/* ===========================================================
   THERAINBRINGER — shared design system
   Bold & energetic · light & airy · navy + azure
   =========================================================== */

:root{
  /* Brand */
  --navy-900:#06203f;
  --navy-800:#0a2e5c;
  --navy-700:#0f3d77;
  --navy-600:#16529b;
  --blue-500:#1c8ed4;
  --azure-400:#23a3e0;
  --sky-300:#67d4f4;
  --sky-100:#cdebfa;

  /* Neutrals (cool-tinted) */
  --ink:#0c2444;
  --slate:#4a5e76;
  --slate-soft:#7689a0;
  --paper:#ffffff;
  --mist:#f1f7fc;
  --mist-2:#e7f1fa;
  --line:#dce8f3;

  /* Accent gradient — the logo R */
  --grad-brand:linear-gradient(135deg,#0a3060 0%,#16529b 45%,#23a3e0 100%);
  --grad-sky:linear-gradient(135deg,#23a3e0 0%,#67d4f4 100%);

  --shadow-sm:0 2px 8px rgba(12,36,68,.06);
  --shadow-md:0 14px 40px rgba(12,36,68,.10);
  --shadow-lg:0 34px 80px rgba(10,46,92,.18);

  --r-sm:10px;
  --r-md:18px;
  --r-lg:28px;
  --r-xl:40px;

  --ease:cubic-bezier(.22,.61,.36,1);
  --maxw:1240px;

  --font-display:"Kanit",system-ui,sans-serif;
  --font-body:"Sarabun",system-ui,sans-serif;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--slate);
  background:var(--paper);
  font-size:18px;
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}

h1,h2,h3,h4{
  font-family:var(--font-display);
  color:var(--ink);
  line-height:1.04;
  margin:0;
  font-weight:700;
  letter-spacing:-.01em;
}
p{margin:0;}

.wrap{width:min(100% - 2.6rem,var(--maxw));margin-inline:auto;}
.eyebrow{
  font-family:var(--font-display);
  font-weight:600;
  font-size:.82rem;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--blue-500);
  display:inline-flex;
  align-items:center;
  gap:.6rem;
}
.eyebrow::before{
  content:"";width:26px;height:2px;border-radius:2px;
  background:var(--grad-sky);
}
.lead{font-size:1.18rem;color:var(--slate);max-width:62ch;text-wrap:pretty;}

/* ===== display type scale ===== */
.display{
  font-size:clamp(2.7rem,7.2vw,6rem);
  font-weight:800;
  letter-spacing:-.025em;
  line-height:.98;
  color:var(--ink);
}
.title{
  font-size:clamp(2rem,4.4vw,3.4rem);
  font-weight:700;
  letter-spacing:-.02em;
}
.grad-text{
  background:var(--grad-brand);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}

/* ===========================================================
   Header / nav
   =========================================================== */
.site-header{
  position:sticky;top:0;z-index:60;
  backdrop-filter:saturate(1.4) blur(14px);
  background:rgba(255,255,255,.82);
  border-bottom:1px solid transparent;
  transition:border-color .3s,box-shadow .3s,background .3s;
}
.site-header.scrolled{
  border-bottom-color:var(--line);
  box-shadow:0 6px 24px rgba(12,36,68,.06);
}
.nav{display:flex;align-items:center;gap:1.5rem;height:74px;}
.brand{display:flex;align-items:center;gap:.6rem;margin-right:auto;}
.brand img{height:40px;width:auto;}
.brand b{
  font-family:var(--font-display);font-weight:700;font-size:1.12rem;
  color:var(--ink);letter-spacing:-.01em;line-height:1;
}
.brand b span{color:var(--blue-500);}
.nav-links{display:flex;align-items:center;gap:.3rem;}
.nav-links a{
  font-family:var(--font-display);font-weight:500;font-size:.96rem;
  color:var(--navy-800);padding:.55rem .82rem;border-radius:999px;
  position:relative;transition:color .2s,background .2s;white-space:nowrap;
}
.nav-links a:hover{background:var(--mist);color:var(--navy-900);}
.nav-links a.active{color:var(--blue-500);}
.nav-links a.active::after{
  content:"";position:absolute;left:.82rem;right:.82rem;bottom:.28rem;height:2px;
  background:var(--grad-sky);border-radius:2px;
}
.nav-tools{display:flex;align-items:center;gap:.7rem;}

