/* ============================================================
   STS Institute — shared stylesheet
   Brand: flame #f38020 · ink #192335 · material white UI
   ============================================================ */

:root{
  --ink:#192335;
  --ink-2:#243250;
  --flame:#f38020;
  --flame-deep:#d96a12;
  --ember:#fff3e8;
  --mist:#f4f6f8;
  --line:#e2e7ee;
  --muted:#5a6b84;
  --paper:#ffffff;

  --e1:0 1px 2px rgba(25,35,53,.06), 0 1px 3px rgba(25,35,53,.05);
  --e2:0 2px 6px rgba(25,35,53,.06), 0 8px 24px rgba(25,35,53,.07);
  --e3:0 4px 10px rgba(25,35,53,.07), 0 18px 44px rgba(25,35,53,.10);

  --shell:1200px;
}

*{-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:"Instrument Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.lock{overflow:hidden}

h1,h2,h3,h4,.display{font-family:"Bricolage Grotesque","Instrument Sans",sans-serif;font-weight:700;letter-spacing:-.02em;line-height:1.05}
.mono{font-family:"IBM Plex Mono",ui-monospace,monospace}

.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:20px}
@media(min-width:1024px){.shell{padding-inline:32px}}

.section{padding-block:72px}
@media(min-width:768px){.section{padding-block:104px}}

/* ---------- Eyebrow + section heading ---------- */
.eyebrow{
  font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--flame);display:inline-flex;align-items:center;gap:10px;
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--flame);display:block}
.eyebrow.on-dark{color:#ffb066}
.eyebrow.on-dark::before{background:#ffb066}

.h-sec{font-size:clamp(28px,4.4vw,46px)}
.lede{color:var(--muted);font-size:clamp(15px,1.6vw,17px);line-height:1.65;max-width:62ch}

/* ---------- Band rail: the signature device ----------
   A 0–9 IELTS band scale used as a structural rule across the site. */
.bandrail{display:flex;align-items:flex-end;gap:6px;height:26px}
.bandrail i{display:block;width:2px;height:7px;background:currentColor;opacity:.28;border-radius:2px}
.bandrail i.maj{height:14px;opacity:.5}
.bandrail i.hit{height:26px;opacity:1;background:var(--flame);width:3px}
.bandrail.tight i{width:2px}

.band-chip{
  font-family:"IBM Plex Mono",monospace;font-size:12px;font-weight:600;
  display:inline-flex;align-items:center;gap:6px;padding:4px 9px;border-radius:999px;
  background:var(--ember);color:var(--flame-deep);border:1px solid #ffd9b8;
}
.band-chip.on-dark{background:rgba(243,128,32,.14);border-color:rgba(243,128,32,.4);color:#ffb066}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 22px;border-radius:10px;font-weight:600;font-size:15px;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--flame);color:#fff;box-shadow:0 6px 18px rgba(243,128,32,.28)}
.btn-primary:hover{background:var(--flame-deep);box-shadow:0 10px 26px rgba(243,128,32,.34)}
.btn-ink{background:var(--ink);color:#fff}
.btn-ink:hover{background:var(--ink-2)}
.btn-ghost{border-color:var(--line);color:var(--ink);background:#fff}
.btn-ghost:hover{border-color:var(--ink);background:var(--mist)}
.btn-glass{border-color:rgba(255,255,255,.34);color:#fff;background:rgba(255,255,255,.08);backdrop-filter:blur(8px)}
.btn-glass:hover{background:rgba(255,255,255,.16)}
.btn-sm{padding:9px 15px;font-size:13.5px;border-radius:8px}

a,button{outline-offset:3px}
:focus-visible{outline:2.5px solid var(--flame);outline-offset:3px;border-radius:4px}

/* ---------- Cards ---------- */
.card{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--e1);transition:box-shadow .22s ease,transform .22s ease,border-color .22s ease}
.card:hover{box-shadow:var(--e2);transform:translateY(-3px);border-color:#d3dbe6}
.card-flat{background:#fff;border:1px solid var(--line);border-radius:14px}

