:root {
  --color-bg-main: #FFF8F0;
  --color-bg-surface: #FFFFFF;
  --color-bg-calc: #FFEEDD;
  --color-text-main: #1F1B16;
  --color-text-muted: #6B5B4D;
  --color-border: #F0DFC9;
  --color-accent-orange: #FF7A1A;
  --color-accent-dark: #C75A00;
  --color-text-on-orange: #1F1B16;
  --color-shadow: rgba(31, 27, 22, 0.08);

  --font-display: "Mitr", sans-serif;
  --font-body: "Noto Sans Thai", sans-serif;

  --size-base: 16px;
  --lh-base: 1.6;

  --size-h1: 34px;
  --lh-h1: 1.2;
  --size-h2: 24px;
  --lh-h2: 1.3;
  --size-h3: 19px;
  --lh-h3: 1.35;

  --space-8: 8px;
  --space-16: 16px;
  --space-24: 24px;
  --space-32: 32px;
  --space-48: 48px;
  --space-64: 64px;

  --radius-main: 14px;
  --max-width-app: 560px;
  --max-width-prose: 640px;

  --dur-fast: 180ms;
  --ease-smooth: cubic-bezier(.22,.61,.36,1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  background-color: var(--color-bg-main);
  color: var(--color-text-main);
  font-family: var(--font-body);
  font-size: var(--size-base);
  line-height: var(--lh-base);
  overflow-x: clip;
}

body {
  max-width: var(--max-width-app);
  margin-inline: auto;
  min-height: 100vh;
  padding-bottom: var(--space-64);
  background-color: var(--color-bg-surface);
  box-shadow: 0 0 var(--space-32) var(--color-shadow);
}

h1 {
  font-family: var(--font-display);
  font-size: var(--size-h1);
  line-height: var(--lh-h1);
}

h2 {
  font-family: var(--font-display);
  font-size: var(--size-h2);
  line-height: var(--lh-h2);
}

h3 {
  font-family: var(--font-display);
  font-size: var(--size-h3);
  line-height: var(--lh-h3);
}

/* 1. z1-tabbar */
.z1-tabbar {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: var(--max-width-app);
  height: 64px;
  background-color: var(--color-bg-surface);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 300;
}

.z1-tabbar__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  flex: 1;
  height: 100%;
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 12px;
  position: relative;
  transition: transform var(--dur-fast) var(--ease-smooth), opacity var(--dur-fast) var(--ease-smooth);
}

.z1-tabbar__icon {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.z1-tabbar__item--active {
  color: var(--color-accent-orange);
  font-weight: 700;
}

.z1-tabbar__item--active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 3px;
  background-color: var(--color-accent-orange);
  border-radius: 2px;
}

/* 2. z1-hero */
.z1-hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  min-height: calc(100vh - 64px);
  padding: var(--space-48) var(--space-24);
  background-color: var(--color-bg-main);
  border-bottom: 1px solid var(--color-border);
  gap: var(--space-16);
}

.z1-hero__title {
  color: var(--color-text-main);
  font-family: var(--font-display);
  font-size: var(--size-h1);
  line-height: var(--lh-h1);
}

.z1-hero__subtitle {
  color: var(--color-text-muted);
  font-size: var(--size-base);
  line-height: var(--lh-base);
}

.z1-hero__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-16) var(--space-32);
  background-color: var(--color-accent-orange);
  color: var(--color-text-on-orange);
  font-family: var(--font-display);
  font-size: var(--size-base);
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-main);
  border: none;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-smooth), opacity var(--dur-fast) var(--ease-smooth);
}

.z1-hero__cta:hover {
  opacity: 0.92;
  transform: translateY(-2px);
}

/* 3. z1-promo-card */
.z1-promo-card {
  padding: var(--space-32) var(--space-24);
}

.z1-promo-card__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-16);
}

.z1-promo-card__item {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-main);
  padding: var(--space-24);
  box-shadow: 0 4px 12px var(--color-shadow);
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  transition: transform var(--dur-fast) var(--ease-smooth), opacity var(--dur-fast) var(--ease-smooth);
}

.z1-promo-card__title {
  font-size: var(--size-h3);
  line-height: var(--lh-h3);
  color: var(--color-text-main);
}

.z1-promo-card__desc {
  font-size: 14px;
  color: var(--color-text-muted);
}

/* 4. z1-cond-table */
.z1-cond-table {
  padding: var(--space-32) var(--space-24);
  overflow-x: auto;
}

.z1-cond-table__table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-main);
  overflow: hidden;
}

