/* KlaiKan public web. Tokens = KlaiKan_app/DESIGN.md (light) + dark via prefers-color-scheme.
   No external requests: Noto Sans Thai is self-hosted, no scripts, no analytics. */

@font-face{font-family:"Noto Sans Thai";font-style:normal;font-weight:400 700;font-display:swap;
  src:url("../fonts/noto-sans-thai-thai.woff2") format("woff2");
  unicode-range:U+02D7,U+0303,U+0331,U+0E01-0E5B,U+200C-200D,U+25CC}
@font-face{font-family:"Noto Sans Thai";font-style:normal;font-weight:400 700;font-display:swap;
  src:url("../fonts/noto-sans-thai-latin-ext.woff2") format("woff2");
  unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:"Noto Sans Thai";font-style:normal;font-weight:400 700;font-display:swap;
  src:url("../fonts/noto-sans-thai-latin.woff2") format("woff2");
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}

:root{
  color-scheme:light dark;
  --bg:#FFF9F5;--surface:#FFFFFF;--surface-warm:#FFF0E8;--border:#EBDDD4;
  --ink:#1C1917;--ink-muted:#5F5751;
  --primary:#E4572E;--primary-deep:#B63A17;--primary-soft:#FDE4DA;--amber:#F4A259;
  --success:#1E7F4F;--warning:#B45309;--danger:#B91C1C;--paused:#8A807A;
  --map-trail:rgba(228,87,46,.55);--map-place:rgba(244,162,89,.25);
  --shadow:0 2px 12px rgba(28,25,23,.06);
  --on-primary:#1C1917;
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#141210;--surface:#1F1B18;--surface-warm:#2A221D;--border:#3A312B;
    --ink:#F5EFEA;--ink-muted:#B8ADA4;
    --primary:#F0754F;--primary-deep:#FF9A78;--primary-soft:#3D2419;--amber:#F6B26B;
    --success:#4ADE80;--warning:#FBBF24;--danger:#F87171;--paused:#8A807A;
    --map-trail:rgba(240,117,79,.6);--map-place:rgba(246,178,107,.22);
    --shadow:0 2px 12px rgba(0,0,0,.35);
  }
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);
  font:400 16px/1.6 "Noto Sans Thai",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  overflow-wrap:break-word}
img,svg{max-width:100%;height:auto}
h1,h2,h3{margin:0 0 12px;color:var(--ink)}
h1{font-size:28px;font-weight:700;line-height:1.25}
h2{font-size:22px;font-weight:700;line-height:1.3;margin-top:32px}
h3{font-size:18px;font-weight:700;line-height:1.35}
p,ul,ol{margin:0 0 16px}
ul,ol{padding-left:24px}
a{color:var(--primary-deep);text-underline-offset:3px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--primary-deep);outline-offset:3px;border-radius:6px}
.wrap{max-width:1040px;margin:0 auto;padding:0 16px}
.prose-col{max-width:70ch;margin-left:auto;margin-right:auto}
.muted{color:var(--ink-muted)}
.lead{font-size:18px;line-height:1.6;color:var(--ink-muted)}
.plain{list-style:none;padding:0}
.plain li{padding:8px 0}

.skip{position:absolute;left:8px;top:8px;padding:12px 16px;background:var(--surface);color:var(--ink);
  border:1.5px solid var(--border);border-radius:10px;transform:translateY(-200%)}
.skip:focus{transform:none;z-index:1}

/* header + footer: in the flow, never fixed or sticky (HUB_STANDARD) */
.topbar{border-bottom:1px solid var(--border)}
.bar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px;padding-top:8px;padding-bottom:8px}
.bar-end{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.brand{display:inline-flex;align-items:center;gap:8px;min-height:44px;font-weight:700;font-size:18px;
  color:var(--ink);text-decoration:none}
.hub,.pill-link{display:inline-flex;align-items:center;justify-content:center;gap:4px;min-height:44px;
  padding:0 16px;border-radius:999px;font-size:14px;font-weight:600;white-space:nowrap;
  color:var(--ink);text-decoration:none;box-sizing:border-box}
.hub{background:var(--surface-warm);border:1px solid var(--border)}
.pill-link{border:1.5px solid var(--border);background:var(--surface)}
.hub:hover,.pill-link:hover{border-color:var(--primary-deep)}
.footer{margin-top:96px;padding:32px 0 40px;border-top:1px solid var(--border);background:var(--surface-warm)}
.foot-top{display:flex;flex-wrap:wrap;align-items:center;gap:16px 24px;margin-bottom:16px}
.foot-links{display:flex;flex-wrap:wrap;gap:0 8px;list-style:none;margin:0;padding:0}
.foot-links a{display:inline-flex;align-items:center;min-height:44px;padding:0 8px;color:var(--ink)}
.foot-note{margin:0 0 8px;color:var(--ink-muted);font-size:14px}

/* buttons + link rows: every tap target >= 44 px */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 24px;
  border-radius:14px;font-size:16px;font-weight:600;line-height:1.3;text-decoration:none;
  transition:background-color .15s ease,border-color .15s ease}
.btn-primary{background:var(--primary);color:var(--on-primary);border:1.5px solid var(--primary)}
.btn-primary:hover{background:var(--amber);border-color:var(--amber)}
.btn-secondary{background:var(--surface);color:var(--ink);border:1.5px solid var(--border)}
.btn-secondary:hover{border-color:var(--primary-deep)}
.link-row{display:inline-flex;align-items:center;gap:8px;min-height:44px;font-weight:600}
.link-list{list-style:none;margin:0 0 16px;padding:0}
.icon{flex:none}

/* pages */
.page{padding-top:32px}
.page h2:first-of-type{margin-top:24px}
.narrow-center{text-align:center}
.code{font:700 28px/1.3 "Noto Sans Thai",ui-monospace,Consolas,monospace;letter-spacing:.2em;
  background:var(--surface-warm);border:1px solid var(--border);border-radius:14px;
  display:inline-block;padding:8px 20px;margin:0 0 24px}
.section{padding:48px 0 0}
.section:first-child{padding-top:0}

/* hero */
.hero{padding:32px 0 0}
.hero-grid{display:grid;gap:32px;align-items:center}
.hero h1{font-size:28px;font-weight:700;line-height:1.2}
.cta-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px 16px}
.cta-row .muted{margin:0}
.phone{justify-self:center;width:min(264px,100%);border:8px solid var(--ink);border-radius:36px;
  overflow:clip;background:var(--surface);box-shadow:var(--shadow)}
.mock{display:block;width:100%}
.m-bg{fill:var(--surface)}
.m-park{fill:var(--map-place)}
.m-road{fill:none;stroke:var(--border);stroke-width:14;stroke-linecap:round}
.m-road-s{stroke-width:8}
.m-place{fill:var(--map-place)}
.m-place-text{fill:var(--ink-muted);font-size:13px;font-weight:600}
.m-trail{fill:none;stroke:var(--map-trail);stroke-width:3;stroke-linecap:round}
.m-ring{fill:var(--surface);stroke-width:3}
.ring-ok{stroke:var(--success)}
.ring-live{stroke:var(--amber)}
.m-avatar{fill:var(--primary-soft)}
.m-initial{fill:var(--ink);font-size:16px;font-weight:700}
.m-chip{fill:var(--surface);stroke:var(--border);stroke-width:1}
.m-chip-text{fill:var(--ink);font-size:13px;font-weight:600}
.m-bar{fill:var(--surface);stroke:var(--border);stroke-width:1}
.m-bar-text{fill:var(--ink);font-size:13px;font-weight:600}

/* cards */
.cards{list-style:none;margin:24px 0 0;padding:0;display:grid;gap:16px}
.card{background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:16px;
  box-shadow:var(--shadow)}
.card p{margin:0;color:var(--ink-muted)}
.card-icon{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;
  border-radius:999px;background:var(--primary-soft);color:var(--primary-deep);margin-bottom:8px}
.step-no{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;
  border-radius:999px;background:var(--primary);color:var(--on-primary);font-weight:700;margin-bottom:8px}

/* symmetry */
.sym-grid{display:grid;gap:24px;align-items:center}
.sym{width:100%;max-width:420px;justify-self:center}
.sym-line{stroke:var(--primary-deep);stroke-width:2.5}
.sym-head{fill:var(--primary-deep)}
.sym-node{fill:var(--surface);stroke:var(--primary-deep);stroke-width:2.5}
.sym-name{fill:var(--ink);font-size:14px;font-weight:700}

/* FAQ */
.faq{border-bottom:1px solid var(--border)}
.faq summary{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:56px;
  padding:8px 0;cursor:pointer;font-weight:600;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary .icon{transition:transform .2s ease}
.faq[open] summary .icon{transform:rotate(180deg)}
.faq-a{padding-bottom:12px;color:var(--ink-muted)}

.cta-band{background:var(--surface-warm);border:1px solid var(--border);border-radius:20px;padding:32px 16px;text-align:center}
.cta-band h2{margin-top:0}
.cta-band .cta-row{justify-content:center}

@media (min-width:800px){
  body{line-height:1.6}
  h1{font-size:28px}
  .hero h1{font-size:40px}
  .hero{padding-top:48px}
  .hero-grid{grid-template-columns:1.2fr 1fr}
  .cols-3{grid-template-columns:repeat(3,1fr)}
  .sym-grid{grid-template-columns:1fr 1fr}
  .section{padding-top:48px}
  .cta-band{padding:48px 32px}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}