@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');
:root {
  --bg-primary: #0a0a1a;
  --bg-gradient: linear-gradient(135deg, #0a0a1a 0%, #1a1a3e 50%, #0d0d2b 100%);
  --glass-bg: rgba(255,255,255,0.04);
  --glass-border: rgba(255,255,255,0.08);
  --glass-blur: blur(20px);
  --accent-cyan: #00f0ff;
  --accent-green: #00ff88;
  --accent-orange: #ff9f43;
  --accent-red: #ff4757;
  --accent-purple: #a855f7;
  --text-primary: #f0f0f8;
  --text-secondary: rgba(240,240,248,0.6);
  --text-muted: rgba(240,240,248,0.35);
  --font: 'Inter', sans-serif;
  --r-sm: 8px; --r-md: 14px; --r-lg: 20px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.3);
  --tr-fast: 0.2s ease; --tr-smooth: 0.4s ease;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;}
html{font-size:16px;-webkit-font-smoothing:antialiased;}
body{font-family:var(--font);background:var(--bg-gradient);color:var(--text-primary);min-height:100vh;overflow-x:hidden;}
body::before{content:'';position:fixed;inset:0;background:radial-gradient(2px 2px at 20% 30%,rgba(0,240,255,.12),transparent),radial-gradient(2px 2px at 80% 70%,rgba(0,255,136,.08),transparent);pointer-events:none;z-index:0;animation:bgShift 20s ease-in-out infinite alternate;}
@keyframes bgShift{0%{opacity:.6}100%{opacity:1;transform:translateY(-10px)}}

#app-container{position:relative;z-index:1;display:grid;grid-template-rows:auto 1fr auto;min-height:100vh;max-width:1600px;margin:0 auto;padding:16px 20px;gap:14px;}

#top-bar{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;background:var(--glass-bg);backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);border-radius:var(--r-lg);box-shadow:var(--shadow-card);}
.app-title{display:flex;align-items:center;gap:12px;font-size:1.35rem;font-weight:700;}
.brand-text{background:linear-gradient(135deg,var(--accent-cyan),var(--accent-green));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;}
.model-status{display:flex;align-items:center;gap:8px;font-size:.82rem;font-weight:500;color:var(--text-secondary);padding:6px 16px;background:rgba(255,255,255,.03);border-radius:100px;border:1px solid var(--glass-border);}
.status-dot{width:8px;height:8px;border-radius:50%;background:var(--accent-orange);transition:background var(--tr-smooth);box-shadow:0 0 8px rgba(255,159,67,.5);}
.status-dot.ready{background:var(--accent-green);box-shadow:0 0 8px rgba(0,255,136,.5);animation:pulseG 2s ease-in-out infinite;}
@keyframes pulseG{0%,100%{box-shadow:0 0 8px rgba(0,255,136,.5)}50%{box-shadow:0 0 16px rgba(0,255,136,.8)}}

#main-content{display:grid;grid-template-columns:1fr 340px;gap:14px;min-height:0;}

#canvas-wrapper{position:relative;background:var(--glass-bg);backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);border-radius:var(--r-lg);box-shadow:var(--shadow-card);overflow:hidden;display:flex;align-items:center;justify-content:center;min-height:480px;}
#canvas-wrapper canvas{border-radius:var(--r-md);display:block!important;}

#loading-overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;background:rgba(10,10,26,.85);backdrop-filter:blur(8px);z-index:10;transition:opacity .6s,visibility .6s;border-radius:var(--r-lg);}
#loading-overlay.hidden{opacity:0;visibility:hidden;pointer-events:none;}
.loading-spinner{width:48px;height:48px;border:3px solid rgba(0,240,255,.15);border-top-color:var(--accent-cyan);border-radius:50%;animation:spin .8s linear infinite;}
@keyframes spin{to{transform:rotate(360deg)}}
.loading-text{font-size:.95rem;font-weight:500;color:var(--text-secondary);}

#canvas-exercise-label{position:absolute;top:16px;left:16px;padding:8px 18px;background:rgba(0,0,0,.6);backdrop-filter:blur(12px);border:1px solid var(--glass-border);border-radius:100px;font-size:.85rem;font-weight:600;color:var(--accent-cyan);text-transform:uppercase;letter-spacing:.08em;z-index:5;}
#canvas-rep-display{position:absolute;top:16px;right:16px;padding:8px 18px;background:rgba(0,0,0,.6);backdrop-filter:blur(12px);border:1px solid var(--glass-border);border-radius:100px;font-size:.85rem;font-weight:700;color:var(--accent-green);z-index:5;}

#sidebar{display:flex;flex-direction:column;gap:12px;overflow-y:auto;max-height:calc(100vh - 150px);padding-right:4px;}
#sidebar::-webkit-scrollbar{width:4px;}
#sidebar::-webkit-scrollbar-thumb{background:rgba(255,255,255,.1);border-radius:100px;}

.glass-card{background:var(--glass-bg);backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);border-radius:var(--r-md);padding:18px;box-shadow:var(--shadow-card);transition:border-color var(--tr-fast);}
.glass-card:hover{border-color:rgba(255,255,255,.12);}
.card-header{display:flex;align-items:center;gap:8px;margin-bottom:14px;font-size:.78rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.1em;}

