/* ============================================================
   TRILUMI — Shared Design System
   Palette: Navy · Carbon Black · Dark Green   |   Fraunces × Satoshi
   ============================================================ */

/* ---------- TOKENS ---------- */
:root {
  --navy:    #0B2545;
  --navy-2:  #13315C;
  --navy-3:  #1D4E89;
  --green:   #0E5C38;
  --green-2: #17794C;
  --mint:    #2DD4A7;
  --carbon:  #0A0C10;

  --bg:      #F5F8FC;
  --surface: #FFFFFF;
  --raised:  #EDF2F8;
  --overlay: #FFFFFF;
  --line:    #DBE3EE;
  --line-2:  #C7D2E0;

  --ink:     #0A0C10;
  --ink-2:   #38465A;
  --ink-3:   #6A788C;
  --on-brand:#F5F8FC;

  --primary: var(--navy);
  --accent:  var(--green);
  --link:    var(--navy-3);
  --signal:  var(--mint);

  --font-display: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-body: 'Satoshi', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-thai: 'Noto Sans Thai', 'Sarabun', var(--font-body);

  --step--1: clamp(0.83rem, 0.80rem + 0.15vw, 0.9rem);
  --step-0:  clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --step-1:  clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
  --step-2:  clamp(1.6rem, 1.4rem + 1vw, 2.1rem);
  --step-3:  clamp(2.1rem, 1.7rem + 2vw, 3rem);
  --step-4:  clamp(2.8rem, 2.1rem + 3.5vw, 4.5rem);
  --step-5:  clamp(3.3rem, 2.3rem + 5vw, 5.75rem);

  --r-sm: 8px; --r-md: 14px; --r-lg: 22px; --r-xl: 30px; --r-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(11,21,45,.06), 0 2px 6px rgba(11,21,45,.04);
  --shadow-md: 0 4px 12px rgba(11,21,45,.08), 0 12px 32px rgba(11,21,45,.06);
  --shadow-lg: 0 12px 40px rgba(11,21,45,.12), 0 24px 70px rgba(11,21,45,.10);
  --ring: 0 0 0 3px rgba(45,212,167,.35);
  --maxw: 1180px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

[data-theme="dark"] {
  --bg:      #121925;   /* lifted slate-navy (was near-black) */
  --surface: #1A2230;
  --raised:  #222C3C;
  --overlay: #1A2230ee;
  --line:    #2C3848;
  --line-2:  #3A4759;

  --ink:     #EDF2F8;
  --ink-2:   #B4C0CE;
  --ink-3:   #8593A3;
  --on-brand:#EDF2F8;

  --primary: var(--mint);
  --accent:  var(--mint);
  --link:    #5FB0F0;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.5);
  --shadow-md: 0 6px 20px rgba(0,0,0,.55);
  --shadow-lg: 0 16px 50px rgba(0,0,0,.65);
  --ring: 0 0 0 3px rgba(45,212,167,.30);
}

/* ---------- RESET / BASE ---------- */
*,*::before,*::after { box-sizing: border-box; margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  font-size: var(--step-0);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background .4s var(--ease), color .4s var(--ease);
  overflow-x: hidden;
}
:lang(th), .th { font-family: var(--font-thai); }
h1,h2,h3,h4,h5 { font-family: var(--font-display); font-weight: 600; line-height: 1.06; letter-spacing: -.02em; color: var(--ink); }
a { color: inherit; text-decoration: none; }
img,video,svg { max-width: 100%; display: block; }
:focus-visible { outline: none; box-shadow: var(--ring); border-radius: var(--r-sm); }

/* ---------- LAYOUT ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(20px,5vw,48px); }
.section { padding: clamp(56px,9vw,116px) 0; }
.section--tight { padding: clamp(40px,6vw,72px) 0; }
.divider { border: 0; border-top: 1px solid var(--line); }
.eyebrow { display:inline-block; font-size: var(--step--1); letter-spacing: .18em; text-transform: uppercase; color: var(--accent); font-weight: 700; }
.lead { font-size: var(--step-1); color: var(--ink-2); font-weight: 400; max-width: 62ch; }
.muted { color: var(--ink-2); }
.center { text-align: center; }
.mx-auto { margin-left:auto; margin-right:auto; }

.d1{font-size:var(--step-1)} .d2{font-size:var(--step-2)} .d3{font-size:var(--step-3)}
.d4{font-size:var(--step-4)} .d5{font-size:var(--step-5)}

.grid { display: grid; gap: clamp(18px,3vw,28px); }
.grid-2 { grid-template-columns: repeat(2,1fr); }
.grid-3 { grid-template-columns: repeat(3,1fr); }
.grid-4 { grid-template-columns: repeat(4,1fr); }
@media (max-width: 900px){ .grid-3,.grid-4 { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 600px){ .grid-2,.grid-3,.grid-4 { grid-template-columns: 1fr; } }

