*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0f1117;--surface:#181b25;--surface2:#1f2333;--border:#2a2f42;
  --text:#e4e6f0;--text-dim:#8b8fa8;--accent:#6C5CE7;--accent2:#a29bfe;
  --green:#00cec9;--red:#ff7675;--yellow:#ffeaa7;
  --radius:10px;--radius-sm:6px;
  --font:system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --mono:'SF Mono',Fira Code,Consolas,monospace;
}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* Header */
.site-header{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;backdrop-filter:blur(8px)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:56px}
.logo{display:flex;align-items:center;gap:8px;color:var(--text);text-decoration:none;font-weight:700;font-size:1.1rem}
.site-nav{display:flex;gap:20px}
.site-nav a{color:var(--text-dim);text-decoration:none;font-size:.9rem;transition:color .2s}
.site-nav a:hover{color:var(--accent2)}

/* Hero */
.hero{padding:60px 0 40px;text-align:center}
.hero h1{font-size:2.4rem;font-weight:800;background:linear-gradient(135deg,var(--accent2),var(--green));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:12px}
.hero-sub{color:var(--text-dim);font-size:1.1rem;max-width:560px;margin:0 auto 24px}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border-radius:var(--radius-sm);font-size:.9rem;font-weight:600;cursor:pointer;border:1px solid transparent;transition:all .2s;text-decoration:none}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:#5a4bd6}
.btn-ghost{background:transparent;color:var(--text-dim);border-color:var(--border)}
.btn-ghost:hover{color:var(--text);border-color:var(--text-dim)}
.btn-sm{padding:6px 14px;font-size:.8rem}

/* Sections */
section{padding:48px 0}
.section-header{margin-bottom:28px}
.section-header h2{font-size:1.5rem;font-weight:700;margin-bottom:6px}
.section-header p{color:var(--text-dim);max-width:600px}

/* Workspace */
.workspace-toolbar{display:flex;align-items:center;gap:10px;margin-bottom:20px;flex-wrap:wrap}
.toolbar-spacer{flex:1}
.toolbar-hint{color:var(--text-dim);font-size:.85rem}

.panels-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}

.curve-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.panel-header{display:flex;align-items:center;gap:8px;padding:12px 16px;border-bottom:1px solid var(--border);background:var(--surface2)}
.panel-label{font-weight:600;font-size:.9rem;flex:1}
.panel-save,.panel-collapse{background:none;border:none;color:var(--text-dim);cursor:pointer;font-size:1.1rem;padding:2px 6px;border-radius:4px;transition:all .2s}
.panel-save:hover,.panel-collapse:hover{color:var(--text);background:var(--border)}
.panel-save.saved{color:var(--yellow)}
.panel-body{padding:16px}
.panel-body.collapsed{display:none}

.bezier-canvas-wrap{display:flex;justify-content:center;margin-bottom:12px}
.bezier-canvas{background:var(--bg);border-radius:var(--radius-sm);cursor:crosshair;touch-action:none}

.panel-fields{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:12px}
.field{display:flex;flex-direction:column;gap:2px}
.field label{font-size:.75rem;color:var(--text-dim);font-weight:500}
.field input[type=range]{width:100%;accent-color:var(--accent)}
.field input[type=number]{background:var(--bg);border:1px solid var(--border);color:var(--text);padding:4px 8px;border-radius:4px;font-size:.85rem;width:100%}
.field-val{font-size:.75rem;color:var(--accent2);text-align:right}

.preview-stage{margin-bottom:12px}
.preview-track{height:36px;background:var(--bg);border-radius:var(--radius-sm);position:relative;overflow:hidden}
.preview-ball{width:20px;height:20px;background:var(--accent);border-radius:50%;position:absolute;left:8px;top:8px;transition:none}
.preview-ball.animating{transition-property:left}