/* Card media (image) used in services */
.card-media{width:100%;height:auto;flex:0 0 auto;overflow:hidden;border-radius:12px}
.card-media img{width:100%;height:100%;object-fit:cover;display:block}

/* ---------- Photo slot: real image if present, designed fallback if not ---------- */
.ph{position:relative;overflow:hidden;background:linear-gradient(135deg,#22304a 0%,#192335 58%,#2b1c0c 100%);isolation:isolate}
.ph::after{
  content:attr(data-label);position:absolute;left:14px;bottom:12px;z-index:1;
  font-family:"IBM Plex Mono",monospace;font-size:10px;letter-spacing:.16em;text-transform:uppercase;
  color:rgba(255,255,255,.62);
}
.ph::before{
  content:"";position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(120% 90% at 88% 8%, rgba(243,128,32,.42), transparent 60%),
    repeating-linear-gradient(90deg, rgba(255,255,255,.09) 0 1px, transparent 1px 22px);
}
.ph img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:2}

/* ---------- Skip link ---------- */
.skip{position:absolute;left:-9999px;top:0;z-index:100;background:var(--flame);color:#fff;padding:10px 16px;border-radius:0 0 8px 0;font-weight:600}
.skip:focus{left:0}

/* ---------- Header / nav ---------- */
.topbar{background:var(--ink);color:#c8d2e2;font-size:12.5px}
.topbar a{transition:color .16s}
.topbar a:hover{color:#fff}
.topbar-inner{min-height:34px;padding-block:7px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.topbar-links{display:flex;align-items:center;gap:18px;flex-shrink:0}

.nav{position:sticky;top:0;z-index:60;transition:background .28s ease,box-shadow .28s ease,border-color .28s ease}
.nav-solid{background:#fff;border-bottom:1px solid var(--line)}
.nav-solid.stuck{box-shadow:var(--e1)}
.nav-over{position:relative;left:0;right:0;background:transparent;border-bottom:1px solid rgba(255,255,255,.14)}
.nav-over.stuck{position:fixed;top:0;background:rgba(25,35,53,.94);backdrop-filter:blur(12px);border-bottom-color:transparent;box-shadow:0 8px 30px rgba(25,35,53,.28)}
.nav-over .navlink{color:#eaf0f8}
.nav-over .navlink:hover{color:#fff}
.nav-over .burger span{background:#fff}
.nav-inner{min-height:68px;padding-block:10px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.nav-inner>a{display:flex;align-items:center;flex:0 0 auto;min-width:0}
.brand-logo{display:block;width:auto;height:44px;max-width:142px;object-fit:contain}
.nav-list{display:none;align-items:center;gap:clamp(18px,2.1vw,34px);min-width:0}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
@media(min-width:1024px){.nav-list{display:flex}.nav-actions .btn{padding-inline:18px}}
@media(max-width:767px){
  .topbar-inner{min-height:32px;padding-block:6px}
  .topbar .mono{max-width:210px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .nav-inner{min-height:62px;padding-block:9px}
  .brand-logo{height:38px;max-width:122px}
}
@media(min-width:1280px){.brand-logo{height:48px;max-width:154px}}

.navlink{position:relative;font-size:14.5px;font-weight:500;color:var(--ink);padding:8px 2px;display:inline-flex;align-items:center;gap:5px}
.navlink::after{content:"";position:absolute;left:0;right:100%;bottom:2px;height:2px;background:var(--flame);transition:right .24s ease}
.navlink:hover::after,.navlink[aria-current="page"]::after{right:0}

.dropdown{position:absolute;top:100%;left:0;min-width:240px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--e3);padding:8px;opacity:0;visibility:hidden;transform:translateY(6px);transition:.18s ease}
.has-drop:hover .dropdown,.has-drop:focus-within .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown a{display:block;padding:9px 12px;border-radius:8px;font-size:14px;color:var(--ink)}
.dropdown a:hover{background:var(--ember);color:var(--flame-deep)}

.burger{width:26px;height:18px;position:relative;display:block}
.burger span{position:absolute;left:0;height:2px;width:100%;background:var(--ink);border-radius:2px;transition:.25s ease}
.burger span:nth-child(1){top:0}
.burger span:nth-child(2){top:8px}
.burger span:nth-child(3){top:16px}
.burger.open span:nth-child(1){top:8px;transform:rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){top:8px;transform:rotate(-45deg)}

.drawer{position:fixed;inset:0;z-index:70;background:var(--ink);transform:translateX(100%);transition:transform .34s cubic-bezier(.4,0,.2,1);overflow-y:auto}
.drawer.open{transform:translateX(0)}
.drawer a{color:#eaf0f8}

/* ---------- Hero video stage ---------- */
.stage{position:relative;min-height:640px;min-height:100svh;min-height:100vh;background:var(--ink);overflow:hidden;display:flex;align-items:flex-start}
.hero-content{position:relative;z-index:10;width:100%;display:flex;align-items:flex-start;justify-content:flex-start;padding:140px 24px 40px}
.hero-copy{position:relative;z-index:10;max-width:520px;width:min(100%,520px);pointer-events:auto;padding:36px 30px 42px;background:rgba(1,11,22,.62);backdrop-filter:blur(14px);border:1px solid rgba(255,255,255,.08);border-radius:28px}
.hero-copy h1{color:#fff;text-shadow:0 20px 60px rgba(0,0,0,.35)}
.hero-copy p{color:rgba(255,255,255,.92)}
.hero-copy .eyebrow{color:rgba(255,163,0,.96);letter-spacing:.22em}
@media(min-width:1024px){.stage{max-height:940px}}
.stage-scrim{position:absolute;inset:0;z-index:2;pointer-events:none;
  background:linear-gradient(90deg,rgba(3,9,18,.56) 0%,rgba(3,9,18,.32) 42%,rgba(3,9,18,.1) 70%,rgba(3,9,18,.4) 100%),
    linear-gradient(180deg,rgba(15,22,36,.38) 0%,rgba(15,22,36,.16) 36%,rgba(15,22,36,.58) 100%);
}
.hero-video{position:absolute;inset:0;width:100%;height:100%;overflow:hidden;background:#000;z-index:1;pointer-events:none}
.hero-video video{
  position:absolute;top:50%;left:50%;width:100%;height:100%;min-width:100%;min-height:100%;object-fit:cover;
  transform:translate(-50%,-50%);border:0;filter:brightness(.88) saturate(1.05);
}
@media(max-width:767px){
  .hero-content{padding:120px 18px 30px}
  .hero-copy{max-width:100%;padding:28px 24px 34px}
}

/* Animated fallback "film" that plays when no video file is present */
.filmstrip{position:absolute;inset:0;z-index:1;overflow:hidden}
.filmstrip .layer{position:absolute;inset:-10%;opacity:0;animation:filmcycle 24s infinite}
.filmstrip .layer:nth-child(1){animation-delay:0s}
.filmstrip .layer:nth-child(2){animation-delay:6s}
.filmstrip .layer:nth-child(3){animation-delay:12s}
.filmstrip .layer:nth-child(4){animation-delay:18s}
@keyframes filmcycle{
  0%{opacity:0;transform:scale(1.04)}
  6%{opacity:1}
  25%{opacity:1;transform:scale(1.14)}
  31%{opacity:0;transform:scale(1.16)}
  100%{opacity:0}
}
.grid-drift{position:absolute;inset:-20%;z-index:1;opacity:.3;
  background-image:linear-gradient(rgba(255,255,255,.13) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.13) 1px,transparent 1px);
  background-size:64px 64px;animation:drift 34s linear infinite}
@keyframes drift{to{transform:translate3d(64px,64px,0)}}

