:root {
  --bg: #12101d;
  --panel: rgba(255,255,255,0.06);
  --panel-solid: #1c1930;
  --border: rgba(255,255,255,0.12);
  --text: #f4f1ff;
  --muted: #a99fd0;
  --accent: #ff6b9d;
  --accent2: #6bd6ff;
  --radius: 16px;
  font-family: 'Vazirmatn', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  font-family: 'Vazirmatn', sans-serif;
  overflow-x: hidden;
  position: relative;
}

/* Animated background blobs */
.bg-blobs { position: fixed; inset: 0; z-index: -1; overflow: hidden; }
.bg-blobs span {
  position: absolute; border-radius: 50%;
  filter: blur(90px); opacity: 0.35;
  animation: float 18s ease-in-out infinite;
}
.bg-blobs span:nth-child(1){ width:420px;height:420px;background:#ff6b9d;top:-80px;right:-60px;}
.bg-blobs span:nth-child(2){ width:380px;height:380px;background:#6bd6ff;bottom:-100px;left:-80px;animation-delay:-6s;}
.bg-blobs span:nth-child(3){ width:300px;height:300px;background:#b06bff;top:40%;left:40%;animation-delay:-12s;}
@keyframes float { 0%,100%{transform:translate(0,0) scale(1);} 50%{transform:translate(30px,-40px) scale(1.15);} }

/* Header */
.app-header {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap;
  padding: 22px 28px;
  background: linear-gradient(90deg, rgba(255,107,157,0.15), rgba(107,214,255,0.12));
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.title-wrap h1 { font-size: 1.7rem; font-weight: 900; letter-spacing: -0.5px; }
.subtitle { color: var(--muted); font-size: 0.9rem; margin-top: 4px; font-weight: 100; }
.res-badge {
  background: rgba(0,0,0,0.35);
  border: 1px solid var(--border);
  padding: 8px 16px; border-radius: 999px;
  font-size: 0.85rem; font-weight: 700;
  color: var(--accent2);
  white-space: nowrap;
}

/* Layout */
.layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 22px;
  padding: 24px 28px 40px;
  max-width: 1400px; margin: 0 auto;
}
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
}

/* Preview */
.preview-pane { display: flex; flex-direction: column; gap: 18px; }
.preview-frame {
  background:
    repeating-conic-gradient(#2a2740 0% 25%, #201d33 0% 50%) 50% / 32px 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex; align-items: center; justify-content: center;
  min-height: 360px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}
canvas {
  border-radius: 8px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.5);
  max-width: 100%;
}

/* Action bar */
.action-bar { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  flex: 1; min-width: 100px;
  padding: 14px 18px; border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-family: inherit; font-weight: 700; font-size: 1rem;
  cursor: pointer; transition: transform 0.12s, background 0.2s, box-shadow 0.2s;
}
.btn:hover { transform: translateY(-2px); background: rgba(255,255,255,0.12); }
.btn:active { transform: translateY(0); }
.btn.primary {
  background: linear-gradient(135deg, var(--accent), #ff9a6b);
  border: none; color: #1a0f1a;
  box-shadow: 0 8px 24px rgba(255,107,157,0.4);
}
.btn.ghost { flex: 0 0 auto; }

/* Controls */
.controls {
  background: var(--panel);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex; flex-direction: column; gap: 16px;
  align-self: start;
  max-height: calc(100vh - 60px);
  overflow-y: auto;
}
.controls::-webkit-scrollbar { width: 8px; }
.controls::-webkit-scrollbar-thumb { background: var(--border); border-radius: 8px; }

.ctrl-group { display: flex; flex-direction: column; gap: 8px; }
.ctrl-label { font-weight: 700; font-size: 0.95rem; }
textarea {
  width: 100%; resize: vertical;
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  padding: 14px;
  font-family: 'Vazirmatn', sans-serif;
  font-size: 1.05rem; line-height: 1.7;
}
textarea:focus { outline: none; border-color: var(--accent); }
.char-count { font-size: 0.8rem; color: var(--muted); }

