/* ============================================================
   LUNGHEALTHHUB.COM — Shared Stylesheet
   ============================================================ */
:root {
  --teal:      #0D9B8C;
  --teal-dk:   #07706A;
  --teal-lt:   #E8F7F5;
  --teal-wash: #F0FAFA;
  --coral:     #FF6B35;
  --coral-dk:  #E55A26;
  --ink:       #1A2B2B;
  --ink-mid:   #3D5252;
  --ink-lt:    #6B8585;
  --white:     #FFFFFF;
  --border:    #D4ECEA;
  --ff-d: 'DM Serif Display', Georgia, serif;
  --ff-b: 'Inter', system-ui, sans-serif;
  --ff-m: 'DM Mono', monospace;
  --r: 8px;
  --sh: 0 2px 16px rgba(13,155,140,.08);
  --sh-md: 0 4px 32px rgba(13,155,140,.13);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--ff-b);color:var(--ink);background:var(--white);line-height:1.65;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--teal);text-decoration:none;cursor:pointer}
a:hover{color:var(--teal-dk)}
.page{display:none}
.page.active{display:block}
button{font-family:var(--ff-b);cursor:pointer}

/* HEADER */
header{position:sticky;top:0;z-index:200;background:var(--white);border-bottom:1px solid var(--border);padding:0 2rem;height:64px;display:flex;align-items:center;justify-content:space-between;box-shadow:0 1px 8px rgba(13,155,140,.06)}
.logo{font-family:var(--ff-d);font-size:1.3rem;color:var(--teal-dk);cursor:pointer;display:flex;align-items:center;gap:.5rem;border:none;background:none}
.logo-dot{width:26px;height:26px;border:2.5px solid var(--teal);border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.logo-dot::after{content:'';width:9px;height:9px;background:var(--teal);border-radius:50%;animation:pdot 2.5s ease-in-out infinite}
@keyframes pdot{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(.55);opacity:.5}}
nav{display:flex;align-items:center;gap:.15rem;flex-wrap:wrap}
.nb{font-size:.82rem;font-weight:500;color:var(--ink-mid);padding:.38rem .72rem;border-radius:var(--r);border:none;background:none;transition:background .15s,color .15s}
.nb:hover{background:var(--teal-wash);color:var(--teal-dk)}
.nb-cta{background:var(--coral);color:var(--white)!important;padding:.42rem .9rem;border-radius:var(--r);font-weight:600;margin-left:.35rem;transition:background .15s,transform .1s}
.nb-cta:hover{background:var(--coral-dk);transform:translateY(-1px)}

/* HERO */
.hero-wrap{background:linear-gradient(135deg,var(--teal-wash) 0%,#DDF2EF 100%);border-bottom:1px solid var(--border)}
.hero{max-width:1200px;margin:0 auto;padding:5rem 2rem 4rem;display:grid;grid-template-columns:1fr 360px;gap:4rem;align-items:center}
.eyebrow{font-family:var(--ff-m);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--teal);margin-bottom:.9rem}
.hero h1{font-family:var(--ff-d);font-size:clamp(2rem,4vw,3rem);line-height:1.13;color:var(--ink);margin-bottom:1.1rem}
.hero h1 em{color:var(--teal);font-style:italic}
.hero-sub{font-size:1rem;color:var(--ink-mid);max-width:490px;margin-bottom:2rem;line-height:1.72}
.hero-btns{display:flex;gap:1rem;flex-wrap:wrap}
.btn-p{background:var(--teal);color:var(--white);padding:.78rem 1.65rem;border-radius:var(--r);font-weight:600;font-size:.93rem;border:none;transition:background .15s,transform .1s,box-shadow .15s;box-shadow:0 2px 12px rgba(13,155,140,.28)}
.btn-p:hover{background:var(--teal-dk);transform:translateY(-2px);box-shadow:0 4px 20px rgba(13,155,140,.33)}
.btn-s{background:transparent;color:var(--teal-dk);padding:.78rem 1.65rem;border-radius:var(--r);font-weight:600;font-size:.93rem;border:2px solid var(--teal);transition:all .15s}
.btn-s:hover{background:var(--teal);color:var(--white)}

