/* ===== STETHOSCOPE.CSS ===== */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display+SC:wght@400;700&family=Gentium+Book+Plus:ital,wght@0,400;0,700;1,400&family=Overpass+Mono:wght@300;400;500&display=swap');

:root {
  --ivory:     #f9f4ee;
  --cream:     #f2ead9;
  --paper:     #e8dcc8;
  --card:      #ffffff;
  --burg:      #7b1d1d;
  --burg-med:  #9c2727;
  --burg-light:#c0392b;
  --burg-pale: #f5e6e6;
  --burg-glow: rgba(123,29,29,0.08);
  --gold:      #a0783a;
  --gold-light:#c49a50;
  --text-dark: #1a0a0a;
  --text-body: #3d1f1f;
  --text-mid:  #7d5a5a;
  --text-light:#b89898;
  --border:    #ddd0c0;
  --border-b:  rgba(123,29,29,0.15);
  --font-h:    'Playfair Display SC', serif;
  --font-b:    'Gentium Book Plus', serif;
  --font-m:    'Overpass Mono', monospace;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-b);background:var(--ivory);color:var(--text-body);line-height:1.8;overflow-x:hidden}

/* Parchment texture */
body::before{content:'';position:fixed;inset:0;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");pointer-events:none;z-index:0}

::-webkit-scrollbar{width:4px}
::-webkit-scrollbar-track{background:var(--cream)}
::-webkit-scrollbar-thumb{background:var(--burg);border-radius:2px}

#progress-bar{position:fixed;top:0;left:0;height:3px;background:linear-gradient(90deg,var(--burg),var(--gold));width:0%;z-index:200;transition:width .1s}

/* NAV */
nav{position:fixed;top:0;left:0;right:0;z-index:100;height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 3rem;background:rgba(249,244,238,.96);backdrop-filter:blur(20px);border-bottom:1px solid var(--border)}
.nav-logo{display:flex;align-items:center;gap:.8rem;text-decoration:none}
.nav-medallion{width:36px;height:36px;border-radius:50%;border:2px solid var(--burg);display:grid;place-items:center;font-size:1.1rem}
.nav-name{font-family:var(--font-h);font-size:.85rem;color:var(--text-dark);letter-spacing:.06em}
.nav-links{display:flex;gap:2rem;list-style:none}
.nav-links a{font-family:var(--font-m);font-size:.72rem;color:var(--text-light);text-decoration:none;letter-spacing:.06em;transition:color .2s}
.nav-links a:hover{color:var(--burg)}
.nav-tag{font-family:var(--font-m);font-size:.68rem;color:var(--burg);background:var(--burg-pale);border:1px solid var(--border-b);padding:.28rem .8rem;border-radius:100px}

/* HERO */
.hero{position:relative;z-index:1;min-height:100vh;display:grid;grid-template-columns:55% 45%;align-items:center;gap:4rem;padding:8rem 3rem 4rem;overflow:hidden}
.hero-bg{position:absolute;right:0;top:0;bottom:0;width:46%;background:linear-gradient(135deg,var(--cream),var(--paper));z-index:-1}

.hero-eyebrow{font-family:var(--font-m);font-size:.7rem;color:var(--burg);letter-spacing:.2em;text-transform:uppercase;margin-bottom:1.2rem;display:flex;align-items:center;gap:.7rem}
.hero-eyebrow::before{content:'';width:24px;height:1px;background:var(--burg)}
.hero h1{font-family:var(--font-h);font-size:clamp(2.5rem,5vw,4.8rem);line-height:1.08;letter-spacing:.02em;color:var(--text-dark);margin-bottom:1.2rem}
.hero h1 em{color:var(--burg);font-style:italic;font-family:var(--font-b);font-size:.85em}
.hero-desc{font-size:.97rem;color:var(--text-mid);max-width:470px;line-height:1.9;margin-bottom:2.5rem;font-weight:400;font-style:italic}
.hero-stats{display:flex;gap:2.5rem;flex-wrap:wrap}
.hs{display:flex;flex-direction:column}
.hs-n{font-family:var(--font-h);font-size:2.2rem;color:var(--burg);line-height:1}
.hs-l{font-family:var(--font-m);font-size:.64rem;color:var(--text-light);letter-spacing:.1em;text-transform:uppercase;margin-top:.3rem}

/* Stethoscope SVG panel */
.scope-panel{position:relative;z-index:1;display:flex;align-items:center;justify-content:center}

/* BAND */
.band{background:var(--burg);padding:3.5rem 3rem}
.band-inner{max-width:1160px;margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);gap:2rem;text-align:center}
.bn{font-family:var(--font-h);font-size:2.5rem;color:#f5c6c6;line-height:1}
.bl{font-family:var(--font-m);font-size:.66rem;color:rgba(255,255,255,.45);letter-spacing:.1em;margin-top:.4rem}

/* SEC */
.sec{position:relative;z-index:1;max-width:1160px;margin:0 auto;padding:5rem 3rem}
.shead{display:flex;align-items:center;gap:1rem;margin-bottom:3rem;border-bottom:1px solid var(--border);padding-bottom:1rem}
.snum{font-family:var(--font-m);font-size:.7rem;color:var(--burg);letter-spacing:.18em;flex-shrink:0}
.stitle{font-family:var(--font-h);font-size:clamp(1.4rem,2.5vw,2.2rem);letter-spacing:.04em;color:var(--text-dark)}

