/* berkbanjai — shared core styles
   Single source of truth for tokens, base type, header/footer chrome,
   buttons, reveal animation, i18n, and shared responsive rules.
   Page-specific component CSS stays inline in each page's <style>. */

/* tokens */
:root{
  --blue:#4eb1c2; --blue-d:#348da0; --sky:#a6dde7; --cloud:#DFF4FC; --cloud-2:#eef8fd;
  --navy:#1f3f56; --ink:#244055; --muted:#5f7a8c; --faint:#9bb3c2;
  --sun:#ff914d; --sun-soft:#ffd6ba; --line:#e4f0f8; --white:#fff;
  --maxw:1200px; --r:22px;
  --sans:"Montserrat","Anuphan",-apple-system,sans-serif; --thai:"Anuphan","Montserrat",sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* reset + base */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scroll-padding-top:94px}
body{font-family:var(--sans);color:var(--ink);background:#fbfdff;line-height:1.65;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}
html:lang(th) body{font-family:var(--thai)}
.th{font-family:var(--thai)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 32px}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{color:var(--navy);font-weight:800;letter-spacing:-.025em;line-height:1.07}
::selection{background:var(--sky);color:var(--navy)}
:focus-visible{outline:2.5px solid var(--blue);outline-offset:3px}
:focus:not(:focus-visible){outline:none}
.langtog button:focus-visible{outline:2px solid var(--navy);outline-offset:-3px}
.band :focus-visible,.shero :focus-visible,.practice :focus-visible,.cat :focus-visible,.final :focus-visible,footer :focus-visible{outline-color:#b1e3ee}
main:focus{outline:none}
.skip{position:fixed;top:0;left:14px;z-index:200;transform:translateY(-130%);background:var(--blue);color:#fff;font-weight:600;font-size:14px;padding:11px 20px;border-radius:0 0 14px 14px;box-shadow:0 14px 32px -10px rgba(31,63,86,.55);transition:transform .25s var(--ease)}
.skip:focus{transform:translateY(0);outline:none}

/* atmosphere */
.atmos{position:fixed;inset:0;z-index:-2;pointer-events:none;background:
  radial-gradient(58% 48% at 84% 2%,rgba(143,213,244,.42),transparent 60%),
  radial-gradient(48% 42% at 6% 16%,rgba(223,244,252,.9),transparent 65%),
  radial-gradient(55% 50% at 96% 80%,rgba(255,145,77,.07),transparent 60%),
  linear-gradient(180deg,#f2f9fe,#fbfdff 28%)}
.grain{position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.5;mix-blend-mode:soft-light;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E")}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:10px;font-weight:600;font-size:15px;padding:15px 31px;border-radius:999px;border:1.5px solid transparent;cursor:pointer;transition:.3s var(--ease)}
.btn svg{width:17px;height:17px}
.btn-primary{background:linear-gradient(180deg,#62becd,#4eb1c2 52%,#3ba9bc);color:#fff;box-shadow:0 18px 40px -16px rgba(78,177,194,.6),inset 0 1px 0 rgba(255,255,255,.38)}
.btn-primary:hover{background:linear-gradient(180deg,#4eb1c2,#3394a7);transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.7);color:var(--navy);border-color:var(--line);backdrop-filter:blur(6px)}
.btn-ghost:hover{border-color:var(--sky);color:var(--blue);transform:translateY(-2px)}

/* eyebrow */
.eyebrow{display:inline-flex;align-items:center;gap:12px;font-size:11.5px;font-weight:600;letter-spacing:.3em;text-transform:uppercase;color:var(--blue)}
.eyebrow::before{content:"";width:30px;height:1.5px;border-radius:2px;background:linear-gradient(90deg,transparent,var(--sun))}
.eyebrow::after{content:"";width:30px;height:1.5px;border-radius:2px;background:linear-gradient(90deg,var(--sun),transparent)}

/* reveal-on-scroll */
.reveal{opacity:0;transform:translateY(26px);filter:blur(5px);transition:opacity .8s var(--ease),transform .9s var(--ease),filter .9s var(--ease)}
.reveal.in{opacity:1;transform:none;filter:none}
.d1{transition-delay:.08s}.d2{transition-delay:.16s}.d3{transition-delay:.24s}.d4{transition-delay:.32s}.d5{transition-delay:.4s}

/* breadcrumb */
.crumb{display:inline-block;font-size:13px;color:var(--faint);font-weight:600;letter-spacing:.02em}
.crumb:hover{color:var(--blue)}

