:root {
  --bg: #f6f8fb;
  --panel: #ffffff;
  --text: #1d2738;
  --muted: #667085;
  --brand: #0f69ff;
  --brand-soft: #dcebff;
  --border: #d9e1ee;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  background: radial-gradient(circle at top right, #dbeafe 0%, #f6f8fb 45%, #edf3ff 100%);
  color: var(--text);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 10px 30px rgba(17, 24, 39, 0.07);
}

h1,
h2 {
  margin: 0;
}

.sub {
  margin: 8px 0 16px;
  color: var(--muted);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 14px;
}

.field.inline {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 900px) {
  .field.inline.two-cols {
    grid-template-columns: 1fr 1fr;
  }
}

label {
  font-size: 14px;
  color: #334155;
}

textarea,
select,
input {
  width: 100%;
  border: 1px solid #cdd8ec;
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
  background: #fff;
}

textarea:focus,
select:focus,
input:focus {
  outline: 2px solid #bfdbfe;
  border-color: #93c5fd;
}

.switches {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

button {
  border: none;
  border-radius: 10px;
  background: linear-gradient(135deg, #0f4ed9, #3b82f6);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  padding: 10px 16px;
  cursor: pointer;
}

button.secondary {
  background: #e8eef8;
  color: #334155;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.status {
  min-height: 20px;
  margin: 10px 0 0;
  color: var(--muted);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.chip {
  font-size: 12px;
  line-height: 1;
  border-radius: 999px;
  padding: 7px 10px;
  background: var(--brand-soft);
  color: #1e429f;
}

.result img {
  width: 100%;
  max-height: 680px;
  object-fit: contain;
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-top: 10px;
}

.preview-stage {
  margin-top: 10px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: linear-gradient(145deg, #f8fafc, #eef3fb);
  padding: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 220px;
}

.preview-frame {
  width: min(100%, var(--frame-width, 420px));
  aspect-ratio: var(--preview-ratio, 1 / 1);
  border: 1px solid #d5deec;
  overflow: hidden;
  background: #edf2f7;
}

.preview-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  margin: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.preview-stage.preview-portrait .preview-frame {
  --frame-width: 260px;
  border-radius: 24px;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.18);
}

.preview-stage.preview-square .preview-frame {
  --frame-width: 360px;
  border-radius: 16px;
  box-shadow: 0 8px 22px rgba(15, 23, 42, 0.12);
}

.preview-stage.preview-landscape .preview-frame {
  --frame-width: 620px;
  border-radius: 10px;
  box-shadow: 0 10px 26px rgba(15, 23, 42, 0.14);
}

@media (max-width: 800px) {
  .preview-stage.preview-portrait .preview-frame {
    --frame-width: 220px;
  }

  .preview-stage.preview-square .preview-frame {
    --frame-width: min(86vw, 340px);
  }

  .preview-stage.preview-landscape .preview-frame {
    --frame-width: min(94vw, 560px);
  }
}

pre {
  margin-top: 10px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #0f172a;
  color: #cbd5e1;
  padding: 12px;
  max-height: 320px;
  overflow: auto;
  font-size: 12px;
}

.hidden {
  display: none;
}