/* Hallmark · macrostructure: home = feature showcase, legal = long document · tone: calm, credible · anchor hue: gold #c9a24f */
/* Hallmark · pre-emit critique: P4 H4 E4 S4 R5 V3 */
/* SaenPost site styles. One file, no external requests, no JavaScript. */

/* ---------- fonts ---------- */
/* IBM Plex Sans Thai, self-hosted (SIL Open Font License 1.1, see fonts/OFL.txt).
   Files and unicode-range values come from @fontsource/ibm-plex-sans-thai 5.3.0:
   thai + latin subsets, weights 400, 500, 600 and 700. A browser downloads a file
   only when the page uses that weight with characters from that subset. */
@font-face {
  font-family: "IBM Plex Sans Thai";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/ibm-plex-sans-thai-thai-400-normal.woff2") format("woff2");
  unicode-range: U+02D7,U+0303,U+0331,U+0E01-0E5B,U+200C-200D,U+25CC;
}

@font-face {
  font-family: "IBM Plex Sans Thai";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/ibm-plex-sans-thai-latin-400-normal.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;
}

@font-face {
  font-family: "IBM Plex Sans Thai";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("fonts/ibm-plex-sans-thai-thai-500-normal.woff2") format("woff2");
  unicode-range: U+02D7,U+0303,U+0331,U+0E01-0E5B,U+200C-200D,U+25CC;
}

@font-face {
  font-family: "IBM Plex Sans Thai";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("fonts/ibm-plex-sans-thai-latin-500-normal.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;
}

@font-face {
  font-family: "IBM Plex Sans Thai";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("fonts/ibm-plex-sans-thai-thai-600-normal.woff2") format("woff2");
  unicode-range: U+02D7,U+0303,U+0331,U+0E01-0E5B,U+200C-200D,U+25CC;
}

@font-face {
  font-family: "IBM Plex Sans Thai";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("fonts/ibm-plex-sans-thai-latin-600-normal.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;
}

@font-face {
  font-family: "IBM Plex Sans Thai";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("fonts/ibm-plex-sans-thai-thai-700-normal.woff2") format("woff2");
  unicode-range: U+02D7,U+0303,U+0331,U+0E01-0E5B,U+200C-200D,U+25CC;
}

@font-face {
  font-family: "IBM Plex Sans Thai";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("fonts/ibm-plex-sans-thai-latin-700-normal.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;
}

/* ---------- tokens ---------- */
:root {
  /* colour: brand near-black, gold and cream (contrast checked against WCAG AA) */
  --color-ink: #1b1b1b;            /* text on light, dark bands */
  --color-paper: #f3efe6;          /* page background (ink on paper 15:1) */
  --color-paper-raised: #faf8f3;   /* cards, tables */
  --color-paper-sunk: #ebe4d3;     /* table header row */
  --color-gold: #c9a24f;           /* accent; ink on gold 7.2:1, gold on ink 7.2:1 */
  --color-gold-strong: #d6b263;    /* primary button hover */
  --color-bronze: #7a5a12;         /* links on paper 5.5:1 */
  --color-muted: #5c5548;          /* secondary text on paper 6.4:1 */
  --color-rule: #d8ccb0;           /* hairlines (decorative) */
  --color-on-ink: #f3efe6;         /* text on dark bands */
  --color-on-ink-muted: #bfb6a3;   /* secondary text on dark 8.6:1 */
  --color-ink-rule: #3d3a34;       /* hairlines on dark */
  --color-focus: #1b1b1b;
  --color-focus-on-ink: #c9a24f;
  --color-print-paper: #ffffff;
  --color-print-ink: #000000;

  /* type: self-hosted IBM Plex Sans Thai first, then system fonts that render Thai well */
  --font-sans: "IBM Plex Sans Thai", "Sukhumvit Set", "Leelawadee UI", "Noto Sans Thai", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --text-xs: 0.8125rem;
  --text-sm: 0.9375rem;
  --text-base: 1.0625rem;
  --text-lg: 1.1875rem;
  --text-xl: 1.375rem;
  --text-2xl: clamp(1.375rem, 1.2rem + 0.8vw, 1.75rem);
  --text-3xl: clamp(1.625rem, 1.3rem + 1.6vw, 2.25rem);
  --text-display: clamp(1.875rem, 1.25rem + 3vw, 3.125rem);
  --leading-body-th: 1.75;
  --leading-body-en: 1.6;
  --leading-tight: 1.35;

  /* space: 4 pt scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  --radius-sm: 6px;
  --radius-md: 14px;
  --radius-pill: 999px;
  --measure: 70ch;
  --wrap: 72rem;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --tap: 44px;                     /* touch target up to 768px wide */
  --tap-min: 24px;                 /* smallest target on wider screens (WCAG 2.5.8) */

  --dur-fast: 150ms;
  --ease-out: cubic-bezier(0.2, 0.7, 0.2, 1);
}

/* ---------- base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  overflow-x: clip;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  overflow-x: clip;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-body-th);
  font-synthesis: none;            /* real 400 to 700 faces exist and no italics are used */
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
}

:lang(en) {
  line-height: var(--leading-body-en);
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-style: normal;
  font-weight: 700;
  line-height: var(--leading-tight);
  overflow-wrap: anywhere;
  min-width: 0;
}

/* headings stay at 1.35 in English too (:lang(en) above is more specific than h1) */
:is(h1, h2, h3, h4):lang(en),
:is(h1, h2, h3, h4) :lang(en) {
  line-height: var(--leading-tight);
}

p {
  margin: 0;
}

img,
svg {
  max-width: 100%;
}

a {
  color: var(--color-bronze);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  overflow-wrap: anywhere;
  transition: color var(--dur-fast) var(--ease-out);
}

a:hover {
  color: var(--color-ink);
  text-decoration-thickness: 2px;
}

a:focus-visible,
.btn:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

/* round the ring on text links; buttons keep their pill shape while focused */
a:not(.btn):focus-visible {
  border-radius: var(--radius-sm);
}

::selection {
  background: var(--color-gold);
  color: var(--color-ink);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip {
  position: absolute;
  left: var(--space-4);
  top: -6rem;
  z-index: 10;
  min-height: var(--tap);
  padding: var(--space-2) var(--space-4);
  background: var(--color-ink);
  color: var(--color-on-ink);
  border-radius: var(--radius-sm);
}

.skip:focus {
  top: var(--space-4);
  color: var(--color-on-ink);
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- header ---------- */
.site-head {
  border-bottom: 1px solid var(--color-rule);
  background: var(--color-paper);
}

.site-head__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2) var(--space-6);
  padding-block: var(--space-3);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  min-height: var(--tap);
  color: var(--color-ink);
  font-size: var(--text-lg);
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.brand:hover {
  color: var(--color-ink);
}

.brand img {
  width: 32px;
  height: 32px;
  flex: none;
}

.site-nav,
.lang-switch {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 var(--space-5);
}

.site-nav a,
.lang-switch a {
  display: inline-flex;
  align-items: center;
  min-height: var(--tap);
  color: var(--color-ink);
  font-size: var(--text-sm);
  text-decoration: none;
  white-space: nowrap;
}

.site-nav a:hover,
.lang-switch a:hover {
  text-decoration: underline;
}

.site-nav a.site-nav__section {
  display: none;
}

.lang-switch {
  gap: 0 var(--space-3);
  font-weight: 700;
}

.lang-switch span {
  color: var(--color-muted);
}

@media (min-width: 52rem) {
  .site-nav a.site-nav__section {
    display: inline-flex;
  }
}

/* ---------- buttons ---------- */
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 var(--space-6);
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: var(--text-base);
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background: var(--color-gold);
  color: var(--color-ink);
}

.btn--primary:hover {
  background: var(--color-gold-strong);
  color: var(--color-ink);
}

.btn--quiet {
  border-color: var(--color-on-ink-muted);
  color: var(--color-on-ink);
}

.btn--quiet:hover {
  border-color: var(--color-on-ink);
  color: var(--color-on-ink);
}

/* ---------- hero (dark band) ---------- */
.hero {
  background: var(--color-ink);
  color: var(--color-on-ink);
}

.hero a:focus-visible,
.hero .btn:focus-visible,
.site-foot a:focus-visible {
  outline-color: var(--color-focus-on-ink);
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-10);
  align-items: center;
  padding-block: clamp(3rem, 8vw, 6rem);
}

.hero h1 {
  font-size: var(--text-display);
  max-width: 22em;
}

.hero__lede {
  max-width: 38em;
  margin-top: var(--space-5);
  color: var(--color-on-ink-muted);
  font-size: var(--text-lg);
}

.hero__note {
  margin-top: var(--space-6);
  color: var(--color-on-ink-muted);
  font-size: var(--text-sm);
}

.hero__art {
  margin: 0;
}

.hero__art svg {
  display: block;
  width: 100%;
  max-width: 26rem;
  height: auto;
  margin-inline: auto;
}

.art-line {
  stroke: var(--color-on-ink-muted);
  stroke-width: 4;
  stroke-linecap: round;
  fill: none;
}

.art-dot {
  fill: var(--color-on-ink);
}

.art-source {
  fill: var(--color-gold);
}

.art-label {
  fill: var(--color-on-ink);
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 600;
}

.art-caption {
  fill: var(--color-on-ink-muted);
  font-family: var(--font-sans);
  font-size: 15px;
}

@media (min-width: 60rem) {
  .hero__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
  }
}

/* ---------- homepage sections ---------- */
.section {
  padding-block: clamp(3rem, 7vw, 5.5rem);
}

.section + .section {
  border-top: 1px solid var(--color-rule);
}

.section__head {
  max-width: 46rem;
  margin-bottom: var(--space-8);
}

.section__head h2 {
  font-size: var(--text-3xl);
}

.section__head p {
  margin-top: var(--space-3);
  color: var(--color-muted);
}

.cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  margin: 0;
  padding: 0;
  list-style: none;
}

.card {
  padding: var(--space-6);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-md);
  background: var(--color-paper-raised);
}

.card h3 {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xl);
}

.card h3::before {
  content: "";
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-gold);
}

.card p {
  margin-top: var(--space-3);
  color: var(--color-muted);
}

@media (min-width: 40rem) {
  .cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 66rem) {
  .cards {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-8);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.steps li {
  position: relative;
  padding-left: 3.25rem;
  counter-increment: step;
}

.steps li::before {
  content: counter(step);
  position: absolute;
  top: 0;
  left: 0;
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  background: var(--color-ink);
  color: var(--color-gold);
  font-weight: 700;
  line-height: 1;
}

.steps h3 {
  font-size: var(--text-xl);
}

.steps p {
  margin-top: var(--space-2);
}

@media (min-width: 48rem) {
  .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-10) var(--space-12);
  }
}

.features {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-8) var(--space-12);
}

.feature h3 {
  padding-top: var(--space-4);
  border-top: 2px solid var(--color-gold);
  font-size: var(--text-lg);
}

.feature p {
  margin-top: var(--space-2);
  color: var(--color-muted);
}

@media (min-width: 48rem) {
  .features {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 66rem) {
  .features {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.lead {
  max-width: 40em;
  font-size: var(--text-xl);
}

.panel {
  max-width: 50rem;
  padding: var(--space-8) var(--space-6);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-md);
  background: var(--color-paper-raised);
}

.panel ul {
  margin: var(--space-4) 0 0;
  padding-left: 1.25em;
}

.panel li + li {
  margin-top: var(--space-3);
}

.panel p + p,
.panel ul + p {
  margin-top: var(--space-5);
}

.price {
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: var(--leading-tight);
}

.price-note {
  max-width: 40em;
  margin-top: var(--space-3);
  color: var(--color-muted);
}

.faq {
  display: grid;
  gap: var(--space-8);
  max-width: 46rem;
}

.faq h3 {
  font-size: var(--text-lg);
}

.faq p {
  margin-top: var(--space-2);
}

/* ---------- legal documents ---------- */
.doc-head {
  border-bottom: 1px solid var(--color-rule);
  padding-block: clamp(2.5rem, 6vw, 4rem) var(--space-8);
}

.doc-head__inner {
  max-width: var(--measure);
  margin-inline: auto;
}

.doc-head h1 {
  font-size: var(--text-display);
}

.doc-head__en {
  display: block;
  margin-top: var(--space-2);
  color: var(--color-muted);
  font-size: var(--text-2xl);
  font-weight: 600;
}

.doc-head__meta {
  margin-top: var(--space-4);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.prevail {
  margin-top: var(--space-5);
  padding: var(--space-4) var(--space-5);
  border-left: 4px solid var(--color-gold);
  border-radius: var(--radius-sm);
  background: var(--color-paper-raised);
  font-size: var(--text-sm);
}

.prevail span {
  display: block;
  margin-top: var(--space-1);
}

.doc {
  max-width: var(--measure);
  margin-inline: auto;
  padding-block: var(--space-12);
}

.doc--en {
  border-top: 3px double var(--color-rule);
}

.doc [id] {
  scroll-margin-top: var(--space-6);
}

.doc h2 {
  font-size: var(--text-3xl);
}

.doc h3 {
  margin-top: var(--space-12);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-rule);
  font-size: var(--text-xl);
}

.doc h4 {
  margin-top: var(--space-8);
  font-size: var(--text-lg);
}

.doc p,
.doc ul,
.doc ol {
  margin-top: var(--space-4);
}

.doc ul,
.doc ol {
  margin-bottom: 0;
  padding-left: 1.4em;
}

.doc li + li {
  margin-top: var(--space-2);
}

.doc .meta {
  margin-top: var(--space-1);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.clause__no {
  font-weight: 700;
}

.doc code {
  padding: 0.05em 0.35em;
  border-radius: 4px;
  background: var(--color-paper-sunk);
  font-family: var(--font-mono);
  font-size: 0.88em;
  overflow-wrap: anywhere;
}

/* tables: stacked cards on small screens, real tables from 40rem */
.table-wrap {
  margin-top: var(--space-6);
}

.doc table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.doc table,
.doc thead,
.doc tbody,
.doc tr,
.doc th,
.doc td {
  display: block;
}

.doc thead {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.doc tbody tr {
  margin-top: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  background: var(--color-paper-raised);
}

.doc td {
  padding: var(--space-1) 0;
  overflow-wrap: anywhere;
}

.doc td::before {
  content: attr(data-label);
  display: block;
  color: var(--color-muted);
  font-size: var(--text-xs);
  font-weight: 700;
}

@media (min-width: 40rem) {
  .doc table {
    display: table;
    border: 1px solid var(--color-rule);
    background: var(--color-paper-raised);
  }

  .doc thead {
    position: static;
    display: table-header-group;
    width: auto;
    height: auto;
    overflow: visible;
    clip: auto;
    clip-path: none;
    white-space: normal;
  }

  .doc tbody {
    display: table-row-group;
  }

  .doc tr,
  .doc tbody tr {
    display: table-row;
    margin: 0;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: none;
  }

  .doc th,
  .doc td {
    display: table-cell;
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-rule);
    text-align: left;
    vertical-align: top;
  }

  .doc thead th {
    background: var(--color-paper-sunk);
  }

  .doc td::before {
    content: none;
  }
}

/* ---------- footer ---------- */
.site-foot {
  padding-block: var(--space-12) var(--space-10);
  background: var(--color-ink);
  color: var(--color-on-ink);
  font-size: var(--text-sm);
}

.site-foot p {
  margin-top: var(--space-2);
  color: var(--color-on-ink-muted);
}

.site-foot a {
  color: var(--color-gold);
}

.site-foot a:hover {
  color: var(--color-on-ink);
}

/* contact email: a full tap target on touch screens, not just a line of text */
.site-foot p a {
  display: inline-flex;
  align-items: center;
  min-height: var(--tap);
}

@media (min-width: 48.0625rem) {
  .site-foot p a {
    min-height: var(--tap-min);
  }
}

.site-foot__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-8);
}

.site-foot__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-foot .site-foot__brand {
  margin-top: 0;
  color: var(--color-on-ink);
  font-size: var(--text-lg);
  font-weight: 700;
}

.site-foot__brand img {
  width: 28px;
  height: 28px;
  flex: none;
}

.site-foot__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0 var(--space-6);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-foot__links + .site-foot__links {
  margin-top: var(--space-2);
}

.site-foot__links a {
  display: inline-flex;
  align-items: center;
  min-height: var(--tap);
  white-space: nowrap;
}

.site-foot .site-foot__fine {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-ink-rule);
}

.site-foot__fine + p {
  margin-top: var(--space-2);
}

@media (min-width: 48rem) {
  .site-foot__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  }
}

/* ---------- motion and print ---------- */
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}

@media print {
  .site-head nav,
  .skip,
  .hero__art {
    display: none;
  }

  body,
  .hero,
  .site-foot {
    background: var(--color-print-paper);
    color: var(--color-print-ink);
  }
}