/* ===== ALZHEIMER.CSS ===== */
@import url('https://fonts.googleapis.com/css2?family=EB+Garamond:ital,wght@0,400;0,500;1,400;1,500&family=Inter:wght@300;400;500;600&family=Fira+Code:wght@300;400&display=swap');

:root {
  --fog:        #f4f6fa;
  --mist:       #e8ecf4;
  --haze:       #d5dcea;
  --slate:      #4a5568;
  --blue-deep:  #2d4a7a;
  --blue-med:   #3d6494;
  --blue-pale:  #dbe8f8;
  --blue-glow:  rgba(61,100,148,.08);
  --silver:     #718096;
  --text-dark:  #1a202c;
  --text-body:  #2d3748;
  --text-mid:   #718096;
  --text-light: #a0aec0;
  --border:     #cbd5e0;
  --border-b:   rgba(45,74,122,.15);
  --warn:       #c05621;
  --font-h:     'EB Garamond', serif;
  --font-b:     'Inter', sans-serif;
  --font-m:     'Fira Code', monospace;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-b);background:var(--fog);color:var(--text-body);line-height:1.78;overflow-x:hidden}
body::before{content:'';position:fixed;inset:0;background:radial-gradient(ellipse 80% 60% at 30% 30%,rgba(61,100,148,.04) 0%,transparent 65%);pointer-events:none;z-index:0}
::-webkit-scrollbar{width:4px}
::-webkit-scrollbar-track{background:var(--fog)}
::-webkit-scrollbar-thumb{background:var(--blue-med);border-radius:2px}

#progress-bar{position:fixed;top:0;left:0;height:2px;background:linear-gradient(90deg,var(--blue-deep),var(--blue-med));width:0%;z-index:200;transition:width .1s}

nav{position:fixed;top:0;left:0;right:0;z-index:100;height:62px;display:flex;align-items:center;justify-content:space-between;padding:0 3rem;background:rgba(244,246,250,.95);backdrop-filter:blur(20px);border-bottom:1px solid var(--border)}
.nav-logo{display:flex;align-items:center;gap:.8rem;text-decoration:none}
.nav-icon{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--blue-deep),var(--blue-med));display:grid;place-items:center;font-size:.75rem;color:white;font-family:var(--font-h);font-style:italic}
.nav-name{font-family:var(--font-h);font-size:1.05rem;font-style:italic;color:var(--text-dark)}
.nav-links{display:flex;gap:2rem;list-style:none}
.nav-links a{font-family:var(--font-m);font-size:.7rem;color:var(--text-light);text-decoration:none;letter-spacing:.06em;transition:color .2s}
.nav-links a:hover{color:var(--blue-med)}
.nav-tag{font-family:var(--font-m);font-size:.67rem;color:var(--blue-med);background:var(--blue-pale);border:1px solid var(--border-b);padding:.28rem .8rem;border-radius:100px}

.hero{position:relative;z-index:1;min-height:100vh;display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:4rem;padding:8rem 3rem 4rem;overflow:hidden}
.hero-bg{position:absolute;right:0;top:0;bottom:0;width:48%;background:linear-gradient(135deg,var(--mist),var(--haze));z-index:-1;border-radius:60% 0 0 60%}
.hero-eyebrow{font-family:var(--font-m);font-size:.68rem;color:var(--blue-med);letter-spacing:.2em;text-transform:uppercase;margin-bottom:1.2rem;display:flex;align-items:center;gap:.7rem}
.hero-eyebrow::before{content:'';width:20px;height:1px;background:var(--blue-med)}
.hero h1{font-family:var(--font-h);font-size:clamp(3rem,6.5vw,6rem);font-style:italic;line-height:1;letter-spacing:-.01em;color:var(--text-dark);margin-bottom:1.2rem}
.hero h1 .sub{display:block;font-size:.42em;font-style:normal;font-weight:500;color:var(--blue-med);letter-spacing:.04em;font-family:var(--font-b);margin-top:.3rem}
.hero-desc{font-size:.95rem;color:var(--text-mid);max-width:460px;line-height:1.88;margin-bottom:2.5rem;font-weight:300}
.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;font-style:italic;color:var(--blue-deep);line-height:1}
.hs-l{font-family:var(--font-m);font-size:.63rem;color:var(--text-light);letter-spacing:.1em;text-transform:uppercase;margin-top:.3rem}
.brain-visual{display:flex;align-items:center;justify-content:center;position:relative;z-index:1}

