@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Lora:ital,wght@0,400;0,600;1,400;1,600&display=swap');

:root{
  --void:    #090e18;
  --dark:    #0f1824;
  --panel:   #141f2e;
  --card:    #1a2840;
  --border:  #1e3050;
  --wave:    #06b6d4;
  --wave-lt: #cffafe;
  --wave-dim:#0891b2;
  --amber:   #f59e0b;
  --amber-lt:#fef3c7;
  --green:   #10b981;
  --green-lt:#d1fae5;
  --rose:    #f43f5e;
  --text:    #e2e8f0;
  --muted:   #64748b;
  --white:   #ffffff;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}

body{
  font-family:'Space Grotesk',system-ui,sans-serif;
  background:var(--void);
  color:var(--text);
  line-height:1.75;
  overflow-x:hidden;
}

/* ── HERO ── */
.hero{
  position:relative;overflow:hidden;
  min-height:520px;display:flex;align-items:center;
  background:var(--dark);
}
/* Waveform decoration */
.waveform-bg{
  position:absolute;inset:0;
  display:flex;align-items:center;gap:2px;padding:0;
  overflow:hidden;opacity:0.06;
}
.wf-bar{
  flex:1;min-width:3px;
  background:var(--wave);
  border-radius:2px;
  animation:pulse var(--dur) ease-in-out infinite alternate;
}
@keyframes pulse{
  from{transform:scaleY(var(--min))}
  to{transform:scaleY(var(--max))}
}
.hero-glow{
  position:absolute;inset:0;
  background:
    radial-gradient(ellipse 50% 60% at 75% 50%,rgba(6,182,212,0.1) 0%,transparent 65%),
    radial-gradient(ellipse 30% 40% at 20% 70%,rgba(245,158,11,0.06) 0%,transparent 60%);
}
.hero-inner{
  position:relative;z-index:2;
  max-width:1080px;margin:auto;padding:80px 55px;
  display:grid;grid-template-columns:1fr 260px;gap:55px;align-items:center;
}
.hero-kicker{
  font-size:0.7rem;font-weight:700;letter-spacing:0.22em;
  text-transform:uppercase;color:var(--wave);
  margin-bottom:16px;display:flex;align-items:center;gap:10px;
}
.hero-kicker::before{content:'';width:28px;height:1px;background:var(--wave)}
h1{
  font-family:'Lora',Georgia,serif;
  font-size:clamp(3rem,6vw,5rem);
  color:var(--white);line-height:0.95;
  letter-spacing:-0.02em;margin-bottom:22px;
}
h1 em{
  display:block;font-style:italic;
  font-size:0.4em;color:var(--wave);
  font-family:'Space Grotesk',sans-serif;
  font-weight:300;letter-spacing:0.05em;margin-bottom:10px;
}
.hero-desc{
  color:rgba(226,232,240,0.68);
  font-size:1.05rem;font-weight:300;line-height:1.72;
  max-width:460px;margin-bottom:32px;
}
.hero-stats{display:flex;gap:24px;flex-wrap:wrap}
.hs{padding-left:14px;border-left:2px solid var(--wave)}
.hs .hv{
  font-family:'Lora',serif;font-size:1.7rem;font-weight:700;
  color:var(--wave);line-height:1;
}
.hs .hl{font-size:0.76rem;color:var(--muted);margin-top:2px}

/* ── NAV ── */
.page-nav{
  background:var(--panel);
  border-bottom:1px solid var(--border);
  position:sticky;top:0;z-index:100;
  box-shadow:0 4px 16px rgba(0,0,0,0.3);
}
.nav-inner{
  max-width:1080px;margin:auto;padding:0 55px;
  display:flex;overflow-x:auto;scrollbar-width:none;
}
.nav-inner::-webkit-scrollbar{display:none}
.na{
  padding:13px 18px;font-size:0.8rem;font-weight:600;
  letter-spacing:0.05em;color:var(--muted);text-decoration:none;
  white-space:nowrap;border-bottom:2px solid transparent;transition:all .2s;
}
.na:hover{color:var(--wave)}
.na.active{color:var(--wave);border-bottom-color:var(--wave)}

/* ── LAYOUT ── */
.page-wrap{
  max-width:1080px;margin:auto;
  padding:64px 55px;
  display:grid;grid-template-columns:1fr 290px;gap:60px;align-items:start;
}
main{min-width:0}

/* ── SECTIONS ── */
.sec{margin-bottom:68px}
.sec-tag{
  font-size:0.7rem;font-weight:700;letter-spacing:0.2em;
  text-transform:uppercase;color:var(--wave);margin-bottom:12px;
}
.sec h2{
  font-family:'Lora',serif;font-size:1.9rem;font-weight:600;
  color:var(--white);margin-bottom:18px;line-height:1.2;
}
.sec p{font-size:0.97rem;color:var(--text);margin-bottom:16px;line-height:1.82}

/* ── CARTILAGE CARDS ── */
.cart-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:22px 0;
}
.cart-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:10px;padding:20px;
  border-top:3px solid var(--wave);
  transition:border-color .25s,box-shadow .25s;
}
.cart-card:hover{
  border-top-color:var(--amber);
  box-shadow:0 6px 24px rgba(6,182,212,0.12);
}
.cart-card .cc-name{
  font-family:'Lora',serif;font-size:1rem;font-weight:600;
  color:var(--wave);margin-bottom:6px;
}
.cart-card .cc-type{
  display:inline-block;font-size:0.68rem;font-weight:700;
  letter-spacing:0.08em;text-transform:uppercase;
  padding:2px 8px;border-radius:2px;margin-bottom:8px;
}
.ct-hyalin{background:rgba(6,182,212,0.15);color:var(--wave)}
.ct-elastic{background:rgba(245,158,11,0.15);color:var(--amber)}
.ct-fibro{background:rgba(16,185,129,0.15);color:var(--green)}
.cart-card p{font-size:0.83rem;color:rgba(226,232,240,0.72);line-height:1.6;margin:0}

/* ── VOCAL FOLD SPECTRUM ── */
.vf-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:12px;padding:24px;margin:22px 0;
}
.vf-title{
  font-family:'Lora',serif;font-size:1.05rem;font-weight:600;
  color:var(--white);margin-bottom:16px;
}
.vf-spectrum{
  display:flex;height:60px;gap:1px;align-items:flex-end;
  margin-bottom:12px;padding:8px 0;
}
.vf-bar{
  flex:1;border-radius:2px 2px 0 0;
  background:linear-gradient(to top,var(--wave-dim),var(--wave));
  transition:transform .15s;cursor:pointer;
}
.vf-bar:hover{transform:scaleY(1.2);transform-origin:bottom;background:var(--amber)}
.vf-labels{display:flex;justify-content:space-between;font-size:0.72rem;color:var(--muted)}
.freq-display{
  text-align:center;margin-top:8px;
  font-family:'Lora',serif;font-size:1.1rem;font-weight:600;color:var(--wave);
}

/* ── MUSCLE TABLE ── */
.mtbl{width:100%;border-collapse:collapse;font-size:0.87rem;margin:20px 0}
.mtbl th{
  background:var(--panel);color:var(--wave);
  border:1px solid var(--border);
  padding:10px 14px;text-align:left;font-weight:600;
  letter-spacing:0.04em;font-family:'Space Grotesk',sans-serif;
}
.mtbl td{
  padding:10px 14px;border:1px solid var(--border);
  color:rgba(226,232,240,0.82);vertical-align:top;line-height:1.55;
}
.mtbl tr:nth-child(odd) td{background:rgba(255,255,255,0.02)}
.mtbl tr:hover td{background:rgba(6,182,212,0.06)}
.badge{display:inline-block;padding:2px 8px;border-radius:3px;font-size:0.7rem;font-weight:700}
.b-out{background:rgba(6,182,212,0.15);color:var(--wave)}
.b-in{background:rgba(16,185,129,0.15);color:var(--green)}
.b-open{background:rgba(245,158,11,0.15);color:var(--amber)}
.b-close{background:rgba(244,63,94,0.15);color:var(--rose)}

/* ── ALERT BOXES ── */
.alert-box{
  border-radius:8px;padding:18px 22px;margin:22px 0;
}
.ab-warn{
  background:rgba(244,63,94,0.08);border:1px solid rgba(244,63,94,0.25);
  border-left:4px solid var(--rose);
}
.ab-info{
  background:rgba(6,182,212,0.07);border:1px solid rgba(6,182,212,0.2);
  border-left:4px solid var(--wave);
}
.ab-green{
  background:rgba(16,185,129,0.07);border:1px solid rgba(16,185,129,0.2);
  border-left:4px solid var(--green);
}
.ab-title{
  font-weight:700;font-size:0.92rem;margin-bottom:6px;
}
.ab-warn .ab-title{color:var(--rose)}
.ab-info .ab-title{color:var(--wave)}
.ab-green .ab-title{color:var(--green)}
.alert-box p{font-size:0.88rem;color:rgba(226,232,240,0.8);margin:0}

