  border: 1px solid #d5e3ff;
  border-radius: 999px;
  padding: 2px 7px;
}

[hidden] {
  display: none !important;
}