:root {
  color-scheme: light;
  --bg: #faf9f6;
  --surface: #ffffff;
  --surface-2: #f3f1ec;
  --border: #e7e3da;
  --border-strong: #d8d2c4;
  --text: #2b2a27;
  --text-dim: #74716a;
  --text-faint: #a39e93;
  --accent: #8b9cf0;
  --accent-hover: #7686e0;
  --accent-soft: #eef0fc;
  --success: #6fb98f;
  --success-soft: #eaf5ef;
  --danger: #e59a9a;
  --danger-soft: #faeeee;
  --radius: 10px;
  --radius-sm: 6px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px 60px;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 28px 0 0;
}
.logo-mark {
  height: 24px;
  width: auto;
  flex-shrink: 0;
  display: block;
}
.logo-name {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}

header { padding: 56px 0 32px; }
.eyebrow {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 10px;
}
header h1 {
  font-size: 1.7rem;
  font-weight: 650;
  letter-spacing: -0.015em;
  margin: 0 0 10px;
  line-height: 1.25;
  color: var(--text);
}
.subtitle {
  color: var(--text-dim);
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.5;
  max-width: 48ch;
}

.dropzone {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 44px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s ease, background .15s ease;
}
.dropzone:hover { border-color: var(--border-strong); }
.dropzone.dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
}
.dropzone-icon {
  display: flex;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--text-faint);
}
.dropzone-content p { margin: 0 0 6px; font-size: 0.92rem; color: var(--text); }
.hint { color: var(--text-faint); font-size: .8rem; margin-top: 10px !important; }

.status {
  margin-top: 16px;
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: .85rem;
  color: var(--text-dim);
}
.status.error { border-color: #ecc; color: #c17676; background: var(--danger-soft); }
.status.success { border-color: #cde; color: #4e9873; background: var(--success-soft); }

.result-box {
  margin-top: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 8px;
}
#resultFilename { font-size: .8rem; color: var(--text-dim); word-break: break-all; }
.result-actions { display: flex; gap: 6px; }
.result-actions button {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: .78rem;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
}
.result-actions button:hover { background: var(--accent-hover); }
#resetBtn { background: transparent; border: 1px solid var(--border); color: var(--text-dim); }
#resetBtn:hover { background: var(--surface-2); border-color: var(--border-strong); }

.result-text {
  margin: 0;
  padding: 16px;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: .8rem;
  line-height: 1.55;
  color: var(--text-dim);
  max-height: 55vh;
  overflow-y: auto;
  background: var(--surface);
}

footer {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--text-faint);
  font-size: .78rem;
}
footer a { color: var(--text-dim); }

@media (max-width: 480px) {
  .dropzone { padding: 32px 16px; }
  header { padding: 40px 0 28px; }
}