/* ── STEPS ── */
.steps{counter-reset:steps;margin:20px 0}
.step{
  display:grid;grid-template-columns:40px 1fr;gap:14px;
  padding:16px 0;border-bottom:1px solid var(--border);align-items:flex-start;
}
.step:last-child{border-bottom:none}
.step-n{
  counter-increment:steps;
  width:36px;height:36px;border-radius:50%;
  background:var(--wave);color:var(--void);
  font-weight:700;font-size:0.9rem;
  display:flex;align-items:center;justify-content:center;
  flex-shrink:0;
}
.step-body strong{display:block;font-weight:600;font-size:0.92rem;color:var(--white);margin-bottom:3px}
.step-body p{font-size:0.84rem;color:var(--muted);margin:0;line-height:1.55}

/* ── PATHO ── */
.patho{
  background:var(--card);border:1px solid var(--border);
  border-radius:10px;padding:20px;margin-bottom:12px;
  display:grid;grid-template-columns:48px 1fr;gap:14px;align-items:start;
  transition:border-color .2s;
}
.patho:hover{border-color:var(--wave)}
.patho-ico{
  width:44px;height:44px;border-radius:8px;
  display:flex;align-items:center;justify-content:center;font-size:1.3rem;
  background:rgba(6,182,212,0.1);flex-shrink:0;
}
.patho-body strong{display:block;font-family:'Lora',serif;font-size:0.97rem;color:var(--white);margin-bottom:4px}
.patho-body p{font-size:0.85rem;color:rgba(226,232,240,0.72);line-height:1.65;margin:0}
.p-tag{
  display:inline-block;font-size:0.68rem;font-weight:700;
  letter-spacing:0.08em;text-transform:uppercase;
  padding:2px 8px;border-radius:2px;margin-bottom:6px;
}
.pt-acute{background:rgba(244,63,94,0.15);color:var(--rose)}
.pt-chronic{background:rgba(245,158,11,0.15);color:var(--amber)}
.pt-cancer{background:rgba(167,139,250,0.15);color:#a78bfa}
.pt-func{background:rgba(6,182,212,0.15);color:var(--wave)}

/* ── SIDEBAR ── */
.sidebar{position:sticky;top:60px}
.widget{
  background:var(--panel);border:1px solid var(--border);
  border-radius:10px;padding:22px;margin-bottom:16px;
}
.w-title{
  font-family:'Lora',serif;font-size:1rem;font-weight:600;
  color:var(--white);margin-bottom:14px;padding-bottom:10px;
  border-bottom:1px solid var(--border);
  display:flex;align-items:center;gap:8px;
}
.w-title::before{
  content:'';width:12px;height:12px;border-radius:2px;
  background:var(--wave);flex-shrink:0;
}
.stat-row{
  display:flex;justify-content:space-between;align-items:baseline;
  padding:8px 0;border-bottom:1px solid var(--border);font-size:0.84rem;
}
.stat-row:last-child{border-bottom:none}
.stat-row .sl{color:var(--muted)}
.stat-row .sv{font-weight:700;color:var(--wave);font-family:'Lora',serif}

/* Pitch visualizer */
.pitch-vis{
  display:flex;align-items:flex-end;gap:3px;
  height:50px;margin:12px 0;
}
.pv-bar{
  flex:1;border-radius:2px;background:var(--wave);opacity:0.4;
}

/* ── FOOTER ── */
footer{
  background:var(--void);border-top:1px solid var(--border);
  text-align:center;padding:28px;font-size:0.78rem;color:var(--muted);
}
footer strong{color:rgba(226,232,240,0.7)}

@media(max-width:800px){
  .hero-inner{grid-template-columns:1fr}
  .page-wrap{grid-template-columns:1fr;padding:30px 20px}
  .sidebar{position:static}
  .cart-grid{grid-template-columns:1fr}
  .nav-inner{padding:0 20px}
}
@media(max-width:500px){
  .hero-inner{padding:50px 24px}
}