:root {
  --abtg-orange: #F47920;
  --abtg-orange-dark: #D8651A;
  --abtg-orange-light: #FFE9D6;
  --abtg-ink: #1B1B1B;
  --abtg-muted: #6B6B6B;
  --abtg-bg: #FAF8F6;
  --abtg-card: #FFFFFF;
  --abtg-border: #ECE8E3;
  --abtg-success: #1F8A4C;
  --abtg-error: #C0392B;
  --shadow-sm: 0 1px 2px rgba(15, 15, 15, 0.04), 0 1px 1px rgba(15, 15, 15, 0.03);
  --shadow-md: 0 8px 24px rgba(15, 15, 15, 0.06), 0 2px 6px rgba(15, 15, 15, 0.04);
  --radius: 14px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--abtg-bg);
  color: var(--abtg-ink);
  font-family: 'Inter', system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.topbar {
  background: var(--abtg-card);
  border-bottom: 1px solid var(--abtg-border);
  padding: 18px 28px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  max-width: 880px;
  margin: 0 auto;
}

.logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: block;
  object-fit: contain;
  box-shadow: var(--shadow-sm);
}

.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { font-size: 16px; letter-spacing: -0.01em; }
.brand-text span { font-size: 13px; color: var(--abtg-muted); }

.container {
  max-width: 880px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.hero h1 {
  font-size: 32px;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
  font-weight: 800;
}

.hero p {
  margin: 0 0 28px;
  color: var(--abtg-muted);
  font-size: 16px;
  line-height: 1.55;
}

.hero code {
  background: var(--abtg-orange-light);
  color: var(--abtg-orange-dark);
  padding: 1px 7px;
  border-radius: 6px;
  font-size: 0.92em;
}

.dropzone {
  background: var(--abtg-card);
  border: 2px dashed #D9D2C9;
  border-radius: var(--radius);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.18s, background-color 0.18s, transform 0.06s;
  box-shadow: var(--shadow-sm);
  outline: none;
}

.dropzone:hover,
.dropzone:focus-visible {
  border-color: var(--abtg-orange);
  background: #FFFDFB;
}

.dropzone.dragover {
  border-color: var(--abtg-orange);
  background: var(--abtg-orange-light);
  transform: scale(1.005);
}

.dz-icon {
  width: 48px;
  height: 48px;
  color: var(--abtg-orange);
  margin: 0 auto 12px;
  display: block;
}

.dz-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
}

.dz-sub {
  color: var(--abtg-muted);
  font-size: 14px;
  margin-bottom: 14px;
}

.dz-sub .link {
  color: var(--abtg-orange);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}

.dz-hint {
  color: #9C9590;
  font-size: 12px;
}

.status {
  margin-top: 20px;
  padding: 14px 16px;
  border-radius: 12px;
  font-size: 14px;
  border: 1px solid var(--abtg-border);
  background: var(--abtg-card);
}

.status.error { border-color: #F2C7C0; background: #FDF1EF; color: var(--abtg-error); }
.status.loading { border-color: #FFD9B5; background: #FFF6EC; color: var(--abtg-orange-dark); }

.result {
  margin-top: 24px;
  background: var(--abtg-card);
  border: 1px solid var(--abtg-border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow-md);
}

.result-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.result-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
}

.result-title::before {
  content: "✓";
  display: inline-block;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--abtg-success);
  color: #fff;
  text-align: center;
  line-height: 22px;
  font-size: 13px;
  margin-right: 8px;
  vertical-align: -3px;
}

.result-meta {
  color: var(--abtg-muted);
  font-size: 14px;
}

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

.btn {
  appearance: none;
  border: 1px solid transparent;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s, transform 0.05s, border-color 0.15s, color 0.15s;
}

.btn:active { transform: translateY(1px); }

.btn.primary {
  background: var(--abtg-orange);
  color: #fff;
  box-shadow: 0 4px 12px rgba(244, 121, 32, 0.25);
}
.btn.primary:hover { background: var(--abtg-orange-dark); }

.btn.ghost {
  background: transparent;
  color: var(--abtg-ink);
  border-color: var(--abtg-border);
}
.btn.ghost:hover { background: #F4EFEA; }

.preview {
  margin-top: 18px;
  border-top: 1px solid var(--abtg-border);
  padding-top: 14px;
}
.preview summary {
  cursor: pointer;
  color: var(--abtg-muted);
  font-size: 13px;
  font-weight: 600;
}
.preview pre {
  margin: 12px 0 0;
  background: #FBF8F4;
  border: 1px solid var(--abtg-border);
  border-radius: 8px;
  padding: 12px;
  font-size: 12.5px;
  overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: #3A3A3A;
}

.info {
  margin-top: 36px;
  padding: 22px;
  background: var(--abtg-card);
  border: 1px solid var(--abtg-border);
  border-radius: var(--radius);
}
.info h2 { margin: 0 0 12px; font-size: 16px; }
.info ol { margin: 0; padding-left: 20px; color: var(--abtg-muted); font-size: 14px; line-height: 1.7; }
.info ol strong { color: var(--abtg-ink); }
.privacy { margin: 14px 0 0; font-size: 12.5px; color: #9C9590; }

.footer {
  text-align: center;
  padding: 24px;
  color: #9C9590;
  font-size: 12.5px;
  border-top: 1px solid var(--abtg-border);
  background: var(--abtg-card);
}

@media (max-width: 540px) {
  .container { padding: 28px 16px 60px; }
  .hero h1 { font-size: 26px; }
  .dropzone { padding: 36px 16px; }
  .actions { width: 100%; }
  .actions .btn { flex: 1; }
}