/* ==========================================================================
   Deolify Health & Research — Design System
   Light, clean identity · premium preventive / longevity medicine
   ========================================================================== */

:root {
  --ink-900:#0b1220; --ink-800:#f6f8fb; --ink-700:#ffffff; --ink-600:#ffffff; --ink-500:#e9edf3;
  --line:rgba(15,23,42,.10); --line-strong:rgba(15,23,42,.16);
  --text:#243247; --muted:#51607a; --faint:#7b8799;
  --accent:#0d9488; --accent-2:#0284c7; --accent-soft:rgba(13,148,136,.10);
  --accent-line:rgba(13,148,136,.35); --glow:rgba(13,148,136,.18);
  --font-display:'Sora',system-ui,-apple-system,'Segoe UI',sans-serif;
  --font-body:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
  --container:1180px; --radius:18px; --radius-sm:12px; --gutter:clamp(20px,5vw,40px);
  --ease:cubic-bezier(.16,.84,.44,1);
  --shadow:0 24px 60px -24px rgba(15,23,42,.18); --shadow-soft:0 10px 30px -18px rgba(15,23,42,.14);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font-body);background:var(--ink-800);color:var(--text);line-height:1.65;font-size:17px;letter-spacing:.01em;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
::selection{background:var(--accent);color:#fff}

body::before{content:"";position:fixed;inset:0;background:radial-gradient(60% 50% at 78% -8%,rgba(2,132,199,.06),transparent 60%),radial-gradient(50% 40% at 8% 8%,rgba(13,148,136,.06),transparent 55%);pointer-events:none;z-index:0}

.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:var(--gutter)}
.section{position:relative;z-index:1;padding-block:clamp(64px,10vw,128px)}
.section--tight{padding-block:clamp(48px,7vw,88px)}

.eyebrow{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-display);font-size:12.5px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--accent)}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--accent-line)}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;line-height:1.12;letter-spacing:-.02em;color:#0f1b2d}
.h-xl{font-size:clamp(2.4rem,6vw,4.1rem)}
.h-lg{font-size:clamp(1.9rem,4vw,2.9rem)}
.h-md{font-size:clamp(1.35rem,2.4vw,1.7rem)}
.lead{font-size:clamp(1.05rem,1.6vw,1.22rem);color:var(--muted);max-width:60ch}
.section-head{max-width:62ch;margin-bottom:clamp(36px,5vw,60px)}
.section-head .lead{margin-top:16px}

.btn{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:600;font-size:15px;padding:13px 24px;border-radius:100px;border:1px solid transparent;transition:transform .3s var(--ease),background .3s var(--ease),border-color .3s}
.btn svg{width:17px;height:17px}
.btn--primary{background:var(--accent);color:#fff;box-shadow:0 8px 30px -10px var(--glow)}
.btn--primary:hover{transform:translateY(-2px);background:#0ba99c}
.btn--ghost{border-color:var(--line-strong);color:var(--text)}
.btn--ghost:hover{border-color:var(--accent-line);color:#0f1b2d;transform:translateY(-2px)}
.link-arrow{display:inline-flex;align-items:center;gap:7px;color:var(--accent);font-family:var(--font-display);font-weight:600;font-size:15px}
.link-arrow svg{width:16px;height:16px;transition:transform .3s var(--ease)}
.link-arrow:hover svg{transform:translate(3px,-3px)}

