/* Brand Ratna — AIDM Course Site */
:root{
  --blue:#154890;
  --blue-dark:#0e3469;
  --orange:#FF5C00;
  --orange-soft:#ff7a2b;
  --gray:#515151;
  --ink:#181414;
  --white:#fff;
  --bg:#f6f4ef;
  --bg-alt:#efece4;
  --line:rgba(24,20,20,.12);
  --radius:18px;
  --max:1240px;
  --shadow:0 30px 60px -30px rgba(21,72,144,.35);
  --shadow-soft:0 12px 30px -16px rgba(24,20,20,.18);
  --serif:"Fraunces", Georgia, serif;
  --sans:"Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{margin:0;padding:0}
body{font-family:var(--sans);color:var(--ink);background:var(--bg);line-height:1.55;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
.skip{position:absolute;left:-9999px}
.skip:focus{left:1rem;top:1rem;background:var(--ink);color:#fff;padding:.6rem 1rem;z-index:9999;border-radius:8px}

.wrap{max-width:var(--max);margin:0 auto;padding:0 28px}
section{padding:96px 0;position:relative}
section.alt{background:var(--bg-alt)}
@media(max-width:720px){section{padding:64px 0}}

/* Typography */
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;letter-spacing:-.02em;line-height:1.05;margin:0 0 .4em;color:var(--ink)}
h1{font-size:clamp(2.4rem,6vw,4.6rem);font-weight:800}
h2{font-size:clamp(2rem,4vw,3.2rem)}
h3{font-size:clamp(1.3rem,2vw,1.8rem)}
h4{font-size:1.05rem;letter-spacing:0}
p{margin:0 0 1em}
.lead{font-size:clamp(1.02rem,1.3vw,1.18rem);color:var(--gray);max-width:62ch}
.muted{color:var(--gray)}
.tiny{font-size:.8rem}
.accent{color:var(--orange);font-style:italic}
.eyebrow{display:inline-flex;align-items:center;gap:8px;text-transform:uppercase;letter-spacing:.22em;font-size:.72rem;font-weight:700;color:var(--orange);margin-bottom:14px}
.eyebrow::before{content:"";width:28px;height:1px;background:var(--orange)}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:999px;font-weight:600;font-size:.95rem;background:var(--orange);color:#fff;border:0;cursor:pointer;transition:transform .25s ease, box-shadow .25s ease, background .25s ease;will-change:transform}
.btn:hover{transform:translateY(-2px);box-shadow:0 14px 30px -10px rgba(255,92,0,.55);background:var(--orange-soft);color:#fff}
.btn.dark{background:var(--ink)}
.btn.dark:hover{background:var(--blue);box-shadow:0 14px 30px -10px rgba(21,72,144,.55)}
.btn.ghost{background:transparent;color:var(--ink);border:1.5px solid var(--ink)}
.btn.ghost:hover{background:var(--ink);color:#fff;box-shadow:none}

/* Nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(246,244,239,.85);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 28px;max-width:var(--max);margin:0 auto;gap:24px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700}
.brand img{height:36px;width:auto}
.brand b{font-family:var(--serif);font-size:1.15rem;letter-spacing:-.01em}
.brand b span{color:var(--orange)}
.nav-links{display:flex;gap:4px;align-items:center}
.nav-links a{padding:9px 14px;border-radius:999px;font-size:.92rem;font-weight:500;color:var(--ink);transition:background .2s, color .2s}
.nav-links a:hover{background:var(--ink);color:#fff}
.nav-links a.btn{padding:11px 20px;color:#fff;background:var(--orange)}
.nav-links a.btn:hover{background:var(--orange-soft)}
.burger{display:none;background:none;border:0;font-size:1.6rem;cursor:pointer;color:var(--ink)}

@media(max-width:980px){
  .nav-links{position:fixed;top:0;right:0;left:0;height:100dvh;transform:translateX(102%);transition:transform .42s cubic-bezier(.16,1,.3,1);background:rgba(255,255,255,.98);backdrop-filter:blur(8px);flex-direction:column;align-items:stretch;gap:2px;padding:88px 20px 32px;overflow-y:auto;z-index:120;box-shadow:-30px 0 60px -30px rgba(21,72,144,.45)}
  .nav-links.open{transform:translateX(0)}
  .nav-links a{padding:14px 16px;border-radius:12px;font-size:1.05rem}
  .burger{display:block;z-index:130;position:relative}
  body.nav-open{overflow:hidden}
}

/* HERO */
.hero{padding:88px 0 56px;overflow:hidden;position:relative}
.hero::before{content:"";position:absolute;inset:auto -10% -40% auto;width:720px;height:720px;border-radius:50%;background:radial-gradient(circle at 30% 30%, rgba(255,92,0,.20), transparent 60%);z-index:0;animation:floatA 14s ease-in-out infinite}
.hero::after{content:"";position:absolute;inset:-30% auto auto -20%;width:720px;height:720px;border-radius:50%;background:radial-gradient(circle at 70% 70%, rgba(21,72,144,.20), transparent 60%);z-index:0;animation:floatB 18s ease-in-out infinite}
@keyframes floatA{50%{transform:translate(-30px,20px) scale(1.05)}}
@keyframes floatB{50%{transform:translate(40px,-20px) scale(1.05)}}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0 18px}
.hero-chips{list-style:none;padding:0;margin:14px 0 0;display:flex;flex-wrap:wrap;gap:8px}
.hero-chips li{background:#fff;border:1px solid var(--line);padding:8px 14px;border-radius:999px;font-size:.84rem;font-weight:500;box-shadow:var(--shadow-soft)}
.hero-art{position:relative}
.hero-art img{border-radius:24px;box-shadow:var(--shadow);aspect-ratio:1600/1100;object-fit:cover}
.float-card{position:absolute;background:#fff;padding:14px 18px;border-radius:14px;box-shadow:var(--shadow);display:flex;flex-direction:column;animation:bob 5s ease-in-out infinite}
.float-card strong{font-family:var(--serif);font-size:1.7rem;color:var(--blue);line-height:1}
.float-card span{font-size:.78rem;color:var(--gray);margin-top:4px}
.float-card.f1{top:-18px;left:-18px}
.float-card.f2{bottom:-18px;right:-18px;animation-delay:1s}
.float-card.f2 strong{color:var(--orange)}
@keyframes bob{50%{transform:translateY(-8px)}}
@media(max-width:880px){.hero-grid{grid-template-columns:1fr;gap:48px}.float-card.f1{left:8px}.float-card.f2{right:8px}}

/* Marquee */
.marquee{margin-top:56px;overflow:hidden;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:18px 0;background:#fff}
.marquee-track{display:flex;gap:48px;white-space:nowrap;animation:scroll 35s linear infinite;font-family:var(--serif);font-size:1.4rem;color:var(--ink)}
.marquee-track span{display:inline-flex;align-items:center;gap:48px}
.marquee-track span::after{content:"●";margin-left:48px;color:var(--orange);font-size:.7em}
@keyframes scroll{to{transform:translateX(-50%)}}

/* Section heads */
.section-head{max-width:780px;margin-bottom:48px}

/* Stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:64px}
.stat{background:#fff;border:1px solid var(--line);padding:24px;border-radius:var(--radius);transition:transform .3s, box-shadow .3s}
.stat:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.stat strong{font-family:var(--serif);font-size:clamp(1.8rem,3vw,2.6rem);color:var(--blue);display:block;line-height:1}
.stat span{font-size:.88rem;color:var(--gray);display:block;margin-top:8px}
@media(max-width:720px){.stats{grid-template-columns:repeat(2,1fr)}}

/* Cards grids */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:880px){.grid-3{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:transform .3s, box-shadow .3s, border-color .3s;position:relative;overflow:hidden}
.card::before{content:"";position:absolute;inset:auto -40% -60% auto;width:240px;height:240px;border-radius:50%;background:radial-gradient(circle, rgba(255,92,0,.10), transparent 70%);opacity:0;transition:opacity .4s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.card:hover::before{opacity:1}
.card h3{font-size:1.25rem}
.card p{color:var(--gray);margin:0;font-size:.95rem}

/* Who */
.who-grid .who-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;position:relative;overflow:hidden;transition:transform .3s, box-shadow .3s}
.who-grid .who-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.who-card .num{font-family:var(--serif);font-size:2.4rem;color:var(--orange);font-weight:800;line-height:1;display:block;margin-bottom:8px}
.who-card.feature{background:var(--ink);color:#fff;display:flex;flex-direction:column;justify-content:space-between}
.who-card.feature h3{color:#fff}
.who-card.feature p{color:rgba(255,255,255,.7)}
.who-card.feature .link{margin-top:14px;color:var(--orange);font-weight:600;display:inline-block;position:relative}
.who-card.feature .link::after{content:"";position:absolute;left:0;bottom:-3px;height:2px;width:100%;background:var(--orange);transform:scaleX(.4);transform-origin:left;transition:transform .3s}
.who-card.feature .link:hover::after{transform:scaleX(1)}

