/* ============================================================
   IB Prep — Offerings template (IB / Cambridge system pages)
   A bespoke layout that reads as an extension of the homepage:
   dark islands (rings + dots + bloom + glow cards), soft-paper
   fields, a gallery-style manifesto. Bold light <-> dark rhythm.
   Loads AFTER resources.css (shares tokens, nav, footer, buttons).
   ============================================================ */

/* ============ NAV — transparent over dark hero, solid on scroll ============ */
.nav{background:transparent;backdrop-filter:none;-webkit-backdrop-filter:none;
  border-bottom:1px solid transparent;box-shadow:none;
  transition:background .3s ease,border-color .3s,box-shadow .3s;}
.nav .logo{color:var(--paper);}
.nav .logo b{color:var(--blue);}
.nav-links a{color:rgba(245,242,236,.72);}
.nav-links a:hover{color:#fff;}
.burger{border-color:rgba(255,255,255,.32);color:#fff;}
.nav.scrolled{background:rgba(255,255,255,.82);backdrop-filter:blur(16px) saturate(160%);
  -webkit-backdrop-filter:blur(16px) saturate(160%);border-bottom:1px solid var(--hair);
  box-shadow:0 8px 30px -22px rgba(35,31,32,.4);}
.nav.scrolled .logo{color:var(--ink);}
.nav.scrolled .logo b{color:var(--blue-deep);}
.nav.scrolled .nav-links a{color:var(--mut);}
.nav.scrolled .nav-links a:hover{color:var(--ink);}
.nav.scrolled .burger{border-color:var(--hair-2);color:var(--ink);}

/* ============ DECOR (dark variants — light ones live in resources.css) ============ */
.deco-dots.dark{inset:0;
  background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1.6px);
  background-size:32px 32px;
  -webkit-mask:radial-gradient(125% 95% at 50% 112%,#000 0%,transparent 70%);
          mask:radial-gradient(125% 95% at 50% 112%,#000 0%,transparent 70%);}
.deco-bloom-dark{width:600px;height:600px;border-radius:50%;bottom:-260px;left:-200px;
  background:radial-gradient(circle,rgba(12,192,223,.13),transparent 62%);}
.deco-bloom-amber{width:520px;height:520px;border-radius:50%;top:-220px;right:-180px;
  background:radial-gradient(circle,rgba(255,183,3,.07),transparent 62%);}
.deco-rings{width:1180px;height:1180px;border-radius:50%;left:50%;bottom:-720px;transform:translateX(-50%);
  background:repeating-radial-gradient(circle at 50% 50%,transparent 0 93px,rgba(12,192,223,.07) 93px 94px);
  -webkit-mask:radial-gradient(circle at 50% 50%,#000 0%,transparent 70%);
          mask:radial-gradient(circle at 50% 50%,#000 0%,transparent 70%);}
@media (prefers-reduced-motion:no-preference){
  .deco-bloom,.deco-bloom-dark,.deco-bloom-amber{animation:bloomBreath 22s ease-in-out infinite;}
  .deco-bloom-amber{animation-duration:28s;animation-direction:reverse;}
}
@keyframes bloomBreath{0%,100%{transform:scale(1);opacity:.9;}50%{transform:scale(1.12);opacity:1;}}

/* ============ HERO — dark island, brand underline ============ */
.offer-hero{position:relative;color:var(--paper);overflow:hidden;
  padding:104px 0 82px;text-align:center;
  background:radial-gradient(125% 105% at 50% 26%, rgba(12,192,223,.12), transparent 58%), #0c0b0b;
  border-bottom:1px solid rgba(255,255,255,.06);}
/* centered concentric-ring motif behind the title (minimal brand accent) */
.offer-hero .deco-rings{top:50%;bottom:auto;left:50%;width:880px;height:880px;
  transform:translate(-50%,-50%);
  background:repeating-radial-gradient(circle at 50% 50%,transparent 0 68px,rgba(12,192,223,.16) 68px 69.5px);
  -webkit-mask:radial-gradient(circle at 50% 50%,#000 0%,transparent 68%);
          mask:radial-gradient(circle at 50% 50%,#000 0%,transparent 68%);}
.offer-hero .wrap{position:relative;z-index:2;max-width:900px;}
.offer-hero .crumb{color:rgba(245,242,236,.6);margin-bottom:26px;}
.offer-hero .crumb:hover{color:var(--blue);}
.offer-hero .eyebrow{color:var(--blue);display:block;margin-bottom:20px;}
.offer-hero h1{font-size:clamp(50px,8.6vw,104px);color:#fbfaf7;letter-spacing:-.05em;line-height:.98;
  text-shadow:0 2px 40px rgba(0,0,0,.35);}
.offer-hero h1 .uword{position:relative;display:inline-block;color:var(--blue);}
.offer-hero .hero-underline{position:absolute;left:50%;top:100%;transform:translate(-50%,-32%);
  width:108%;height:auto;pointer-events:none;filter:drop-shadow(0 1px 6px rgba(0,0,0,.35));}
.offer-hero .lead{margin:34px auto 0;max-width:560px;color:rgba(245,242,236,.78);
  font-weight:200;font-size:clamp(17px,1.6vw,20px);letter-spacing:0;line-height:1.65;}

/* ============ BAND SHELL ============ */
.oband{position:relative;padding:120px 0;overflow:hidden;}
.oband.dark{background:var(--dark);color:var(--paper);}
.oband.soft{background:var(--bg-soft);}
.oband .wrap{position:relative;z-index:2;}
.oband-head{text-align:center;max-width:760px;margin:0 auto 64px;}
.oband-head .eyebrow{display:block;margin-bottom:16px;}
.oband-head h2{font-size:clamp(30px,4.2vw,50px);letter-spacing:-.045em;line-height:1.04;}
.oband-head h2 .accent{color:var(--blue);}
.oband-head p{color:var(--mut);font-weight:200;font-size:17px;margin:20px auto 0;max-width:560px;
  letter-spacing:0;line-height:1.65;}
.oband.dark .eyebrow{color:var(--blue);}
.oband.dark .oband-head h2{color:var(--paper);}
.oband.dark .oband-head p{color:rgba(245,242,236,.6);}

.deco-ink-tl{inset:0;background:radial-gradient(620px 460px at -4% -8%, rgba(35,31,32,.4), transparent 62%);}

/* minimal dark ring motif — high-contrast accent on the soft field */
.deco-rings-ink{width:760px;height:760px;border-radius:50%;right:-300px;bottom:-330px;
  background:repeating-radial-gradient(circle at 50% 50%,transparent 0 53px,rgba(35,31,32,.2) 53px 54.5px);
  -webkit-mask:radial-gradient(circle at 50% 50%,#000 0%,transparent 64%);
          mask:radial-gradient(circle at 50% 50%,#000 0%,transparent 64%);}
.deco-dot-ink{width:9px;height:9px;border-radius:50%;background:var(--dark);
  right:118px;bottom:142px;box-shadow:0 0 0 6px rgba(35,31,32,.06);}

/* ============ MANIFESTO — gallery statement, lots of air ============ */
.manifesto{position:relative;padding:172px 0 152px;text-align:center;background:var(--bg);overflow:hidden;}
.manifesto .wrap{position:relative;z-index:2;max-width:900px;}
.manifesto .eyebrow{display:block;margin-bottom:30px;color:var(--blue-deep);}
.manifesto h2{font-family:var(--nexa);font-weight:800;font-size:clamp(38px,5.8vw,70px);
  line-height:1.03;letter-spacing:-.052em;color:var(--ink);}
.manifesto h2 .accent{color:var(--blue);}
.manifesto .m-lead{margin:36px auto 0;max-width:600px;color:var(--mut);font-weight:200;
  font-size:clamp(17px,1.5vw,20px);line-height:1.7;letter-spacing:0;}
.manifesto .m-rule{width:46px;height:3px;border-radius:999px;background:var(--blue);margin:48px auto 0;}

/* ============ GLOW CARD (dark) — cursor-tracking edge light ============ */
.gcard{position:relative;border:1px solid rgba(255,255,255,.14);border-radius:18px;
  background:rgba(255,255,255,.02);overflow:hidden;
  transition:transform .3s cubic-bezier(.2,.7,.3,1),border-color .3s,box-shadow 2s cubic-bezier(.22,1,.36,1);}
.gcard>*{position:relative;z-index:1;}
.gcard::before{content:"";position:absolute;inset:0;border-radius:inherit;padding:1.6px;pointer-events:none;z-index:2;
  opacity:0;transition:opacity .3s;
  background:radial-gradient(240px 200px at var(--mx,50%) var(--my,50%),rgba(12,192,223,1),rgba(12,192,223,0) 62%);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
  filter:drop-shadow(0 0 5px rgba(12,192,223,.95)) drop-shadow(0 0 14px rgba(12,192,223,.6));}
.gcard:hover{transform:translateY(-8px);border-color:rgba(12,192,223,.55);
  box-shadow:0 30px 60px -28px rgba(0,0,0,.75),0 0 48px -8px rgba(12,192,223,.6);}
.gcard:hover::before{opacity:1;}

/* ============ SUBJECTS — glow cards on dark ============ */
.subj-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(212px,1fr));gap:16px;}
.subj{display:flex;align-items:center;gap:16px;padding:22px 22px;border-radius:18px;}
.subj-ic{width:46px;height:46px;border-radius:13px;border:1px solid rgba(255,255,255,.16);flex:none;
  display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,.05);}
.subj-ic i{width:21px;height:21px;color:var(--blue);}
.subj-body{min-width:0;}
.subj-name{font-family:var(--nexa);font-weight:800;letter-spacing:-.035em;font-size:18px;line-height:1.05;color:var(--paper);}
.subj-meta{font-family:var(--nexa);font-weight:200;font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:rgba(245,242,236,.5);margin-top:5px;}

/* ============ OFFERINGS — white cards on soft paper ============ */
.offer-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.ocard{position:relative;border:1px solid var(--hair);border-radius:22px;padding:38px 32px 34px;
  background:var(--bg);overflow:hidden;box-shadow:0 1px 0 rgba(35,31,32,.03);
  transition:transform .3s cubic-bezier(.2,.7,.3,1),border-color .3s,box-shadow .3s;}
.ocard::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .3s;
  background:radial-gradient(120% 80% at 80% 0%,rgba(12,192,223,.10),transparent 60%);}
.ocard:hover{transform:translateY(-8px);border-color:transparent;box-shadow:0 30px 60px -30px rgba(35,31,32,.35);}
.ocard:hover::before{opacity:1;}
.ocard>*{position:relative;z-index:1;}
.ocard .ic{width:48px;height:48px;border-radius:14px;border:1px solid var(--hair);display:flex;
  align-items:center;justify-content:center;background:var(--bg-soft);}
.ocard .ic i{width:22px;height:22px;color:var(--orange-deep);}
.ocard h3{font-size:23px;margin-top:24px;letter-spacing:-.04em;}
.ocard h3 .accent{color:var(--blue);}
.ocard p{color:var(--mut);font-weight:200;font-size:15px;margin-top:12px;line-height:1.6;letter-spacing:0;}
.ocard .tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:18px;}

/* small pill tag */
.tag{font-family:var(--nexa);font-weight:200;font-size:12.5px;letter-spacing:0;color:var(--ink-soft);
  padding:6px 12px;border-radius:999px;border:1px solid var(--hair);background:var(--bg-soft);white-space:nowrap;}
.oband.dark .tag{color:rgba(245,242,236,.82);border-color:rgba(255,255,255,.16);background:rgba(255,255,255,.04);}

/* ============ TUTORS — auto-drifting glow-card carousel on dark ============ */
.tutor-carousel-wrap{position:relative;}
/* vertical padding gives the hover-lift + glow shadow room so tops aren't clipped */
.tutor-carousel{position:relative;overflow:hidden;padding:20px 0;
  -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 6%,#000 94%,transparent 100%);
          mask-image:linear-gradient(90deg,transparent 0,#000 6%,#000 94%,transparent 100%);}
.tutor-track{display:flex;gap:20px;width:max-content;will-change:transform;touch-action:pan-y;cursor:grab;}
.tutor-track.dragging{cursor:grabbing;}
.tutor-track .tutor{flex:0 0 var(--card-w,300px);}
.tutor{border-radius:20px;display:flex;flex-direction:column;}
/* prev / next controls — live outside the masked viewport so they aren't faded */
.tutor-nav{position:absolute;top:50%;transform:translateY(-50%);z-index:6;
  width:48px;height:48px;border-radius:999px;display:grid;place-items:center;cursor:pointer;
  background:rgba(18,20,26,.72);border:1px solid rgba(255,255,255,.16);color:var(--paper);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  transition:background .2s,border-color .2s,transform .15s;}
.tutor-nav:hover{background:rgba(30,34,42,.95);border-color:rgba(255,255,255,.34);}
.tutor-nav:active{transform:translateY(-50%) scale(.94);}
.tutor-nav.prev{left:-4px;}
.tutor-nav.next{right:-4px;}
.tutor-nav i{width:22px;height:22px;}
@media(max-width:760px){.tutor-nav{width:42px;height:42px;}.tutor-nav.prev{left:2px;}.tutor-nav.next{right:2px;}}
.tutor-photo{position:relative;aspect-ratio:4/5;display:flex;align-items:center;justify-content:center;
  background:repeating-linear-gradient(45deg,rgba(255,255,255,.045) 0 13px,rgba(255,255,255,.02) 13px 26px);
  border-bottom:1px solid rgba(255,255,255,.12);}
.tutor-photo::after{content:"tutor photo";font-family:ui-monospace,"SF Mono",Menlo,monospace;
  font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:rgba(245,242,236,.5);
  background:rgba(255,255,255,.06);padding:6px 12px;border-radius:999px;border:1px solid rgba(255,255,255,.14);}
.tutor-photo img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center top;display:block;z-index:1;}
.tutor-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1;}
.tutor-name{font-family:var(--nexa);font-weight:800;letter-spacing:-.035em;font-size:20px;line-height:1.05;color:var(--paper);}
.tutor-schools{display:flex;align-items:flex-start;gap:8px;margin-top:10px;color:rgba(245,242,236,.62);
  font-weight:200;font-size:13.5px;letter-spacing:0;line-height:1.45;}
.tutor-schools i{width:15px;height:15px;color:var(--blue);flex:none;margin-top:2px;}
.tutor-subjects{display:flex;flex-wrap:wrap;gap:7px;margin-top:18px;padding-top:18px;
  border-top:1px solid rgba(255,255,255,.12);}

/* ============ REVEAL (override resources.css static rule) ============ */
@media (prefers-reduced-motion:no-preference){
  html.anim [data-reveal]{opacity:0;transform:translateY(28px);
    transition:opacity .7s cubic-bezier(.2,.7,.3,1),transform .7s cubic-bezier(.2,.7,.3,1);
    transition-delay:var(--d,0s);will-change:opacity,transform;}
  html.anim [data-reveal].in{opacity:1;transform:none;}
  /* Glow cards (subjects + tutors): reveal as fade-only so the hover lift
     isn't governed by the .7s reveal transition — matches the main page
     student result cards (transform .3s, glow .3s, box-shadow 2s). */
  html.anim .gcard[data-reveal]{transform:none;
    transition:opacity .7s cubic-bezier(.2,.7,.3,1) var(--d,0s),
               transform .3s cubic-bezier(.2,.7,.3,1),
               border-color .3s,
               box-shadow 2s cubic-bezier(.22,1,.36,1);}
  html.anim .gcard[data-reveal].in{opacity:1;transform:none;}
  html.anim .gcard[data-reveal]:hover{transform:translateY(-8px);}
  /* Offering cards: reveal as fade-only so the hover transform isn't governed
     by the .7s reveal transition — matches the index page cards (.3s). */
  html.anim .ocard[data-reveal]{transform:none;
    transition:opacity .7s cubic-bezier(.2,.7,.3,1) var(--d,0s),
               transform .3s cubic-bezier(.2,.7,.3,1),
               border-color .3s,
               box-shadow .3s;}
  html.anim .ocard[data-reveal].in{opacity:1;transform:none;}
  html.anim .ocard[data-reveal]:hover{transform:translateY(-8px);}
}

/* ============ FOOTER — white variant for offerings pages ============ */
footer{background:var(--bg);border-top:1px solid var(--hair);}
.foot .logo{color:var(--ink);}
.foot .logo b{color:var(--blue-deep);}
.foot-links a{color:var(--mut);}
.foot-links a:hover{color:var(--blue-deep);}
.copy{color:var(--mut-2);}

/* ============ RESPONSIVE ============ */
@media(max-width:980px){
  .offer-grid{grid-template-columns:repeat(2,1fr);}
}
@media(max-width:760px){
  .offer-hero{padding:108px 0 52px;}
  .oband{padding:84px 0;}
  .manifesto{padding:104px 0 92px;}
  .oband-head{margin-bottom:46px;}
  .offer-grid{grid-template-columns:1fr;max-width:420px;margin-inline:auto;}
  .subj-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));}
}