.lang-toggle{
  display:inline-flex;align-items:center;border:1px solid var(--line);
  border-radius:999px;overflow:hidden;background:#fff;font-family:var(--font-display);
}
.lang-toggle button{
  border:0;background:transparent;cursor:pointer;font-family:inherit;
  font-weight:600;font-size:.82rem;padding:.42rem .7rem;color:var(--slate-soft);
  transition:color .2s;
}
.lang-toggle button.on{background:var(--navy-800);color:#fff;}

.btn{
  --bg:var(--navy-800);
  display:inline-flex;align-items:center;gap:.55rem;cursor:pointer;
  font-family:var(--font-display);font-weight:600;font-size:.98rem;
  padding:.78rem 1.35rem;border-radius:999px;border:0;
  background:var(--bg);color:#fff;transition:transform .25s var(--ease),box-shadow .25s,filter .25s;
  box-shadow:0 10px 26px rgba(12,46,92,.22);
}
.btn:hover{transform:translateY(-2px);filter:brightness(1.06);box-shadow:0 16px 34px rgba(12,46,92,.30);}
.btn .arr{transition:transform .3s var(--ease);}
.btn:hover .arr{transform:translateX(4px);}
.btn-grad{background:var(--grad-brand);}
.btn-ghost{
  background:transparent;color:var(--navy-800);border:1.5px solid var(--line);box-shadow:none;
}
.btn-ghost:hover{border-color:var(--blue-500);color:var(--blue-500);background:#fff;}

.nav-burger{display:none;background:none;border:0;cursor:pointer;padding:8px;}
.nav-burger span{display:block;width:24px;height:2.2px;background:var(--navy-800);border-radius:2px;margin:5px 0;transition:.3s;}

/* mobile nav */
@media(max-width:940px){
  .nav-links{
    position:fixed;inset:74px 0 auto 0;flex-direction:column;align-items:stretch;
    background:#fff;border-bottom:1px solid var(--line);padding:1rem 1.3rem 1.6rem;
    gap:.2rem;transform:translateY(-130%);transition:transform .4s var(--ease);
    box-shadow:var(--shadow-md);
  }
  .nav-links.open{transform:translateY(0);}
  .nav-links a{padding:.85rem 1rem;font-size:1.05rem;}
  .nav-links a.active::after{display:none;}
  .nav-burger{display:block;}
  .nav .btn{display:none;}
}

/* ===========================================================
   Sections / layout
   =========================================================== */
section{position:relative;}
.section{padding:clamp(4rem,9vw,8.5rem) 0;}
.section.tight{padding:clamp(3rem,6vw,5.5rem) 0;}
.bg-mist{background:var(--mist);}
.bg-navy{background:var(--navy-900);color:#cbd9ec;}
.bg-navy h1,.bg-navy h2,.bg-navy h3,.bg-navy h4{color:#fff;}
.bg-grad{background:var(--grad-brand);color:#eaf4fc;}
.bg-grad h1,.bg-grad h2,.bg-grad h3{color:#fff;}

.head{max-width:64ch;}
.head .title{margin:.9rem 0 0;}
.head .lead{margin-top:1.1rem;}
.center{text-align:center;margin-inline:auto;}
.center .eyebrow{justify-content:center;}

.grid{display:grid;gap:1.4rem;}
.cols-2{grid-template-columns:repeat(2,1fr);}
.cols-3{grid-template-columns:repeat(3,1fr);}
.cols-4{grid-template-columns:repeat(4,1fr);}
@media(max-width:960px){.cols-3,.cols-4{grid-template-columns:repeat(2,1fr);}}
@media(max-width:680px){.cols-2,.cols-3,.cols-4{grid-template-columns:1fr;}}

/* ===== cards ===== */
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:2rem;box-shadow:var(--shadow-sm);transition:transform .35s var(--ease),box-shadow .35s,border-color .35s;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:var(--sky-100);}
.card h3{font-size:1.32rem;margin-bottom:.5rem;}
.card p{font-size:1.02rem;}
.icon-badge{
  width:54px;height:54px;border-radius:14px;display:grid;place-items:center;
  background:var(--grad-brand);color:#fff;margin-bottom:1.2rem;box-shadow:0 10px 22px rgba(22,82,155,.28);
}
.icon-badge svg{width:26px;height:26px;}