/* AUSCULTATION CARDS */
.ausc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(255px,1fr));gap:1.5rem}
.ausc-card{background:var(--card);border:1px solid var(--border);padding:2rem;position:relative;overflow:hidden;transition:border-color .25s,box-shadow .25s,transform .25s}
.ausc-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--burg),var(--gold));transform:scaleX(0);transform-origin:left;transition:transform .35s}
.ausc-card:hover::before{transform:scaleX(1)}
.ausc-card:hover{border-color:var(--border-b);box-shadow:0 4px 20px var(--burg-glow);transform:translateY(-2px)}
.ausc-icon{font-size:1.8rem;margin-bottom:.8rem}
.ausc-site{font-family:var(--font-m);font-size:.65rem;color:var(--burg);letter-spacing:.15em;text-transform:uppercase;margin-bottom:.5rem}
.ausc-name{font-family:var(--font-h);font-size:1rem;letter-spacing:.04em;color:var(--text-dark);margin-bottom:.6rem}
.ausc-desc{font-size:.85rem;color:var(--text-mid);line-height:1.75;font-style:italic}
.ausc-normal{margin-top:.8rem;font-family:var(--font-m);font-size:.67rem;color:var(--gold)}

/* TABLE */
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:4px}
table{width:100%;border-collapse:collapse;font-size:.87rem}
thead{background:var(--burg-pale)}
th{font-family:var(--font-m);font-size:.67rem;letter-spacing:.12em;text-transform:uppercase;color:var(--burg);padding:.9rem 1.2rem;text-align:left;border-bottom:1px solid var(--border)}
td{padding:.9rem 1.2rem;border-bottom:1px solid rgba(123,29,29,.06);color:var(--text-body);vertical-align:top}
tr:hover td{background:var(--burg-pale)}
tr:last-child td{border-bottom:none}
.tag{font-family:var(--font-m);font-size:.63rem;padding:.18rem .55rem;border-radius:2px;text-transform:uppercase;letter-spacing:.06em}
.tag-n{background:#e8f5e9;color:#1b5e20;border:1px solid #c8e6c9}
.tag-p{background:var(--burg-pale);color:var(--burg-med);border:1px solid var(--border-b)}
.tag-a{background:#fff3e0;color:#e65100;border:1px solid #ffcc02}

/* HISTORY TIMELINE */
.timeline{position:relative;padding-left:2.5rem}
.timeline::before{content:'';position:absolute;left:0;top:0;bottom:0;width:1px;background:linear-gradient(to bottom,var(--burg),transparent)}
.tl-item{position:relative;margin-bottom:2.5rem;opacity:0;transform:translateX(-12px);transition:opacity .5s,transform .5s}
.tl-item.visible{opacity:1;transform:translateX(0)}
.tl-item::before{content:'';position:absolute;left:-2.6rem;top:.35rem;width:10px;height:10px;border-radius:50%;background:var(--ivory);border:2px solid var(--burg);box-shadow:0 0 0 3px var(--burg-pale)}
.tl-yr{font-family:var(--font-m);font-size:.7rem;color:var(--burg);letter-spacing:.15em;margin-bottom:.3rem}
.tl-ev{font-family:var(--font-h);font-size:.95rem;letter-spacing:.04em;color:var(--text-dark);margin-bottom:.4rem}
.tl-desc{font-size:.86rem;color:var(--text-mid);max-width:640px;line-height:1.75;font-style:italic}

/* GLOSSARY */
.gloss{list-style:none}
.gloss-item{display:grid;grid-template-columns:180px 1fr;gap:1.5rem;padding:1rem 0;border-bottom:1px solid rgba(123,29,29,.07)}
.gloss-item:hover{background:var(--burg-pale);margin:0 -.5rem;padding-left:.5rem;padding-right:.5rem}
.gloss-term{font-family:var(--font-h);font-size:.88rem;color:var(--burg);letter-spacing:.04em}
.gloss-def{font-size:.86rem;color:var(--text-mid);line-height:1.75;font-style:italic}

/* INFO */
.infobox{background:var(--burg-pale);border:1px solid var(--border-b);border-left:3px solid var(--burg);padding:1.2rem 1.5rem;font-size:.87rem;color:var(--text-body);line-height:1.75;margin-top:1rem}

/* FI */
.fi{opacity:0;transform:translateY(16px);transition:opacity .6s,transform .6s}
.fi.visible{opacity:1;transform:translateY(0)}

footer{background:var(--text-dark);color:rgba(255,255,255,.3);padding:2.5rem 3rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:1rem;z-index:1;position:relative}
.ft-brand{font-family:var(--font-h);font-size:1rem;color:rgba(255,255,255,.6);letter-spacing:.08em}
.ft-copy{font-family:var(--font-m);font-size:.7rem}

@media(max-width:900px){
  .hero{grid-template-columns:1fr;padding:7rem 1.2rem 3rem}
  .hero-bg,.scope-panel{display:none}
  .band-inner{grid-template-columns:repeat(2,1fr)}
  nav{padding:0 1.2rem}
  .nav-links{display:none}
  .sec{padding:3rem 1.2rem}
  .gloss-item{grid-template-columns:1fr;gap:.3rem}
}