/* two-column split layouts that collapse on mobile */
.split-hero { display: grid; gap: clamp(32px,5vw,56px); grid-template-columns: 1.05fr .95fr; align-items: center; }
.split { display: grid; gap: clamp(32px,5vw,64px); grid-template-columns: .9fr 1.1fr; align-items: start; }
@media (max-width: 860px){ .split-hero, .split { grid-template-columns: 1fr; } }

/* ---------- NAV ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--overlay) 80%, transparent);
  backdrop-filter: saturate(150%) blur(16px);
  -webkit-backdrop-filter: saturate(150%) blur(16px);
  border-bottom: 1px solid var(--line);
}
.nav__bar { display: flex; align-items: center; justify-content: space-between; height: 70px; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-family: var(--font-display); font-weight: 700; font-size: 1.4rem; letter-spacing: -.02em; color: var(--ink); }
.brand__dot { width: 12px; height: 12px; border-radius: 50%; background: linear-gradient(135deg,var(--navy-3),var(--green-2) 55%,var(--mint)); box-shadow: 0 0 0 4px color-mix(in srgb,var(--mint) 16%, transparent); }
.nav__links { display: flex; align-items: center; gap: clamp(14px,2vw,28px); }
.nav__links a { font-size: .95rem; font-weight: 500; color: var(--ink-2); transition: color .2s var(--ease); }
.nav__links a:hover, .nav__links a[aria-current="page"] { color: var(--ink); }
.nav__right { display: flex; align-items: center; gap: 12px; }

.toggle {
  display: inline-grid; place-items: center; width: 40px; height: 40px; cursor: pointer;
  border: 1px solid var(--line-2); background: var(--surface); color: var(--ink);
  border-radius: var(--r-pill); font-size: 1rem; transition: all .25s var(--ease);
}
.toggle:hover { border-color: var(--accent); box-shadow: var(--shadow-sm); }
.hamburger { display: none; width: 42px; height: 42px; border:1px solid var(--line-2); background: var(--surface); border-radius: var(--r-md); cursor: pointer; align-items:center; justify-content:center; flex-direction: column; gap: 4px; }
.hamburger span { width: 18px; height: 2px; background: var(--ink); border-radius: 2px; transition: .25s var(--ease); }
.nav.open .hamburger span:nth-child(1){ transform: translateY(6px) rotate(45deg); }
.nav.open .hamburger span:nth-child(2){ opacity: 0; }
.nav.open .hamburger span:nth-child(3){ transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 860px){
  .hamburger { display: flex; }
  .nav__menu {
    position: fixed; inset: 70px 0 auto 0; background: var(--overlay);
    backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line); box-shadow: var(--shadow-lg);
    flex-direction: column; align-items: stretch; gap: 0; padding: 12px clamp(20px,5vw,48px) 24px;
    transform: translateY(-12px); opacity: 0; pointer-events: none; transition: .28s var(--ease);
  }
  .nav.open .nav__menu { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav__menu .nav__links { flex-direction: column; align-items: stretch; gap: 0; }
  .nav__menu .nav__links a { padding: 14px 4px; border-bottom: 1px solid var(--line); font-size: 1.05rem; }
  .nav__menu .btn { margin-top: 16px; justify-content: center; }
}
.nav__menu { display: flex; align-items: center; gap: clamp(14px,2vw,28px); }

/* ---------- BUTTONS ---------- */
.btn { display: inline-flex; align-items: center; gap: 9px; padding: 13px 24px; border-radius: var(--r-pill); font-family: var(--font-body); font-weight: 700; font-size: .95rem; cursor: pointer; border: 1px solid transparent; transition: all .25s var(--ease); white-space: nowrap; }
.btn--primary { background: var(--primary); color: var(--on-brand); }
[data-theme="dark"] .btn--primary { color: #04231a; }
.btn--primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); filter: brightness(1.06); }
.btn--signal { background: var(--mint); color: #04231a; }
.btn--signal:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--ghost { background: transparent; border-color: var(--line-2); color: var(--ink); }
.btn--ghost:hover { border-color: var(--accent); color: var(--ink); }
.btn--lg { padding: 16px 30px; font-size: 1.02rem; }

/* ---------- CHIPS / BADGES ---------- */
.chip { display: inline-flex; align-items: center; gap: 7px; padding: 6px 14px; border-radius: var(--r-pill); font-size: var(--step--1); font-weight: 600; }
.chip--mint { background: color-mix(in srgb,var(--mint) 18%, transparent); color: var(--green-2); }
[data-theme="dark"] .chip--mint { color: var(--mint); }
.chip--navy { background: color-mix(in srgb,var(--navy-3) 16%, transparent); color: var(--navy); }
[data-theme="dark"] .chip--navy { color: #8fb8ea; }
.chip--line { border: 1px solid var(--line-2); color: var(--ink-2); }

/* ---------- CARDS ---------- */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg); padding: clamp(22px,3vw,30px); box-shadow: var(--shadow-sm); transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease); }
.card--link:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: color-mix(in srgb,var(--accent) 40%, var(--line)); }
.card__ico { width: 50px; height: 50px; border-radius: var(--r-md); display: grid; place-items: center; font-size: 24px; background: color-mix(in srgb,var(--primary) 12%, transparent); margin-bottom: 18px; }
.card h3 { font-size: var(--step-1); margin-bottom: 9px; }
.card p { color: var(--ink-2); font-size: .98rem; }
.card__more { display:inline-flex; align-items:center; gap:6px; margin-top:16px; font-weight:700; font-size:.9rem; color: var(--accent); }
[data-theme="dark"] .card__more { color: var(--mint); }

/* ---------- STATS ---------- */
.stats { display:flex; gap: clamp(24px,4vw,48px); flex-wrap: wrap; }
.stat .stat__n { font-family: var(--font-display); font-size: var(--step-2); color: var(--primary); font-weight: 600; line-height:1; }
.stat .stat__l { font-size: var(--step--1); color: var(--ink-3); margin-top: 6px; }

/* ---------- FORM ---------- */
.field { display: flex; flex-direction: column; gap: 7px; }
.field label { font-size: var(--step--1); font-weight: 600; }
.field input, .field textarea, .field select { padding: 13px 16px; border-radius: var(--r-md); border: 1px solid var(--line-2); background: var(--surface); color: var(--ink); font: inherit; font-size: .98rem; transition: all .2s var(--ease); width: 100%; }
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--accent); box-shadow: var(--ring); }
.inline-form { display: flex; gap: 10px; flex-wrap: wrap; }
.inline-form input { flex: 1; min-width: 220px; }

/* ---------- HERO PANEL ---------- */
.panel-brand {
  background:
    radial-gradient(120% 120% at 85% 10%, color-mix(in srgb,var(--mint) 22%, transparent), transparent 60%),
    linear-gradient(150deg, var(--navy) 0%, #0a1c33 45%, var(--green) 130%);
  color: var(--on-brand); border-radius: var(--r-xl); overflow: hidden;
}
.panel-brand h2, .panel-brand h3 { color: #fff; }

/* ---------- FOOTER ---------- */
.footer { background: var(--carbon); color: #c3ccd6; border-top: 1px solid var(--line); }
[data-theme="dark"] .footer { background: #0D131D; }
.footer .wrap { padding-top: clamp(48px,7vw,80px); padding-bottom: 36px; }
.footer__top { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 36px; }
@media (max-width: 820px){ .footer__top { grid-template-columns: 1fr 1fr; gap: 28px; } }
@media (max-width: 480px){ .footer__top { grid-template-columns: 1fr; } }
.footer .brand { color: #fff; }
.footer h5 { color: #fff; font-family: var(--font-body); font-size: .8rem; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 14px; }
.footer a { color: #aab4bf; font-size: .95rem; display: block; padding: 6px 0; transition: color .2s var(--ease); }
.footer a:hover { color: var(--mint); }
.footer__bottom { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; margin-top: 44px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.1); }
.footer__bottom small { color: #7e8a96; }
.footer__social { display: flex; gap: 10px; }
.footer__social a { width: 38px; height: 38px; border:1px solid rgba(255,255,255,.14); border-radius: 50%; display:grid; place-items:center; padding:0; }
.footer__social a:hover { border-color: var(--mint); background: rgba(45,212,167,.1); }

/* ---------- REVEAL ANIMATION ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce){ .reveal { opacity:1; transform:none; transition:none; } html{scroll-behavior:auto;} }

/* ---------- UTILITIES ---------- */
.stack > * + * { margin-top: var(--s, 1rem); }
.mt-1{margin-top:.5rem} .mt-2{margin-top:1rem} .mt-3{margin-top:1.5rem} .mt-4{margin-top:2rem} .mt-5{margin-top:3rem}
.tag-row { display:flex; gap:10px; flex-wrap:wrap; }
.skip-link { position:absolute; left:-9999px; top:0; background:var(--navy); color:#fff; padding:10px 16px; border-radius:0 0 var(--r-sm) 0; z-index:200; }
.skip-link:focus { left:0; }