/* numbered pill */
.num{
  font-family:var(--font-display);font-weight:800;font-size:1rem;color:#fff;
  width:42px;height:42px;border-radius:50%;display:grid;place-items:center;
  background:var(--grad-brand);flex:none;
}

/* stats */
.stat{display:flex;flex-direction:column;gap:.2rem;}
.stat .n{font-family:var(--font-display);font-weight:800;font-size:clamp(2.4rem,5vw,3.6rem);line-height:1;color:var(--ink);}
.bg-navy .stat .n,.bg-grad .stat .n{color:#fff;}
.stat .n .grad-text{display:inline;}
.stat .k{font-size:.95rem;color:var(--slate-soft);letter-spacing:.02em;}
.bg-navy .stat .k,.bg-grad .stat .k{color:#9db8d6;}

/* ===========================================================
   Footer
   =========================================================== */
.site-footer{background:var(--navy-900);color:#9db4d2;padding:4.5rem 0 2.2rem;}
.site-footer h4{color:#fff;font-size:1rem;letter-spacing:.04em;margin-bottom:1.1rem;font-weight:600;}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:2.5rem;}
@media(max-width:860px){.foot-grid{grid-template-columns:1fr 1fr;gap:2rem;}}
@media(max-width:520px){.foot-grid{grid-template-columns:1fr;}}
.site-footer a{color:#9db4d2;transition:color .2s;display:inline-block;padding:.22rem 0;}
.site-footer a:hover{color:var(--sky-300);}
.foot-brand img{height:46px;margin-bottom:1rem;filter:brightness(0) invert(1);opacity:.96;}
.foot-tagline{font-family:var(--font-display);color:#cfe1f4;max-width:30ch;}
.foot-bottom{
  margin-top:3rem;padding-top:1.6rem;border-top:1px solid rgba(255,255,255,.1);
  display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;font-size:.86rem;color:#6f89a8;
}

/* ===========================================================
   Reveal animations
   =========================================================== */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .8s var(--ease),transform .8s var(--ease);}
.reveal.in{opacity:1;transform:none;}
.reveal.d1{transition-delay:.08s;}
.reveal.d2{transition-delay:.16s;}
.reveal.d3{transition-delay:.24s;}
.reveal.d4{transition-delay:.32s;}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
}

/* rain canvas */
.rain-canvas{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;}

/* ===========================================================
   Inner-page shared components
   =========================================================== */
.subhero{position:relative;overflow:hidden;padding:clamp(3.4rem,7vw,6rem) 0 clamp(2.6rem,5vw,4rem);}
.subhero::before{
  content:"";position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(900px 520px at 84% -20%, rgba(103,212,244,.20), transparent 62%),
    var(--mist);
}
.subhero.dark::before{
  background:
    radial-gradient(900px 560px at 80% -10%, rgba(103,212,244,.20), transparent 60%),
    linear-gradient(160deg,#0a2e5c,#06203f);
}
.subhero.dark{color:#cfe1f4;}
.subhero.dark h1,.subhero.dark h2,.subhero.dark .display{color:#fff;}
.subhero .rain-canvas{z-index:1;opacity:.55;}
.subhero .wrap{position:relative;z-index:2;}
.subhero .display{font-size:clamp(2.4rem,6vw,4.8rem);margin:1rem 0 0;}
.subhero .lead{margin-top:1.3rem;}
.crumb{font-family:var(--font-display);font-size:.8rem;letter-spacing:.16em;text-transform:uppercase;color:var(--slate-soft);}
.subhero.dark .crumb{color:#8fb0d6;}

/* media placeholder (abstract) */
.media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;min-height:280px;
  background:
    repeating-linear-gradient(135deg,rgba(22,82,155,.07) 0 14px,rgba(22,82,155,0) 14px 28px),
    linear-gradient(160deg,#eaf3fb,#dbecf8);
  border:1px solid var(--line);display:grid;place-items:center;
}
.media .ml{font-family:"Sarabun",monospace;font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;color:#6f93b8;background:rgba(255,255,255,.7);padding:.4rem .8rem;border-radius:999px;}

/* two-up text+visual */
.feature{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,4.5vw,4.5rem);align-items:center;}
.feature.rev .feature-media{order:-1;}
@media(max-width:860px){.feature{grid-template-columns:1fr;gap:2.2rem;}.feature.rev .feature-media{order:0;}}