/* BREATH RING */
.ring-wrap{display:flex;align-items:center;justify-content:center;position:relative}
.ring-wrap svg{overflow:visible}
.r1{animation:ra 4s ease-in-out infinite;transform-origin:center}
.r2{animation:rb 4s ease-in-out infinite .3s;transform-origin:center}
.r3{animation:rc 4s ease-in-out infinite .6s;transform-origin:center}
.r4{animation:rd 4s ease-in-out infinite .9s;transform-origin:center}
@keyframes ra{0%,100%{transform:scale(1);opacity:.14}50%{transform:scale(1.18);opacity:.07}}
@keyframes rb{0%,100%{transform:scale(1);opacity:.24}50%{transform:scale(1.12);opacity:.16}}
@keyframes rc{0%,100%{transform:scale(1);opacity:.38}50%{transform:scale(1.07);opacity:.28}}
@keyframes rd{0%,100%{transform:scale(1)}50%{transform:scale(.87)}}
.ring-lbl{position:absolute;text-align:center;pointer-events:none}
.ring-lbl span:first-child{font-family:var(--ff-m);font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;color:var(--teal);display:block;margin-bottom:.2rem}
.ring-lbl span:last-child{font-family:var(--ff-d);font-size:1.45rem;color:var(--teal-dk)}

/* TRUST BAR */
.trust-bar{background:var(--white);border-bottom:1px solid var(--border);padding:.8rem 2rem}
.trust-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;gap:2rem;flex-wrap:wrap;justify-content:center}
.ti{display:flex;align-items:center;gap:.38rem;font-size:.76rem;color:var(--ink-lt);font-weight:500}

/* GENERIC SECTION */
section{padding:3.5rem 2rem}
.container{max-width:1200px;margin:0 auto}
.sec-ey{font-family:var(--ff-m);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--teal);margin-bottom:.45rem}
.sec-title{font-family:var(--ff-d);font-size:clamp(1.5rem,3vw,2.1rem);color:var(--ink);margin-bottom:.6rem;line-height:1.2}
.sec-sub{color:var(--ink-mid);font-size:.93rem;max-width:530px;line-height:1.7}
.sec-hd{margin-bottom:2.2rem}
.divider{border:none;border-top:1px solid var(--border);margin:0}

/* FEATURED REVIEW BANNER */
.feat-rev{background:linear-gradient(135deg,var(--teal-dk) 0%,#0A8A7B 100%);border-radius:14px;padding:2.2rem;color:var(--white);display:grid;grid-template-columns:1fr auto;gap:2rem;align-items:center;margin-bottom:2rem;cursor:pointer;transition:transform .2s,box-shadow .2s;position:relative;overflow:hidden}
.feat-rev::before{content:'';position:absolute;right:-50px;top:-50px;width:200px;height:200px;border:35px solid rgba(255,255,255,.05);border-radius:50%}
.feat-rev:hover{transform:translateY(-3px);box-shadow:0 8px 40px rgba(7,112,106,.35)}
.badge{background:var(--coral);color:var(--white);font-family:var(--ff-m);font-size:.64rem;letter-spacing:.1em;text-transform:uppercase;padding:.26rem .68rem;border-radius:20px;display:inline-block;margin-bottom:.65rem}
.feat-rev h2{font-family:var(--ff-d);font-size:1.5rem;line-height:1.2;margin-bottom:.65rem}
.feat-rev p{opacity:.84;font-size:.87rem;line-height:1.65;max-width:450px;margin-bottom:1.15rem}
.feat-stats{display:flex;gap:1.2rem;flex-wrap:wrap}
.fstat{text-align:center;background:rgba(255,255,255,.12);padding:.65rem 1.05rem;border-radius:var(--r);min-width:82px}
.fstat-v{font-family:var(--ff-m);font-size:1.2rem;font-weight:500;display:block}
.fstat-l{font-size:.66rem;opacity:.75;text-transform:uppercase;letter-spacing:.06em}
.feat-arr{font-size:1.75rem;opacity:.4}

/* TOPIC GRID */
.topics{display:grid;grid-template-columns:repeat(auto-fill,minmax(165px,1fr));gap:.85rem}
.topic{background:var(--teal-wash);border:1px solid var(--border);border-radius:10px;padding:1.05rem;cursor:pointer;transition:all .15s;text-align:center}
.topic:hover{background:var(--teal-lt);border-color:var(--teal);transform:translateY(-2px)}
.t-icon{font-size:1.6rem;margin-bottom:.4rem}
.t-name{font-size:.83rem;font-weight:600;color:var(--ink);margin-bottom:.13rem}
.t-count{font-size:.7rem;color:var(--ink-lt)}

