:root {
  --primary: #0EA5E9; --primary-hover: #0284C7; --secondary: #38BDF8;
  --accent: #F59E0B; --success: #10B981; --error: #EF4444;
  --bg: #0B1120; --bg-elevated: #0F1A2E; --bg-card: #132240;
  --bg-input: #0D1628; --text: #E2ECF8; --text-muted: #7DA8CC; --text-dim: #3E6080;
  --border: #1A3050; --border-hover: #2A4A70; --radius: 12px; --radius-sm: 8px;
  --font: 'Inter', system-ui, sans-serif; --mono: monospace; --transition: 200ms ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;overflow:hidden}
.app{display:flex;flex-direction:column;height:100vh}

.header{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;background:var(--bg-elevated);border-bottom:1px solid var(--border);gap:12px;flex-shrink:0;flex-wrap:wrap}
.header-left{display:flex;align-items:center;gap:12px}
.logo{font-size:1.3rem}
.header-title{font-size:1.05rem;font-weight:700;background:linear-gradient(135deg,var(--primary),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.header-right{display:flex;gap:12px;align-items:center}
.slider-label{display:flex;align-items:center;gap:6px;font-size:.72rem;color:var(--text-muted)}
.slider{width:80px;accent-color:var(--primary)}

.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;font-size:.8rem;font-weight:500;font-family:var(--font);border:none;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-hover));color:#fff;box-shadow:0 2px 8px rgba(14,165,233,.3)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 16px rgba(14,165,233,.4)}
.btn-ghost{background:transparent;color:var(--text-muted);border:1px solid var(--border)}
.btn-ghost:hover{background:var(--bg-card);color:var(--text);border-color:var(--border-hover)}
.btn-sm{padding:5px 10px;font-size:.72rem}
.btn-xs{padding:3px 8px;font-size:.65rem}

.main{display:grid;grid-template-columns:1fr 280px;flex:1;overflow:hidden}
.main.no-detail{grid-template-columns:1fr}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px;padding:16px;overflow-y:auto;align-content:start}
.easing-card{padding:12px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;transition:all var(--transition);display:flex;flex-direction:column;gap:6px}
.easing-card:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:0 4px 16px rgba(14,165,233,.15)}
.easing-card.active{border-color:var(--primary);background:rgba(14,165,233,.08)}
.easing-name{font-size:.72rem;font-weight:600;text-align:center}
.easing-track{height:6px;background:var(--bg-input);border-radius:3px;overflow:hidden;position:relative}
.easing-ball{width:6px;height:6px;border-radius:50%;background:var(--primary);position:absolute;left:0;top:0}
.easing-curve{width:100%;height:60px}

.detail-panel{background:var(--bg-elevated);border-left:1px solid var(--border);padding:16px;display:flex;flex-direction:column;gap:12px;overflow-y:auto}
.detail-head{display:flex;align-items:center;justify-content:space-between}
.detail-title{font-size:.9rem;font-weight:600}
.detail-preview{height:40px;background:var(--bg-input);border-radius:var(--radius-sm);position:relative;overflow:hidden}
.dot{width:24px;height:24px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));position:absolute;top:8px;left:8px}
#curve-canvas{width:100%;height:auto;border-radius:var(--radius-sm);background:var(--bg-input);border:1px solid var(--border)}
.code-output{padding:10px;font-family:var(--mono);font-size:.7rem;line-height:1.5;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--secondary);overflow:auto;white-space:pre-wrap;margin:0;max-height:120px}

.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);padding:10px 20px;background:var(--bg-card);border:1px solid var(--primary);border-radius:var(--radius-sm);color:var(--primary);font-size:.8rem;font-weight:500;z-index:200;animation:toast-in .3s ease}
@keyframes toast-in{from{opacity:0;transform:translateX(-50%) translateY(10px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}
::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}
@media(max-width:768px){.main{grid-template-columns:1fr!important}.detail-panel{position:fixed;bottom:0;left:0;right:0;max-height:50vh;border-left:none;border-top:1px solid var(--border)}.grid{grid-template-columns:repeat(auto-fill,minmax(110px,1fr))}}