:root {
  --bg: #0f172a;
  --card: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #38bdf8;
  --border: #1f2937;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif; }
header, footer { max-width: 900px; margin: 24px auto; padding: 0 16px; }
h1 { font-size: 1.6rem; margin: 0 0 8px; }
main { max-width: 900px; margin: 0 auto 48px; padding: 0 16px; display: grid; gap: 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 16px; box-shadow: 0 6px 24px rgba(0,0,0,0.25); }
#dropzone { text-align: center; cursor: pointer; outline: 2px dashed var(--border); outline-offset: -8px; transition: outline-color .15s ease; }
#dropzone.hover { outline-color: var(--accent); }
#dropzone p { color: var(--muted); margin: 8px 0 12px; }
#file { display: none; }

#previewWrap { display: grid; gap: 12px; }
#preview { max-width: 100%; border-radius: 12px; display: block; }

.status { color: var(--muted); padding: 0 2px; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }