:root {
  --primary: #A78BFA;
  --primary-dim: rgba(167,139,250,0.12);
  --secondary: #C4B5FD;
  --accent: #22D3EE;
  --accent-dim: rgba(34,211,238,0.12);
  --bg: #0E0F1A;
  --bg-input: rgba(8,8,18,0.9);
  --border: rgba(167,139,250,0.1);
  --border-hover: rgba(167,139,250,0.2);
  --text: #E2E8F0;
  --text-dim: #94A3B8;
  --text-muted: #64748B;
  --radius: 12px;
  --radius-sm: 8px;
  --font: 'Inter', system-ui, sans-serif;
  --mono: 'JetBrains Mono', monospace;
  --transition: 250ms ease;
  --glass: rgba(14,15,26,0.65);
  --glass-border: rgba(167,139,250,0.08);
  --ltr-color: #22D3EE;
  --rtl-color: #F472B6;
  --neutral-color: #64748B;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font); background: var(--bg); color: var(--text);
  min-height: 100vh; line-height: 1.6;
  background-image:
    radial-gradient(ellipse at 20% 10%, rgba(167,139,250,0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 90%, rgba(34,211,238,0.03) 0%, transparent 50%);
}
.app { max-width: 1200px; margin: 0 auto; padding: 0 24px; display: flex; flex-direction: column; min-height: 100vh; }

.header { padding: 16px 0; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.header-left { display: flex; align-items: center; gap: 12px; }
.logo { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; }
.header h1 { font-size: 1.2rem; font-weight: 700; background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.header-right { display: flex; gap: 6px; }

.btn { display: inline-flex; align-items: center; gap: 6px; padding: 10px 18px; border-radius: var(--radius-sm); border: none; font-family: var(--font); font-size: 0.85rem; font-weight: 600; cursor: pointer; transition: all var(--transition); white-space: nowrap; }
.btn-primary { background: var(--primary); color: #0E0F1A; }
.btn-primary:hover { background: #9061F9; transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--text-dim); border: 1px solid var(--border); }
.btn-ghost:hover { color: var(--text); background: var(--primary-dim); }
.btn-sm { padding: 6px 12px; font-size: 0.78rem; }

.main { flex: 1; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; padding: 16px 0; align-items: start; }

.panel { background: var(--glass); backdrop-filter: blur(12px); border: 1px solid var(--glass-border); border-radius: var(--radius); display: flex; flex-direction: column; overflow: hidden; animation: fadeIn 0.3s ease; }
.panel-header { padding: 12px 16px; border-bottom: 1px solid var(--border); }
.panel-header h2 { font-size: 0.88rem; font-weight: 600; }
.panel-body { padding: 16px; flex: 1; }

.input { width: 100%; padding: 8px 12px; background: var(--bg-input); border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--text); font-family: var(--font); font-size: 0.82rem; outline: none; transition: all var(--transition); }
.input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-dim); }
.text-input { min-height: 80px; font-family: var(--mono); font-size: 0.88rem; resize: vertical; }
.section-title { font-size: 0.78rem; font-weight: 600; color: var(--text-dim); margin-bottom: 8px; }
.empty-msg { font-size: 0.78rem; color: var(--text-muted); }

/* Override Buttons */
.override-row { display: flex; gap: 6px; }
.override-btn { padding: 6px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: transparent; color: var(--text-dim); font-family: var(--font); font-size: 0.78rem; font-weight: 600; cursor: pointer; transition: all var(--transition); }
.override-btn.active { background: var(--primary-dim); color: var(--primary); border-color: var(--primary); }
.override-btn:hover { color: var(--text); }

/* Controls Row */
.controls-row { display: flex; gap: 4px; flex-wrap: wrap; }

/* Character Grid */
.char-grid { display: flex; flex-wrap: wrap; gap: 3px; max-height: 250px; overflow-y: auto; }
.char-cell { display: flex; flex-direction: column; align-items: center; padding: 4px 6px; border-radius: 4px; font-family: var(--mono); font-size: 0.82rem; min-width: 28px; text-align: center; transition: all var(--transition); cursor: default; }
.char-cell .char-display { font-size: 1rem; line-height: 1.2; }
.char-cell .dir-indicator { font-size: 0.58rem; font-weight: 700; margin-top: 2px; }
.char-cell.ltr { background: rgba(34,211,238,0.08); border: 1px solid rgba(34,211,238,0.15); }
.char-cell.ltr .dir-indicator { color: var(--ltr-color); }
.char-cell.rtl { background: rgba(244,114,182,0.08); border: 1px solid rgba(244,114,182,0.15); }
.char-cell.rtl .dir-indicator { color: var(--rtl-color); }
.char-cell.neutral { background: rgba(100,116,139,0.08); border: 1px solid rgba(100,116,139,0.15); }
.char-cell.neutral .dir-indicator { color: var(--neutral-color); }
.char-cell.control { background: rgba(167,139,250,0.1); border: 1px solid rgba(167,139,250,0.2); }
.char-cell.control .dir-indicator { color: var(--primary); }

/* Render Box */
.render-box { background: var(--bg-input); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 14px; font-family: var(--mono); font-size: 1rem; line-height: 1.8; min-height: 50px; }

/* Stats */
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.stat-card { padding: 10px; background: var(--bg-input); border: 1px solid var(--border); border-radius: var(--radius-sm); text-align: center; }
.stat-value { display: block; font-size: 1.3rem; font-weight: 700; background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.stat-label { font-size: 0.68rem; color: var(--text-dim); }

.footer { padding: 16px 0; text-align: center; font-size: 0.72rem; color: var(--text-muted); border-top: 1px solid var(--border); margin-top: auto; }

.hidden { display: none !important; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 3px; }
@media (max-width: 800px) { .main { grid-template-columns: 1fr; } .stats-row { grid-template-columns: repeat(2, 1fr); } }