:root {
  color-scheme: light dark;
  --bg: #f7f7f8;
  --fg: #1b1b1f;
  --muted: #6b6b73;
  --accent: #2f6feb;
  --accent-fg: #ffffff;
  --border: #d9d9de;
  --card-bg: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16161a;
    --fg: #ececef;
    --muted: #9a9aa2;
    --accent: #5b8def;
    --accent-fg: #0b0b0d;
    --border: #2c2c33;
    --card-bg: #1e1e23;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.page {
  max-width: 640px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header { margin-bottom: 2.5rem; }
.brand { font-weight: 700; font-size: 1.25rem; color: var(--fg); text-decoration: none; }

main { flex: 1; }

h1 { font-size: 1.5rem; margin-bottom: 0.5rem; }
.subtitle { color: var(--muted); margin-top: 0; margin-bottom: 1.75rem; }

.dropzone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 2.5rem 1rem;
  text-align: center;
  cursor: pointer;
  color: var(--muted);
  transition: border-color 0.15s, background 0.15s;
}
.dropzone.dragover { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, transparent); }

.field-row { display: flex; align-items: center; gap: 0.75rem; margin: 1.25rem 0; }
.field-row label { color: var(--muted); font-size: 0.9rem; }
.checkbox-row { gap: 0.5rem; }
.checkbox-row input { width: auto; }
.checkbox-row label { color: var(--fg); }

select, input[type="text"] {
  background: var(--card-bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 0.65rem;
  font-size: 0.95rem;
}

button, .button {
  background: var(--accent);
  color: var(--accent-fg);
  border: none;
  border-radius: 8px;
  padding: 0.65rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}
button:disabled { opacity: 0.5; cursor: not-allowed; }

.progress-wrap {
  height: 6px;
  border-radius: 3px;
  background: var(--border);
  overflow: hidden;
  margin-top: 1rem;
}
.progress-bar { height: 100%; width: 0; background: var(--accent); transition: width 0.1s linear; }

.result { margin-top: 1.5rem; }
.link-row { display: flex; gap: 0.5rem; margin-bottom: 0.5rem; }
.link-row input { flex: 1; }
.delete-hint { color: var(--muted); font-size: 0.85rem; margin-top: 1.5rem; margin-bottom: 0.5rem; }
.delete-status { color: var(--muted); font-size: 0.85rem; }

.error {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  background: color-mix(in srgb, #d64545 12%, transparent);
  color: #d64545;
}

.file-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem 1.5rem;
  text-align: center;
}
.filename { font-weight: 600; font-size: 1.1rem; word-break: break-all; margin: 0 0 0.25rem; }
.filesize { color: var(--muted); margin: 0 0 1.5rem; }
.burn-warning { color: #b8860b; font-size: 0.85rem; margin: 1rem 0 0; }

.site-footer { margin-top: 3rem; color: var(--muted); font-size: 0.8rem; }