.band{background:var(--blue-deep);padding:3.5rem 3rem;z-index:1;position:relative}
.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:2.8rem;font-style:italic;color:rgba(255,255,255,.85);line-height:1}
.bl{font-family:var(--font-m);font-size:.65rem;color:rgba(255,255,255,.4);letter-spacing:.1em;margin-top:.4rem}

.sec{position:relative;z-index:1;max-width:1160px;margin:0 auto;padding:5rem 3rem}
.shead{display:flex;align-items:baseline;gap:1rem;margin-bottom:3rem;padding-bottom:.8rem;border-bottom:1px solid var(--border)}
.snum{font-family:var(--font-m);font-size:.68rem;color:var(--blue-med);letter-spacing:.18em;flex-shrink:0}
.stitle{font-family:var(--font-h);font-size:clamp(1.5rem,2.8vw,2.3rem);font-style:italic;color:var(--text-dark)}

.cards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1.5rem}
.a-card{background:white;border:1px solid var(--border);border-radius:10px;padding:2rem;transition:box-shadow .25s,transform .25s}
.a-card:hover{box-shadow:0 6px 24px var(--blue-glow);transform:translateY(-2px)}
.ac-icon{font-size:1.8rem;margin-bottom:.8rem}
.ac-name{font-family:var(--font-h);font-size:1.05rem;font-style:italic;color:var(--text-dark);margin-bottom:.4rem}
.ac-desc{font-size:.84rem;color:var(--text-mid);line-height:1.75}

.stage-flow{display:flex;flex-direction:column;gap:0;border:1px solid var(--border);border-radius:8px;overflow:hidden}
.stage{background:white;padding:1.4rem 1.8rem;display:grid;grid-template-columns:80px 1fr;gap:1.5rem;align-items:start;border-bottom:1px solid var(--border);opacity:0;transform:translateX(-12px);transition:opacity .5s,transform .5s}
.stage.visible{opacity:1;transform:translateX(0)}
.stage:last-child{border-bottom:none}
.stage:hover{background:var(--mist)}
.stage-num{font-family:var(--font-h);font-size:1.3rem;font-style:italic;color:var(--blue-med);text-align:right;padding-top:.1rem}
.stage-body{}
.stage-label{font-family:var(--font-b);font-size:.92rem;font-weight:600;color:var(--text-dark);margin-bottom:.35rem}
.stage-desc{font-size:.84rem;color:var(--text-mid);line-height:1.72}
.stage-mmse{font-family:var(--font-m);font-size:.7rem;color:var(--blue-med);margin-top:.4rem}

.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:6px}
table{width:100%;border-collapse:collapse;font-size:.87rem}
thead{background:var(--blue-pale)}
th{font-family:var(--font-m);font-size:.65rem;letter-spacing:.12em;text-transform:uppercase;color:var(--blue-deep);padding:.9rem 1.2rem;text-align:left;border-bottom:1px solid var(--border)}
td{padding:.9rem 1.2rem;border-bottom:1px solid rgba(45,74,122,.06);color:var(--text-body);vertical-align:top}
tr:hover td{background:var(--blue-glow)}
tr:last-child td{border-bottom:none}
.tag{font-family:var(--font-m);font-size:.62rem;padding:.18rem .55rem;border-radius:3px;text-transform:uppercase;letter-spacing:.06em}
.tag-b{background:var(--blue-pale);color:var(--blue-deep);border:1px solid var(--border-b)}
.tag-g{background:#d1fae5;color:#065f46;border:1px solid #a7f3d0}
.tag-o{background:#fef3c7;color:#92400e;border:1px solid #fde68a}

.alert-b{background:var(--blue-pale);border:1px solid var(--border-b);border-left:3px solid var(--blue-med);padding:1.2rem 1.5rem;font-size:.87rem;color:var(--text-body);line-height:1.75;margin-top:1rem}
.alert-w{background:#fffbeb;border:1px solid #fde68a;border-left:3px solid var(--warn);padding:1.2rem 1.5rem;font-size:.87rem;color:#78350f;line-height:1.75;margin-top:.8rem}

.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{font-family:var(--font-m);font-size:.7rem}

@media(max-width:900px){
  .hero{grid-template-columns:1fr;padding:7rem 1.2rem 3rem}
  .hero-bg,.brain-visual{display:none}
  .band-inner{grid-template-columns:repeat(2,1fr)}
  nav{padding:0 1.2rem}.nav-links{display:none}
  .sec{padding:3rem 1.2rem}
  .stage{grid-template-columns:60px 1fr}
  footer{padding:2rem 1.2rem}
}