.site-header{position:sticky;top:0;z-index:100;transition:background .4s var(--ease),border-color .4s,backdrop-filter .4s;border-bottom:1px solid transparent}
.site-header.scrolled{background:rgba(255,255,255,.78);backdrop-filter:saturate(160%) blur(14px);-webkit-backdrop-filter:saturate(160%) blur(14px);border-bottom-color:var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.nav__logo img{height:30px;width:auto}
.nav__logo img,.footer__logo img{filter:brightness(0) opacity(.82)}
.nav__menu{display:flex;align-items:center;gap:8px;list-style:none}
.nav__menu a{position:relative;font-size:15px;font-weight:500;color:var(--muted);padding:9px 15px;border-radius:10px;transition:color .25s,background .25s}
.nav__menu a:hover{color:#0f1b2d;background:rgba(15,23,42,.05)}
.nav__menu a.btn--primary{color:#fff}
.nav__menu a.btn--primary:hover{color:#fff;background:#0ba99c}
.nav__has-sub{position:relative}
.nav__sub{position:absolute;top:calc(100% + 8px);left:0;min-width:220px;background:var(--ink-700);border:1px solid var(--line);border-radius:14px;padding:8px;list-style:none;box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translateY(6px);transition:all .25s var(--ease)}
.nav__has-sub:hover .nav__sub{opacity:1;visibility:visible;transform:translateY(0)}
.nav__sub a{display:block;border-radius:9px;color:var(--text)}
.nav__sub a span{display:block;font-size:12.5px;color:var(--faint);font-weight:400}
.nav__cta{margin-left:6px}
.nav__toggle{display:none;background:none;border:0;color:#0f1b2d;padding:8px}
.nav__toggle svg{width:26px;height:26px}
@media (max-width:860px){
 .nav__menu{position:fixed;inset:74px 0 auto 0;flex-direction:column;align-items:stretch;gap:4px;background:rgba(255,255,255,.97);backdrop-filter:blur(16px);padding:16px var(--gutter) 28px;border-bottom:1px solid var(--line);transform:translateY(-120%);transition:transform .4s var(--ease);z-index:90}
 .nav__menu.open{transform:translateY(0)}
 .nav__menu a{padding:13px 14px;font-size:16px}
 .nav__sub{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;background:transparent;border:0;padding:2px 0 6px 12px}
 .nav__cta{margin:8px 0 0}
 .nav__toggle{display:block}
}

.hero{position:relative;z-index:1;padding-top:clamp(56px,9vw,104px);padding-bottom:clamp(40px,6vw,72px)}
.hero__inner{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(32px,5vw,72px);align-items:center}
.hero h1{margin:20px 0 0}
.hero h1 .grad{background:linear-gradient(100deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{margin-top:22px}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero__stats{display:flex;gap:30px;margin-top:44px;flex-wrap:wrap}
.hero__stat strong{display:block;font-family:var(--font-display);font-size:1.7rem;color:#0f1b2d}
.hero__stat span{font-size:13.5px;color:var(--faint)}
.hero__media{position:relative}
.hero__frame{position:relative;border-radius:24px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);aspect-ratio:4/5}
.hero__frame img{width:100%;height:100%;object-fit:cover}
.hero__frame::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,rgba(15,23,42,.22))}
.hero__frame--placeholder{display:grid;place-items:center;border-style:dashed;border-color:var(--line-strong);background:var(--ink-800);box-shadow:none}
.hero__frame--placeholder::after{content:none}
.hero__placeholder{display:flex;flex-direction:column;align-items:center;gap:12px;color:var(--faint);font-family:var(--font-display);font-size:14px;letter-spacing:.02em}
.hero__placeholder svg{width:42px;height:42px;opacity:.45}
.hero__badge{position:absolute;left:-14px;bottom:28px;z-index:2;background:var(--ink-700);border:1px solid var(--line-strong);border-radius:16px;padding:14px 18px;box-shadow:var(--shadow);display:flex;align-items:center;gap:12px;backdrop-filter:blur(6px)}
.hero__badge .dot{width:10px;height:10px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.hero__badge b{font-family:var(--font-display);font-size:14px}
.hero__badge span{display:block;font-size:12px;color:var(--faint)}
@media (max-width:900px){.hero__inner{grid-template-columns:1fr}.hero__media{order:-1;max-width:440px}}

.trust{border-block:1px solid var(--line);padding-block:22px;overflow:hidden}
.trust__track{display:flex;white-space:nowrap;width:max-content;animation:marquee 34s linear infinite}
.trust__group{display:inline-flex;align-items:center}
.trust__group span{font-family:var(--font-display);font-size:14px;letter-spacing:.04em;color:var(--faint);display:inline-flex;align-items:center}
.trust__group span::after{content:"·";color:var(--accent);margin-inline:22px}
@keyframes marquee{to{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){.trust__track{animation:none}}