/* Curriculum */
.modules{display:grid;gap:14px}
.module{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:box-shadow .3s, transform .3s}
.module:hover{box-shadow:var(--shadow-soft)}
.module summary{list-style:none;cursor:pointer;padding:22px 28px;display:flex;align-items:center;gap:18px;font-family:var(--serif);font-size:1.25rem;font-weight:600}
.module summary::-webkit-details-marker{display:none}
.m-no{display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:50%;background:var(--bg-alt);color:var(--blue);font-family:var(--serif);font-weight:800;font-size:1rem}
.m-title{flex:1}
.m-toggle{font-size:1.6rem;color:var(--orange);transition:transform .3s}
.module[open] .m-toggle{transform:rotate(45deg)}
.m-body{padding:0 28px 24px 88px}
.m-body ul{margin:0;padding:0;list-style:none;display:grid;gap:10px}
.m-body li{padding-left:22px;position:relative;color:var(--gray)}
.m-body li::before{content:"";position:absolute;left:0;top:9px;width:10px;height:10px;border-radius:3px;background:var(--orange);transform:rotate(45deg)}
.m-body li b{color:var(--ink)}
@media(max-width:680px){.module summary{padding:18px 20px;font-size:1.1rem}.m-body{padding:0 20px 20px 20px}}

/* Tools */
.tools-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:40px}
@media(max-width:880px){.tools-grid{grid-template-columns:1fr}}
.tool-cat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:transform .3s, box-shadow .3s}
.tool-cat:hover{transform:translateY(-4px);box-shadow:var(--shadow-soft)}
.tool-cat h4{color:var(--blue);text-transform:uppercase;letter-spacing:.12em;font-size:.78rem;font-weight:700;font-family:var(--sans);margin-bottom:14px}
.pills{display:flex;flex-wrap:wrap;gap:8px}
.pills span{background:var(--bg-alt);padding:7px 13px;border-radius:999px;font-size:.85rem;font-weight:500;transition:background .2s, color .2s, transform .2s}
.pills span:hover{background:var(--orange);color:#fff;transform:translateY(-2px)}
.tools-figure{margin:0;border-radius:24px;overflow:hidden;box-shadow:var(--shadow)}
.tools-figure img{aspect-ratio:14/10;object-fit:cover}

/* Certificate */
.cert-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
@media(max-width:880px){.cert-grid{grid-template-columns:1fr;gap:40px}}
.cert-art img{border-radius:24px;box-shadow:var(--shadow);aspect-ratio:14/10;object-fit:cover;transition:transform .6s}
.cert-art:hover img{transform:scale(1.03)}
.check{list-style:none;padding:0;margin:0 0 24px;display:grid;gap:8px}
.check li{padding-left:30px;position:relative;color:var(--ink)}
.check li::before{content:"✓";position:absolute;left:0;top:0;width:20px;height:20px;border-radius:50%;background:var(--orange);color:#fff;font-size:.7rem;display:inline-flex;align-items:center;justify-content:center;font-weight:700;line-height:20px}
.roles{margin-top:72px;text-align:center}
.roles h3{margin-bottom:20px}
.role-pills{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.role-pills span{background:#fff;border:1px solid var(--line);padding:10px 18px;border-radius:999px;font-size:.92rem;font-weight:500;transition:transform .25s, background .25s, color .25s, border-color .25s}
.role-pills span:hover{background:var(--blue);color:#fff;border-color:var(--blue);transform:translateY(-3px)}

/* Enroll */
.enroll{background:linear-gradient(180deg,var(--bg) 0%,var(--bg-alt) 100%)}
.enroll-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
@media(max-width:980px){.enroll-grid{grid-template-columns:1fr;gap:40px}}
.pay-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:8px;margin:20px 0;box-shadow:var(--shadow-soft)}
.pay-row{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px;border-radius:14px;transition:background .3s}
.pay-row:hover{background:var(--bg-alt)}
.pay-row.alt{border-top:1px dashed var(--line)}
.pay-row h4{margin:0 0 4px;font-family:var(--sans);font-size:1.02rem;font-weight:700}
.pay-row p{margin:0;color:var(--gray);font-size:.88rem}
.enroll-points{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:14px;margin-top:14px;color:var(--gray);font-size:.92rem}

