:root {
  --bg: radial-gradient(1200px 800px at 10% 10%, rgba(99, 102, 241, 0.25), transparent 40%),
        radial-gradient(1200px 800px at 90% 20%, rgba(16, 185, 129, 0.25), transparent 40%),
        radial-gradient(1200px 800px at 20% 90%, rgba(236, 72, 153, 0.25), transparent 45%),
        #0b0e14;
  --card: rgba(20, 24, 33, 0.7);
  --text: #e6e7eb;
  --muted: #a9afc3;
  --glow-1: 0 0 18px rgba(99, 102, 241, 0.55);
  --glow-2: 0 0 26px rgba(236, 72, 153, 0.45);
  --glow-3: 0 0 40px rgba(16, 185, 129, 0.35);
  --border: rgba(255, 255, 255, 0.12);
  --accent: #8b5cf6;
  --warning: #f59e0b;
  --danger: #ef4444;
  --success: #10b981;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  color: var(--text);
  background: var(--bg);
  background-attachment: fixed;
}

.app {
  max-width: 1100px;
  margin: 24px auto;
  padding: 16px;
}

.header {
  padding: 16px 20px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
  box-shadow: var(--glow-1), var(--glow-2);
}

.header h1 {
  margin: 0 0 6px 0;
  font-weight: 800;
  letter-spacing: 0.4px;
  text-shadow: 0 0 12px rgba(139, 92, 246, 0.5);
}

.header .by { font-weight: 600; opacity: 0.9; }
.header .tagline { margin: 4px 0 0 0; color: var(--muted); }

.controls {
  margin-top: 14px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card);
  backdrop-filter: blur(8px);
  box-shadow: var(--glow-3);
}

.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin: 8px 0; }
label { color: var(--muted); }

.btn {
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(139,92,246,0.18), rgba(139,92,246,0.08));
  color: var(--text);
  padding: 10px 14px;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 600;
  box-shadow: var(--glow-1);
}
.btn:hover { filter: brightness(1.08); }
.btn.secondary { background: linear-gradient(180deg, rgba(59,130,246,0.18), rgba(59,130,246,0.08)); }
.btn.danger { background: linear-gradient(180deg, rgba(239,68,68,0.22), rgba(239,68,68,0.10)); }
.btn.success { background: linear-gradient(180deg, rgba(16,185,129,0.22), rgba(16,185,129,0.10)); }
.btn.ghost { background: linear-gradient(180deg, rgba(255,255,255,0.09), rgba(255,255,255,0.05)); }

.banner {
  margin-top: 4px;
  padding: 8px 12px;
  border-radius: 10px;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.28);
  color: #fde68a;
}
.hidden { display: none; }

.panes {
  margin-top: 14px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.pane {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 10px;
  background: var(--card);
  box-shadow: var(--glow-2);
  min-height: 360px;
  display: flex;
  flex-direction: column;
}
.pane h3 { margin: 6px 0 8px 6px; color: var(--muted); }
textarea {
  width: 100%;
  flex: 1;
  resize: vertical;
  background: rgba(6, 8, 12, 0.6);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  padding: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, Liberation Mono, monospace;
  font-size: 13px;
  line-height: 1.45;
  box-shadow: inset 0 0 20px rgba(139, 92, 246, 0.2);
}

.meta {
  margin-top: 14px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.meta > div {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 10px;
  background: var(--card);
}
#commentsList { margin: 0; padding-left: 18px; max-height: 180px; overflow: auto; }
#summary { margin: 0; white-space: pre-wrap; color: var(--muted); }

.footer { margin-top: 16px; text-align: center; color: var(--muted); }