/* =====================================================================
   PEXTH UI — shared design system (source of truth: _shared/ui)
   Thailand's Trusted Energy Platform · CONNECT · VERIFY · POWER · GROW
   Copied into each app by tools/sync-shared. Light + dark themes.
   ===================================================================== */

/* ---------- tokens: light (default) ---------- */
:root {
  --font-sans: "IBM Plex Sans Thai", "Inter", "Noto Sans Thai", system-ui, -apple-system,
               "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  /* brand */
  --brand-900: #061f4a;
  --brand-800: #0a2c66;
  --brand-700: #0b3d91;   /* primary — trust / verification */
  --brand-600: #1552b8;
  --brand-500: #2a6ad6;
  --brand-100: #dbe7fb;
  --brand-50:  #eef4fd;

  --solar-600: #d98a00;
  --solar-500: #f5a623;   /* accent — solar / energy */
  --solar-400: #ffbf47;
  --solar-100: #fff1d6;

  --grow-600:  #15803d;
  --grow-500:  #16a34a;   /* growth / sustainability */
  --grow-100:  #dcfce7;

  /* partner tiers (deck) */
  --tier-gold:        #c9a227;
  --tier-gold-bg:     #fbf3d6;
  --tier-silver:      #8a96a3;
  --tier-silver-bg:   #eef1f4;
  --tier-bronze:      #b0643a;   /* "Copper Verified" */
  --tier-bronze-bg:   #f8e9df;

  /* semantic surface */
  --bg:          #f6f8fb;
  --surface:     #ffffff;
  --surface-2:   #f1f4f9;
  --surface-3:   #e8edf5;
  --border:      #dde3ec;
  --border-strong:#c3ccda;
  --text:        #0f1b2d;
  --text-2:      #45546b;
  --text-3:      #6b7a90;
  --text-inv:    #ffffff;

  --primary:     var(--brand-700);
  --primary-hover: var(--brand-800);
  --primary-soft:var(--brand-50);
  --accent:      var(--solar-500);
  --accent-ink:  #3a2600;
  --success:     var(--grow-500);
  --success-soft:var(--grow-100);
  --warning:     #b45309;
  --warning-soft:#fef3c7;
  --danger:      #c62828;
  --danger-soft: #fde8e8;
  --info:        var(--brand-500);
  --info-soft:   var(--brand-50);

  --focus: 0 0 0 3px rgba(42, 106, 214, .35);

  /* shape / depth */
  --r-xs: 4px; --r-sm: 6px; --r: 10px; --r-lg: 14px; --r-xl: 20px; --r-pill: 999px;
  --shadow-1: 0 1px 2px rgba(15, 27, 45, .06), 0 1px 3px rgba(15, 27, 45, .08);
  --shadow-2: 0 4px 12px rgba(15, 27, 45, .08), 0 2px 4px rgba(15, 27, 45, .05);
  --shadow-3: 0 12px 32px rgba(15, 27, 45, .14);

  /* spacing scale */
  --s-1: 4px; --s-2: 8px; --s-3: 12px; --s-4: 16px; --s-5: 20px;
  --s-6: 24px; --s-8: 32px; --s-10: 40px; --s-12: 48px; --s-16: 64px;

  --container: 1200px;
  --gutter: 16px;
  --nav-h: 64px;
  --ease: cubic-bezier(.2, .7, .2, 1);

  color-scheme: light;
}

/* ---------- tokens: dark ---------- */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:          #0a1220;
    --surface:     #111b2c;
    --surface-2:   #16223a;
    --surface-3:   #1d2b47;
    --border:      #243453;
    --border-strong:#33466b;
    --text:        #e7edf7;
    --text-2:      #a9b7cd;
    --text-3:      #7f8ea8;
    --primary:     #5b8def;
    --primary-hover:#7aa4f3;
    --primary-soft:#16264a;
    --info-soft:   #16264a;
    --success-soft:#0f2e1c;
    --warning-soft:#33240a;
    --danger-soft: #3a1414;
    --tier-gold-bg:#3a3010;
    --tier-silver-bg:#262d37;
    --tier-bronze-bg:#3a2415;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg:          #0a1220;
  --surface:     #111b2c;
  --surface-2:   #16223a;
  --surface-3:   #1d2b47;
  --border:      #243453;
  --border-strong:#33466b;
  --text:        #e7edf7;
  --text-2:      #a9b7cd;
  --text-3:      #7f8ea8;
  --primary:     #5b8def;
  --primary-hover:#7aa4f3;
  --primary-soft:#16264a;
  --info-soft:   #16264a;
  --success-soft:#0f2e1c;
  --warning-soft:#33240a;
  --danger-soft: #3a1414;
  --tier-gold-bg:#3a3010;
  --tier-silver-bg:#262d37;
  --tier-bronze-bg:#3a2415;
  color-scheme: dark;
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, video, svg { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 var(--s-3); font-weight: 700; letter-spacing: -.01em; }
h1 { font-size: clamp(1.9rem, 4vw, 2.9rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: 1.25rem; }
p  { margin: 0 0 var(--s-4); }
:focus-visible { outline: none; box-shadow: var(--focus); border-radius: var(--r-sm); }
::selection { background: var(--solar-400); color: var(--accent-ink); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
[hidden] { display: none !important; }

/* ---------- layout ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }
.stack > * + * { margin-top: var(--s-4); }
.row { display: flex; gap: var(--s-4); align-items: center; flex-wrap: wrap; }
.row-between { display: flex; gap: var(--s-4); align-items: center; justify-content: space-between; flex-wrap: wrap; }
.grid { display: grid; gap: var(--s-6); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-auto { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.section { padding: var(--s-16) 0; }
.section-sm { padding: var(--s-10) 0; }
.muted { color: var(--text-2); }
.subtle { color: var(--text-3); font-size: .9rem; }
.center { text-align: center; }
.mt-0 { margin-top: 0; } .mb-0 { margin-bottom: 0; }
.w-full { width: 100%; }
@media (max-width: 900px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } .section { padding: var(--s-10) 0; } }

/* ---------- eyebrow / tagline ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font-size: .78rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--primary);
}
.tagline { display: flex; gap: var(--s-3); flex-wrap: wrap; font-weight: 800; letter-spacing: .14em; font-size: .85rem; }
.tagline span { color: var(--primary); }
.tagline span:nth-child(2) { color: var(--grow-500); }
.tagline span:nth-child(3) { color: var(--solar-600); }
.tagline span:nth-child(4) { color: var(--brand-500); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--s-2);
  min-height: 42px; padding: 0 var(--s-5);
  font: inherit; font-weight: 600; font-size: .95rem; line-height: 1;
  border: 1px solid transparent; border-radius: var(--r);
  cursor: pointer; text-decoration: none; white-space: nowrap;
  transition: background .15s var(--ease), border-color .15s var(--ease), transform .06s var(--ease), box-shadow .15s var(--ease);
  user-select: none;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn:disabled, .btn[aria-disabled="true"] { opacity: .55; cursor: not-allowed; transform: none; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-accent { background: var(--accent); color: var(--accent-ink); }
.btn-accent:hover { background: var(--solar-400); }
.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-outline { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn-outline:hover { background: var(--surface-2); }
.btn-ghost { background: transparent; color: var(--text-2); }
.btn-ghost:hover { background: var(--surface-2); color: var(--text); }
.btn-sm { min-height: 34px; padding: 0 var(--s-3); font-size: .85rem; border-radius: var(--r-sm); }
.btn-lg { min-height: 52px; padding: 0 var(--s-8); font-size: 1.05rem; }
.btn-block { width: 100%; }
.btn .spin { width: 16px; height: 16px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: pexth-spin .7s linear infinite; }
@keyframes pexth-spin { to { transform: rotate(360deg); } }

/* social sign-in buttons */
.btn-social { background: var(--surface); color: var(--text); border-color: var(--border-strong); justify-content: flex-start; padding-left: var(--s-4); }
.btn-social:hover { background: var(--surface-2); }
.btn-social .ico { width: 20px; height: 20px; flex: none; }
.btn-line { background: #06c755; color: #fff; border-color: #06c755; }
.btn-line:hover { background: #05b34c; }
.btn-facebook { background: #1877f2; color: #fff; border-color: #1877f2; }
.btn-facebook:hover { background: #0f65d6; }

/* ---------- cards ---------- */
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg);
  box-shadow: var(--shadow-1); overflow: hidden;
}
.card-body { padding: var(--s-6); }
.card-hover { transition: transform .18s var(--ease), box-shadow .18s var(--ease), border-color .18s var(--ease); }
.card-hover:hover { transform: translateY(-3px); box-shadow: var(--shadow-2); border-color: var(--border-strong); }
.card-title { font-size: 1.1rem; font-weight: 700; margin: 0 0 var(--s-2); }

/* ---------- badges / tiers ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 10px; border-radius: var(--r-pill);
  font-size: .75rem; font-weight: 700; line-height: 1.5; white-space: nowrap;
  background: var(--surface-3); color: var(--text-2);
}
.badge-primary { background: var(--primary-soft); color: var(--primary); }
.badge-success { background: var(--success-soft); color: var(--grow-600); }
.badge-warning { background: var(--warning-soft); color: var(--warning); }
.badge-danger  { background: var(--danger-soft); color: var(--danger); }
.badge-verified { background: var(--success-soft); color: var(--grow-600); }
.tier { display: inline-flex; align-items: center; gap: 6px; padding: 4px 11px; border-radius: var(--r-pill); font-size: .74rem; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; }
.tier::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: currentColor; }
.tier-gold   { background: var(--tier-gold-bg);   color: var(--tier-gold); }
.tier-silver { background: var(--tier-silver-bg); color: var(--tier-silver); }
.tier-bronze { background: var(--tier-bronze-bg); color: var(--tier-bronze); }
.tier-none   { background: var(--surface-3); color: var(--text-3); }

/* ---------- forms ---------- */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: var(--s-4); }
.label { font-size: .88rem; font-weight: 600; color: var(--text); }
.label .req { color: var(--danger); margin-left: 2px; }
.input, .select, .textarea {
  width: 100%; min-height: 44px; padding: 10px 14px;
  font: inherit; font-size: .95rem; color: var(--text);
  background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--r);
  transition: border-color .15s var(--ease), box-shadow .15s var(--ease);
}
.textarea { min-height: 110px; resize: vertical; line-height: 1.5; }
.select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--text-3) 50%), linear-gradient(135deg, var(--text-3) 50%, transparent 50%); background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 36px; }
.input:focus, .select:focus, .textarea:focus { outline: none; border-color: var(--primary); box-shadow: var(--focus); }
.input::placeholder, .textarea::placeholder { color: var(--text-3); }
.field.has-error .input, .field.has-error .select, .field.has-error .textarea { border-color: var(--danger); }
.field-error { font-size: .8rem; color: var(--danger); }
.hint { font-size: .8rem; color: var(--text-3); }
.checkbox { display: flex; gap: var(--s-2); align-items: flex-start; font-size: .9rem; cursor: pointer; }
.checkbox input { width: 18px; height: 18px; margin-top: 3px; accent-color: var(--primary); flex: none; }
.input-group { position: relative; }
.input-group .input { padding-right: 46px; }
.input-group .toggle { position: absolute; right: 6px; top: 50%; transform: translateY(-50%); }
.divider { display: flex; align-items: center; gap: var(--s-3); color: var(--text-3); font-size: .85rem; margin: var(--s-5) 0; }
.divider::before, .divider::after { content: ""; flex: 1; height: 1px; background: var(--border); }

/* ---------- alerts / toast ---------- */
.alert { display: flex; gap: var(--s-3); padding: var(--s-3) var(--s-4); border-radius: var(--r); font-size: .92rem; border: 1px solid transparent; }
.alert-info    { background: var(--info-soft);    color: var(--info);     border-color: var(--brand-100); }
.alert-success { background: var(--success-soft); color: var(--grow-600); }
.alert-warning { background: var(--warning-soft); color: var(--warning); }
.alert-danger  { background: var(--danger-soft);  color: var(--danger); }
.toast-wrap { position: fixed; z-index: 1000; right: var(--s-4); bottom: var(--s-4); display: flex; flex-direction: column; gap: var(--s-2); max-width: min(380px, calc(100vw - 32px)); }
.toast { background: var(--text); color: var(--bg); padding: var(--s-3) var(--s-4); border-radius: var(--r); box-shadow: var(--shadow-3); font-size: .92rem; animation: pexth-toast .25s var(--ease); }
.toast.ok { background: var(--grow-600); color: #fff; }
.toast.err { background: var(--danger); color: #fff; }
@keyframes pexth-toast { from { opacity: 0; transform: translateY(8px); } }

/* ---------- navbar ---------- */
.nav { position: sticky; top: 0; z-index: 100; height: var(--nav-h); background: color-mix(in srgb, var(--surface) 88%, transparent); backdrop-filter: saturate(160%) blur(10px); border-bottom: 1px solid var(--border); }
.nav .container { height: 100%; display: flex; align-items: center; gap: var(--s-6); }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.25rem; letter-spacing: .02em; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand-mark { width: 34px; height: 34px; flex: none; }
.brand small { display: block; font-size: .62rem; font-weight: 600; letter-spacing: .08em; color: var(--text-3); text-transform: uppercase; }
.nav-links { display: flex; gap: var(--s-1); align-items: center; }
.nav-links a { color: var(--text-2); font-weight: 600; font-size: .93rem; padding: 8px 12px; border-radius: var(--r-sm); }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text); background: var(--surface-2); text-decoration: none; }
.nav-spacer { flex: 1; }
.nav-actions { display: flex; gap: var(--s-2); align-items: center; }
.nav-toggle { display: none; }
@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-links.open { display: flex; position: absolute; top: var(--nav-h); left: 0; right: 0; flex-direction: column; align-items: stretch; background: var(--surface); border-bottom: 1px solid var(--border); padding: var(--s-3) var(--gutter); box-shadow: var(--shadow-2); }
  .nav-toggle { display: inline-flex; }
}

/* ---------- avatar / user menu ---------- */
.avatar { width: 36px; height: 36px; border-radius: 50%; background: var(--primary-soft); color: var(--primary); display: inline-flex; align-items: center; justify-content: center; font-weight: 700; font-size: .9rem; overflow: hidden; flex: none; }
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.menu { position: relative; }
.menu-panel { position: absolute; right: 0; top: calc(100% + 8px); min-width: 220px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); box-shadow: var(--shadow-3); padding: var(--s-2); z-index: 200; }
.menu-panel a, .menu-panel button { display: flex; width: 100%; align-items: center; gap: var(--s-2); padding: 9px 12px; border-radius: var(--r-sm); color: var(--text); font: inherit; font-size: .92rem; background: none; border: 0; cursor: pointer; text-align: left; }
.menu-panel a:hover, .menu-panel button:hover { background: var(--surface-2); text-decoration: none; }
.menu-sep { height: 1px; background: var(--border); margin: var(--s-2) 0; }

/* ---------- tables ---------- */
.table-wrap { width: 100%; overflow-x: auto; border: 1px solid var(--border); border-radius: var(--r-lg); background: var(--surface); }
.table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.table th, .table td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
.table th { font-size: .76rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--text-3); background: var(--surface-2); }
.table tr:last-child td { border-bottom: 0; }
.table tbody tr:hover { background: var(--surface-2); }
.num { text-align: right; font-variant-numeric: tabular-nums; }

/* ---------- tabs / pagination ---------- */
.tabs { display: flex; gap: var(--s-1); border-bottom: 1px solid var(--border); overflow-x: auto; }
.tab { padding: 10px 16px; font: inherit; font-weight: 600; font-size: .92rem; color: var(--text-2); background: none; border: 0; border-bottom: 2px solid transparent; cursor: pointer; white-space: nowrap; }
.tab:hover { color: var(--text); }
.tab[aria-selected="true"] { color: var(--primary); border-bottom-color: var(--primary); }
.pager { display: flex; gap: var(--s-1); justify-content: center; align-items: center; margin-top: var(--s-6); flex-wrap: wrap; }
.pager button { min-width: 38px; height: 38px; border: 1px solid var(--border); background: var(--surface); color: var(--text); border-radius: var(--r-sm); font: inherit; cursor: pointer; }
.pager button[aria-current="page"] { background: var(--primary); color: #fff; border-color: var(--primary); }
.pager button:disabled { opacity: .45; cursor: not-allowed; }

/* ---------- stat tiles ---------- */
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg); padding: var(--s-5); }
.stat-label { font-size: .8rem; font-weight: 600; color: var(--text-3); text-transform: uppercase; letter-spacing: .06em; }
.stat-value { font-size: 1.9rem; font-weight: 800; line-height: 1.1; margin-top: var(--s-2); font-variant-numeric: tabular-nums; }
.stat-delta { font-size: .82rem; font-weight: 600; margin-top: var(--s-1); }
.stat-delta.up { color: var(--grow-600); } .stat-delta.down { color: var(--danger); }

/* ---------- modal ---------- */
.modal-backdrop { position: fixed; inset: 0; z-index: 900; background: rgba(6, 15, 30, .55); display: flex; align-items: center; justify-content: center; padding: var(--s-4); animation: pexth-fade .15s var(--ease); }
.modal { width: 100%; max-width: 520px; max-height: calc(100vh - 32px); overflow-y: auto; background: var(--surface); border-radius: var(--r-xl); box-shadow: var(--shadow-3); }
.modal-head { display: flex; align-items: center; justify-content: space-between; padding: var(--s-5) var(--s-6); border-bottom: 1px solid var(--border); }
.modal-body { padding: var(--s-6); }
.modal-foot { display: flex; gap: var(--s-2); justify-content: flex-end; padding: var(--s-4) var(--s-6); border-top: 1px solid var(--border); background: var(--surface-2); }
@keyframes pexth-fade { from { opacity: 0; } }

/* ---------- skeleton / empty ---------- */
.skeleton { background: linear-gradient(90deg, var(--surface-2) 25%, var(--surface-3) 37%, var(--surface-2) 63%); background-size: 400% 100%; animation: pexth-shimmer 1.3s ease infinite; border-radius: var(--r-sm); }
@keyframes pexth-shimmer { 0% { background-position: 100% 50%; } 100% { background-position: 0 50%; } }
.empty { text-align: center; padding: var(--s-12) var(--s-4); color: var(--text-3); }
.empty-ico { width: 56px; height: 56px; margin: 0 auto var(--s-3); opacity: .5; }

/* ---------- auth shell (account) ---------- */
.auth-shell { min-height: 100vh; display: grid; grid-template-columns: 1fr 1fr; }
.auth-aside { position: relative; overflow: hidden; background: linear-gradient(155deg, var(--brand-900), var(--brand-700) 60%, var(--brand-600)); color: #fff; padding: var(--s-12); display: flex; flex-direction: column; justify-content: space-between; }
.auth-aside::after { content: ""; position: absolute; width: 520px; height: 520px; right: -160px; bottom: -180px; border-radius: 50%; background: radial-gradient(circle, rgba(245, 166, 35, .55), rgba(245, 166, 35, 0) 70%); }
.auth-main { display: flex; align-items: center; justify-content: center; padding: var(--s-8) var(--gutter); }
.auth-card { width: 100%; max-width: 420px; }
@media (max-width: 900px) { .auth-shell { grid-template-columns: 1fr; } .auth-aside { display: none; } }

/* ---------- app shell (partner / business consoles) ---------- */
.app-shell { display: grid; grid-template-columns: 260px 1fr; min-height: 100vh; }
.sidebar { position: sticky; top: 0; height: 100vh; overflow-y: auto; background: var(--surface); border-right: 1px solid var(--border); padding: var(--s-5) var(--s-3); display: flex; flex-direction: column; gap: var(--s-1); }
.sidebar .brand { padding: 0 var(--s-3) var(--s-5); }
.side-link { display: flex; align-items: center; gap: var(--s-3); padding: 10px 12px; border-radius: var(--r-sm); color: var(--text-2); font-weight: 600; font-size: .92rem; }
.side-link:hover { background: var(--surface-2); color: var(--text); text-decoration: none; }
.side-link[aria-current="page"] { background: var(--primary-soft); color: var(--primary); }
.side-link .ico { width: 18px; height: 18px; flex: none; }
.side-group { font-size: .7rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; color: var(--text-3); padding: var(--s-4) 12px var(--s-1); }
.app-main { min-width: 0; }
.app-top { position: sticky; top: 0; z-index: 50; height: var(--nav-h); display: flex; align-items: center; gap: var(--s-4); padding: 0 var(--s-6); background: color-mix(in srgb, var(--surface) 90%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.app-content { padding: var(--s-6); max-width: 1280px; }
.page-head { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--s-4); flex-wrap: wrap; margin-bottom: var(--s-6); }
.page-head h1 { font-size: 1.6rem; margin: 0; }
@media (max-width: 960px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { position: fixed; z-index: 300; left: 0; top: 0; width: 270px; transform: translateX(-100%); transition: transform .22s var(--ease); box-shadow: var(--shadow-3); }
  .sidebar.open { transform: none; }
  .app-content { padding: var(--s-4); }
}

/* ---------- footer ---------- */
.footer { background: var(--brand-900); color: #c9d6ee; padding: var(--s-12) 0 var(--s-6); margin-top: var(--s-16); }
.footer a { color: #e7eefb; }
.footer h4 { color: #fff; font-size: .95rem; margin-bottom: var(--s-3); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.3fr; gap: var(--s-8); }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .12); margin-top: var(--s-10); padding-top: var(--s-5); font-size: .85rem; display: flex; justify-content: space-between; gap: var(--s-4); flex-wrap: wrap; }
@media (max-width: 860px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }

/* ---------- motion preference ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}

/* ---------- i18n: per-language typography ----------
   <html lang> is set by the server (th / en / zh-Hans / ja / ko). Han unification means the SAME
   code point renders differently per language, so the CJK font matching the page language must
   come FIRST in its stack; the others follow as fallbacks for mixed content (company names etc.). */
:root:lang(en) { --font-sans: "Inter", "IBM Plex Sans Thai", "Noto Sans Thai", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif; }
:root:lang(zh) { --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Inter", "IBM Plex Sans Thai", system-ui, sans-serif; }
:root:lang(ja) { --font-sans: "Noto Sans JP", "Hiragino Sans", "Yu Gothic UI", "Meiryo", "Inter", "IBM Plex Sans Thai", system-ui, sans-serif; }
:root:lang(ko) { --font-sans: "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", "Inter", "IBM Plex Sans Thai", system-ui, sans-serif; }
/* CJK: no negative tracking on headings, slightly taller lines, keep words (CJK+Latin mixes) from ugly breaks */
:root:lang(zh) body, :root:lang(ja) body, :root:lang(ko) body { line-height: 1.75; }
:root:lang(zh) h1, :root:lang(zh) h2, :root:lang(zh) h3,
:root:lang(ja) h1, :root:lang(ja) h2, :root:lang(ja) h3,
:root:lang(ko) h1, :root:lang(ko) h2, :root:lang(ko) h3 { letter-spacing: 0; line-height: 1.35; }
:root:lang(ko) { word-break: keep-all; overflow-wrap: anywhere; }
:root:lang(ja), :root:lang(zh) { overflow-wrap: anywhere; }
/* uppercase tracking only makes sense for Latin */
:root:lang(zh) .eyebrow, :root:lang(ja) .eyebrow, :root:lang(ko) .eyebrow,
:root:lang(zh) .table th, :root:lang(ja) .table th, :root:lang(ko) .table th,
:root:lang(zh) .stat-label, :root:lang(ja) .stat-label, :root:lang(ko) .stat-label,
:root:lang(zh) .side-group, :root:lang(ja) .side-group, :root:lang(ko) .side-group { letter-spacing: 0; text-transform: none; }

/* ---------- preferences control (language select + single theme icon) ---------- */
.prefs { display: inline-flex; align-items: center; gap: var(--s-2); }
.prefs-select { min-height: 34px; padding: 4px 30px 4px 10px; font-size: .85rem; font-weight: 600; width: auto; border-radius: var(--r-sm); background-color: var(--surface); }
.prefs-theme { position: relative; display: inline-grid; place-items: center; flex: none; width: 40px; height: 40px; padding: 0; border: 1px solid var(--border-strong); border-radius: 50%; color: var(--text-2); background: var(--surface); font: inherit; cursor: pointer; touch-action: manipulation; user-select: none; -webkit-touch-callout: none; }
.prefs-theme:hover { color: var(--primary); border-color: var(--primary); }
.prefs-theme:focus-within { box-shadow: var(--focus); }
.prefs-theme > svg { width: 20px; height: 20px; pointer-events: none; }
.prefs-theme-menu { position: fixed; z-index: 2000; min-width: 180px; max-width: calc(100vw - 16px); padding: 6px; border: 1px solid var(--border-strong); border-radius: var(--r); background: var(--surface); color: var(--text); box-shadow: var(--shadow-3); }
.prefs-theme-menu[hidden] { display: none; }
.prefs-theme-menu > button { display: flex; align-items: center; gap: 10px; width: 100%; min-height: 44px; padding: 8px 10px; border: 0; border-radius: var(--r-sm); background: transparent; color: inherit; font: inherit; font-size: .9rem; text-align: start; cursor: pointer; }
.prefs-theme-menu > button:hover,.prefs-theme-menu > button:focus-visible { background: var(--surface-2); outline: 2px solid var(--primary); outline-offset: -2px; }
.prefs-theme-menu > button[aria-checked="true"] { background: var(--primary-soft); color: var(--primary); }
.prefs-theme-menu svg { width: 18px; height: 18px; flex: none; }
.prefs-theme-check { margin-inline-start: auto; visibility: hidden; }
.prefs-theme-menu > button[aria-checked="true"] .prefs-theme-check { visibility: visible; }
.seg { display: inline-flex; padding: 3px; gap: 2px; border: 1px solid var(--border-strong); border-radius: var(--r-pill); background: var(--surface); }
.seg-btn { display: inline-flex; align-items: center; gap: 6px; min-height: 26px; padding: 0 10px; border: 0; border-radius: var(--r-pill); background: transparent; color: var(--text-2); font: inherit; font-size: .8rem; font-weight: 600; cursor: pointer; line-height: 1; }
.seg-btn:hover { color: var(--text); background: var(--surface-2); }
.seg-btn.is-on, .seg-btn[aria-checked="true"] { background: var(--primary); color: var(--on-primary, #fff); }   /* --on-primary: pexth-brand.css */
.seg-btn:focus-visible { box-shadow: var(--focus); }
@media (max-width: 520px) { .seg-label { display: none; } .prefs-select { max-width: 96px; } }
/* footer / dark surfaces */
.footer .prefs-select { background-color: rgba(255, 255, 255, .06); color: #e7eefb; border-color: rgba(255, 255, 255, .2); }
.footer .prefs-theme { background: rgba(255, 255, 255, .06); color: #d7e8ed; border-color: rgba(255, 255, 255, .2); }
.footer .seg { background: rgba(255, 255, 255, .06); border-color: rgba(255, 255, 255, .2); }
.footer .seg-btn { color: #c9d6ee; }

/* Session authority boundary keeps draft DOM but hides it from view, focus and pointer input. */
body.session-sealed > :not(.session-boundary) { visibility: hidden !important; pointer-events: none !important; }
.session-boundary { border: 0; padding: 0; background: transparent; color: var(--text); width: min(560px, calc(100vw - 32px)); max-height: calc(100dvh - 32px); }
.session-boundary[hidden] { display: none; }
.session-boundary::backdrop { background: var(--bg); }
.session-boundary-card { padding: clamp(24px, 5vw, 40px); box-shadow: var(--shadow-3); }
.session-boundary h1 { font-size: clamp(1.3rem, 3vw, 1.75rem); line-height: 1.45; }
.session-boundary .btn-row { flex-wrap: wrap; gap: 10px; }