.enroll-form,.contact-form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow-soft);display:flex;flex-direction:column;gap:14px}
.enroll-form h3,.contact-form h3{margin-bottom:0}
.enroll-form label,.contact-form label{display:flex;flex-direction:column;gap:6px;font-size:.85rem;font-weight:600;color:var(--ink)}
.enroll-form input,.enroll-form select,.enroll-form textarea,
.contact-form input,.contact-form textarea{font:inherit;font-weight:400;padding:12px 14px;border:1.5px solid var(--line);border-radius:10px;background:var(--bg);color:var(--ink);transition:border-color .2s, background .2s}
.enroll-form input:focus,.enroll-form select:focus,.enroll-form textarea:focus,
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--orange);background:#fff}
.enroll-form textarea,.contact-form textarea{resize:vertical;min-height:80px}

/* FAQ */
.faq-list{display:grid;gap:12px;max-width:880px;margin:0 auto}
.faq-list details{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 24px;transition:box-shadow .3s}
.faq-list details:hover{box-shadow:var(--shadow-soft)}
.faq-list summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-family:var(--serif);font-size:1.1rem;font-weight:600;gap:18px}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary i{font-style:normal;color:var(--orange);font-size:1.4rem;transition:transform .3s}
.faq-list details[open] summary i{transform:rotate(45deg)}
.faq-list details p{color:var(--gray);margin:14px 0 4px}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
@media(max-width:980px){.contact-grid{grid-template-columns:1fr;gap:40px}}
.contact-list{list-style:none;padding:0;margin:24px 0 0;display:grid;gap:18px}
.contact-list li{display:flex;flex-direction:column;gap:2px;background:#fff;border:1px solid var(--line);padding:16px 20px;border-radius:14px;transition:transform .25s, box-shadow .25s}
.contact-list li:hover{transform:translateY(-3px);box-shadow:var(--shadow-soft)}
.contact-list b{font-family:var(--sans);font-size:.75rem;text-transform:uppercase;letter-spacing:.14em;color:var(--orange);font-weight:700}
.contact-list a{font-weight:600;color:var(--ink)}

/* Footer */
.footer{background:var(--ink);color:#fff;padding:64px 0 24px;position:relative}
.footer h4{color:#fff;font-family:var(--sans);font-size:.78rem;text-transform:uppercase;letter-spacing:.18em;font-weight:700;margin-bottom:14px}
.footer .brand{color:#fff;margin-bottom:14px}
.footer .brand img{filter:brightness(0) invert(1)}
.footer .muted{color:rgba(255,255,255,.6);font-size:.92rem}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.12)}
@media(max-width:880px){.foot-grid{grid-template-columns:1fr 1fr}}
.foot-grid ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.foot-grid a{color:rgba(255,255,255,.75);transition:color .2s}
.foot-grid a:hover{color:var(--orange)}
.foot-bottom{display:flex;justify-content:space-between;padding-top:20px;color:rgba(255,255,255,.5);flex-wrap:wrap;gap:10px}

/* WhatsApp float */
.wa-float{position:fixed;right:20px;bottom:20px;width:56px;height:56px;border-radius:50%;background:#25D366;color:#fff;display:inline-flex;align-items:center;justify-content:center;box-shadow:0 14px 30px -8px rgba(37,211,102,.6);z-index:80;animation:pulse 2.4s ease-out infinite;transition:transform .2s}
.wa-float:hover{transform:scale(1.08);color:#fff}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(37,211,102,.55)}70%{box-shadow:0 0 0 20px rgba(37,211,102,0)}100%{box-shadow:0 0 0 0 rgba(37,211,102,0)}}

/* Reveal animation */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .8s ease, transform .8s ease}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .marquee-track,.hero::before,.hero::after,.float-card,.wa-float{animation:none!important}
}