/* ARTICLE CARDS */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:1.35rem}
.card{background:var(--white);border:1px solid var(--border);border-radius:12px;overflow:hidden;cursor:pointer;transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-md)}
.card-thumb{height:160px;display:flex;align-items:center;justify-content:center;font-size:3rem;position:relative;overflow:hidden}
.card-body{padding:1.25rem}
.card-tag{font-family:var(--ff-m);font-size:.64rem;letter-spacing:.1em;text-transform:uppercase;color:var(--teal);margin-bottom:.42rem;display:block}
.card-rule{width:28px;height:2px;background:var(--teal);border-radius:2px;margin-bottom:.65rem}
.card h3{font-family:var(--ff-d);font-size:1.07rem;line-height:1.27;color:var(--ink);margin-bottom:.5rem}
.card p{font-size:.83rem;color:var(--ink-mid);line-height:1.6;margin-bottom:.85rem}
.card-meta{font-size:.71rem;color:var(--ink-lt);display:flex;gap:.85rem}

/* NEWSLETTER */
.nl-sec{background:var(--teal-wash);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.nl-inner{max-width:510px;margin:0 auto;text-align:center}
.nl-inner h2{font-family:var(--ff-d);font-size:1.65rem;margin-bottom:.45rem}
.nl-inner p{color:var(--ink-mid);margin-bottom:1.35rem;font-size:.93rem}
.nl-form{display:flex;gap:.65rem;max-width:390px;margin:0 auto}
.nl-form input{flex:1;padding:.68rem .88rem;border:1.5px solid var(--border);border-radius:var(--r);font-family:var(--ff-b);font-size:.86rem;outline:none;transition:border-color .15s}
.nl-form input:focus{border-color:var(--teal)}
.nl-form button{background:var(--teal);color:var(--white);border:none;padding:.68rem 1.05rem;border-radius:var(--r);font-weight:600;font-size:.84rem;cursor:pointer;white-space:nowrap;transition:background .15s}
.nl-form button:hover{background:var(--teal-dk)}
.nl-note{font-size:.71rem;color:var(--ink-lt);margin-top:.6rem}

/* FOOTER */
footer{background:var(--ink);color:rgba(255,255,255,.7);padding:3rem 2rem 1.5rem}
.foot-grid{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:2rem;margin-bottom:2.2rem}
.foot-logo{font-family:var(--ff-d);font-size:1.15rem;color:var(--white);margin-bottom:.65rem}
.foot-tag{font-size:.81rem;line-height:1.6;max-width:220px}
.foot-col h4{color:var(--white);font-size:.73rem;font-weight:600;letter-spacing:.07em;text-transform:uppercase;margin-bottom:.85rem}
.foot-col a{display:block;color:rgba(255,255,255,.58);font-size:.81rem;margin-bottom:.42rem;cursor:pointer;transition:color .15s}
.foot-col a:hover{color:var(--white)}
.foot-bottom{max-width:1200px;margin:0 auto;padding-top:1.35rem;border-top:1px solid rgba(255,255,255,.1);font-size:.71rem;color:rgba(255,255,255,.38);display:flex;justify-content:space-between;align-items:flex-start;gap:1rem;flex-wrap:wrap}
.foot-disc{max-width:660px;line-height:1.65}

/* ARTICLE HERO */
.art-hero{background:linear-gradient(135deg,var(--teal-wash) 0%,#E4F5F2 100%);padding:2.65rem 2rem 2.15rem;border-bottom:1px solid var(--border)}
.art-hero-inner{max-width:740px;margin:0 auto}
.art-tag{font-family:var(--ff-m);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--teal);margin-bottom:.65rem;display:block}
.art-hero h1{font-family:var(--ff-d);font-size:clamp(1.65rem,3.5vw,2.35rem);line-height:1.15;color:var(--ink);margin-bottom:.85rem}
.art-meta{display:flex;align-items:center;gap:1.35rem;font-size:.76rem;color:var(--ink-lt);flex-wrap:wrap}

