@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

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

:root{
  --primary:#6C5CE7;--secondary:#FD79A8;--accent:#00CEC9;
  --bg:#0A0A1A;--surface:#141428;--surface2:#1E1E38;
  --text:#E8E6F0;--text-dim:#8888A8;--border:#2A2A44;
  --radius:6px;--font:'Inter',system-ui,sans-serif;
}

html{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6}
body{min-height:100vh;display:flex;flex-direction:column}

.header{padding:1rem 1.5rem;display:flex;align-items:center;justify-content:space-between;gap:1rem;border-bottom:1px solid var(--border);flex-wrap:wrap}
.header-left{display:flex;align-items:center;gap:.75rem}
.header h1{font-size:1.05rem;font-weight:800;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.header p{font-size:.75rem;color:var(--text-dim)}

.main{flex:1;max-width:900px;width:100%;margin:0 auto;padding:1.25rem}

/* Switch selector */
.switch-bar{display:flex;gap:.35rem;margin-bottom:1rem;flex-wrap:wrap}
.switch-btn{padding:.35rem .65rem;border-radius:var(--radius);font-size:.72rem;font-weight:600;cursor:pointer;border:1px solid var(--border);background:transparent;color:var(--text-dim);transition:all .15s;font-family:var(--font)}
.switch-btn:hover{background:var(--surface2);color:var(--text)}
.switch-btn.active{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;border-color:transparent}

/* Controls row */
.controls-row{display:flex;gap:1rem;margin-bottom:1rem;flex-wrap:wrap;align-items:center}
.control{display:flex;align-items:center;gap:.4rem;font-size:.72rem;color:var(--text-dim)}
.control input[type=range]{width:80px;accent-color:var(--primary)}
.control-val{font-weight:700;color:var(--accent);min-width:28px}
.toggle-sm{display:inline-flex;align-items:center;gap:.3rem;padding:.25rem .5rem;border-radius:var(--radius);border:1px solid var(--border);background:transparent;color:var(--text-dim);font-size:.7rem;font-weight:600;cursor:pointer;transition:all .15s;font-family:var(--font)}
.toggle-sm.on{background:var(--primary);color:#fff;border-color:transparent}

/* Stats */
.stats-row{display:flex;gap:1rem;margin-bottom:1rem;flex-wrap:wrap}
.stat{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:.5rem .75rem;text-align:center;min-width:80px}
.stat .num{font-size:1.2rem;font-weight:800;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.stat .label{font-size:.6rem;color:var(--text-dim);text-transform:uppercase;letter-spacing:.04em}

/* Keyboard layout */
.keyboard{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1rem;user-select:none;-webkit-user-select:none}
.kb-row{display:flex;gap:4px;margin-bottom:4px;justify-content:center}
.key{height:44px;min-width:44px;border-radius:var(--radius);background:linear-gradient(to bottom,var(--surface2),#1A1A30);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:.7rem;font-weight:600;color:var(--text-dim);cursor:pointer;transition:all .1s;position:relative;box-shadow:0 3px 0 rgba(0,0,0,.4),inset 0 1px 0 rgba(255,255,255,.04)}
.key:hover{background:linear-gradient(to bottom,var(--surface2),#222244);color:var(--text)}
.key.pressed{transform:translateY(2px);box-shadow:0 1px 0 rgba(0,0,0,.4);background:var(--primary);color:#fff;border-color:var(--primary)}
.key.space{min-width:240px}
.key.w15{min-width:66px}.key.w175{min-width:77px}.key.w2{min-width:88px}.key.w225{min-width:99px}.key.w275{min-width:121px}

/* Heatmap */
.key .heat{position:absolute;inset:0;border-radius:var(--radius);opacity:0;transition:opacity .15s;pointer-events:none}

/* LED glow on pressed */
.key.pressed::after{content:'';position:absolute;inset:-4px;border-radius:calc(var(--radius)+2px);background:transparent;box-shadow:0 0 12px rgba(108,92,231,.4);pointer-events:none}

@keyframes fadeIn{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:768px){.header{padding:.75rem;flex-wrap:wrap}.main{padding:.75rem}.key{height:36px;min-width:36px;font-size:.6rem}.key.space{min-width:140px}.key.w15{min-width:50px}.key.w175{min-width:58px}.key.w2{min-width:66px}.key.w225{min-width:74px}.key.w275{min-width:90px}.kb-row{gap:2px;margin-bottom:2px}}