/* ===== Certifications showcase ===== */
.cert-showcase{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin:32px 0 28px;perspective:1400px}
@media(max-width:900px){.cert-showcase{grid-template-columns:1fr;gap:20px}}
.cert-tile{margin:0;background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:var(--shadow-soft);transition:transform .5s cubic-bezier(.16,1,.3,1), box-shadow .5s;transform-style:preserve-3d;position:relative;overflow:hidden}
.cert-tile::after{content:"";position:absolute;inset:auto -30% -70% auto;width:240px;height:240px;border-radius:50%;background:radial-gradient(circle,rgba(21,72,144,.10),transparent 70%);opacity:0;transition:opacity .5s}
.cert-tile:hover{transform:translateY(-10px) rotateX(2deg) rotateY(-2deg);box-shadow:var(--shadow)}
.cert-tile:hover::after{opacity:1}
.cert-tile img{border-radius:12px;aspect-ratio:4/3;object-fit:cover;width:100%}
.cert-tile figcaption{padding:14px 6px 4px;display:flex;flex-direction:column;gap:4px}
.cert-tile figcaption b{font-family:var(--serif);font-size:1.08rem;color:var(--blue)}
.cert-tile figcaption span{font-size:.84rem;color:var(--gray)}
.cert-tile.featured{background:linear-gradient(160deg,#fff 0%,#fff7f0 100%);border-color:rgba(255,92,0,.25);transform:scale(1.02)}
.cert-tile.featured figcaption b{color:var(--orange)}
.cert-tile.featured::before{content:"★ Flagship";position:absolute;top:14px;right:14px;z-index:2;background:var(--orange);color:#fff;font-size:.7rem;font-weight:700;letter-spacing:.1em;padding:5px 10px;border-radius:999px;text-transform:uppercase}
.check-row{display:flex;flex-wrap:wrap;gap:14px 28px;justify-content:center;max-width:880px;margin:24px auto 0}
.check-row li{padding-left:28px}

/* ===== Reviews ===== */
.reviews{background:linear-gradient(180deg,var(--bg) 0%,var(--bg-alt) 100%)}
.rating-badge{display:inline-flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);padding:10px 18px;border-radius:999px;box-shadow:var(--shadow-soft);margin-top:18px}
.rating-badge b{font-family:var(--serif);font-size:1.05rem;color:var(--ink)}
.rating-badge .muted{font-size:.85rem}
.stars{color:#f5a623;letter-spacing:2px;font-size:.95rem}
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:8px}
@media(max-width:980px){.reviews-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.reviews-grid{grid-template-columns:1fr}}
.review{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:transform .4s cubic-bezier(.16,1,.3,1), box-shadow .4s;position:relative;overflow:hidden}
.review::before{content:"\201C";position:absolute;top:-18px;right:14px;font-family:var(--serif);font-size:7rem;color:rgba(21,72,144,.06);line-height:1;pointer-events:none}
.review:hover{transform:translateY(-6px) rotate(-.4deg);box-shadow:var(--shadow)}
.review header{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.review header div{flex:1;display:flex;flex-direction:column;line-height:1.25}
.review header b{font-size:.95rem}
.review header span:not(.avatar):not(.stars){font-size:.78rem;color:var(--gray)}
.review header .stars{font-size:.82rem}
.review p{margin:0;color:var(--ink);font-size:.95rem;line-height:1.6}
.avatar{width:44px;height:44px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.92rem;background:linear-gradient(135deg,var(--c1,#154890),var(--c2,#FF5C00));flex-shrink:0;box-shadow:0 6px 14px -6px rgba(24,20,20,.3)}

/* ===== Payment note in form ===== */
.pay-note{margin:-6px 0 0;padding:12px 14px;border-radius:10px;background:rgba(21,72,144,.07);color:var(--blue);font-size:.86rem;font-weight:500;min-height:1px;display:none}
.pay-note.show{display:block;animation:fadeUp .35s ease both}
.pay-note.success{background:rgba(34,197,94,.12);color:#15803d}
.pay-note.error{background:rgba(220,38,38,.10);color:#b91c1c}
@keyframes fadeUp{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* ===== Tilt / extra polish ===== */
.tilt{will-change:transform}
.btn{position:relative;overflow:hidden;isolation:isolate}
.btn::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,transparent 20%,rgba(255,255,255,.35) 50%,transparent 80%);transform:translateX(-120%);transition:transform .7s ease;z-index:-1}
.btn:hover::after{transform:translateX(120%)}

/* Active nav state */
.nav-links a.is-active{background:var(--ink);color:#fff}