#exercise-selector{display:grid;grid-template-columns:1fr 1fr 1fr;gap:6px;}
.exercise-btn{display:flex;flex-direction:column;align-items:center;gap:4px;padding:10px 4px;background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.06);border-radius:var(--r-sm);color:var(--text-secondary);font-family:var(--font);font-size:.68rem;font-weight:500;cursor:pointer;transition:all var(--tr-fast);text-transform:uppercase;letter-spacing:.05em;}
.exercise-btn .btn-icon{font-size:1.2rem;transition:transform .5s cubic-bezier(.34,1.56,.64,1);}
.exercise-btn:hover{background:rgba(0,240,255,.06);border-color:rgba(0,240,255,.2);color:var(--text-primary);transform:translateY(-1px);}
.exercise-btn.active{background:rgba(0,240,255,.1);border-color:var(--accent-cyan);color:var(--accent-cyan);box-shadow:0 0 20px rgba(0,240,255,.15);}

.rep-counter-value{font-size:3.5rem;font-weight:900;text-align:center;line-height:1;background:linear-gradient(135deg,var(--accent-cyan),var(--accent-green));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;}
.rep-counter-value.bump{animation:repBump .4s cubic-bezier(.34,1.56,.64,1);}
@keyframes repBump{0%{transform:scale(1)}40%{transform:scale(1.25)}100%{transform:scale(1)}}
.rep-label{text-align:center;font-size:.72rem;font-weight:500;color:var(--text-muted);text-transform:uppercase;letter-spacing:.12em;margin-top:6px;}

.hold-timer-container{display:none;text-align:center;}
.hold-timer-container.active{display:block;}
.hold-timer-value{font-size:2.5rem;font-weight:800;color:var(--accent-purple);font-variant-numeric:tabular-nums;}
.hold-timer-label{font-size:.72rem;font-weight:500;color:var(--text-muted);text-transform:uppercase;letter-spacing:.12em;margin-top:4px;}

.gauge-container{display:flex;align-items:center;justify-content:center;padding:8px 0;}
.gauge-svg{width:120px;height:120px;}
.gauge-bg{fill:none;stroke:rgba(255,255,255,.06);stroke-width:8;}
.gauge-fill{fill:none;stroke-width:8;stroke-linecap:round;transition:stroke-dashoffset .6s ease,stroke .4s ease;filter:drop-shadow(0 0 6px rgba(0,240,255,.3));}
.gauge-text{font-family:var(--font);font-size:1.6rem;font-weight:800;fill:var(--text-primary);text-anchor:middle;dominant-baseline:central;}
.gauge-label{font-family:var(--font);font-size:.55rem;font-weight:600;fill:var(--text-muted);text-anchor:middle;text-transform:uppercase;letter-spacing:.1em;}

.angle-item{display:grid;grid-template-columns:90px 1fr 42px;align-items:center;gap:10px;padding:6px 0;}
.angle-item+.angle-item{border-top:1px solid rgba(255,255,255,.04);}
.angle-name{font-size:.72rem;font-weight:500;color:var(--text-secondary);white-space:nowrap;}
.angle-bar-track{height:6px;background:rgba(255,255,255,.06);border-radius:100px;overflow:hidden;}
.angle-bar-fill{height:100%;border-radius:100px;background:var(--accent-cyan);transition:width .3s ease,background .3s ease;min-width:2px;}
.angle-bar-fill.warning{background:var(--accent-orange);}
.angle-bar-fill.bad{background:var(--accent-red);}
.angle-value{font-size:.75rem;font-weight:700;color:var(--text-primary);text-align:right;font-variant-numeric:tabular-nums;}

.feedback-list{display:flex;flex-direction:column;gap:6px;}
.feedback-item{display:flex;align-items:flex-start;gap:8px;padding:10px 12px;border-radius:var(--r-sm);font-size:.78rem;font-weight:500;line-height:1.4;animation:feedSlide .3s ease;}
@keyframes feedSlide{from{opacity:0;transform:translateX(10px)}to{opacity:1;transform:translateX(0)}}
.feedback-item.good{background:rgba(0,255,136,.08);border:1px solid rgba(0,255,136,.15);color:var(--accent-green);}
.feedback-item.warning{background:rgba(255,159,67,.08);border:1px solid rgba(255,159,67,.15);color:var(--accent-orange);}
.feedback-item.bad{background:rgba(255,71,87,.08);border:1px solid rgba(255,71,87,.15);color:var(--accent-red);}

#bottom-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding:14px 20px;background:var(--glass-bg);backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);border-radius:var(--r-lg);box-shadow:var(--shadow-card);}
.stat-item{display:flex;align-items:center;gap:10px;justify-content:center;}
.stat-icon{font-size:1.1rem;}
.stat-value{font-size:1.05rem;font-weight:700;color:var(--text-primary);font-variant-numeric:tabular-nums;}
.stat-label{font-size:.65rem;font-weight:500;color:var(--text-muted);text-transform:uppercase;letter-spacing:.08em;}

@media(max-width:900px){
  #main-content{grid-template-columns:1fr;}
  #sidebar{max-height:none;flex-direction:row;flex-wrap:wrap;}
  #sidebar .glass-card{flex:1 1 280px;}
  #bottom-bar{grid-template-columns:repeat(2,1fr);}
}
@media(max-width:500px){
  #app-container{padding:8px 10px;gap:8px;}
  .app-title{font-size:1.05rem;}
  .rep-counter-value{font-size:2.5rem;}
}