/* ARTICLE LAYOUT */
.art-layout{max-width:1060px;margin:0 auto;display:grid;grid-template-columns:1fr 285px;gap:2.65rem;padding:2.65rem 2rem}
.art-body{min-width:0}
.art-body h2{font-family:var(--ff-d);font-size:1.42rem;color:var(--ink);margin:2.35rem 0 .65rem;padding-top:.45rem;border-top:2px solid var(--teal-lt)}
.art-body h3{font-size:1.02rem;font-weight:600;color:var(--ink);margin:1.55rem 0 .42rem}
.art-body p{color:var(--ink-mid);line-height:1.82;margin-bottom:1rem;font-size:.97rem}
.art-body ul,.art-body ol{color:var(--ink-mid);padding-left:1.4rem;margin-bottom:1rem;line-height:1.8}
.art-body li{margin-bottom:.36rem}
.art-body strong{color:var(--ink);font-weight:600}
.art-body a{color:var(--teal);font-weight:500}
.art-body a:hover{color:var(--teal-dk)}

/* CALLOUT */
.callout{background:var(--teal-wash);border-left:4px solid var(--teal);border-radius:0 var(--r) var(--r) 0;padding:1.05rem 1.35rem;margin:1.55rem 0}
.callout p{margin:0;font-size:.92rem}
.c-lbl{font-family:var(--ff-m);font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;color:var(--teal);display:block;margin-bottom:.32rem}

/* IMAGE BLOCK */
.art-img{border-radius:10px;overflow:hidden;margin:1.65rem 0;background:linear-gradient(135deg,var(--teal-wash),var(--teal-lt));padding:2.5rem;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:.65rem;border:1px solid var(--border)}
.art-img-icon{font-size:3rem}
.art-img-cap{font-size:.75rem;color:var(--ink-lt);text-align:center;font-style:italic}

/* CTA BLOCK */
.cta-block{background:var(--teal-wash);border:2px solid var(--teal);border-radius:12px;padding:1.6rem;text-align:center;margin:2rem 0}
.cta-block h3{font-family:var(--ff-d);font-size:1.22rem;color:var(--ink);margin-bottom:.42rem}
.cta-block p{color:var(--ink-mid);font-size:.87rem;margin-bottom:1.1rem}
.btn-cta{display:inline-block;background:var(--coral);color:var(--white);padding:.82rem 2.15rem;border-radius:var(--r);font-weight:700;font-size:.95rem;cursor:pointer;border:none;transition:background .15s,transform .1s;box-shadow:0 4px 16px rgba(255,107,53,.28)}
.btn-cta:hover{background:var(--coral-dk);transform:translateY(-2px)}
.cta-note{font-size:.71rem;color:var(--ink-lt);margin-top:.52rem}

/* SIDEBAR */
.sidebar{position:sticky;top:80px;align-self:start}
.sb-card{background:var(--white);border:1.5px solid var(--border);border-radius:12px;padding:1.35rem;margin-bottom:1.1rem}
.sb-card h4{font-family:var(--ff-d);font-size:.95rem;color:var(--ink);margin-bottom:.65rem}
.sb-card p{font-size:.81rem;color:var(--ink-mid);margin-bottom:.85rem;line-height:1.65}
.sb-aff{background:linear-gradient(135deg,var(--teal-dk),#0A8A7B);color:var(--white);border:none}
.sb-aff h4{color:var(--white)}
.sb-aff p{color:rgba(255,255,255,.82)}
.stars{color:#F59E0B;font-size:.92rem;margin-bottom:.35rem}
.sb-row{display:flex;justify-content:space-between;font-size:.74rem;padding:.35rem 0;border-bottom:1px solid rgba(255,255,255,.12);color:rgba(255,255,255,.84)}
.sb-row:last-of-type{border-bottom:none}
.sb-row span:first-child{opacity:.7}
.sb-row span:last-child{font-weight:600}
.rel-lnk{display:flex;align-items:flex-start;gap:.6rem;padding:.52rem 0;border-bottom:1px solid var(--border);cursor:pointer;transition:color .15s;font-size:.81rem;color:var(--ink-mid)}
.rel-lnk:last-child{border-bottom:none}
.rel-lnk:hover{color:var(--teal)}
.rel-icon{font-size:.9rem;flex-shrink:0;margin-top:.1rem}
.btn-aff{display:block;background:var(--coral);color:var(--white);text-align:center;padding:.65rem .95rem;border-radius:var(--r);font-weight:600;font-size:.83rem;cursor:pointer;transition:background .15s,transform .1s;border:none;width:100%}
.btn-aff:hover{background:var(--coral-dk);transform:translateY(-1px)}
.aff-note{font-size:.66rem;opacity:.52;text-align:center;margin-top:.52rem}

