/* ==========================================================================
   VisioTherapy – base styles (layout + components). Colours and mood live in
   theme-v1.css / theme-v2.css / theme-v3.css via CSS custom properties.
   ========================================================================== */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;min-height:100vh;
  font-family:var(--font-body,"Noto Sans",system-ui,sans-serif);
  font-size:17px;line-height:1.6;color:var(--text);background:var(--bg);
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--link,var(--accent));text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{font-family:var(--font-head,"Sora",system-ui,sans-serif);font-weight:600;line-height:1.15;margin:0 0 .6em;color:var(--heading)}
h1{font-size:clamp(2.2rem,5.5vw,4rem);font-weight:700;letter-spacing:-.01em}
h2{font-size:clamp(1.8rem,3.6vw,2.7rem);letter-spacing:-.01em}
h3{font-size:1.2rem}
p{margin:0 0 1em}
ul{margin:0;padding:0;list-style:none}
svg{width:1em;height:1em;flex:none}
.wrap{width:min(1140px,100% - 40px);margin-inline:auto}
.wrap.narrow{width:min(860px,100% - 40px)}
section{position:relative;padding:clamp(64px,9vw,110px) 0}
.skip-link{position:absolute;left:-999px;top:8px;background:#fff;color:#000;padding:8px 12px;z-index:1000;border-radius:6px}
.skip-link:focus{left:8px}
.hl{background:var(--hl-gradient);-webkit-background-clip:text;background-clip:text;color:transparent}
.eyebrow{font-family:var(--font-head);font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:1em;font-weight:600}
.lead{font-size:clamp(1.05rem,1.6vw,1.25rem);color:var(--text-muted);max-width:60ch}
.light .lead{color:var(--light-text)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:.5em;padding:.8em 1.5em;border-radius:var(--radius-btn,10px);font-family:var(--font-head);font-weight:600;font-size:.95rem;line-height:1;border:2px solid transparent;cursor:pointer;transition:transform .2s,box-shadow .2s,background .2s,color .2s;white-space:nowrap}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn-primary{background:var(--btn-bg);color:var(--btn-text);box-shadow:0 8px 24px -8px var(--accent)}
.btn-primary:hover{box-shadow:0 12px 30px -8px var(--accent)}
.btn-outline{border-color:var(--accent);color:var(--accent);background:transparent}
.btn-outline:hover{background:var(--accent);color:var(--btn-text)}
.btn-ghost{color:var(--text);background:transparent;padding-inline:.6em}
.btn-ghost svg{transition:transform .2s}
.btn-ghost:hover svg{transform:translateX(3px)}
.link-arrow{display:inline-flex;align-items:center;gap:.4em;font-weight:600}
.link-arrow svg{transition:transform .2s}
.link-arrow:hover svg{transform:translateX(3px)}

/* ---------- header ---------- */
.site-header{position:fixed;inset:0 0 auto 0;z-index:100;background:var(--header-bg);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--header-border,transparent);transition:background .3s,box-shadow .3s}
.site-header.scrolled{background:var(--header-bg-scrolled,var(--header-bg));box-shadow:0 6px 30px -10px rgba(0,0,0,.5)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.brand img{height:32px;width:auto}
.main-nav ul{display:flex;align-items:center;gap:clamp(12px,2vw,26px)}
.main-nav a{color:var(--nav-text,var(--text));font-size:.92rem;font-weight:500;text-decoration:none}
.main-nav a:not(.btn):hover{color:var(--accent)}
.nav-cta .btn{padding:.6em 1.1em;font-size:.85rem}
.lang-switch{display:flex;align-items:center;gap:6px;font-family:var(--font-head);font-size:.82rem;font-weight:600;letter-spacing:.04em;padding-left:10px;border-left:1px solid var(--header-border,rgba(255,255,255,.15))}
.lang-switch .sep{opacity:.4}
.lang-switch .lang-current{color:var(--accent);cursor:default}
.lang-switch .lang-link{opacity:.7}
.lang-switch .lang-link:hover{opacity:1}
.nav-toggle{display:none;width:44px;height:44px;border:0;background:transparent;cursor:pointer;flex-direction:column;justify-content:center;gap:5px;padding:0 8px}
.nav-toggle span{display:block;height:2px;background:var(--text);border-radius:2px;transition:transform .25s,opacity .25s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
/* TREND site has a longer menu -> collapse earlier */
.main-nav a{white-space:nowrap}
@media (max-width:1180px){
  .site-trend .nav-toggle{display:flex}
  .site-trend .main-nav{position:fixed;inset:68px 0 auto 0;background:var(--mobile-nav-bg,var(--bg));border-bottom:1px solid var(--header-border,rgba(255,255,255,.1));transform:translateY(-10px);opacity:0;visibility:hidden;transition:.25s;max-height:calc(100vh - 68px);overflow:auto}
  .site-trend .main-nav.open{transform:none;opacity:1;visibility:visible}
  .site-trend .main-nav ul{flex-direction:column;align-items:stretch;padding:12px 20px 24px;gap:0}
  .site-trend .main-nav li{border-bottom:1px solid var(--header-border,rgba(255,255,255,.08))}
  .site-trend .main-nav li:last-child{border:0}
  .site-trend .main-nav a:not(.btn){display:block;padding:14px 4px;font-size:1.05rem}
  .site-trend .nav-cta{padding:14px 0}
  .site-trend .nav-cta .btn{width:100%;justify-content:center}
  .site-trend .lang-switch{border-left:0;padding:14px 4px}
}
@media (max-width:960px){
  .nav-toggle{display:flex}
  .main-nav{position:fixed;inset:68px 0 auto 0;background:var(--mobile-nav-bg,var(--bg));border-bottom:1px solid var(--header-border,rgba(255,255,255,.1));transform:translateY(-10px);opacity:0;visibility:hidden;transition:.25s;max-height:calc(100vh - 68px);overflow:auto}
  .main-nav.open{transform:none;opacity:1;visibility:visible}
  .main-nav ul{flex-direction:column;align-items:stretch;padding:12px 20px 24px;gap:0}
  .main-nav li{border-bottom:1px solid var(--header-border,rgba(255,255,255,.08))}
  .main-nav li:last-child{border:0}
  .main-nav a:not(.btn){display:block;padding:14px 4px;font-size:1.05rem}
  .nav-cta{padding:14px 0}
  .nav-cta .btn{width:100%;justify-content:center}
  .lang-switch{border-left:0;padding:14px 4px}
}

/* ---------- hero ---------- */
.hero{padding:0;min-height:min(92vh,860px);display:flex;align-items:center;overflow:hidden;isolation:isolate}
.hero.hero-compact{min-height:min(72vh,640px)}
.hero-bg{position:absolute;inset:0;z-index:-2}
.hero-bg img{width:100%;height:100%;object-fit:cover;object-position:center}
.hero-bg::after{content:"";position:absolute;inset:0;background:var(--hero-overlay)}
.hero-blobs{display:none;position:absolute;inset:0;z-index:-1;pointer-events:none;overflow:hidden}
.hero-blobs span{position:absolute;border-radius:50%;filter:blur(70px);opacity:.55}
.hero-inner{display:grid;grid-template-columns:1fr;gap:40px;padding:140px 0 90px}
.hero-content{max-width:720px}
.hero-content h1{color:var(--hero-heading,#fff)}
.hero .lead{color:var(--hero-text,var(--text))}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-visual{display:none;position:relative}
.hero-visual .ph{position:absolute;width:min(300px,30vw);filter:drop-shadow(0 30px 40px rgba(0,0,0,.45))}
@media (min-width:980px){
  .hero-inner.with-visual{grid-template-columns:1.1fr .9fr}
}