.z1-cond-table__table thead {
  background-color: var(--color-bg-main);
}

.z1-cond-table__table th {
  padding: var(--space-16);
  text-align: left;
  font-family: var(--font-display);
  font-size: var(--size-h3);
  color: var(--color-text-main);
  border-bottom: 1px solid var(--color-border);
}

.z1-cond-table__table td {
  padding: var(--space-16);
  color: var(--color-text-main);
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
}

.z1-cond-table__table tbody tr:last-child td {
  border-bottom: none;
}

/* 5. z1-calc */
.z1-calc {
  margin: var(--space-32) var(--space-24);
  padding: var(--space-24);
  background-color: var(--color-bg-calc);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-main);
  display: flex;
  flex-direction: column;
  gap: var(--space-16);
}

.z1-calc__title {
  font-size: var(--size-h2);
  line-height: var(--lh-h2);
  color: var(--color-text-main);
}

.z1-calc__field {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.z1-calc__input {
  padding: var(--space-16);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-main);
  background-color: var(--color-bg-surface);
  color: var(--color-text-main);
  font-size: var(--size-base);
}

.z1-calc__result {
  font-family: var(--font-display);
  font-size: var(--size-h3);
  color: var(--color-accent-dark);
  font-weight: 700;
}

/* 6. z1-prose */
.z1-prose {
  padding: var(--space-32) var(--space-24);
  max-width: var(--max-width-prose);
  margin-inline: auto;
}

.z1-prose p {
  margin-bottom: 20px;
  color: var(--color-text-main);
  font-size: var(--size-base);
  line-height: var(--lh-base);
}

.z1-prose p:last-child {
  margin-bottom: 0;
}

.z1-prose a {
  color: var(--color-accent-dark);
  text-decoration: underline;
  transition: transform var(--dur-fast) var(--ease-smooth), opacity var(--dur-fast) var(--ease-smooth);
}

.z1-prose a:hover {
  color: var(--color-accent-orange);
}

/* 7. z1-step */
.z1-step {
  padding: var(--space-32) var(--space-24);
  display: flex;
  flex-direction: column;
  gap: var(--space-16);
}

.z1-step__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-16);
  padding: var(--space-24);
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-main);
}

.z1-step__number {
  font-family: var(--font-display);
  font-size: var(--size-h1);
  line-height: 1;
  color: var(--color-accent-orange);
  font-weight: 700;
  min-width: 40px;
}

.z1-step__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.z1-step__title {
  font-size: var(--size-h3);
  line-height: var(--lh-h3);
  color: var(--color-text-main);
}

/* 8. z1-faq */
.z1-faq {
  padding: var(--space-32) var(--space-24);
  display: flex;
  flex-direction: column;
  gap: var(--space-16);
}

.z1-faq details {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-main);
  padding: var(--space-16) var(--space-24);
  transition: transform var(--dur-fast) var(--ease-smooth), opacity var(--dur-fast) var(--ease-smooth);
}

.z1-faq summary {
  font-family: var(--font-display);
  font-size: var(--size-h3);
  line-height: var(--lh-h3);
  color: var(--color-text-main);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.z1-faq summary::-webkit-details-marker {
  display: none;
}

.z1-faq summary::after {
  content: "+";
  font-size: 20px;
  color: var(--color-accent-orange);
  transition: transform var(--dur-fast) var(--ease-smooth);
}

.z1-faq details[open] summary::after {
  transform: rotate(45deg);
}

.z1-faq__answer {
  margin-top: var(--space-16);
  color: var(--color-text-muted);
  font-size: var(--size-base);
  line-height: var(--lh-base);
}

/* 9. z1-cta-final */
.z1-cta-final {
  padding: var(--space-48) var(--space-24);
  background-color: var(--color-bg-main);
  border-top: 1px solid var(--color-border);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-16);
}

.z1-cta-final__button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: var(--space-16) var(--space-32);
  background-color: var(--color-accent-orange);
  color: var(--color-text-on-orange);
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-main);
  border: none;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-smooth), opacity var(--dur-fast) var(--ease-smooth);
}

.z1-cta-final__button:hover {
  opacity: 0.92;
  transform: translateY(-2px);
}

/* Responsive Media Queries */
@media (min-width: 390px) {
  body {
    padding-inline: 0;
  }
}

@media (min-width: 720px) {
  .z1-promo-card__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  body {
    margin-top: var(--space-32);
    margin-bottom: var(--space-64);
    border-radius: var(--radius-main);
  }
}
/* --- bo sung lap rap (agent) --- */
.z1-header{position:sticky;top:0;z-index:200;display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background-color:var(--color-bg-surface);border-bottom:1px solid var(--color-border);max-width:var(--max-width-app);margin-inline:auto}
.z1-brand{font-family:var(--font-display);font-weight:700;font-size:20px;color:var(--color-text-main);text-decoration:none}
.z1-cta-header{background-color:var(--color-accent-orange);color:var(--color-text-on-orange);font-weight:700;padding:8px 14px;border-radius:10px;text-decoration:none;font-size:14px}
.z1-tab{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;flex:1;height:100%;color:var(--color-text-muted);text-decoration:none;font-size:12px}
.z1-tab[aria-current="page"]{color:var(--color-accent-orange);font-weight:700}
.z1-hero-img{width:100%;max-width:320px;border-radius:var(--radius-main);margin-bottom:var(--space-16)}
.z1-card-grid{display:grid;grid-template-columns:1fr;gap:var(--space-16)}
@media (min-width:720px){.z1-card-grid{grid-template-columns:repeat(2,1fr)}}
.z1-card-img{width:100%;height:auto;border-radius:var(--radius-main)}
.z1-cta-hero,.z1-cta-btn{display:inline-block;background-color:var(--color-accent-orange);color:var(--color-text-on-orange);font-weight:700;padding:14px 20px;border-radius:var(--radius-main);text-decoration:none;margin-top:var(--space-16)}
.z1-faq-item{border-bottom:1px solid var(--color-border);padding:var(--space-16) 0}
.z1-footer{max-width:var(--max-width-app);margin-inline:auto;padding:var(--space-32) var(--space-24) 96px;color:var(--color-text-muted);font-size:14px}
.z1-hub-children ul,.z1-support-links ul{list-style:none;padding:0;display:flex;flex-direction:column;gap:8px}
.z1-hub-children a,.z1-support-links a{color:var(--color-accent-dark);text-decoration:underline}
.z1-copy{margin-top:var(--space-24);font-size:12px}
.z1-cond-table table{width:100%;border-collapse:collapse}
.z1-cond-table th,.z1-cond-table td{border:1px solid var(--color-border);padding:8px 12px;text-align:left}
.z1-prose a,.z1-faq a{color:var(--color-accent-dark)}
main{display:block;max-width:var(--max-width-app);margin-inline:auto;padding-bottom:80px}
body{padding-bottom:64px}
@media (prefers-reduced-motion: reduce){*{animation-duration:0.001ms !important;animation-iteration-count:1 !important;transition-duration:0.001ms !important}}
.z1-step-icon{width:48px;height:48px;border-radius:10px;margin-bottom:8px}
.z1-inline-fig{margin:24px 0}
.z1-inline-img{width:100%;max-width:480px;border-radius:var(--radius-main);display:block;margin-inline:auto}

/* --- fix desktop layout (agy design pass, lane c) --- */


@media (min-width: 1024px) {
  body {
    max-width: 100%;
    box-shadow: none;
    border-radius: 0;
  }

  .z1-header,
  .z1-tabbar,
  main,
  .z1-footer {
    max-width: 1200px;
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    box-sizing: border-box;
  }

  .z1-tabbar {
    left: auto;
    transform: none;
  }

  .z1-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-left: 24px;
    padding-right: 24px;
  }

  .z1-tabbar {
    position: static;
    top: auto;
    bottom: auto;
    height: auto;
    max-height: none;
    flex-direction: row;
    justify-content: flex-start;
    align-items: center;
    gap: 24px;
    padding: 12px 24px;
    box-shadow: none;
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-bg-surface);
  }

  .z1-tab {
    flex-direction: row;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    height: auto;
    width: auto;
    color: var(--color-text-muted);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    border-radius: 0;
  }

  .z1-tab::before,
  .z1-tab::after {
    display: none;
  }

  .z1-tab:hover {
    color: var(--color-accent-dark);
  }

  .z1-tab[aria-current="page"] {
    color: var(--color-accent-orange);
    border-bottom-color: var(--color-accent-orange);
    font-weight: 600;
  }

  .z1-hero {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: center;
    gap: 40px;
    padding: 48px 24px;
    text-align: left;
  }

  .z1-hero-img {
    grid-column: 2;
    grid-row: 1 / span 10;
    width: 100%;
    max-height: 480px;
    object-fit: cover;
    border-radius: var(--radius-main);
  }

  .z1-hero h1 {
    grid-column: 1;
    grid-row: 1;
    margin-top: 0;
    margin-bottom: 16px;
  }

  .z1-hero .z1-cta-hero {
    grid-column: 1;
    justify-self: start;
    margin-top: 24px;
  }

  .z1-card-grid,
  .z1-promo-cards {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .z1-prose,
  .z1-cond-table,
  .z1-step,
  .z1-faq,
  .z1-cta-final {
    max-width: var(--max-width-prose);
    margin-left: auto;
    margin-right: auto;
  }
}