/* ========== Reset & Base ========== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#A29BFE;--primary-dim:rgba(162,155,254,.12);
  --secondary:#6C5CE7;--accent:#FD79A8;--accent-dim:rgba(253,121,168,.12);
  --bg:#0D0A14;--surface:#15101F;--surface2:#1E1730;
  --border:rgba(162,155,254,.1);--text:#F1F0F7;--text-dim:#9B95B0;
  --radius:16px;--font:'Inter',system-ui,-apple-system,sans-serif;
  --transition:300ms ease;
  --green:#2ECC71;--yellow:#F1C40F;--orange:#E67E22;--red:#E74C3C;
}
html{font-size:16px;scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.6;min-height:100vh}

/* ========== Header ========== */
.header{position:sticky;top:0;z-index:100;backdrop-filter:blur(16px);background:rgba(13,10,20,.8);border-bottom:1px solid var(--border)}
.header-inner{max-width:800px;margin:0 auto;padding:.75rem 1.5rem;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:.75rem}
.logo{display:flex;align-items:center;gap:.5rem}
.logo-icon{font-size:1.25rem}
.logo h1{font-size:1.1rem;font-weight:700;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.header-right{display:flex;align-items:center;gap:.75rem}
.streak{font-size:.8rem;color:var(--accent);font-weight:600}

/* ========== Buttons ========== */
.btn{display:inline-flex;align-items:center;gap:.3rem;padding:.45rem .85rem;border:none;border-radius:10px;font-size:.8rem;font-weight:600;cursor:pointer;transition:all var(--transition);font-family:var(--font)}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;font-size:.9rem}
.btn-primary:hover{filter:brightness(1.15);transform:translateY(-1px)}
.btn-block{width:100%;justify-content:center;padding:.75rem}
.btn-sm{background:var(--surface2);color:var(--text-dim);border:1px solid var(--border)}
.btn-sm:hover{border-color:var(--primary);color:var(--primary)}
.btn-chip{background:var(--surface2);color:var(--text-dim);border:1px solid var(--border);font-size:.7rem;padding:.3rem .7rem;border-radius:20px}
.btn-chip:hover,.btn-chip.active{border-color:var(--primary);color:var(--primary);background:var(--primary-dim)}

/* ========== Main ========== */
.main{max-width:800px;margin:0 auto;padding:1.5rem}

/* ========== Glass Card ========== */
.glass-card{background:rgba(21,16,31,.6);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;margin-bottom:1.5rem}

/* ========== Gauge ========== */
.gauge-section{text-align:center;margin-bottom:2rem}
.gauge{position:relative;width:220px;margin:0 auto}
.gauge-svg{width:100%}
.gauge-value{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);font-size:2.5rem;font-weight:700;color:var(--primary)}
.gauge-label{text-align:center;font-size:.85rem;color:var(--text-dim);margin-top:.5rem}

/* ========== Section Title ========== */
.section-title{font-size:1rem;font-weight:700;margin-bottom:1rem;display:flex;align-items:center;gap:.5rem}
.section-title::before{content:'';width:4px;height:20px;background:linear-gradient(to bottom,var(--primary),var(--accent));border-radius:2px}

/* ========== Sliders ========== */
.slider-group{margin-bottom:1.25rem}
.slider-label{display:flex;justify-content:space-between;align-items:center;margin-bottom:.4rem;font-size:.85rem}
.slider-val{font-weight:700;color:var(--primary);min-width:2rem;text-align:right}
input[type="range"]{-webkit-appearance:none;width:100%;height:6px;border-radius:3px;background:var(--surface2);outline:none;transition:background var(--transition)}
input[type="range"]::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;border-radius:50%;background:var(--primary);cursor:pointer;box-shadow:0 0 8px rgba(162,155,254,.4);transition:transform var(--transition)}
input[type="range"]::-webkit-slider-thumb:hover{transform:scale(1.2)}
input[type="range"]::-moz-range-thumb{width:20px;height:20px;border-radius:50%;background:var(--primary);cursor:pointer;border:none}

/* ========== Recommendations ========== */
.rec-item{display:flex;align-items:flex-start;gap:.75rem;padding:.75rem;background:var(--surface2);border-radius:10px;margin-bottom:.5rem;font-size:.85rem;border-left:3px solid var(--primary)}
.rec-item .rec-icon{font-size:1.1rem;flex-shrink:0}

/* ========== Chart ========== */
.chart-section{margin-bottom:1.5rem}
.chart-controls{display:flex;gap:.5rem;margin-bottom:1rem}
canvas{width:100%;border-radius:var(--radius);background:var(--surface)}

/* ========== Summary ========== */
.summary-stat{display:flex;justify-content:space-between;padding:.5rem 0;border-bottom:1px solid var(--border);font-size:.85rem}
.summary-stat:last-child{border:none}
.summary-stat .val{font-weight:700;color:var(--primary)}

/* ========== Toast ========== */
.toast{position:fixed;bottom:2rem;left:50%;transform:translateX(-50%) translateY(100px);background:var(--surface2);color:var(--text);padding:.6rem 1.25rem;border-radius:var(--radius);font-size:.8rem;font-weight:500;border:1px solid var(--primary);box-shadow:0 8px 32px rgba(0,0,0,.4);transition:transform 300ms ease;z-index:9999;pointer-events:none}
.toast.show{transform:translateX(-50%) translateY(0)}

/* ========== Responsive ========== */
@media(max-width:480px){
  .main{padding:1rem}
  .gauge{width:180px}
  .gauge-value{font-size:2rem}
}