/* Section (details) */
.section {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 6px 14px;
  background: rgba(0,0,0,0.15);
}
.section summary {
  cursor: pointer; font-weight: 700; padding: 8px 0;
  list-style: none; user-select: none;
  display: flex; align-items: center; gap: 6px;
}
.section summary::-webkit-details-marker { display: none; }
.section[open] summary { border-bottom: 1px solid var(--border); margin-bottom: 10px; }

.row {
  display: flex; align-items: center; justify-content: space-between;
  gap: 10px; padding: 8px 0;
}
.row label { font-size: 0.9rem; color: var(--muted); flex: 1; }
.slider-row { flex-direction: column; align-items: stretch; }
.slider-row label { display: flex; justify-content: space-between; margin-bottom: 6px; color: var(--text); }
.val { color: var(--accent2); font-weight: 700; }

select, input[type="range"], input[type="color"] {
  font-family: inherit;
}
select {
  background: rgba(0,0,0,0.4);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 0.9rem;
  min-width: 150px;
}
input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 6px; border-radius: 6px;
  background: rgba(255,255,255,0.15);
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 20px; height: 20px;
  border-radius: 50%; background: var(--accent);
  cursor: pointer; box-shadow: 0 2px 8px rgba(0,0,0,0.5);
}
input[type="range"]::-moz-range-thumb {
  width: 20px; height: 20px; border: none; border-radius: 50%;
  background: var(--accent); cursor: pointer;
}
input[type="color"] {
  width: 52px; height: 36px; border: 1px solid var(--border);
  border-radius: 8px; background: transparent; cursor: pointer; padding: 2px;
}
input.switch {
  width: 46px; height: 26px; appearance: none; -webkit-appearance: none;
  background: rgba(255,255,255,0.2); border-radius: 999px; position: relative;
  cursor: pointer; transition: background 0.2s;
}
input.switch:checked { background: var(--accent); }
input.switch::before {
  content: ''; position: absolute; top: 3px; right: 3px;
  width: 20px; height: 20px; border-radius: 50%; background: #fff;
  transition: transform 0.2s;
}
input.switch:checked::before { transform: translateX(-20px); }

/* Toggle groups */
.btn-toggle { display: flex; gap: 4px; background: rgba(0,0,0,0.35); border-radius: 8px; padding: 3px; }
.btn-toggle button {
  border: none; background: transparent; color: var(--muted);
  padding: 7px 12px; border-radius: 6px; cursor: pointer;
  font-family: inherit; font-size: 0.82rem; font-weight: 700;
  transition: all 0.15s; white-space: nowrap;
}
.btn-toggle button.active { background: var(--accent); color: #1a0f1a; }

/* Presets */
.presets { display: flex; flex-wrap: wrap; gap: 8px; padding-top: 6px; }
.preset-chip {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  font-family: inherit; font-weight: 700; font-size: 0.85rem;
  cursor: pointer; transition: transform 0.12s;
  flex: 1 1 45%;
}
.preset-chip:hover { transform: translateY(-2px) scale(1.02); }

/* Footer */
.app-footer {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
  padding: 20px 28px;
  border-top: 1px solid var(--border);
  color: var(--muted); font-size: 0.85rem;
}
.app-footer a {
  color: var(--accent2); text-decoration: none; font-weight: 700;
  border: 1px solid var(--border); padding: 6px 14px; border-radius: 999px;
  transition: background 0.2s;
}
.app-footer a:hover { background: rgba(107,214,255,0.15); }

/* Toast */
.toast {
  position: fixed; bottom: 30px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: linear-gradient(135deg, var(--accent), #ff9a6b);
  color: #1a0f1a; padding: 14px 24px; border-radius: 999px;
  font-weight: 700; box-shadow: 0 12px 40px rgba(0,0,0,0.5);
  opacity: 0; pointer-events: none; transition: all 0.3s; z-index: 100;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

.hidden { display: none !important; }