/* ---------- generic grids / cards ---------- */
.cols3,.cols4,.cards3,.grid2{display:grid;gap:28px}
.cols3,.cards3{grid-template-columns:repeat(3,1fr)}
.cols4{grid-template-columns:repeat(4,1fr)}
.grid2{grid-template-columns:repeat(2,1fr)}
.cols2{columns:2;column-gap:48px}
.cols2 p{break-inside:avoid}
@media (max-width:900px){.cols4{grid-template-columns:repeat(2,1fr)}.cols3,.cards3{grid-template-columns:1fr}.cols2{columns:1}}
@media (max-width:640px){.cols4,.grid2{grid-template-columns:1fr}}
.card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius,16px);padding:28px;box-shadow:var(--card-shadow,none);transition:transform .25s,box-shadow .25s,border-color .25s}
.card:hover{transform:translateY(-4px);border-color:var(--accent)}
.card h3{margin-bottom:.5em}
.card p{margin:0;color:var(--text-muted)}
.cards3 .card{text-align:center}
.feature .icon{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;background:var(--icon-bg);color:var(--accent);margin-bottom:18px}
.feature .icon svg{width:26px;height:26px}
.feature p{color:var(--text-muted);margin:0}
.checklist li{display:flex;gap:12px;align-items:flex-start;padding:7px 0}
.checklist svg{width:22px;height:22px;color:var(--accent);margin-top:3px;background:var(--icon-bg);border-radius:50%;padding:3px}

/* ---------- light sections (teal) ---------- */
.light{background:var(--light-bg);color:var(--light-text)}
.light h2,.light h3{color:var(--light-heading)}
.light p{color:var(--light-text)}
.light a{color:var(--light-link,var(--light-heading));text-decoration:underline;text-underline-offset:3px}
.intro .col h3{font-size:1.15rem}

/* ---------- whom / impact ---------- */
.whom .lead{margin-bottom:40px;max-width:70ch}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;text-align:center;margin-top:40px}
.stats .stat:nth-child(4){grid-column:1/-1;max-width:420px;margin:0 auto}
@media (max-width:760px){.stats{grid-template-columns:1fr}}
.stat .num{font-family:var(--font-head);font-size:clamp(3rem,7vw,4.6rem);font-weight:700;line-height:1;color:var(--stat-color,var(--heading));margin-bottom:12px}
.stat .unit{font-size:.6em;margin-left:.08em}
.stat h3{font-size:1.25rem}
.stat p{color:var(--text-muted);margin:0}

/* ---------- apps (two rows: therapist / patient) ---------- */
.app-row{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;padding:30px 0}
.app-row+.app-row{margin-top:40px}
.app-row.reverse .app-text{order:2}
/* two phone mock-ups (600x1200, cropped to the device outline), the second one slightly behind */
.phones{position:relative;display:flex;justify-content:center;align-items:flex-start;padding:16px 0 40px}
.phones img{width:min(52%,290px);flex:none;filter:drop-shadow(0 30px 40px rgba(0,0,0,.5))}
.phones .ph-front{position:relative;z-index:2}
.phones .ph-back{margin-left:-22%;transform:translateY(56px) scale(.92);transform-origin:top center;opacity:.95}
@media (max-width:860px){.app-row{grid-template-columns:1fr}.app-row.reverse .app-text{order:0}.phones img{width:min(50%,250px)}}

/* ---------- features (background image section) ---------- */
.bgimg{isolation:isolate}
.section-bg{position:absolute;inset:0;z-index:-1;overflow:hidden}
.section-bg img{width:100%;height:100%;object-fit:cover}
.section-bg::after{content:"";position:absolute;inset:0;background:var(--section-overlay)}