/* header / nav */
header{position:sticky;top:0;z-index:60;transition:.3s}
header.scrolled{background:rgba(251,253,255,.86);backdrop-filter:blur(18px) saturate(1.4);border-bottom:1px solid var(--line);box-shadow:0 8px 30px -22px rgba(31,63,86,.3)}
.nav{display:flex;align-items:center;justify-content:space-between;height:78px}
.brand{display:flex;align-items:center;gap:12px}
.brand .mark{width:44px;height:44px}
.brand .name{font-weight:700;font-size:18px;letter-spacing:.18em;color:var(--navy);line-height:1;font-family:var(--sans)}
.brand .name small{display:block;font-family:var(--thai);font-weight:500;font-size:13px;letter-spacing:.12em;color:var(--blue);margin-top:3px}
.links{display:flex;align-items:center;gap:25px}
.links a{position:relative;font-weight:500;font-size:15px;color:var(--navy);padding:4px 0}
.links a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;border-radius:2px;background:var(--blue);transition:.25s var(--ease)}
.links a:hover{color:var(--blue)}
.links a:hover::after{width:100%}
.links a.active{color:var(--blue)}.links a.active::after{width:100%}
.nav-right{display:flex;align-items:center;gap:16px}
.burger{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:#fff;align-items:center;justify-content:center;cursor:pointer}
.burger svg{width:22px;height:22px;stroke:var(--navy)}
.mmenu{position:fixed;left:0;right:0;top:78px;z-index:55;background:rgba(251,253,255,.97);backdrop-filter:blur(16px);border-bottom:1px solid var(--line);padding:14px 22px 24px;display:none;flex-direction:column;box-shadow:0 24px 40px -28px rgba(31,63,86,.5)}
.mmenu a{font-size:18px;font-weight:600;color:var(--navy);padding:15px 2px;border-bottom:1px solid var(--line)}
body.menu-open .mmenu{display:flex}
.langtog{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:999px;overflow:hidden;background:#fff}
.langtog button{border:0;background:none;font:600 12.5px/1 var(--sans);letter-spacing:.04em;padding:7px 13px;cursor:pointer;color:var(--faint);transition:.25s}
.langtog button.thai{font-family:var(--thai)}
.langtog button.on{background:var(--blue);color:#fff}
.mmenu .langtog{margin-top:18px;align-self:flex-start}

/* i18n (Thai-first) */
.L.en{display:none}
html[lang="en"] .L.th{display:none}
html[lang="en"] .L.en{display:inline}
html[lang="th"] .eyebrow,html[lang="th"] .kic,html[lang="th"] footer h2{letter-spacing:.04em;text-transform:none}
html[lang="th"] h1,html[lang="th"] h2{letter-spacing:0}
html[lang="th"] .it{font-style:normal}

/* shared section bits */
.sec-head .eyebrow{justify-content:center}
.final .cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:30px}
.final .btn-primary{background:#fff;color:var(--blue);box-shadow:0 16px 32px -14px rgba(0,0,0,.35)}
.final .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.65)}
.final .btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.12);color:#fff}

/* footer */
footer{position:relative;background:#13293a;color:rgba(255,255,255,.66);padding:88px 0 40px;margin-top:74px}
footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(255,145,77,.45),transparent)}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.foot-brand .fb{display:flex;align-items:center;gap:11px;margin-bottom:16px}
.foot-brand .fb .name{color:#fff;font-weight:800;font-size:18px;letter-spacing:.03em}
.foot-brand p{font-size:14.5px;max-width:30ch;line-height:1.7}
footer h2{color:rgba(255,255,255,.92);font-size:12px;font-weight:600;letter-spacing:.2em;text-transform:uppercase;margin-bottom:20px}
footer .col a{display:block;font-size:14.5px;color:rgba(255,255,255,.66);margin-bottom:12px;transition:.2s}
footer .col a:hover{color:#fff;padding-left:3px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:56px;padding-top:28px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px;letter-spacing:.02em;color:rgba(255,255,255,.5)}
.foot-bottom a{color:inherit;border-bottom:1px solid rgba(255,255,255,.28);transition:.2s}
.foot-bottom a:hover{color:#fff;border-color:rgba(255,255,255,.7)}

/* responsive — shared chrome */
@media(max-width:920px){
  .wrap{padding:0 22px}
  .links,.nav-right .langtog{display:none}.burger{display:flex}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:560px){
  .nav-right .btn-primary{display:none}
  .final .cta-row{flex-direction:column;align-items:stretch}.final .cta-row .btn{justify-content:center}
  .eyebrow{font-size:12px}
  footer .col a{padding:4px 0;margin-bottom:6px}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition-duration:.01ms!important}.reveal{opacity:1;transform:none;filter:none}}

/* brand logo image (header) */
.brand-logo{height:46px;width:auto;display:block}
/* orange CI conversion button (btn-sun) */
.btn-sun{background:linear-gradient(180deg,#ffb384,#ff914d 55%,#f87d39);color:#fff;box-shadow:0 14px 30px -12px rgba(255,145,77,.6),inset 0 1px 0 rgba(255,255,255,.4)}
.btn-sun:hover{background:linear-gradient(180deg,#ff914d,#f8742b);transform:translateY(-2px);color:#fff}
.nav-right .btn-sun{padding:12px 22px;font-size:14.5px}
/* mobile-menu conversion item */
.mmenu a.mm-cta{margin-top:8px;background:linear-gradient(180deg,#ffb384,#ff914d 55%,#f87d39);color:#fff;border-bottom:0;border-radius:14px;text-align:center;padding:15px;box-shadow:0 14px 30px -14px rgba(255,145,77,.5)}
@media(max-width:560px){
  .brand-logo{height:40px}
  .nav-right .btn-sun{padding:10px 15px;font-size:13.5px}
}