/* value list */
.vlist{display:flex;flex-direction:column;gap:1.1rem;}
.vitem{display:flex;gap:1.1rem;align-items:flex-start;}
.vitem .vico{width:44px;height:44px;border-radius:12px;flex:none;display:grid;place-items:center;background:var(--mist-2);color:var(--blue-500);}
.vitem .vico svg{width:22px;height:22px;}
.vitem h4{font-size:1.12rem;margin-bottom:.2rem;}
.vitem p{font-size:1rem;}

/* timeline (story / process) */
.timeline{position:relative;display:flex;flex-direction:column;gap:0;}
.timeline::before{content:"";position:absolute;left:21px;top:8px;bottom:8px;width:2px;background:linear-gradient(180deg,var(--sky-300),var(--mist-2));}
.tstep{position:relative;display:grid;grid-template-columns:44px 1fr;gap:1.4rem;padding:1rem 0 2.2rem;}
.tstep:last-child{padding-bottom:0;}
.tdot{width:44px;height:44px;border-radius:50%;background:var(--grad-brand);color:#fff;display:grid;place-items:center;font-family:var(--font-display);font-weight:800;z-index:1;box-shadow:0 8px 20px rgba(22,82,155,.3);}
.tyear{font-family:var(--font-display);font-weight:600;color:var(--blue-500);font-size:.9rem;letter-spacing:.04em;}
.tstep h3{font-size:1.3rem;margin:.2rem 0 .4rem;}
.tstep p{font-size:1.02rem;max-width:54ch;}

/* process step cards (horizontal connector) */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem;counter-reset:s;}
@media(max-width:900px){.flow{grid-template-columns:repeat(2,1fr);}}
@media(max-width:560px){.flow{grid-template-columns:1fr;}}
.fcard{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:1.7rem;box-shadow:var(--shadow-sm);}
.fcard .fnum{font-family:var(--font-display);font-weight:800;font-size:1rem;color:#fff;width:38px;height:38px;border-radius:50%;background:var(--grad-brand);display:grid;place-items:center;margin-bottom:1rem;}
.fcard h3{font-size:1.16rem;margin-bottom:.4rem;}
.fcard p{font-size:.98rem;}

/* feature/spec chips */
.chips{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1.4rem;}
.chip{font-family:var(--font-display);font-weight:500;font-size:.86rem;padding:.42rem .85rem;border-radius:999px;background:var(--mist-2);color:var(--navy-700);border:1px solid var(--line);}
.bg-navy .chip,.subhero.dark .chip{background:rgba(255,255,255,.08);color:#cfe1f4;border-color:rgba(255,255,255,.16);}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:clamp(2rem,4vw,4rem);align-items:start;}
@media(max-width:840px){.contact-grid{grid-template-columns:1fr;gap:2.4rem;}}
.field{display:flex;flex-direction:column;gap:.4rem;margin-bottom:1.1rem;}
.field label{font-family:var(--font-display);font-weight:500;font-size:.88rem;color:var(--navy-800);}
.field input,.field textarea,.field select{
  font-family:var(--font-body);font-size:1rem;color:var(--ink);
  padding:.85rem 1rem;border:1.5px solid var(--line);border-radius:12px;background:#fff;
  transition:border-color .2s,box-shadow .2s;width:100%;
}
.field textarea{min-height:130px;resize:vertical;}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--blue-500);box-shadow:0 0 0 4px rgba(35,163,224,.14);}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:clamp(1.6rem,3vw,2.4rem);box-shadow:var(--shadow-md);}
.form-ok{display:none;background:#e3f7ee;color:#15795a;border-radius:12px;padding:1rem 1.2rem;font-family:var(--font-display);font-weight:500;margin-top:.4rem;}
.form-ok.show{display:block;}
.cinfo{display:flex;flex-direction:column;gap:1.4rem;}
.cinfo .ci{display:flex;gap:1rem;align-items:flex-start;}
.cinfo .ci .ico{width:46px;height:46px;border-radius:12px;flex:none;display:grid;place-items:center;background:var(--grad-brand);color:#fff;}
.cinfo .ci .ico svg{width:22px;height:22px;}
.cinfo .ci h4{font-size:1.05rem;margin-bottom:.15rem;}
.cinfo .ci p,.cinfo .ci a{font-size:1rem;color:var(--slate);}
.cinfo .ci a:hover{color:var(--blue-500);}