.ticker-word{display:inline-block;color:var(--flame)}

/* ---------- Journey rail ---------- */
.rail{position:relative}
.rail::before{content:"";position:absolute;left:0;right:0;top:38px;height:2px;background:var(--line)}
.rail-fill{position:absolute;left:0;top:38px;height:2px;background:var(--flame);width:0;transition:width 1.4s cubic-bezier(.2,.7,.3,1)}
.stop-dot{width:14px;height:14px;border-radius:50%;background:#fff;border:3px solid var(--line);position:relative;z-index:2;transition:.3s}
.stop.is-on .stop-dot{border-color:var(--flame);box-shadow:0 0 0 5px rgba(243,128,32,.16)}

/* ---------- Stair steps (approach) ---------- */
.stair{border:1px solid var(--line);border-radius:14px;background:#fff;box-shadow:var(--e1);transition:.25s}
.stair:hover{box-shadow:var(--e2);transform:translateY(-4px)}
.stair .num{font-family:"IBM Plex Mono",monospace;font-size:12px;letter-spacing:.14em;color:var(--flame)}

/* ---------- Stat bars ---------- */
.meter{height:8px;border-radius:99px;background:var(--line);overflow:hidden}
.meter i{display:block;height:100%;width:0;border-radius:99px;background:linear-gradient(90deg,var(--flame),#ffab5c);transition:width 1.5s cubic-bezier(.2,.7,.3,1)}

/* ---------- Marquee ---------- */
.marquee{display:flex;gap:56px;width:max-content;animation:slide 34s linear infinite}
@keyframes slide{to{transform:translateX(-50%)}}
.marquee-mask{mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}

/* ---------- Reveal ---------- */
[data-reveal]{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.3,1)}
[data-reveal].in{opacity:1;transform:none}

/* ---------- Forms ---------- */
.field{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:#fff;font-size:15px;color:var(--ink);transition:.18s}
.field::placeholder{color:#9aa8bd}
.field:focus{border-color:var(--flame);box-shadow:0 0 0 4px rgba(243,128,32,.14);outline:none}
.label{display:block;font-size:13px;font-weight:600;margin-bottom:7px;color:var(--ink)}
.hint{font-size:12.5px;color:var(--muted);margin-top:6px}

.pick{display:block;cursor:pointer;border:1px solid var(--line);border-radius:12px;padding:14px;transition:.18s;background:#fff}
.pick:hover{border-color:#c3cede}
.pick input{position:absolute;opacity:0;pointer-events:none}
.card-thumb{width:100%;height:auto;overflow:hidden;border-radius:10px;background:#f3f4f6}
.card-thumb img{width:100%;height:auto;object-fit:cover;display:block}
.pick:has(input:checked){border-color:var(--flame);background:var(--ember);box-shadow:0 0 0 3px rgba(243,128,32,.12)}

/* ---------- Accordion ---------- */
.acc summary{list-style:none;cursor:pointer}
.acc summary::-webkit-details-marker{display:none}
.acc[open] .chev{transform:rotate(180deg)}
.chev{transition:transform .22s ease}

/* ---------- Prose (blog article) ---------- */
.prose{font-size:17px;line-height:1.78;color:#2c3a52}
.prose h2{font-size:26px;margin-top:2.1em;margin-bottom:.55em;color:var(--ink)}
.prose h3{font-size:20px;margin-top:1.7em;margin-bottom:.45em;color:var(--ink)}
.prose p{margin-bottom:1.15em}
.prose ul,.prose ol{margin:0 0 1.2em 1.15em;display:grid;gap:.5em}
.prose ul{list-style:disc}
.prose ol{list-style:decimal}
.prose strong{color:var(--ink);font-weight:650}
.prose blockquote{border-left:3px solid var(--flame);background:var(--ember);padding:16px 20px;border-radius:0 10px 10px 0;margin:1.6em 0;font-size:17.5px;color:var(--ink)}
.prose a{color:var(--flame-deep);text-decoration:underline;text-underline-offset:3px}

/* ---------- Footer ---------- */
.foot a{color:#b9c5d8;transition:color .16s}
.foot a:hover{color:var(--flame)}

/* ---------- Utility ---------- */
.hairline{height:1px;background:var(--line)}
.noscroll::-webkit-scrollbar{display:none}
.noscroll{scrollbar-width:none}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  [data-reveal]{opacity:1;transform:none}
}