/* Shared design tokens, reset and components (light theme, blue accent).
   Used by the handbook and by the Ask & share board. The design is
   deliberately light-only, so there are no dark-mode overrides. */

:root{
  color-scheme:light;
  --bg:#F6F8FC; --surface:#FFFFFF; --sunken:#F1F4FA; --tint:#EEF4FF; --tint-strong:#DCE8FF;
  --ink:#13213A; --muted:#55627A; --faint:#8D99AE; --line:#E2E8F2; --line-strong:#CBD5E5;
  --primary:#2457D6; --primary-strong:#1A44AE; --primary-ink:#FFFFFF; --primary-soft:#EAF1FE;
  --link:#2457D6;
  /* Green is teal #31AAA9 for fills, tints, borders and icons; --done-ink, a darker shade
     of the same teal, is used for text and white-text buttons so they stay readable. */
  --done:#31AAA9; --done-ink:#1E7574; --done-soft:#E8F6F6; --done-line:#B5E1E0;
  --accent:#B45309; --accent-soft:#FEF6E7; --accent-line:#F2D7A6;
  --warn:#A82020; --warn-soft:#FBEDED; --warn-line:#EDBDBD;
  --code:#F4F7FC;
  /* Gradients for filled elements. Both ends keep white text at 4.5:1 or better. */
  --grad-primary:linear-gradient(135deg,#3268E3 0%,#1A44AE 100%);
  --grad-primary-hover:linear-gradient(135deg,#2A5BD0 0%,#14398F 100%);
  --grad-done:linear-gradient(135deg,#31AAA9 0%,#1E7574 100%);
  --grad-warn:linear-gradient(135deg,#A82020 0%,#7E1616 100%);
  --grad-accent:linear-gradient(135deg,#AD5C08 0%,#7F3A07 100%);
  --shadow-sm:0 1px 2px rgba(19,33,58,.05);
  --shadow:0 1px 2px rgba(19,33,58,.04), 0 6px 20px rgba(19,33,58,.06);
  --shadow-lg:0 14px 40px rgba(19,33,58,.12);
  /* Latin letters use Plus Jakarta Sans; Thai letters fall through to Anuphan. */
  --font-head:"Plus Jakarta Sans", "Anuphan", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body:"Plus Jakarta Sans", "Anuphan", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono:"JetBrains Mono", "Anuphan", ui-monospace, Consolas, "Courier New", monospace;
  --radius:16px; --radius-sm:10px;
}

/* ---------- reset & base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:84px}
@media (prefers-reduced-motion: no-preference){html{scroll-behavior:smooth}}
:root{padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%}
[hidden]{display:none!important}
h1,h2,h3,h4{font-family:var(--font-head);line-height:1.25;margin:0;text-wrap:balance;letter-spacing:-0.015em;font-weight:700;color:var(--ink)}
h1{font-size:clamp(1.8rem,3.6vw,2.4rem);letter-spacing:-0.025em}
h2{font-size:1.35rem}
h3{font-size:1.05rem;font-weight:600}
p{margin:0}
a{color:var(--link);text-underline-offset:3px}
a:hover{color:var(--primary-strong)}
:focus-visible{outline:2.5px solid var(--primary);outline-offset:2px;border-radius:6px}
@media (prefers-reduced-motion: reduce){*{transition:none!important;animation:none!important}}
.muted{color:var(--muted)}
.small{font-size:.875rem}
.label{font-family:var(--font-head);font-size:.74rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--primary)}

/* ---------- icons ---------- */
.i{width:20px;height:20px;flex:none;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-weight:600;font-size:.94rem;padding:10px 18px;border-radius:var(--radius-sm);border:1px solid transparent;background:var(--grad-primary);color:var(--primary-ink);cursor:pointer;text-decoration:none;box-shadow:none}
.btn:hover{background:var(--grad-primary-hover);color:var(--primary-ink)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn .i{width:18px;height:18px}
.btn.secondary{background:var(--surface);color:var(--ink);border-color:var(--line)}
.btn.secondary:hover{border-color:var(--primary);color:var(--primary)}
.btn-sm{font:inherit;font-size:.82rem;padding:5px 11px;border-radius:8px;border:1px solid var(--line);background:var(--surface);color:var(--muted);cursor:pointer}
.btn-sm:hover{color:var(--primary);border-color:var(--primary)}
.btn-sm.danger{color:var(--warn);border-color:var(--warn-line)}
.icon-btn{display:inline-grid;place-items:center;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer;text-decoration:none}
.icon-btn:hover{color:var(--primary);border-color:var(--primary)}

/* ---------- chips ---------- */
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{font:inherit;font-size:.86rem;font-weight:500;padding:6px 14px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer;text-decoration:none}
.chip:hover{border-color:var(--primary);color:var(--primary)}
.chip[aria-pressed="true"]{background:var(--grad-primary);border-color:transparent;color:var(--primary-ink)}
.tag{display:inline-flex;align-items:center;gap:5px;font-size:.76rem;font-weight:500;padding:3px 10px;border-radius:999px;background:var(--tint);color:var(--primary)}
.tag .i{width:14px;height:14px}

/* ---------- form fields ---------- */
.field{display:grid;gap:6px}
.field label{font-size:.88rem;font-weight:600}
.field label em{font-style:normal;font-weight:400;color:var(--muted)}
.field input,.field textarea,.field select,.input{font:inherit;font-size:.95rem;padding:10px 13px;border:1px solid var(--line-strong);border-radius:var(--radius-sm);background:var(--surface);color:var(--ink);width:100%}
.field input:focus,.field textarea:focus,.field select:focus,.input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px var(--primary-soft)}
.field textarea{resize:vertical;min-height:76px}
.search-box{position:relative;display:flex;align-items:center}
.search-box .i{position:absolute;left:13px;top:50%;transform:translateY(-50%);color:var(--muted);pointer-events:none}
.search-box input{padding-left:42px}

/* ---------- prompt box (copyable) ---------- */
.promptbox{position:relative;background:var(--code);border:1px solid var(--line);border-radius:var(--radius-sm);padding:14px 16px;padding-right:88px}
.promptbox pre{margin:0;font-family:var(--font-mono);font-size:.82rem;line-height:1.7;white-space:pre-wrap;word-break:break-word;color:var(--ink)}
.copy{position:absolute;top:10px;right:10px;font:inherit;font-size:.78rem;font-weight:600;padding:5px 11px;border-radius:8px;border:1px solid var(--line);background:var(--surface);color:var(--primary);cursor:pointer}
.copy:hover{border-color:var(--primary)}
.copy.done{background:var(--done-ink);border-color:var(--done-ink);color:#fff}

/* ---------- callouts ---------- */
/* Alerts on soft tinted backgrounds: tip = amber, warning = red, info = blue. */
.callout{border:1px solid var(--accent-line);background:var(--accent-soft);border-radius:12px;padding:14px 16px;font-size:.95rem}
.callout .callout-title{display:block;font-weight:700;margin-bottom:2px;color:var(--accent)}
.callout.warn{border-color:var(--warn-line);background:var(--warn-soft)}
.callout.warn .callout-title{color:var(--warn)}
.callout.info{border-color:var(--tint-strong);background:var(--tint)}
.callout.info .callout-title{color:var(--primary)}

/* ---------- status pills ---------- */
.status-pill{display:inline-flex;align-items:center;gap:6px;font-size:.84rem;font-weight:500;color:var(--muted);white-space:nowrap}
.status-pill .dot{width:8px;height:8px;border-radius:50%;background:var(--faint)}
.status-pill.done{color:var(--done-ink)} .status-pill.done .dot{background:var(--done)}
.status-pill.next{color:var(--primary)} .status-pill.next .dot{background:var(--primary)}

/* ---------- Thai ---------- */
/* Thai needs more line height for vowels and tone marks, and no letter-spacing. */
html[lang="th"] body{line-height:1.8}
html[lang="th"] h1,html[lang="th"] h2,html[lang="th"] h3,html[lang="th"] h4{line-height:1.45;letter-spacing:0}
html[lang="th"] .label{letter-spacing:0;text-transform:none;font-size:.82rem}

/* ---------- touch screens ---------- */
/* Bigger tap targets on phones and tablets; mouse layouts are unchanged. */
@media (pointer: coarse){
  .chip,.btn-sm,.copy{min-height:36px}
  .btn{min-height:42px}
  .field input,.field select,.input{min-height:44px}
  .field input,.field textarea,.field select,.input{font-size:16px} /* stops iOS zooming into fields */
}