*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#0a0e1a;--sf:#131828;--sf2:#1c2340;--sf3:#252d4a;
  --tx:#e8ecf4;--tx2:#7b8ab8;--tx3:#4a5580;
  --ac:#6366f1;--ac2:#8b5cf6;--ac3:#a78bfa;
  --bd:#2a3358;--bd2:#1e2544;
  --r:14px;--r2:10px;
  --sh:0 4px 32px rgba(0,0,0,.4);
  --glow:0 0 20px rgba(99,102,241,.15);
  --transition:.25s cubic-bezier(.4,0,.2,1);
}
[data-theme="light"]{
  --bg:#f0f2f8;--sf:#fff;--sf2:#e8ecf4;--sf3:#d5dae8;
  --tx:#0f172a;--tx2:#64748b;--tx3:#94a3b8;
  --bd:#d0d5e0;--bd2:#e2e6f0;
  --sh:0 4px 24px rgba(0,0,0,.06);--glow:none;
}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','Inter',sans-serif;background:var(--bg);color:var(--tx);min-height:100vh;overflow-x:hidden}
::selection{background:var(--ac);color:#fff}
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--bd);border-radius:3px}

/* Layout */
.app-container{max-width:1440px;margin:0 auto;padding:20px 24px}
header{display:flex;justify-content:space-between;align-items:center;padding:12px 0 20px;gap:12px;flex-wrap:wrap}
h1{font-size:1.6rem;font-weight:800;background:linear-gradient(135deg,var(--ac),var(--ac2),#ec4899);-webkit-background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-.02em}
.header-actions{display:flex;gap:8px;align-items:center}
.header-actions button,.header-actions select{
  background:var(--sf);border:1px solid var(--bd);color:var(--tx);
  padding:6px 14px;border-radius:8px;cursor:pointer;font-size:.82rem;
  transition:var(--transition)
}
.header-actions button:hover,.header-actions select:hover{background:var(--sf2);border-color:var(--ac)}

.main-grid{display:grid;grid-template-columns:1fr 380px;gap:24px}
@media(max-width:960px){.main-grid{grid-template-columns:1fr}}

/* Panels */
.panel{background:var(--sf);border:1px solid var(--bd2);border-radius:var(--r);padding:20px;box-shadow:var(--sh);transition:var(--transition)}
.panel:hover{box-shadow:var(--sh),var(--glow)}
.panel+.panel{margin-top:20px}
.panel-title{font-size:.82rem;font-weight:700;color:var(--tx2);margin-bottom:14px;display:flex;justify-content:space-between;align-items:center;text-transform:uppercase;letter-spacing:.06em}

/* Type Tabs */
.type-tabs{display:flex;gap:4px;margin-bottom:16px;background:var(--sf2);padding:4px;border-radius:var(--r2)}
.type-tabs button{
  flex:1;padding:10px;border:none;background:transparent;color:var(--tx2);
  border-radius:8px;cursor:pointer;font-weight:700;font-size:.82rem;
  transition:var(--transition);position:relative
}
.type-tabs button.active{background:var(--ac);color:#fff;box-shadow:0 2px 12px rgba(99,102,241,.4)}
.type-tabs button:not(.active):hover{color:var(--tx);background:var(--sf3)}