/* REVIEW SPECIFICS */
.verdict-box{background:linear-gradient(135deg,var(--teal-dk),#0A8A7B);color:var(--white);border-radius:14px;padding:1.8rem;margin:2rem 0}
.verdict-box h3{font-family:var(--ff-d);font-size:1.22rem;color:var(--white);margin-bottom:.85rem}
.vgrid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.vcol h4{font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;opacity:.68;margin-bottom:.42rem}
.vcol ul{list-style:none;padding:0;font-size:.83rem;line-height:1.75;opacity:.88}
.pros li::before{content:'✓ ';color:#6EE7B7}
.cons li::before{content:'✗ ';color:#FCA5A5}
.score-box{text-align:center;background:rgba(255,255,255,.12);border-radius:10px;padding:1.1rem;margin-bottom:.85rem}
.score-val{font-family:var(--ff-d);font-size:2.5rem;color:var(--white);line-height:1}
.score-lbl{font-size:.7rem;opacity:.68;margin-top:.2rem;text-transform:uppercase;letter-spacing:.08em}
.ing-table{width:100%;border-collapse:collapse;margin:1rem 0;font-size:.84rem}
.ing-table th{background:var(--teal-wash);font-size:.71rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--teal-dk);padding:.52rem .82rem;text-align:left;border-bottom:2px solid var(--border)}
.ing-table td{padding:.58rem .82rem;color:var(--ink-mid);border-bottom:1px solid var(--border);vertical-align:top;line-height:1.58}
.ing-table tr:last-child td{border-bottom:none}

/* BACK BTN */
.back-btn{display:inline-flex;align-items:center;gap:.35rem;font-size:.81rem;color:var(--teal);font-weight:500;cursor:pointer;padding:.42rem 0;border:none;background:none;transition:gap .15s;margin-bottom:.85rem}
.back-btn:hover{gap:.58rem}

/* PILLAR TOC */
.toc{background:var(--teal-wash);border:1px solid var(--border);border-radius:12px;padding:1.5rem;margin:1.65rem 0}
.toc-title{font-family:var(--ff-m);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--teal);margin-bottom:.85rem;display:block}
.toc ol{padding-left:1.3rem;color:var(--ink-mid);font-size:.88rem;line-height:1.8}
.toc li{margin-bottom:.22rem}
.toc a{color:var(--teal);font-weight:500}

/* AMAZON PRODUCT BOX */
.amz-box{background:var(--white);border:1.5px solid var(--border);border-radius:12px;padding:1.25rem;margin:1.75rem 0;display:flex;gap:1.25rem;align-items:flex-start}
.amz-box-icon{font-size:2.2rem;flex-shrink:0}
.amz-box-body{flex:1;min-width:0}
.amz-box-label{font-family:var(--ff-m);font-size:.64rem;letter-spacing:.1em;text-transform:uppercase;color:var(--teal);margin-bottom:.32rem;display:block}
.amz-box-title{font-weight:600;font-size:.95rem;color:var(--ink);margin-bottom:.35rem}
.amz-box-desc{font-size:.82rem;color:var(--ink-mid);line-height:1.6;margin-bottom:.75rem}
.amz-box-stars{color:#F59E0B;font-size:.82rem;margin-bottom:.65rem}
.btn-amz{display:inline-block;background:#FF9900;color:#111;padding:.52rem 1.15rem;border-radius:var(--r);font-weight:700;font-size:.82rem;cursor:pointer;border:none;transition:background .15s;text-decoration:none}
.btn-amz:hover{background:#e68a00;color:#111}
.amz-disc{font-size:.66rem;color:var(--ink-lt);margin-top:.45rem}

/* RESPONSIVE */
@media(max-width:900px){
  .hero{grid-template-columns:1fr}
  .ring-wrap{display:none}
  .foot-grid{grid-template-columns:1fr 1fr}
  .art-layout{grid-template-columns:1fr;padding:2rem 1rem}
  .sidebar{position:static}
  .feat-rev{grid-template-columns:1fr}
  .feat-arr{display:none}
  .vgrid{grid-template-columns:1fr}
}
@media(max-width:600px){
  header{padding:0 1rem}
  nav .nb:not(.nb-cta){display:none}
  section{padding:2.25rem 1rem}
  .hero{padding:2.5rem 1rem 2rem}
  .foot-grid{grid-template-columns:1fr}
  .nl-form{flex-direction:column}
  .cards{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}