/* =====================================================
   Oreasons — Bathtub Replacement Blog
   Theme: Hydro-Fusion (Cyan / Magenta / Amber / Mint)
   ===================================================== */

:root{
  --bg-0:#050814;
  --bg-1:#0a0f25;
  --bg-2:#12092e;
  --ink:#eaf4f4;
  --ink-dim:#a9b8c9;
  --ink-faint:#6a7a92;
  --cyan:#00e5ff;
  --magenta:#ff00aa;
  --violet:#7b61ff;
  --amber:#ffbe0b;
  --mint:#8affc4;
  --coral:#ff6b6b;
  --glass:rgba(255,255,255,0.05);
  --glass-strong:rgba(255,255,255,0.09);
  --stroke:rgba(255,255,255,0.12);
  --shadow-lg: 0 30px 80px -20px rgba(0,229,255,0.25),
               0 20px 60px -10px rgba(255,0,170,0.2);
  --radius-s:10px;
  --radius-m:18px;
  --radius-l:28px;
  --ease:cubic-bezier(.2,.8,.2,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:100px}
body{
  font-family:'Space Grotesk', system-ui, -apple-system, sans-serif;
  font-size:17px;line-height:1.7;
  color:var(--ink);
  background:
    radial-gradient(1200px 800px at 10% -10%, rgba(123,97,255,0.18), transparent 60%),
    radial-gradient(1000px 800px at 110% 10%, rgba(255,0,170,0.15), transparent 60%),
    radial-gradient(900px 700px at 50% 110%, rgba(0,229,255,0.12), transparent 60%),
    linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 40%, var(--bg-2) 100%);
  min-height:100vh;overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

a{color:inherit;text-decoration:none}
img,svg{max-width:100%;display:block}

/* ============ ANIMATED BACKGROUND ============ */
.bg-particles{
  position:fixed;inset:0;pointer-events:none;z-index:0;overflow:hidden;
}
.bg-grid{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(0,229,255,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,0.06) 1px, transparent 1px);
  background-size:60px 60px;
  mask-image:radial-gradient(ellipse at center, rgba(0,0,0,0.9), transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse at center, rgba(0,0,0,0.9), transparent 75%);
}
.bg-orb{
  position:fixed;border-radius:50%;filter:blur(80px);opacity:.55;z-index:0;
  pointer-events:none;
}
.orb-1{width:500px;height:500px;background:var(--cyan);top:-150px;left:-100px;animation:float 18s var(--ease) infinite}
.orb-2{width:400px;height:400px;background:var(--magenta);bottom:-100px;right:-100px;animation:float 22s var(--ease) infinite reverse}
.orb-3{width:350px;height:350px;background:var(--violet);top:50%;left:45%;animation:float 26s var(--ease) infinite}
@keyframes float{
  0%,100%{transform:translate(0,0) scale(1)}
  33%{transform:translate(40px,-60px) scale(1.1)}
  66%{transform:translate(-50px,40px) scale(.95)}
}

/* ============ NAVIGATION ============ */
.nav-wrap{
  position:sticky;top:0;z-index:100;
  backdrop-filter:blur(20px) saturate(180%);
  -webkit-backdrop-filter:blur(20px) saturate(180%);
  background:rgba(5,8,20,0.55);
  border-bottom:1px solid var(--stroke);
}
.nav{
  max-width:1280px;margin:0 auto;padding:18px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.brand{display:flex;align-items:center;gap:12px;font-weight:700;font-size:1.15rem}
.brand-icon{width:36px;height:36px}
.brand span{
  background:linear-gradient(90deg, var(--cyan), var(--magenta));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.nav-links{list-style:none;display:flex;gap:6px;align-items:center}
.nav-links a{
  padding:8px 14px;border-radius:10px;font-size:.95rem;color:var(--ink-dim);
  transition:all .3s var(--ease);
}
.nav-links a:hover{color:var(--ink);background:var(--glass)}
.nav-cta{
  background:linear-gradient(135deg, var(--cyan), var(--magenta)) !important;
  color:#000 !important;font-weight:600 !important;
  box-shadow:0 8px 20px -6px rgba(0,229,255,.5);
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 12px 28px -6px rgba(255,0,170,.5)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;flex-direction:column;gap:5px}
.nav-toggle span{width:24px;height:2px;background:var(--ink);transition:.3s}

/* ============ HERO ============ */
.hero{
  position:relative;z-index:1;
  min-height:100vh;padding:60px 24px 80px;
  display:flex;align-items:center;justify-content:center;
  overflow:hidden;
}
.hero-scene{
  position:relative;width:100%;max-width:1200px;
  min-height:600px;
  display:grid;place-items:center;
  perspective:1200px;
}
.scene-grid{
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(0,229,255,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,0.08) 1px, transparent 1px);
  background-size:40px 40px;
  mask-image:radial-gradient(ellipse at center, rgba(0,0,0,1), transparent 70%);
  -webkit-mask-image:radial-gradient(ellipse at center, rgba(0,0,0,1), transparent 70%);
  transform:perspective(800px) rotateX(55deg) translateY(100px) scale(1.4);
  animation:gridPulse 6s ease-in-out infinite;
}
@keyframes gridPulse{
  0%,100%{opacity:.4}
  50%{opacity:.7}
}

/* Rings */
.ring{
  position:absolute;border-radius:50%;border:1px solid transparent;
  pointer-events:none;
}
.ring-1{
  width:600px;height:600px;
  border-image:linear-gradient(135deg, var(--cyan), transparent 50%, var(--magenta)) 1;
  border-style:solid;border-width:2px;border-radius:50%;
  border:2px solid;
  border-image:linear-gradient(135deg, var(--cyan), var(--magenta)) 1;
  animation:spin 22s linear infinite;
  opacity:.7;
}
.ring-2{
  width:450px;height:450px;
  border:2px dashed var(--violet);
  animation:spinR 18s linear infinite;
  opacity:.6;
}
.ring-3{
  width:320px;height:320px;
  border:1px solid var(--amber);
  animation:spin 14s linear infinite;
  opacity:.5;
}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes spinR{to{transform:rotate(-360deg)}}

/* 3D Tub */
.tub-3d{
  position:relative;width:480px;max-width:90vw;
  transform-style:preserve-3d;
  animation:floatTub 8s ease-in-out infinite;
  z-index:3;
}
@keyframes floatTub{
  0%,100%{transform:translateY(0) rotateY(0) rotateX(0)}
  50%{transform:translateY(-12px) rotateY(4deg) rotateX(2deg)}
}
.tub-svg{width:100%;height:auto;filter:drop-shadow(0 20px 40px rgba(0,229,255,0.35))}
.tub-water{animation:waterShimmer 4s ease-in-out infinite}
@keyframes waterShimmer{
  0%,100%{opacity:.45;transform:translateX(0)}
  50%{opacity:.7;transform:translateX(4px)}
}
.tub-drop{animation:dropFall 2.5s ease-in infinite}
.drop-2{animation-delay:.6s}
@keyframes dropFall{
  0%{transform:translate(0,0);opacity:1}
  80%{opacity:1}
  100%{transform:translate(0,100px);opacity:0}
}
.steam{animation:steamRise 3.5s ease-out infinite}
.steam-2{animation-delay:1.1s}
.steam-3{animation-delay:2.2s}
@keyframes steamRise{
  0%{transform:translateY(10px);opacity:0}
  30%{opacity:.5}
  100%{transform:translateY(-30px);opacity:0}
}