/* Preview */
.preview-container{width:100%;aspect-ratio:16/10;border-radius:var(--r);position:relative;overflow:hidden;cursor:crosshair;border:1px solid var(--bd);transition:var(--transition)}
.preview-content{width:100%;height:100%;display:flex;align-items:center;justify-content:center;position:relative}
.preview-text{font-size:2.4rem;font-weight:900;color:#fff;text-shadow:0 2px 8px rgba(0,0,0,.4);letter-spacing:-.02em;text-align:center;padding:20px}
.preview-card{background:rgba(255,255,255,.15);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);padding:28px;border-radius:16px;border:1px solid rgba(255,255,255,.2);color:#fff;box-shadow:0 8px 32px rgba(0,0,0,.2);max-width:320px}
.preview-card h3{font-size:1.2rem;margin-bottom:8px}
.preview-card p{font-size:.9rem;opacity:.85;line-height:1.5}
.preview-card .card-btn{display:inline-block;margin-top:12px;padding:8px 20px;background:rgba(255,255,255,.25);border-radius:8px;font-size:.82rem;font-weight:600}
.center-marker{position:absolute;width:16px;height:16px;border:2px solid #fff;border-radius:50%;transform:translate(-50%,-50%);pointer-events:none;box-shadow:0 0 0 2px rgba(0,0,0,.3),inset 0 0 0 2px rgba(0,0,0,.3);z-index:5}
.center-dragger{position:absolute;width:28px;height:28px;border-radius:50%;transform:translate(-50%,-50%);cursor:grab;z-index:10;opacity:0}
.center-dragger:active{cursor:grabbing}
.fullscreen-btn{position:absolute;top:10px;right:10px;background:rgba(0,0,0,.4);color:#fff;border:none;padding:6px 10px;border-radius:8px;cursor:pointer;font-size:.8rem;z-index:5;backdrop-filter:blur(4px);transition:var(--transition)}
.fullscreen-btn:hover{background:rgba(0,0,0,.6)}

.preview-modes{display:flex;gap:4px;margin-top:12px;background:var(--sf2);padding:3px;border-radius:8px}
.preview-modes button{
  padding:6px 14px;border:none;background:transparent;color:var(--tx2);
  border-radius:6px;cursor:pointer;font-size:.75rem;font-weight:600;transition:var(--transition)
}
.preview-modes button.active{background:var(--ac);color:#fff}

/* Animation preview */
.anim-section{margin-top:14px}
.anim-bar{height:48px;border-radius:var(--r2);overflow:hidden;border:1px solid var(--bd)}
.anim-bar-inner{width:300%;height:100%;background-size:300% 100%;animation:animShift 4s ease-in-out infinite}
@keyframes animShift{0%{background-position:0% 50%}50%{background-position:100% 50%}100%{background-position:0% 50%}}

/* Controls */
.ctrl-section{display:flex;flex-direction:column;gap:14px}
.ctrl-group{display:flex;flex-direction:column;gap:6px}
.ctrl-label{font-size:.78rem;color:var(--tx2);font-weight:700;display:flex;align-items:center;gap:6px}

/* Angle Dial */
.angle-dial-wrap{display:flex;align-items:center;gap:16px}
.angle-dial{width:130px;height:130px;position:relative;flex-shrink:0}
.angle-dial svg{width:100%;height:100%}
.dial-knob{position:absolute;width:18px;height:18px;background:var(--ac);border:3px solid #fff;border-radius:50%;transform:translate(-50%,-50%);cursor:grab;box-shadow:0 2px 8px rgba(0,0,0,.3);z-index:2;transition:box-shadow .15s}
.dial-knob:hover{box-shadow:0 2px 16px rgba(99,102,241,.5)}
.dial-knob:active{cursor:grabbing}
.angle-input-group{display:flex;flex-direction:column;gap:8px;flex:1}
.angle-input-group input[type="range"]{width:100%;accent-color:var(--ac);height:6px}
.angle-value{font-size:1.8rem;font-weight:800;color:var(--tx);text-align:center}
.angle-value span{font-size:1rem;color:var(--tx2)}

/* Select */
.ctrl-select{width:100%;padding:10px 12px;background:var(--sf2);border:1px solid var(--bd);color:var(--tx);border-radius:var(--r2);font-size:.85rem;cursor:pointer;transition:var(--transition)}
.ctrl-select:hover{border-color:var(--ac)}

/* Checkbox */
.ctrl-checkbox{display:flex;align-items:center;gap:8px;cursor:pointer;font-size:.82rem;color:var(--tx2)}
.ctrl-checkbox input{accent-color:var(--ac);width:16px;height:16px}

