/* Basic modern, readable styles. */
:root {
  --bg: #0f172a;
  --card: #111827;
  --muted: #94a3b8;
  --text: #e5e7eb;
  --primary: #2563eb;
  --primary-600: #1d4ed8;
  --danger: #ef4444;
  --border: #1f2937;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica Neue, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: linear-gradient(180deg, #0b1220, var(--bg));
  color: var(--text);
}

.container { max-width: 1100px; margin: 0 auto; padding: 24px; }
.page-header { text-align: center; margin-bottom: 24px; }
.page-header h1 { margin: 0 0 8px; font-size: 32px; }
.page-header .subtitle { margin: 0; color: var(--muted); }

.grid { display: grid; gap: 16px; grid-template-columns: 1fr; }
@media (min-width: 900px) { .grid { grid-template-columns: 1fr 1fr; } }

.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.card-header { padding: 14px 16px; font-weight: 600; border-bottom: 1px solid var(--border); }
.card-body { padding: 16px; }

.dropzone {
  border: 2px dashed #334155; border-radius: 12px; padding: 28px; text-align: center; outline: none; cursor: pointer;
  display: flex; flex-direction: column; align-items: center; gap: 10px; background: #0b1220;
}
.dropzone:focus { box-shadow: 0 0 0 3px rgba(37, 99, 235, .3); }
.dz-illustration { width: 72px; height: 56px; background: linear-gradient(180deg, #1f2937, #0b1220); border-radius: 8px; }
.dz-title { font-weight: 600; }
.dz-subtitle { color: var(--muted); font-size: 14px; }
.dz-actions { display: flex; gap: 10px; align-items: center; justify-content: center; }

.btn { background: #1f2937; color: var(--text); border: 1px solid var(--border); border-radius: 8px; padding: 10px 14px; cursor: pointer; }
.btn.primary { background: var(--primary); border-color: var(--primary-600); }
.btn.primary:disabled { opacity: .5; cursor: not-allowed; }
.btn.secondary { background: #0b1220; }
.btn.danger { background: var(--danger); border-color: #b91c1c; }
.link { background: transparent; color: var(--primary); border: none; padding: 0; cursor: pointer; }

.preview { margin-top: 16px; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.preview-meta { display: flex; gap: 8px; padding: 8px 12px; border-bottom: 1px solid var(--border); color: var(--muted); font-size: 14px; }
.preview img { display: block; max-width: 100%; height: auto; background: #0b1220; }
.preview-actions { padding: 10px; display: flex; justify-content: flex-end; }

.controls { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
select { background: #0b1220; color: var(--text); border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; }

.actions { display: flex; gap: 10px; margin-bottom: 12px; }

.progress { position: relative; height: 14px; background: #0b1220; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; margin-bottom: 12px; }
.progress-bar { height: 100%; background: linear-gradient(90deg, var(--primary), #22d3ee); transition: width .2s ease; }
.progress-text { margin-top: 8px; font-size: 14px; color: var(--muted); }

.result { display: grid; gap: 10px; }
.result textarea { width: 100%; min-height: 300px; background: #0b1220; color: var(--text); border: 1px solid var(--border); border-radius: 10px; padding: 12px; resize: vertical; }
.result-actions { display: flex; gap: 10px; }

.page-footer { text-align: center; margin-top: 20px; color: var(--muted); }

/* SEO Content Section */
.seo-content {
  max-width: 800px;
  margin: 40px auto 0;
  padding: 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  line-height: 1.7;
}

.seo-content h2 {
  font-size: 24px;
  margin: 0 0 16px;
  color: var(--text);
}

.seo-content h3 {
  font-size: 20px;
  margin: 24px 0 12px;
  color: var(--text);
}

.seo-content p {
  margin: 0 0 16px;
  color: var(--muted);
}

.seo-content ul, .seo-content ol {
  margin: 0 0 16px;
  padding-left: 24px;
  color: var(--muted);
}

.seo-content li {
  margin-bottom: 8px;
}

.seo-content strong {
  color: var(--text);
  font-weight: 600;
}