/* Floating tools */
.tool{
  position:absolute;width:56px;height:56px;z-index:2;
  background:var(--glass);border:1px solid var(--stroke);
  border-radius:16px;display:grid;place-items:center;
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  box-shadow:0 15px 40px -10px rgba(0,0,0,.4);
  animation:toolFloat 6s ease-in-out infinite;
}
.tool svg{width:28px;height:28px}
.tool-wrench{top:10%;left:10%;animation-delay:0s}
.tool-tile{top:15%;right:10%;animation-delay:1.5s}
.tool-drop{bottom:20%;left:12%;animation-delay:3s}
.tool-spark{bottom:18%;right:12%;animation-delay:4.5s}
@keyframes toolFloat{
  0%,100%{transform:translateY(0) rotate(-3deg)}
  50%{transform:translateY(-20px) rotate(3deg)}
}

/* Hero copy */
.hero-copy{
  position:relative;z-index:5;text-align:center;
  margin-top:40px;max-width:860px;padding:0 12px;
}
.hero-tag{
  display:inline-flex;align-items:center;gap:10px;
  padding:8px 18px;border-radius:999px;
  background:var(--glass-strong);border:1px solid var(--stroke);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  font-size:.85rem;color:var(--ink-dim);letter-spacing:.08em;text-transform:uppercase;
  margin-bottom:20px;
}
.dot{width:8px;height:8px;border-radius:50%;background:var(--mint);box-shadow:0 0 12px var(--mint);animation:pulse 2s ease-in-out infinite}
@keyframes pulse{50%{opacity:.5;transform:scale(.85)}}
.hero-title{
  font-size:clamp(2.2rem, 6vw, 4.5rem);
  line-height:1.05;letter-spacing:-.03em;font-weight:700;
  margin-bottom:20px;
}
.grad-word{
  background:linear-gradient(90deg, var(--cyan) 0%, var(--mint) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.grad-word-2{
  background:linear-gradient(90deg, var(--magenta) 0%, var(--amber) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{font-size:clamp(1rem, 2vw, 1.2rem);color:var(--ink-dim);max-width:680px;margin:0 auto 32px}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{
  padding:14px 28px;border-radius:14px;font-weight:600;font-size:.98rem;
  display:inline-flex;align-items:center;gap:8px;transition:all .3s var(--ease);
  cursor:pointer;border:none;
}
.btn-primary{
  background:linear-gradient(135deg, var(--cyan), var(--magenta));
  color:#000;box-shadow:0 12px 30px -8px rgba(0,229,255,.5);
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 18px 40px -8px rgba(255,0,170,.6)}
.btn-ghost{
  background:var(--glass-strong);border:1px solid var(--stroke);
  color:var(--ink);backdrop-filter:blur(10px);
}
.btn-ghost:hover{background:var(--glass-strong);border-color:var(--cyan);transform:translateY(-3px)}

.hero-stats{
  position:absolute;bottom:20px;left:50%;transform:translateX(-50%);
  display:flex;gap:32px;z-index:5;
  padding:16px 28px;border-radius:var(--radius-m);
  background:var(--glass);border:1px solid var(--stroke);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.stat{text-align:center}
.stat .num{
  display:block;font-size:1.4rem;font-weight:700;
  background:linear-gradient(135deg, var(--amber), var(--coral));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.stat .lbl{font-size:.78rem;color:var(--ink-faint);letter-spacing:.05em}

/* ============ LAYOUT ============ */
.wrap{position:relative;z-index:1;max-width:1280px;margin:0 auto;padding:60px 24px 80px}
.grid-layout{
  display:grid;grid-template-columns:280px 1fr;gap:40px;align-items:start;
}

/* TOC */
.toc{position:sticky;top:100px;align-self:start;z-index:10}
.toc-card{
  background:var(--glass);border:1px solid var(--stroke);
  border-radius:var(--radius-l);padding:22px;
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  box-shadow:var(--shadow-lg);
}
.toc-header{
  display:flex;align-items:center;gap:10px;
  font-weight:600;color:var(--ink);margin-bottom:16px;
  padding-bottom:12px;border-bottom:1px solid var(--stroke);
}
.toc-toggle{display:none}
.toc-list{list-style:none;display:flex;flex-direction:column;gap:4px}
.toc-list a{
  display:block;padding:8px 12px;border-radius:8px;
  font-size:.9rem;color:var(--ink-dim);
  border-left:2px solid transparent;
  transition:all .25s var(--ease);
}
.toc-list a:hover{color:var(--ink);background:var(--glass);border-left-color:var(--cyan)}
.toc-list a.active{
  color:var(--ink);background:var(--glass-strong);
  border-left-color:var(--magenta);
  box-shadow:inset 3px 0 0 -1px var(--cyan);
}

/* Article */
.article{min-width:0}
.article section{margin-bottom:56px;scroll-margin-top:100px}
.eyebrow{
  display:inline-block;padding:6px 14px;border-radius:999px;
  background:linear-gradient(90deg, rgba(0,229,255,0.15), rgba(255,0,170,0.15));
  border:1px solid var(--stroke);
  color:var(--cyan);font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;
  margin-bottom:16px;font-weight:600;
}
.intro-block h2{
  font-size:clamp(2rem, 4.5vw, 3rem);line-height:1.1;letter-spacing:-.02em;
  margin-bottom:24px;
}
.lead{font-size:1.15rem;color:var(--ink);margin-bottom:18px}
.article h2{
  font-size:clamp(1.7rem, 3.5vw, 2.4rem);
  line-height:1.2;margin:0 0 20px;letter-spacing:-.02em;
}
.article h3{
  font-size:1.25rem;margin:28px 0 10px;color:var(--ink);font-weight:600;
}
.article p{color:var(--ink-dim);margin-bottom:16px}
.article p a{
  color:var(--cyan);border-bottom:1px dashed var(--cyan);
  transition:all .2s;
}
.article p a:hover{color:var(--magenta);border-color:var(--magenta)}

.check-list{
  list-style:none;display:flex;flex-direction:column;gap:12px;
  padding:10px 0;
}
.check-list li{
  position:relative;padding-left:38px;color:var(--ink-dim);
}
.check-list li::before{
  content:'';position:absolute;left:0;top:6px;
  width:24px;height:24px;border-radius:50%;
  background:linear-gradient(135deg, var(--cyan), var(--magenta));
  mask:url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z" fill="black"/></svg>') center/14px no-repeat;
  -webkit-mask:url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z" fill="black"/></svg>') center/14px no-repeat;
}
.check-list li strong{color:var(--ink)}

/* Compare */
.compare-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:24px 0;
}
.compare-card{
  background:var(--glass);border:1px solid var(--stroke);
  border-radius:var(--radius-m);padding:24px;
  backdrop-filter:blur(12px);
}
.compare-card-primary{
  background:linear-gradient(135deg, rgba(0,229,255,0.12), rgba(255,0,170,0.12));
  border-color:rgba(0,229,255,0.3);
  box-shadow:var(--shadow-lg);
  transform:translateY(-4px);
}
.compare-head{font-size:1.2rem;margin-bottom:14px;font-weight:700}
.compare-repair{color:var(--coral)}
.compare-replace{
  background:linear-gradient(90deg, var(--cyan), var(--magenta));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.compare-card ul{list-style:none;display:flex;flex-direction:column;gap:8px}
.compare-card li{font-size:.92rem;color:var(--ink-dim);padding-left:20px;position:relative}
.compare-card li::before{
  content:'›';position:absolute;left:0;color:var(--amber);font-weight:700;
}

/* Process visual */
.process-visual{
  position:relative;margin:32px 0;padding:40px 20px;
  background:var(--glass);border:1px solid var(--stroke);
  border-radius:var(--radius-l);
  backdrop-filter:blur(12px);
  display:flex;justify-content:space-between;align-items:flex-start;gap:12px;
  flex-wrap:wrap;
  overflow:hidden;
}
.process-line{
  position:absolute;top:72px;left:40px;right:40px;height:2px;
  background:linear-gradient(90deg, var(--cyan), var(--magenta), var(--amber));
  z-index:0;
  background-size:200% 100%;
  animation:lineFlow 4s linear infinite;
}
@keyframes lineFlow{to{background-position:-200% 0}}
.process-stage{
  position:relative;z-index:1;text-align:center;flex:1;min-width:120px;
  opacity:.5;transition:all .4s var(--ease);
  cursor:default;
}
.process-stage.in-view{opacity:1}
.process-stage.active{opacity:1}
.stage-num{
  width:56px;height:56px;margin:0 auto 10px;border-radius:50%;
  background:var(--bg-1);border:2px solid var(--stroke);
  display:grid;place-items:center;font-weight:700;color:var(--cyan);
  transition:all .3s var(--ease);
}
.process-stage.active .stage-num{
  background:linear-gradient(135deg, var(--cyan), var(--magenta));
  color:#000;border-color:transparent;
  box-shadow:0 0 30px rgba(0,229,255,.6);
  transform:scale(1.15);
}
.stage-label{font-weight:600;color:var(--ink);font-size:.95rem}
.stage-desc{font-size:.8rem;color:var(--ink-faint);margin-top:4px}

.steps{padding-left:22px;display:flex;flex-direction:column;gap:12px}
.steps li{color:var(--ink-dim)}
.steps li strong{color:var(--ink)}
.steps li::marker{color:var(--magenta);font-weight:700}

/* Price grid */
.price-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:24px 0;
}
.price-card{
  background:var(--glass);border:1px solid var(--stroke);
  border-radius:var(--radius-m);padding:22px;
  backdrop-filter:blur(12px);
  transition:transform .3s var(--ease);
}
.price-card:hover{transform:translateY(-4px)}
.price-card-mid{border-color:rgba(0,229,255,0.3);background:linear-gradient(135deg, rgba(0,229,255,0.08), transparent)}
.price-card-top{border-color:rgba(255,0,170,0.3);background:linear-gradient(135deg, rgba(255,0,170,0.1), transparent)}
.price-label{font-size:.8rem;color:var(--ink-faint);letter-spacing:.08em;text-transform:uppercase;margin-bottom:8px}
.price-range{
  font-size:1.5rem;font-weight:700;margin-bottom:10px;
  background:linear-gradient(90deg, var(--cyan), var(--magenta));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.price-card p{font-size:.9rem;color:var(--ink-dim)}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:12px;margin-top:20px}
.faq-item{
  background:var(--glass);border:1px solid var(--stroke);
  border-radius:var(--radius-s);
  backdrop-filter:blur(12px);
  transition:border-color .3s;
}
.faq-item[open]{border-color:var(--cyan)}
.faq-item summary{
  padding:18px 22px;cursor:pointer;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:16px;
  font-weight:600;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:'+';font-size:1.5rem;color:var(--cyan);transition:transform .3s;font-weight:300;
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{padding:0 22px 18px;color:var(--ink-dim)}

/* CTA */
.cta-card{
  position:relative;margin-top:40px;
  background:linear-gradient(135deg, rgba(0,229,255,0.1), rgba(255,0,170,0.1));
  border:1px solid var(--stroke);
  border-radius:var(--radius-l);
  overflow:hidden;
}
.cta-inner{
  position:relative;padding:40px 32px;z-index:2;
  backdrop-filter:blur(16px);
}
.cta-deco{
  position:absolute;border-radius:50%;filter:blur(60px);opacity:.6;z-index:0;pointer-events:none;
}
.cta-deco-1{width:300px;height:300px;background:var(--cyan);top:-100px;right:-100px;animation:float 14s ease-in-out infinite}
.cta-deco-2{width:250px;height:250px;background:var(--magenta);bottom:-100px;left:-100px;animation:float 18s ease-in-out infinite reverse}
.cta-tag{
  display:inline-block;padding:6px 14px;border-radius:999px;
  background:rgba(0,0,0,0.4);border:1px solid var(--stroke);
  font-size:.78rem;color:var(--mint);letter-spacing:.12em;text-transform:uppercase;
  margin-bottom:16px;
}
.cta-title{font-size:clamp(1.6rem, 3vw, 2.2rem);margin-bottom:12px}
.cta-sub{color:var(--ink-dim);margin-bottom:28px;max-width:500px}
.cta-details{
  display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-bottom:24px;
}
.cta-item{
  display:flex;align-items:center;gap:14px;
  padding:14px 18px;border-radius:var(--radius-s);
  background:var(--glass-strong);border:1px solid var(--stroke);
  transition:all .3s var(--ease);
}
.cta-item:hover{border-color:var(--cyan);transform:translateY(-2px)}
.cta-item svg{color:var(--cyan);flex-shrink:0}
.cta-k{font-size:.72rem;color:var(--ink-faint);letter-spacing:.08em;text-transform:uppercase}
.cta-v{font-weight:600;color:var(--ink);font-size:.95rem}
.cta-socials{
  display:flex;gap:12px;margin-bottom:24px;
}
.cta-socials a{
  width:44px;height:44px;border-radius:50%;
  background:var(--glass-strong);border:1px solid var(--stroke);
  display:grid;place-items:center;color:var(--ink-dim);
  transition:all .3s var(--ease);
}
.cta-socials a:hover{color:#000;background:var(--cyan);border-color:var(--cyan);transform:translateY(-3px);box-shadow:0 10px 25px -5px rgba(0,229,255,.6)}
.cta-btn{width:100%;justify-content:center;font-size:1.05rem;padding:16px 28px}

/* Footer */
.foot{
  position:relative;z-index:1;
  border-top:1px solid var(--stroke);
  background:rgba(5,8,20,0.6);
  padding:30px 24px;text-align:center;
}
.foot p{color:var(--ink-dim);font-size:.9rem}
.foot-note{margin-top:8px;font-size:.78rem;color:var(--ink-faint)}

/* Focus */
a:focus-visible,button:focus-visible,summary:focus-visible{
  outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 960px){
  .grid-layout{grid-template-columns:1fr;gap:24px}
  .toc{position:relative;top:0}
  .toc-toggle{
    display:flex;align-items:center;justify-content:space-between;
    width:100%;background:var(--glass-strong);border:1px solid var(--stroke);
    padding:14px 18px;border-radius:var(--radius-s);color:var(--ink);
    cursor:pointer;font-weight:600;
  }
  .toc-header{display:none}
  .toc-list{display:none;margin-top:12px}
  .toc.open .toc-list{display:flex}
  .nav-toggle{display:flex}
  .nav-links{
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:4px;
    background:rgba(5,8,20,0.95);
    backdrop-filter:blur(20px);
    padding:16px;border-top:1px solid var(--stroke);
    display:none;
  }
  .nav.open .nav-links{display:flex}
  .nav-links a{padding:12px 14px;width:100%}
  .ring-1{width:450px;height:450px}
  .ring-2{width:340px;height:340px}
  .ring-3{width:240px;height:240px}
  .tool{width:46px;height:46px}
  .tool svg{width:22px;height:22px}
  .hero-stats{position:static;transform:none;margin:30px auto 0;justify-content:center}
}
@media (max-width: 640px){
  body{font-size:16px}
  .wrap{padding:40px 18px 60px}
  .hero{padding:40px 18px 60px;min-height:auto}
  .hero-scene{min-height:400px}
  .tub-3d{width:340px}
  .tool{display:none}
  .compare-grid{grid-template-columns:1fr}
  .price-grid{grid-template-columns:1fr}
  .cta-details{grid-template-columns:1fr}
  .hero-stats{gap:16px;padding:14px 20px}
  .stat .num{font-size:1.15rem}
  .ring-1{width:320px;height:320px}
  .ring-2{width:240px;height:240px}
  .ring-3{width:170px;height:170px}
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  html{scroll-behavior:auto}
}