/* ---------- APTA / TACR rows ---------- */
.apta-row,.tacr-row{display:grid;grid-template-columns:260px 1fr;gap:40px;align-items:center}
.apta-row p,.tacr-row p{font-size:1.05rem;margin:0}
.tacr-row .more{margin-top:14px}
.apta-badge,.tacr-logo{display:grid;place-items:center}
.apta-badge img{width:220px;border-radius:12px}
.tacr-logo img{width:180px}
@media (max-width:720px){.apta-row,.tacr-row{grid-template-columns:1fr;text-align:center;gap:24px}}
.apta.light,.tacr.light{padding:clamp(48px,6vw,70px) 0}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:start}
@media (max-width:860px){.faq-grid{grid-template-columns:1fr}.faq-img{display:none}}
.faq-img img{border-radius:var(--radius,16px);box-shadow:0 30px 60px -20px rgba(0,0,0,.6);aspect-ratio:4/5;object-fit:cover}
.faq-item{border-bottom:1px solid var(--card-border);padding:6px 0}
.faq-item summary{cursor:pointer;list-style:none;display:flex;gap:14px;align-items:flex-start;padding:16px 0;font-family:var(--font-head);font-weight:600;font-size:1.05rem;color:var(--heading)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{content:"";flex:none;width:10px;height:10px;margin-top:9px;border-right:2px solid var(--accent);border-bottom:2px solid var(--accent);transform:rotate(-45deg);transition:transform .2s}
.faq-item[open] summary::before{transform:rotate(45deg)}
.faq-a{padding:0 0 18px 24px;color:var(--text-muted)}
.faq-a p{margin:0}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}
.contact-grid.two{grid-template-columns:repeat(2,1fr)}
@media (max-width:800px){.contact-grid,.contact-grid.two{grid-template-columns:1fr}}
.contact .reach{color:var(--text-muted);margin-bottom:.3em}
.contact .email a{font-weight:600;font-size:1.15rem;text-decoration:underline;text-underline-offset:4px}
.contact-col h3{color:var(--accent);font-size:1.15rem}
.contact-col p{color:var(--text-muted)}
.contact-col .person strong{color:var(--heading)}
.contact-col a{text-decoration:underline;text-underline-offset:3px}

/* ---------- footer ---------- */
.site-footer{background:var(--footer-bg,transparent);border-top:1px solid var(--card-border);padding:56px 0 32px;color:var(--text-muted);font-size:.95rem}
.footer-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}
@media (max-width:800px){.footer-grid{grid-template-columns:1fr}}
.footer-col h3{color:var(--accent);font-size:1.05rem}
.footer-col a{text-decoration:underline;text-underline-offset:3px;color:var(--text)}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;margin-top:40px;padding-top:20px;border-top:1px solid var(--card-border);font-size:.85rem}
.footer-bottom p{margin:0}
.footer-links{display:flex;gap:20px}
.footer-links a{color:var(--text-muted)}

/* ---------- TREND specific ---------- */
.prose p{max-width:80ch}
.shots{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:36px}
@media (max-width:860px){.shots{grid-template-columns:1fr}}
.shot{margin:0}
.shot img{border-radius:12px;border:1px solid var(--card-border);box-shadow:0 20px 40px -20px rgba(0,0,0,.6);background:#fff}
.shot figcaption{font-size:.82rem;color:var(--text-muted);margin-top:10px}
.app-lists{margin:36px 0}
.app-lists .card h3{color:var(--accent)}
.video-frame{position:relative;aspect-ratio:16/9;background:#000;border-radius:16px;overflow:hidden;box-shadow:0 30px 60px -25px rgba(0,0,0,.7);border:1px solid var(--card-border)}
.video-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.web-row{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:center}
@media (max-width:860px){.web-row{grid-template-columns:1fr}}
.diagram{margin:40px 0 56px;padding:16px;background:#fff;border-radius:16px}
.diagram img{margin:auto}
.pub-list .pub{padding:20px 0;border-bottom:1px solid var(--card-border);line-height:1.5}
.pub .authors{color:var(--text-muted)}
.pub a{font-family:var(--font-head);font-weight:600;color:var(--heading);text-decoration:underline;text-underline-offset:4px;text-decoration-color:var(--accent)}
.pub .venue{display:block;color:var(--text-muted);font-size:.92rem;margin-top:4px}

/* ---------- reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}
.no-js .reveal{opacity:1;transform:none}