/* ==========================================================================
   DANA ISOTONIC v3 — simple, robust rewrite
   Cans live inline inside each panel (normal document flow). No fixed
   overlay layers, no shared elements swapped via JS. Each section is
   self-contained, so nothing can silently fail to render.
   ========================================================================== */

:root{
  --bg:#f4f2ee;
  --ink:#141311;
  --panel-bg:#f4f2ee;
  --panel-ink:#141311;
  --cycling:#2fa8e0;
  --running:#9be000;
  --padel:#c13fd6;
  --ease:cubic-bezier(.16,.84,.44,1);
  --font-heading:'Climate Crisis', sans-serif;
  --font-display:'Open Sans', sans-serif;
  --font-text:'Inter', sans-serif;
}

*,*::before,*::after{ box-sizing:border-box; }

html{
  scroll-behavior:smooth;
  scroll-snap-type:y mandatory;
}

body{
  margin:0;
  font-family:var(--font-text);
  background:var(--panel-bg);
  color:var(--panel-ink);
  overflow-x:hidden;
  transition:background .6s var(--ease), color .6s var(--ease);
}

img{ display:block; max-width:100%; }

a{ color:inherit; text-decoration:none; }

/* ---------- film grain overlay ---------- */
.grain{
  position:fixed; inset:-12vh -12vw; z-index:9999; pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch' result='noise'/%3E%3CfeColorMatrix in='noise' type='matrix' values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.9 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size:160px 160px;
  opacity:.25;
  animation:grainShift .5s steps(4) infinite;
}
@keyframes grainShift{
  0%{ transform:translate(0,0); }
  25%{ transform:translate(-4%,3%); }
  50%{ transform:translate(3%,-4%); }
  75%{ transform:translate(-3%,-3%); }
  100%{ transform:translate(0,0); }
}
@media (prefers-reduced-motion:reduce){
  .grain{ animation:none; }
}

/* ---------- loader ---------- */
.loader{
  position:fixed; inset:0; z-index:999; background:var(--ink);
  display:flex; align-items:center; justify-content:center;
  transition:opacity .5s var(--ease), visibility .5s;
}
.loader-mark{ width:clamp(6rem,18vw,9rem); height:auto; }
.loader.is-hidden{ opacity:0; visibility:hidden; pointer-events:none; }

/* ---------- blurred color cursor ---------- */
.blob-cursor{
  position:fixed; top:0; left:0; width:420px; height:420px; z-index:1;
  border-radius:50%; pointer-events:none; filter:blur(70px); opacity:.35;
  background:radial-gradient(circle, var(--cycling), transparent 70%);
  transform:translate(-50%,-50%); transition:background 1s var(--ease);
  will-change:transform;
}
@media (hover:none),(pointer:coarse){ .blob-cursor{ display:none; } }

/* ---------- dot nav ---------- */
.dots-nav{
  position:fixed; right:2rem; top:50%; transform:translateY(-50%); z-index:60;
  display:flex; flex-direction:column; gap:.9rem;
}
.dots-nav span{
  width:8px; height:8px; border-radius:50%;
  background:var(--panel-ink); opacity:.25;
  transition:opacity .3s, transform .3s, background .5s;
  cursor:pointer;
}
.dots-nav span.is-active{ opacity:1; transform:scale(1.3); }
@media (max-width:720px){ .dots-nav{ display:none; } }

/* ---------- topbar ---------- */
.topbar{
  position:fixed; top:0; left:0; right:0; z-index:70;
  display:flex; align-items:center; justify-content:space-between;
  padding:1.6rem clamp(1.4rem,5vw,3rem);
}
.topbar-logo img{ width:clamp(4.2rem,9vw,5.4rem); height:auto; transition:opacity .3s; }
.topbar-burger{
  width:44px; height:44px; border:0; background:none; cursor:pointer;
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:6px;
}
.topbar-burger span{
  width:26px; height:2px; background:var(--panel-ink);
  transition:transform .35s var(--ease), opacity .3s, background .3s;
}
.topbar-burger.is-open span{ background:#f4f2ee; }
.topbar-burger.is-open span:nth-child(1){ transform:translateY(8px) rotate(45deg); }
.topbar-burger.is-open span:nth-child(2){ transform:translateY(-8px) rotate(-45deg); }

/* ---------- fly-out menu ---------- */
.fly-menu{
  position:fixed; inset:0; z-index:65; background:var(--ink);
  padding:clamp(2rem,8vw,6rem);
  overflow:hidden;
  clip-path:circle(0% at calc(100% - 3rem) 3rem);
  transition:clip-path .7s var(--ease);
}
.fly-menu.is-open{ clip-path:circle(150% at calc(100% - 3rem) 3rem); }
.fly-menu-bg{ position:absolute; inset:0; z-index:0; pointer-events:none; overflow:hidden; }
.fly-menu-bg-item{ position:absolute; height:auto; filter:blur(9px); opacity:.3; }
.fly-menu-bg-item--1{ width:min(42vw,420px); top:2%; left:-4%; transform:rotate(-14deg); }
.fly-menu-bg-item--2{ width:min(38vw,380px); bottom:-2%; right:-6%; transform:rotate(12deg); opacity:.26; }
.fly-menu-bg-item--3{ width:min(30vw,300px); top:46%; left:56%; transform:rotate(-7deg) translateY(-50%); opacity:.22; }
.fly-menu-links{
  position:relative; z-index:1; height:100%;
  display:flex; flex-direction:column; align-items:flex-start; justify-content:center; gap:1.2rem;
}
.fly-menu-links a{
  position:relative; z-index:1;
  display:block; width:100%;
  padding:.06em .3em;
  font-family:var(--font-display); font-weight:700; color:#f4f2ee;
  font-size:clamp(2rem,6vw,3.2rem); opacity:.85;
  transition:opacity .3s, color .18s var(--ease), transform .35s var(--ease), text-shadow .3s var(--ease);
}
.fly-menu-links a::before{
  content:''; position:absolute; z-index:-1; inset:0;
  background:var(--link-pop,#9be000);
  transform:scaleX(0); transform-origin:left center;
  transition:transform .4s cubic-bezier(.65,0,.35,1);
}
.fly-menu-links a:hover{
  opacity:1; color:#141311;
  transform:translateX(.14em) skewX(-4deg) scale(1.03);
  text-shadow:4px 4px 0 rgba(244,242,238,.18);
}
.fly-menu-links a:hover::before{ transform:scaleX(1); }
.fly-menu-links a:nth-child(1){ --link-pop:#f4f2ee; }
.fly-menu-links a:nth-child(2){ --link-pop:#2fa8e0; }
.fly-menu-links a:nth-child(3){ --link-pop:#9be000; }
.fly-menu-links a:nth-child(4){ --link-pop:#c13fd6; }
.fly-menu-links a:nth-child(5){ --link-pop:#ff5a36; }

/* ---------- panels ---------- */
.panel{
  position:relative;
  height:100vh;
  width:100%;
  scroll-snap-align:start;
  scroll-snap-stop:always;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  padding:6rem clamp(1.4rem,6vw,4rem) 3rem;
  text-align:center;
  overflow:hidden;
  background:var(--panel-bg);
}

.pop{ opacity:0; transform:translateY(28px); transition:opacity .7s var(--ease), transform .7s var(--ease); }
.panel.is-active .pop{ opacity:1; transform:translateY(0); }
.panel.is-active .pop:nth-of-type(1){ transition-delay:.05s; }
.panel.is-active .pop:nth-of-type(2){ transition-delay:.15s; }
.panel.is-active .pop:nth-of-type(3){ transition-delay:.25s; }
.panel.is-active .pop:nth-of-type(4){ transition-delay:.35s; }

/* ---------- hero ---------- */
.panel-hero{ background:var(--bg); }
.hero-bg-can{ position:absolute; inset:0; z-index:0; pointer-events:none; overflow:hidden; }
.hero-bg-can-item{ position:absolute; height:auto; filter:blur(14px); opacity:.25; }
.hero-bg-can-item--1{ width:min(42vw,420px); top:2%; left:0%; transform:rotate(-12deg); }
.hero-bg-can-item--2{ width:min(38vw,380px); bottom:-4%; right:2%; transform:rotate(10deg); }
.hero-bg-can-item--3{ width:min(30vw,280px); top:34%; left:58%; transform:rotate(-6deg); opacity:.25; }
.hero-content{ position:relative; z-index:1; }
.kicker{
  font-family:var(--font-display); font-weight:600; letter-spacing:.04em;
  text-transform:uppercase; font-size:clamp(.85rem,2vw,1rem); opacity:.65; margin-bottom:.8rem;
}
.mega{ margin:0; line-height:.92; font-family:var(--font-heading); font-weight:400; text-transform:uppercase; }
.mega-line{ display:block; font-size:clamp(2.2rem,8vw,7.5rem); }
.mega-outline{
  color:transparent; -webkit-text-stroke:2px var(--panel-ink);
}
.cta{
  display:inline-block; margin-top:2rem; padding:1.1rem 2.4rem; border-radius:999px;
  background:var(--panel-ink); color:var(--panel-bg);
  font-family:var(--font-display); font-weight:700; font-size:1rem;
  transition:transform .3s var(--ease), background .5s, color .5s;
}
.cta:hover{ transform:translateY(-3px); }
.credit-tag{
  position:absolute; bottom:1.4rem; left:50%; transform:translateX(-50%);
  font-size:.72rem; letter-spacing:.03em; opacity:.4;
}

/* ---------- intro ---------- */
.panel-intro{ background:var(--panel-bg); }
.intro-text{
  font-family:var(--font-display); font-weight:500;
  font-size:clamp(1.3rem,3.2vw,2.1rem); line-height:1.55;
  max-width:52ch; margin:0; opacity:.85;
}

/* ---------- statement ---------- */
.panel-statement{ background:var(--ink); color:#f4f2ee; }
.statement-text{
  font-family:var(--font-display); font-weight:700;
  font-size:clamp(1.7rem,5.2vw,3.2rem); line-height:1.2;
  max-width:45ch; margin:0 0 1.4rem;
}
.statement-text em{ font-style:normal; color:var(--running); }
.statement-sub{ max-width:40ch; opacity:.65; font-size:1rem; }

/* ---------- product panels ---------- */
.panel-product{ padding-top:5rem; padding-bottom:2rem; }

.product-bg-heading{
  position:absolute; top:50%; left:50%; transform:translate(-50%,-50%);
  font-family:var(--font-heading); font-weight:400; text-transform:uppercase;
  letter-spacing:-.02em; white-space:nowrap;
  font-size:clamp(3rem,16vw,12rem); line-height:1;
  color:var(--panel-ink); opacity:.07;
  pointer-events:none; z-index:0;
}

.product-can-wrap{
  position:relative; z-index:1;
  display:flex; align-items:center; justify-content:center;
  height:min(68vh,660px);
  margin-bottom:1.6rem;
}
.product-can{
  height:100%; width:auto;
  filter:drop-shadow(0 26px 30px rgba(0,0,0,.25));
  opacity:0;
  transform:translateY(50px) rotate(-8deg) scale(.92);
  transition:opacity .9s var(--ease), transform .9s var(--ease);
  will-change:transform;
}
.panel.is-active .product-can{
  opacity:1;
  transform:translateY(0) rotate(0deg) scale(1);
  animation:canIdle 6s ease-in-out .9s infinite;
}
@keyframes canIdle{
  0%,100%{ transform:translateY(0) rotate(-2.5deg); }
  50%{ transform:translateY(-12px) rotate(2.5deg); }
}

.product-copy{ position:relative; z-index:1; width:min(460px,84vw); }
.product-tag{
  display:block; font-family:var(--font-display); font-weight:700;
  font-size:.85rem; letter-spacing:.05em; text-transform:uppercase;
  color:var(--panel-accent,inherit); margin-bottom:.5rem; opacity:.7;
}
.product-copy p{ margin:0; font-size:1.05rem; line-height:1.5; opacity:.75; }

#panel-2{ --panel-accent:var(--cycling); }
#panel-3{ --panel-accent:var(--running); }
#panel-4{ --panel-accent:var(--padel); }

/* ---------- closing ---------- */
.panel-close{ background:var(--ink); color:#f4f2ee; }
.close-sub{ opacity:.6; margin:.6rem 0 0; }
.panel-close .cta{ background:#c13fd6; color:#f4f2ee; }
.foot-row{
  position:absolute; bottom:1.8rem; left:0; right:0;
  display:flex; align-items:center; justify-content:space-between;
  padding-inline:clamp(1.4rem,6vw,4rem); font-size:.82rem; color:rgba(244,242,238,.5);
}
.foot-social{ display:flex; gap:1.1rem; }
.foot-social a{ transition:color .3s; }
.foot-social a:hover{ color:#c13fd6; }

/* ---------- responsive ---------- */
@media (max-width:960px){
  .product-can-wrap{ height:min(50vh,480px); }
  .product-bg-heading{ font-size:clamp(2.2rem,13vw,5rem); }
  .hero-bg-can-item--1{ width:min(40vw,220px); }
  .hero-bg-can-item--2{ width:min(36vw,200px); }
  .hero-bg-can-item--3{ width:min(28vw,160px); }
}

@media (max-width:420px){
  .product-can-wrap{ height:min(42vh,360px); }
  .product-bg-heading{ font-size:clamp(1.6rem,13vw,2.4rem); }
  .mega-line{ font-size:clamp(1.9rem,9.5vw,3rem); }
  .statement-text{ font-size:clamp(1.4rem,6.5vw,1.9rem); }
  .cta{ padding:1rem 2rem; font-size:.9rem; }
}

@media (max-height:700px){
  .panel{ padding-top:4.5rem; padding-bottom:1.6rem; }
  .product-can-wrap{ height:min(36vh,300px); }
}

@media (prefers-reduced-motion:reduce){
  *{ animation-duration:.001ms !important; transition-duration:.001ms !important; scroll-behavior:auto !important; }
}