/* Stops Track */
.stops-track{height:36px;border-radius:var(--r2);position:relative;margin:10px 0;border:1px solid var(--bd);cursor:pointer;overflow:visible}
.stops-track-bg{width:100%;height:100%;border-radius:inherit}
.stop-marker{
  position:absolute;top:50%;width:22px;height:22px;border-radius:50%;
  border:3px solid #fff;cursor:grab;transform:translate(-50%,-50%);
  box-shadow:0 2px 10px rgba(0,0,0,.4);transition:transform .1s,box-shadow .15s;z-index:2
}
.stop-marker:hover{transform:translate(-50%,-50%) scale(1.15);box-shadow:0 2px 16px rgba(0,0,0,.5)}
.stop-marker.selected{transform:translate(-50%,-50%) scale(1.25);border-color:var(--ac);box-shadow:0 0 0 3px rgba(99,102,241,.3),0 2px 10px rgba(0,0,0,.4)}
.stop-marker:active{cursor:grabbing}

.stops-editor{display:flex;flex-direction:column;gap:6px;margin-top:10px}
.stop-row{display:flex;align-items:center;gap:8px;padding:8px 10px;background:var(--sf2);border-radius:var(--r2);border:1px solid transparent;transition:var(--transition)}
.stop-row.selected{border-color:var(--ac);background:var(--sf3)}
.stop-row input[type="color"]{width:36px;height:36px;border:none;border-radius:8px;cursor:pointer;background:none;padding:0}
.stop-row input[type="color"]::-webkit-color-swatch-wrapper{padding:2px}
.stop-row input[type="color"]::-webkit-color-swatch{border-radius:6px;border:1px solid var(--bd)}
.stop-color-hex{width:80px;padding:6px 8px;background:var(--bg);border:1px solid var(--bd);color:var(--tx);border-radius:6px;font-family:monospace;font-size:.8rem;text-align:center}
.stop-pos{width:56px;padding:6px 8px;background:var(--bg);border:1px solid var(--bd);color:var(--tx);border-radius:6px;font-size:.8rem;text-align:center}
.stop-remove{background:none;border:none;color:#ef4444;cursor:pointer;font-size:1.1rem;padding:4px 6px;border-radius:6px;transition:var(--transition)}
.stop-remove:hover{background:rgba(239,68,68,.15)}

/* Buttons */
.btn{padding:10px 18px;border:none;border-radius:var(--r2);cursor:pointer;font-weight:700;font-size:.82rem;transition:var(--transition);display:inline-flex;align-items:center;gap:6px}
.btn-primary{background:linear-gradient(135deg,var(--ac),var(--ac2));color:#fff;box-shadow:0 2px 12px rgba(99,102,241,.3)}
.btn-primary:hover{opacity:.9;transform:translateY(-1px);box-shadow:0 4px 20px rgba(99,102,241,.4)}
.btn-secondary{background:var(--sf2);color:var(--tx);border:1px solid var(--bd)}
.btn-secondary:hover{border-color:var(--ac);background:var(--sf3)}
.btn-small{padding:6px 12px;font-size:.75rem}
.btn-row{display:flex;gap:8px;flex-wrap:wrap}
.btn-icon{background:none;border:1px solid var(--bd);color:var(--tx2);padding:6px 10px;border-radius:8px;cursor:pointer;font-size:.82rem;transition:var(--transition)}
.btn-icon:hover{border-color:var(--ac);color:var(--ac)}

/* Code Box */
.code-block{background:#080c18;border:1px solid var(--bd2);border-radius:var(--r2);padding:14px 16px;padding-right:70px;font-family:'SF Mono','Fira Code',Consolas,monospace;font-size:.78rem;color:#a5f3fc;overflow-x:auto;white-space:pre-wrap;line-height:1.7;position:relative;word-break:break-all}
.code-block .copy-btn{position:absolute;top:8px;right:8px;background:var(--ac);color:#fff;border:none;padding:5px 12px;border-radius:6px;cursor:pointer;font-size:.72rem;font-weight:600;transition:var(--transition)}
.code-block .copy-btn:hover{opacity:.85}
.export-row{display:flex;gap:8px;margin-top:14px}