.panel-output{display:flex;align-items:center;gap:8px}
.timing-string{flex:1;font-family:var(--mono);font-size:.75rem;background:var(--bg);padding:6px 10px;border-radius:4px;color:var(--green);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* Presets */
.preset-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}
.preset-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px;cursor:pointer;transition:all .2s}
.preset-card:hover{border-color:var(--accent);transform:translateY(-2px)}
.preset-card h4{font-size:.95rem;margin-bottom:4px}
.preset-card p{font-size:.8rem;color:var(--text-dim);margin-bottom:8px}
.preset-preview{height:30px;background:var(--bg);border-radius:4px;position:relative;overflow:hidden;margin-bottom:8px}
.preset-preview-ball{width:14px;height:14px;background:var(--accent);border-radius:50%;position:absolute;left:4px;top:8px}
.preset-bezier{font-family:var(--mono);font-size:.7rem;color:var(--green)}

.saved-presets{margin-top:32px}
.saved-presets h3{font-size:1.1rem;margin-bottom:12px}
.saved-empty{color:var(--text-dim);font-style:italic}

/* Code */
.code-block-wrap{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.code-block-header{display:flex;align-items:center;justify-content:space-between;padding:10px 16px;background:var(--surface2);border-bottom:1px solid var(--border);font-size:.85rem;color:var(--text-dim)}
.code-block{padding:20px;font-family:var(--mono);font-size:.85rem;line-height:1.7;color:var(--text);overflow-x:auto;white-space:pre;max-height:400px;overflow-y:auto}

/* Reference */
.ref-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.ref-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px}
.ref-card h3{font-size:1rem;margin-bottom:12px;color:var(--accent2)}
.ref-card ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.ref-card li{font-size:.85rem;color:var(--text-dim);padding-left:16px;position:relative}
.ref-card li::before{content:'›';position:absolute;left:0;color:var(--accent);font-weight:700}
.ref-card li strong{color:var(--text)}
.ref-card code{background:var(--bg);padding:1px 5px;border-radius:3px;font-family:var(--mono);font-size:.8rem;color:var(--green)}
.ref-table{width:100%;border-collapse:collapse;font-size:.85rem}
.ref-table th,.ref-table td{padding:8px 12px;text-align:left;border-bottom:1px solid var(--border)}
.ref-table th{color:var(--text-dim);font-weight:600;font-size:.8rem}
.ref-table td{color:var(--text-dim)}
.ref-table td:last-child{color:var(--text)}

/* About */
.about-content{max-width:700px;display:flex;flex-direction:column;gap:14px}
.about-content p{color:var(--text-dim);font-size:.95rem}
.version-note{font-size:.8rem;color:var(--text-dim);margin-top:8px}

/* Footer */
.site-footer{border-top:1px solid var(--border);padding:24px 0;margin-top:40px}
.footer-inner{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.footer-brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:.9rem}
.logo-mark{width:28px;height:28px;background:var(--accent);border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:800}
.footer-nav{display:flex;gap:16px;margin-left:auto}
.footer-nav a{color:var(--text-dim);text-decoration:none;font-size:.85rem}
.footer-nav a:hover{color:var(--text)}
.footer-copy{font-size:.8rem;color:var(--text-dim);width:100%}

/* Toast */
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(80px);background:var(--surface2);color:var(--text);padding:10px 20px;border-radius:var(--radius-sm);border:1px solid var(--border);font-size:.85rem;opacity:0;transition:all .3s;z-index:2000;pointer-events:none}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* Responsive */
@media(max-width:768px){
  .hero h1{font-size:1.7rem}
  .site-nav{display:none}
  .panels-grid{grid-template-columns:1fr}
  .panel-fields{grid-template-columns:1fr 1fr}
  .ref-grid{grid-template-columns:1fr}
  .footer-nav{margin-left:0}
}
@media(max-width:480px){
  .hero{padding:40px 0 24px}
  .workspace-toolbar{gap:6px}
  .panel-fields{grid-template-columns:1fr}
}



/* Factory-injected deployment helpers. The AI owns the site design above this block. */
.ad-unit {
  width: min(100%, 720px);
  min-height: 120px;
  margin: 24px auto;
  display: block;
}

.legal-page {
  width: min(900px, calc(100% - 32px));
  margin: 40px auto;
}

.factory-fallback-nav {
  width: min(900px, calc(100% - 32px));
  margin: 24px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  font-size: 0.95rem;
}

.factory-fallback-nav a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}