.features{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.feature{background:linear-gradient(180deg,var(--ink-600),var(--ink-700));border:1px solid var(--line);border-radius:var(--radius);padding:30px;transition:transform .4s var(--ease),border-color .4s}
.feature:hover{transform:translateY(-4px);border-color:var(--accent-line)}
.feature__icon{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent);margin-bottom:20px}
.feature__icon svg{width:24px;height:24px}
.feature h3{font-size:1.2rem;margin-bottom:10px}
.feature p{color:var(--muted);font-size:15.5px}
@media (max-width:720px){.features{grid-template-columns:1fr}}

.eco{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.eco__card{position:relative;overflow:hidden;border-radius:var(--radius);border:1px solid var(--line);padding:32px 30px 30px;background:var(--ink-700);min-height:220px;display:flex;flex-direction:column;transition:border-color .4s,transform .4s var(--ease)}
.eco__card::before{content:"";position:absolute;inset:0;opacity:.5;background:radial-gradient(120% 90% at 100% 0%,var(--accent-soft),transparent 55%);transition:opacity .4s}
.eco__card:hover{transform:translateY(-4px);border-color:var(--accent-line)}
.eco__card:hover::before{opacity:1}
.eco__tag{position:relative;font-family:var(--font-display);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
.eco__card h3{position:relative;font-size:1.5rem;margin:12px 0 10px}
.eco__card p{position:relative;color:var(--muted);font-size:15.5px;flex:1}
.eco__card .link-arrow{position:relative;margin-top:20px}
@media (max-width:720px){.eco{grid-template-columns:1fr}}

.research__head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:40px}
.research__grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
@media (max-width:760px){.research__grid{grid-template-columns:1fr}}
.pub{display:flex;flex-direction:column;gap:14px;background:var(--ink-600);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:transform .4s var(--ease),border-color .4s;position:relative}
.pub:hover{transform:translateY(-4px);border-color:var(--accent-line)}
.pub__top{display:flex;align-items:center;justify-content:space-between;gap:12px}
.pub__journal{font-family:var(--font-display);font-size:12.5px;letter-spacing:.04em;color:var(--accent-2);font-weight:600}
.pub__badge{font-family:var(--font-display);font-size:11px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;padding:5px 11px;border-radius:100px;border:1px solid var(--line-strong);color:var(--muted);white-space:nowrap}
.pub__badge[data-status="published"]{color:var(--accent);border-color:var(--accent-line);background:var(--accent-soft)}
.pub__badge[data-status="preprint"],.pub__badge[data-status="under review"]{color:#b45309;border-color:rgba(180,83,9,.35);background:rgba(251,191,36,.14)}
.pub h3{font-size:1.12rem;line-height:1.35}
.pub h3 a{transition:color .25s}
.pub h3 a:hover{color:var(--accent)}
.pub__abstract{font-size:14.5px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}
.pub__meta{display:flex;align-items:center;gap:14px;margin-top:auto;padding-top:6px;font-size:13px;color:var(--faint)}
.pub__meta .link-arrow{font-size:13.5px;margin-left:auto}
.pub--skeleton{pointer-events:none}
.sk{background:linear-gradient(90deg,var(--ink-500) 25%,var(--ink-600) 37%,var(--ink-500) 63%);background-size:400% 100%;animation:shimmer 1.4s ease infinite;border-radius:6px}
@keyframes shimmer{0%{background-position:100% 0}100%{background-position:-100% 0}}
.sk-line{height:12px;margin-bottom:8px}
.sk-badge{height:22px;width:90px;border-radius:100px}
.sk-title{height:18px;width:80%;margin:6px 0}
.research__status{font-size:13px;color:var(--faint);display:inline-flex;align-items:center;gap:8px}
.research__status .dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}

.band{position:relative;overflow:hidden;border-radius:28px;border:1px solid var(--line);padding:clamp(40px,6vw,72px);background:radial-gradient(90% 120% at 100% 0%,rgba(2,132,199,.09),transparent 55%),radial-gradient(80% 120% at 0% 100%,rgba(13,148,136,.09),transparent 55%),var(--ink-700)}
.band h2{max-width:20ch}
.band p{color:var(--muted);max-width:56ch;margin-top:18px}
.band .btn{margin-top:30px}

.contact{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,56px);align-items:start}
.contact__form{background:var(--ink-700);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(24px,4vw,36px)}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:8px;font-family:var(--font-display);font-weight:500}
.field input,.field textarea{width:100%;background:var(--ink-800);border:1px solid var(--line-strong);border-radius:11px;padding:13px 15px;color:var(--text);font-family:inherit;font-size:15px;transition:border-color .25s,box-shadow .25s}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--accent-line);box-shadow:0 0 0 3px var(--accent-soft)}
.field textarea{resize:vertical;min-height:130px}
.form-note{font-size:13px;color:var(--faint);margin-top:4px}
.form-success{font-size:1.05rem;color:var(--text);text-align:center;padding:28px 0}
.form-success strong{font-family:var(--font-display);font-size:1.25rem;color:#0f1b2d}
@media (max-width:800px){.contact{grid-template-columns:1fr}}

.footer{border-top:1px solid var(--line);padding-block:56px 30px;position:relative;z-index:1}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px}
.footer__logo img{height:30px;margin-bottom:18px}
.footer p{color:var(--muted);font-size:14.5px;max-width:42ch}
.footer h4{font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:var(--faint);margin-bottom:16px}
.footer ul{list-style:none;display:flex;flex-direction:column;gap:11px}
.footer ul a{color:var(--muted);font-size:15px;transition:color .25s}
.footer ul a:hover{color:var(--accent)}
.footer__bottom{margin-top:44px;padding-top:22px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--faint)}
.footer__addr{font-style:normal}
@media (max-width:720px){.footer__grid{grid-template-columns:1fr 1fr}.footer__logo{grid-column:1 / -1}}

.page-hero{padding-top:clamp(56px,8vw,96px);padding-bottom:clamp(24px,4vw,40px)}
.page-hero h1{margin-top:18px;max-width:18ch}
.page-hero .lead{margin-top:20px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,60px);align-items:center}
.split--reverse .split__media{order:2}
.split__media img{border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow-soft);aspect-ratio:4/3;object-fit:cover;width:100%}
.split h2{margin-bottom:16px}
.split p{color:var(--muted)}
.split p + p{margin-top:14px}
@media (max-width:800px){.split{grid-template-columns:1fr}.split--reverse .split__media{order:-1}}
.approach{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.approach__card{background:var(--ink-700);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:transform .4s var(--ease),border-color .4s}
.approach__card:hover{transform:translateY(-4px);border-color:var(--accent-line)}
.approach__num{font-family:var(--font-display);color:var(--accent);font-size:13px;letter-spacing:.1em}
.approach__card h3{font-size:1.12rem;margin-top:14px}
@media (max-width:900px){.approach{grid-template-columns:repeat(2,1fr)}}
@media (max-width:520px){.approach{grid-template-columns:1fr}}
.tools{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.tool{display:flex;flex-direction:column;gap:14px;background:var(--ink-700);border:1px solid var(--line);border-radius:var(--radius);padding:32px;transition:transform .4s var(--ease),border-color .4s}
.tool:hover{transform:translateY(-4px);border-color:var(--accent-line)}
.tool__badge{align-self:flex-start;font-family:var(--font-display);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);background:var(--accent-soft);border:1px solid var(--accent-line);padding:5px 12px;border-radius:100px}
.tool h3{font-size:1.4rem}
.tool p{color:var(--muted);flex:1}
@media (max-width:720px){.tools{grid-template-columns:1fr}}

.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal[data-d="1"]{transition-delay:.08s}
.reveal[data-d="2"]{transition-delay:.16s}
.reveal[data-d="3"]{transition-delay:.24s}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}}