/* Presets */
.presets-grid{margin-top:10px}
.preset-category{margin-bottom:16px}
.preset-cat-title{font-size:.72rem;color:var(--tx3);font-weight:700;text-transform:uppercase;letter-spacing:.08em;margin-bottom:8px;padding-left:2px}
.preset-items{display:grid;grid-template-columns:repeat(auto-fill,minmax(52px,1fr));gap:6px}
.preset-swatch{
  aspect-ratio:1;border-radius:10px;cursor:pointer;border:2px solid transparent;
  transition:var(--transition);position:relative;overflow:hidden
}
.preset-swatch:hover{border-color:var(--ac);transform:scale(1.08)}
.preset-swatch:active{transform:scale(.95)}

/* Favorites & History */
.favorites-grid,.history-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(72px,1fr));gap:8px;margin-top:10px}
.fav-item,.hist-item{
  aspect-ratio:1.4;border-radius:var(--r2);cursor:pointer;border:2px solid transparent;
  transition:var(--transition);position:relative;overflow:hidden
}
.fav-item:hover,.hist-item:hover{border-color:var(--ac);transform:scale(1.05)}
.fav-item .fav-remove,.hist-item .hist-remove{
  position:absolute;top:3px;right:3px;background:rgba(0,0,0,.6);color:#fff;border:none;
  width:18px;height:18px;border-radius:50%;cursor:pointer;font-size:.65rem;
  display:none;align-items:center;justify-content:center;line-height:1
}
.fav-item:hover .fav-remove,.hist-item:hover .hist-remove{display:flex}

/* Donate */
.donate-section{text-align:center;padding:20px;background:var(--sf);border:1px solid var(--bd2);border-radius:var(--r);max-width:360px;margin:28px auto}
.donate-section p{color:var(--tx2);font-size:.85rem;margin-bottom:10px}
.donate-images{display:flex;gap:12px;justify-content:center;align-items:center;flex-wrap:wrap}
.donate-images img{max-width:120px;border-radius:10px;border:1px solid var(--bd)}

/* Footer */
footer{text-align:center;padding:24px 0 12px;color:var(--tx3);font-size:.75rem}

/* SEO section */
.seo-section{max-width:800px;margin:28px auto 0;color:var(--tx2);font-size:.82rem;line-height:1.8}
.seo-section h2{color:var(--tx);font-size:1.1rem;margin-bottom:8px;font-weight:700}
.seo-section ul{padding-left:1.5rem;margin:8px 0}

/* Toast */
.toast{position:fixed;top:20px;left:50%;transform:translateX(-50%) translateY(-20px);background:linear-gradient(135deg,var(--ac),var(--ac2));color:#fff;padding:10px 24px;border-radius:var(--r2);font-weight:700;font-size:.85rem;opacity:0;transition:all .3s;pointer-events:none;z-index:9999;box-shadow:0 4px 20px rgba(99,102,241,.4)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* Fullscreen */
.fullscreen-overlay{position:fixed;inset:0;z-index:9990;display:none;cursor:pointer}
.fullscreen-overlay.show{display:block}
.fullscreen-close{position:fixed;top:20px;right:20px;z-index:9991;background:rgba(0,0,0,.5);color:#fff;width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.2rem;cursor:pointer;backdrop-filter:blur(4px)}

/* Tabs for presets/favorites/history */
.tab-bar{display:flex;gap:2px;background:var(--sf2);padding:3px;border-radius:8px;margin-bottom:14px}
.tab-bar button{flex:1;padding:7px;border:none;background:transparent;color:var(--tx2);border-radius:6px;cursor:pointer;font-size:.75rem;font-weight:700;transition:var(--transition)}
.tab-bar button.active{background:var(--ac);color:#fff}

/* Responsive */
@media(max-width:960px){
  .app-container{padding:12px 14px}
  .main-grid{gap:16px}
  h1{font-size:1.3rem}
  .angle-dial{width:100px;height:100px}
}