:root {
  --bg: #0d0b1a;
  --bg2: #161328;
  --card: rgba(255,255,255,0.05);
  --card-border: rgba(255,255,255,0.09);
  --accent: #ec4899;
  --accent2: #7c3aed;
  --text: #f4f2fb;
  --muted: #a29fc0;
  --radius: 16px;
  font-family: 'Vazirmatn', sans-serif;
}

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

body {
  background:
    radial-gradient(circle at 15% 10%, rgba(124,58,237,0.28), transparent 45%),
    radial-gradient(circle at 85% 90%, rgba(236,72,153,0.22), transparent 45%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  font-family: 'Vazirmatn', sans-serif;
  -webkit-font-smoothing: antialiased;
}

#app { max-width: 1250px; margin: 0 auto; padding: 20px 18px 40px; }

/* Header */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; margin-bottom: 22px; flex-wrap: wrap;
  animation: drop 0.6s cubic-bezier(.2,.9,.3,1);
}
.topbar h1 {
  font-size: clamp(1.4rem, 4vw, 2.3rem);
  font-weight: 900;
  background: linear-gradient(120deg, #fff, #ec4899, #a78bfa);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.subtitle { color: var(--muted); margin-top: 6px; font-size: 0.9rem; font-weight: 400; }
.badge {
  background: linear-gradient(120deg, var(--accent2), var(--accent));
  padding: 8px 16px; border-radius: 999px; font-weight: 700;
  font-size: 0.85rem; white-space: nowrap;
  box-shadow: 0 6px 20px rgba(236,72,153,0.35);
}

/* Layout */
.layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 22px;
  align-items: start;
}
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .controls-panel { order: 1; }
  .preview-panel { order: 2; position: static !important; }
}

/* Preview */
.preview-panel {
  position: sticky; top: 20px;
  animation: fade 0.7s ease 0.1s both;
}
.preview-frame {
  background-image:
    linear-gradient(45deg, #2a2740 25%, transparent 25%),
    linear-gradient(-45deg, #2a2740 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #2a2740 75%),
    linear-gradient(-45deg, transparent 75%, #2a2740 75%);
  background-size: 24px 24px;
  background-position: 0 0, 0 12px, 12px -12px, -12px 0;
  background-color: #201d33;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 14px;
  display: flex; align-items: center; justify-content: center;
  min-height: 240px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.4);
}
#preview {
  border-radius: 6px;
  max-width: 100%;
  box-shadow: 0 8px 30px rgba(0,0,0,0.5);
  display: block;
}
.dims {
  text-align: center; color: var(--muted); margin: 12px 0 14px;
  font-size: 0.85rem; font-variant-numeric: tabular-nums;
}
.actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }

.btn {
  border: none; cursor: pointer; border-radius: 12px;
  padding: 12px 18px; font-family: inherit; font-weight: 700;
  font-size: 0.9rem; transition: transform .12s, box-shadow .2s, background .2s;
  color: var(--text);
}
.btn:active { transform: scale(0.96); }
.btn.primary {
  background: linear-gradient(120deg, var(--accent2), var(--accent));
  box-shadow: 0 8px 24px rgba(236,72,153,0.4);
  flex: 1; min-width: 180px;
}
.btn.primary:hover { box-shadow: 0 10px 30px rgba(236,72,153,0.6); }
.btn.ghost {
  background: var(--card); border: 1px solid var(--card-border);
}
.btn.ghost:hover { background: rgba(255,255,255,0.1); }

/* Toast */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: rgba(20,17,38,0.95); border: 1px solid var(--accent);
  padding: 12px 22px; border-radius: 999px; font-weight: 700;
  opacity: 0; pointer-events: none; transition: all .3s; z-index: 100;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* Controls */
.controls-panel { display: flex; flex-direction: column; gap: 14px; animation: fade 0.7s ease 0.2s both; }
.card {
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: var(--radius); padding: 16px;
  backdrop-filter: blur(10px);
}
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; align-items: start; }
.lbl {
  display: block; font-size: 0.82rem; font-weight: 700;
  color: var(--muted); margin-bottom: 9px;
}
.val { color: var(--accent); font-variant-numeric: tabular-nums; }

textarea, select {
  width: 100%; background: rgba(0,0,0,0.25); color: var(--text);
  border: 1px solid var(--card-border); border-radius: 10px;
  padding: 11px 13px; font-family: inherit; font-size: 0.95rem;
  resize: vertical;
}
textarea:focus, select:focus { outline: 2px solid var(--accent2); border-color: transparent; }
select { cursor: pointer; }
option { background: var(--bg2); color: var(--text); }

input[type="range"] {
  width: 100%; -webkit-appearance: none; appearance: none;
  height: 6px; border-radius: 999px;
  background: linear-gradient(90deg, var(--accent2), var(--accent));
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 20px; height: 20px; border-radius: 50%;
  background: #fff; box-shadow: 0 2px 8px rgba(0,0,0,0.5); cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
  width: 20px; height: 20px; border-radius: 50%; border: none;
  background: #fff; box-shadow: 0 2px 8px rgba(0,0,0,0.5); cursor: pointer;
}
.mini-range { max-width: 90px; }

input[type="color"] {
  width: 100%; height: 42px; border: 1px solid var(--card-border);
  border-radius: 10px; background: transparent; cursor: pointer; padding: 3px;
}
.mini-color { width: 42px !important; height: 34px; }

/* Segmented buttons */
.seg { display: flex; gap: 6px; }
.seg.wrap { flex-wrap: wrap; }
.seg button {
  flex: 1; min-width: 52px; border: 1px solid var(--card-border);
  background: rgba(0,0,0,0.2); color: var(--muted);
  padding: 9px 6px; border-radius: 10px; cursor: pointer;
  font-family: inherit; font-weight: 700; font-size: 0.82rem;
  transition: all .18s;
}
.seg button:hover { color: var(--text); border-color: var(--accent2); }
.seg button.active {
  background: linear-gradient(120deg, var(--accent2), var(--accent));
  color: #fff; border-color: transparent;
}

/* BG controls */
.bg-controls { margin-top: 12px; }
.row { display: flex; align-items: center; gap: 10px; margin-top: 8px; }
.row.hidden { display: none; }
.mini { font-size: 0.8rem; color: var(--muted); white-space: nowrap; }

.presets { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.preset-chip {
  border: none; cursor: pointer; border-radius: 10px;
  padding: 8px 12px; color: #fff; font-family: inherit;
  font-weight: 700; font-size: 0.78rem;
  text-shadow: 0 1px 3px rgba(0,0,0,0.6);
  transition: transform .12s;
}
.preset-chip:hover { transform: translateY(-2px) scale(1.04); }

.toggle-row { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.chk {
  display: flex; align-items: center; gap: 7px; cursor: pointer;
  font-size: 0.9rem; font-weight: 700;
}
.chk input { width: 18px; height: 18px; accent-color: var(--accent); cursor: pointer; }

/* Footer */
.foot {
  margin-top: 36px; padding-top: 20px;
  border-top: 1px solid var(--card-border);
  display: flex; justify-content: space-between; align-items: center;
  color: var(--muted); font-size: 0.85rem; flex-wrap: wrap; gap: 10px;
}
.foot a {
  color: var(--accent); text-decoration: none; font-weight: 700;
  padding: 6px 14px; border: 1px solid var(--accent);
  border-radius: 999px; transition: all .2s;
}
.foot a:hover { background: var(--accent); color: #fff; }

@keyframes drop { from { opacity: 0; transform: translateY(-16px); } to { opacity: 1; transform: none; } }
@keyframes fade { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }