*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}

:root{
  /* Taken from the NISH product deck and the Modo product sheet: the wordmark
     navy, the teal dot that marks each slide title, and the flat light grey
     the deck uses behind every panel. */
  --brand:#1c3d78;
  --brand-dark:#142c58;
  --accent:#11ccd1;
  --brand-tint:#eef3fb;
  /* Neutrals */
  --ink:#15181a;
  --ink-mid:#4a5257;
  /* Not lighter than this: #79838a measured 3.87:1 on white, under the 4.5:1
     WCAG AA minimum, and it is used on the smallest text. */
  --ink-light:#687177;
  --line:#e2e5e8;
  --line-strong:#c9d0d4;
  --bg:#fff;
  --bg-alt:#efefef;      /* the deck's panel grey */
  --r:3px;
  --display:'DM Sans',system-ui,-apple-system,sans-serif;
}

body{font-family:'DM Sans',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;}
img{max-width:100%;height:auto;}
[id]{scroll-margin-top:100px;}

/* ============ NAV ============ */
.nav-wrap{position:sticky;top:0;z-index:200;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);}
.nav-wrap nav{max-width:1240px;margin:0 auto;height:76px;padding:0 48px;display:flex;align-items:center;justify-content:space-between;gap:24px;}
/* There is no logo file yet - the brand is set type, with the deck's teal dot
   as the only mark. Replace both together when artwork exists. */
.nav-brand{display:flex;align-items:center;gap:8px;text-decoration:none;flex-shrink:0;font-family:var(--display);font-size:21px;font-weight:700;color:var(--brand);letter-spacing:-.03em;line-height:1;}
.brand-mark{position:relative;padding-right:9px;}
.brand-dot{position:absolute;top:-1px;right:0;width:6px;height:6px;border-radius:50%;background:var(--accent);}
.brand-word{font-weight:600;color:var(--ink);}
.nav-links{display:flex;gap:1px;align-items:center;list-style:none;}
.nav-links a{color:var(--ink-mid);text-decoration:none;font-size:14px;font-weight:500;padding:8px 12px;border-radius:var(--r);transition:color .15s,background .15s;}
.nav-links a:hover{color:var(--ink);background:var(--bg-alt);}
.nav-cta{color:var(--brand)!important;font-weight:600!important;border:1px solid var(--line-strong);margin-left:8px;}
.nav-cta:hover{border-color:var(--brand);background:var(--brand-tint)!important;}

.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;background:none;border:none;cursor:pointer;padding:8px;margin:0;}
.nav-toggle span{width:23px;height:2px;background:var(--ink);transition:transform .2s ease,opacity .2s ease;}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ============ HERO ============ */
/* Copy left, the walk-around clip right. The clip is portrait because it was
   shot that way; framing it rather than cropping it keeps the whole chair. */
.hero{background:var(--bg-alt);padding:0;overflow:hidden;}
.hero-inner{max-width:1240px;margin:0 auto;padding:56px 48px;display:grid;grid-template-columns:1fr 1.02fr;gap:40px;align-items:center;min-height:min(82vh, 780px);}
.hero-eye{display:flex;align-items:center;gap:11px;font-size:17px;font-weight:400;color:var(--brand);margin-bottom:14px;}
.hero-eye::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--accent);flex-shrink:0;}
.hero-name{font-family:var(--display);font-size:clamp(60px,7.6vw,104px);font-weight:700;color:var(--brand);line-height:.9;letter-spacing:-.04em;margin-bottom:18px;}
.hero-name sup{font-size:.22em;font-weight:600;vertical-align:super;letter-spacing:0;}
.hero h1{font-family:var(--display);font-size:clamp(24px,2.5vw,32px);font-weight:600;color:var(--ink);line-height:1.18;letter-spacing:-.01em;margin-bottom:20px;max-width:20ch;}
.hero-sub{font-size:16px;color:var(--ink-mid);line-height:1.75;margin-bottom:30px;max-width:46ch;}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:34px;}
.hero-credit{padding-top:22px;border-top:1px solid var(--line-strong);font-size:13px;color:var(--ink-mid);line-height:1.6;max-width:46ch;}
.hero-credit strong{color:var(--ink);font-weight:600;}

.hero-photo{position:relative;justify-self:center;width:100%;max-width:640px;margin:0;}
/* The pale disc the product sheet sets its renders against. */
.hero-photo::before{content:"";position:absolute;inset:-4% 4% 10%;border-radius:50%;
  background:radial-gradient(circle at 50% 50%,#e2eaf6 0,#e2eaf6 58%,rgba(226,234,246,0) 73%);}
.hero-photo img{position:relative;width:100%;height:auto;display:block;}

/* ============ BUTTONS ============ */
.btn-primary{display:inline-flex;align-items:center;gap:9px;background:var(--brand);color:#fff;padding:14px 26px;border-radius:var(--r);font-size:15px;font-weight:600;text-decoration:none;transition:background .18s;}
.btn-primary:hover{background:var(--brand-dark);}
.btn-secondary{display:inline-flex;align-items:center;gap:8px;background:transparent;color:var(--ink);padding:14px 26px;border-radius:var(--r);font-size:15px;font-weight:600;text-decoration:none;transition:border-color .18s,background .18s;border:1px solid var(--line-strong);}
.btn-secondary:hover{border-color:var(--ink-light);background:rgba(255,255,255,.6);}

/* ============ SECTION COMMONS ============ */
section{padding:58px 48px;}
.sec-wrap{max-width:1240px;margin:0 auto;}
/* The deck marks every slide title with a teal dot; the eyebrow carries it. */
.sec-eye{display:flex;align-items:center;gap:10px;font-size:11px;font-weight:600;color:var(--brand);letter-spacing:.18em;text-transform:uppercase;margin-bottom:14px;}
.sec-eye::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--accent);flex-shrink:0;}
.sec-title{font-family:var(--display);font-size:clamp(29px,3.2vw,40px);font-weight:700;color:var(--brand);line-height:1.12;letter-spacing:-.025em;margin-bottom:16px;}
.sec-desc{font-size:16px;color:var(--ink-mid);line-height:1.75;max-width:58ch;}
.sec-head{margin-bottom:34px;max-width:760px;}
.intro{max-width:680px;}
.alt{background:var(--bg-alt);}
.navy{background:var(--brand);color:#fff;}
.navy .sec-eye{color:var(--accent);}
.navy .sec-title{color:#fff;}
.navy .sec-desc{color:rgba(255,255,255,.82);}

/* ============ SPECIAL FEATURES (hero strip) ============ */
.specials{list-style:none;display:flex;flex-wrap:wrap;gap:7px;margin-bottom:30px;}
.specials li{display:flex;align-items:center;gap:7px;font-size:12.5px;font-weight:600;color:var(--ink);background:var(--bg);border:1px solid var(--line-strong);border-radius:var(--r);padding:6px 11px;}
.specials li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);flex-shrink:0;}

/* ============ THE CHAIR ============ */
.chair-grid{display:grid;grid-template-columns:360px 1fr;gap:52px;align-items:start;}
.features{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:22px 32px;margin-bottom:26px;}
.features li{display:grid;grid-template-columns:42px 1fr;gap:16px;align-items:start;}
.tile{width:42px;height:42px;border-radius:var(--r);background:var(--brand);display:flex;align-items:center;justify-content:center;}
.tile svg{width:20px;height:20px;stroke:#fff;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;display:block;}
.features h3{font-family:var(--display);font-size:16.5px;font-weight:700;color:var(--ink);letter-spacing:-.01em;margin-bottom:3px;}
.features p{font-size:14.5px;color:var(--ink-mid);line-height:1.6;}

.choose{display:flex;gap:40px;flex-wrap:wrap;padding-top:22px;border-top:1px solid var(--line-strong);}
.meta-lbl{display:block;font-size:10px;font-weight:600;color:var(--ink-light);text-transform:uppercase;letter-spacing:.12em;margin-bottom:11px;}
.chips{display:flex;gap:8px;}
.chip{font-size:13.5px;font-weight:600;color:var(--brand);background:var(--bg);border:1px solid var(--line-strong);border-radius:var(--r);padding:7px 14px;}
.swatches{display:flex;gap:9px;}
/* Each colourway is two-tone: a dark upper panel over the colour, as supplied. */
.swatch{width:52px;height:34px;border-radius:var(--r);border:1px solid var(--line-strong);overflow:hidden;display:flex;flex-direction:column;}
.swatch span{display:block;}
.swatch span:first-child{height:38%;}
.swatch span:last-child{flex:1;}

/* ============ WALKTHROUGH ============ */
/* Full-width player, controls on, nothing preloaded until someone presses
   play - the file is 8 MB. */
.film{position:relative;max-width:940px;border-radius:var(--r);overflow:hidden;background:#000;aspect-ratio:848/478;margin-top:30px;}
.film video{width:100%;height:100%;display:block;}
.film-note{font-size:12.5px;color:var(--ink-light);margin-top:12px;line-height:1.6;}

/* ============ IMAGE STRIP ============ */
.strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:40px;}
.strip figure{margin:0;}
.strip button{display:block;width:100%;padding:0;border:1px solid var(--line-strong);border-radius:var(--r);overflow:hidden;background:var(--bg);cursor:zoom-in;transition:border-color .18s;}
.strip button:hover{border-color:var(--brand);}
.strip img{width:100%;aspect-ratio:16/11;object-fit:cover;display:block;}
.strip figcaption{font-size:12.5px;color:var(--ink-light);margin-top:9px;line-height:1.5;}

/* ============ HOW IT WORKS (band) ============ */
.band{margin-top:36px;padding-top:26px;border-top:1px solid var(--line-strong);}
.steps{list-style:none;counter-reset:step;display:grid;grid-template-columns:repeat(5,1fr);gap:24px;margin-top:20px;}
.steps li{position:relative;padding-left:34px;font-size:14px;color:var(--ink-mid);line-height:1.55;}
.steps li::before{counter-increment:step;content:counter(step);position:absolute;top:-2px;left:0;width:24px;height:24px;border-radius:50%;background:var(--brand);color:#fff;font-family:var(--display);font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;}

/* ============ CONTACT ============ */
.contact{display:grid;grid-template-columns:1fr auto;gap:48px;align-items:center;}
.contact .sec-title{margin-bottom:10px;}
.contact-side{display:flex;flex-direction:column;align-items:flex-start;gap:16px;}
.contact-meta{font-size:13.5px;color:var(--ink-light);line-height:1.8;}
.contact-meta a{color:var(--ink-mid);}

/* ============ PARTS - annotated photograph ============ */
.parts-figure{position:relative;margin:0;border-radius:var(--r);overflow:hidden;background:var(--bg-alt);}
.parts-figure img{display:block;width:100%;}
/* Each dot sits at a percentage of the image box, so it tracks the photograph
   at every width. Coordinates are stored with the product entry. */
.hs{position:absolute;transform:translate(-50%,-50%);width:22px;height:22px;padding:0;border:none;border-radius:50%;background:rgba(28,61,120,.92);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:transform .16s ease,background .16s ease;}
.hs::before{content:"";width:6px;height:6px;border-radius:50%;background:#fff;}
.hs::after{content:"";position:absolute;inset:-7px;border-radius:50%;border:1px solid rgba(28,61,120,.45);opacity:0;transition:opacity .16s ease;}
.hs:hover,.hs:focus-visible,.hs.active{background:var(--accent);transform:translate(-50%,-50%) scale(1.15);outline:none;}
.hs:hover::after,.hs:focus-visible::after,.hs.active::after{opacity:1;}
.hs-tip{position:absolute;left:50%;bottom:calc(100% + 11px);transform:translateX(-50%);white-space:nowrap;background:var(--ink);color:#fff;font-size:12px;font-weight:600;letter-spacing:.01em;padding:6px 10px;border-radius:var(--r);opacity:0;pointer-events:none;transition:opacity .16s ease;}
.hs:hover .hs-tip,.hs:focus-visible .hs-tip,.hs.active .hs-tip{opacity:1;}
.adjust{list-style:none;display:grid;gap:22px;}
.adjust li{display:grid;grid-template-columns:44px 1fr;gap:16px;align-items:start;}
.tile{width:44px;height:44px;border-radius:var(--r);background:var(--brand);display:flex;align-items:center;justify-content:center;}
.tile svg{width:21px;height:21px;stroke:#fff;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;display:block;}
.adjust h3{font-family:var(--display);font-size:17px;font-weight:600;color:var(--ink);letter-spacing:-.01em;margin-bottom:5px;}
.adjust p{font-size:14.5px;color:var(--ink-mid);line-height:1.65;}

/* ============ PROVENANCE ============ */
.prov-head{display:grid;grid-template-columns:1fr auto;gap:48px;align-items:end;margin-bottom:34px;}
.prov-quote{font-size:17px;line-height:1.7;color:#fff;border-left:2px solid var(--accent);padding-left:20px;max-width:64ch;}
.prov-attr{font-size:13px;color:rgba(255,255,255,.7);line-height:1.8;text-align:right;white-space:nowrap;}
.prov-strip{margin-top:0;grid-template-columns:repeat(5,1fr);}
.prov-strip button{border-color:rgba(255,255,255,.25);background:rgba(255,255,255,.06);}
.prov-strip button:hover{border-color:var(--accent);}
.prov-strip figcaption{color:rgba(255,255,255,.62);}

/* ============ LIGHTBOX ============ */
.lightbox{position:fixed;inset:0;z-index:1000;background:rgba(16,19,21,.93);display:none;align-items:center;justify-content:center;}
.lightbox.open{display:flex;}
.lb-inner{position:relative;max-width:90vw;max-height:90vh;display:flex;flex-direction:column;align-items:center;gap:16px;}
.lb-img-wrap{position:relative;display:flex;align-items:center;gap:16px;}
.lb-img{max-width:78vw;max-height:72vh;object-fit:contain;border-radius:var(--r);background:#fff;}
.lb-btn{width:42px;height:42px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);border-radius:var(--r);display:flex;align-items:center;justify-content:center;cursor:pointer;color:#fff;font-size:17px;flex-shrink:0;transition:background .2s;padding:0;}
.lb-btn:hover{background:rgba(255,255,255,.22);}
.lb-close{position:absolute;top:-14px;right:-14px;width:36px;height:36px;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.22);border-radius:var(--r);display:flex;align-items:center;justify-content:center;cursor:pointer;color:#fff;font-size:18px;transition:background .2s;padding:0;}
.lb-close:hover{background:rgba(255,255,255,.3);}
.lb-caption{color:#fff;font-size:14px;font-weight:500;text-align:center;max-width:70ch;line-height:1.6;}
.lb-counter{color:rgba(255,255,255,.55);font-size:12px;letter-spacing:.06em;font-weight:500;}

/* ============ FOOTER ============ */
footer{background:var(--bg-alt);border-top:1px solid var(--line-strong);padding:28px 48px 22px;}
.foot-inner{max-width:1240px;margin:0 auto;display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:32px;}
.foot-company{display:flex;flex-direction:column;align-items:flex-start;gap:10px;}
.foot-brand{font-family:var(--display);font-size:19px;font-weight:700;color:var(--ink);letter-spacing:-.02em;}
.foot-brand em{color:var(--brand);font-style:normal;}
.foot-addr{font-style:normal;font-size:13.5px;color:var(--ink-mid);line-height:1.65;}
.foot-credit{display:flex;flex-direction:column;gap:2px;margin-top:2px;padding-top:10px;border-top:1px solid var(--line-strong);max-width:620px;}
.foot-credit-lbl{font-size:11px;color:var(--ink);font-weight:600;text-transform:uppercase;letter-spacing:.08em;}
.foot-credit-val{font-size:13.5px;color:var(--ink-mid);font-weight:500;line-height:1.6;}
.foot-links{display:flex;gap:18px;flex-wrap:wrap;}
.foot-links a{font-size:13.5px;color:var(--ink-mid);text-decoration:none;transition:color .15s;font-weight:500;}
.foot-links a:hover{color:var(--brand);}
.foot-bar{max-width:1240px;margin:24px auto 0;padding-top:18px;border-top:1px solid var(--line-strong);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px 20px;}
.foot-copy,.foot-note,.foot-powered{font-size:13px;color:var(--ink-light);}
.foot-powered a{color:var(--ink-mid);text-decoration:none;font-weight:600;}
.foot-powered a:hover{color:var(--brand);}

/* ============ FADE ============ */
.fi{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease;}
.fi.show{opacity:1;transform:translateY(0);}

/* ============ RESPONSIVE ============ */
@media(max-width:1180px){
  .nav-wrap nav{padding:0 24px;}
  section{padding:76px 24px;}
  .hero-inner{padding:56px 24px;gap:40px;}
  .points{grid-template-columns:repeat(2,1fr);gap:38px 36px;}
  .steps{grid-template-columns:repeat(3,1fr);gap:32px 24px;}
  .specials{grid-template-columns:repeat(2,1fr);}
  .modo-grid,.parts-grid,.choose,.contact-grid,.inuse,.prov-grid{gap:44px;}
}

@media(max-width:900px){
  .hero-inner{grid-template-columns:1fr;min-height:0;}
  .hero-photo{max-width:480px;order:-1;}
  .chair-grid,.prov-head,.contact{grid-template-columns:1fr;}
  .prov-attr{text-align:left;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .parts-figure{max-width:460px;}
  .contact{gap:28px;}
}

@media(max-width:768px){
  .nav-wrap nav{padding:0 16px;height:68px;}
  .nav-toggle{display:flex;}
  .nav-links{display:none;position:fixed;top:68px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;gap:2px;padding:12px 16px 20px;border-bottom:1px solid var(--line);box-shadow:0 12px 24px rgba(21,24,26,.08);max-height:calc(100vh - 68px);overflow-y:auto;}
  .nav-links.open{display:flex;}
  .nav-links li{width:100%;}
  .nav-links a{display:flex;justify-content:center;padding:14px 8px;font-size:15px;}
  .nav-cta{justify-content:center!important;margin:4px 0 0!important;}
  section{padding:56px 20px;}
  .hero-inner{padding:36px 20px 48px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions a{justify-content:center;}
  .steps{grid-template-columns:1fr;gap:28px;}
  .strip{grid-template-columns:repeat(2,1fr);}
  .choose{gap:28px;}
  .hero-photo{max-width:100%;}
  .hs{width:18px;height:18px;}
  .hs-tip{font-size:11px;}
  footer{padding:32px 20px;}
  .foot-inner{flex-direction:column;gap:26px;}
  .foot-bar{flex-direction:column;align-items:flex-start;gap:8px;}
  .lb-btn{width:36px;height:36px;}
}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .fi{opacity:1;transform:none;transition:none;}
  *{transition-duration:.01ms!important;}
}