@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500&family=Inter:wght@400;500&family=JetBrains+Mono:wght@400;500&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+Thai:wght@400;500&family=Noto+Sans+SC:wght@400;500&display=swap");

:root {
  /* Brand primary — note: hover is LIGHTER, pressed is DARKER */
  --thaihao-primary: #AC0022;
  --thaihao-primary-hover: #C81F35;
  --thaihao-primary-pressed: #800017;
  --thaihao-primary-tint: #fdf3f4;
  --thaihao-on-primary: #ffffff;

  /* Surface — neutral cool gray tonal ladder */
  --surface: #f7f8fa;
  --surface-container-lowest: #ffffff;
  --surface-container-low: #f1f2f6;
  --surface-container: #e7e9ef;
  --surface-container-high: #dde0e8;
  --surface-container-highest: #d2d6e0;
  --on-surface: #15181d;
  --on-surface-variant: #686d78;
  --outline: #9ca1ac;
  --outline-variant: #e2e4ea;

  /* Semantic */
  --bg-info: #dbeafe;     --on-info: #1e3a8a;     --border-info: #93c5fd;
  --bg-success: #dcfce7;  --on-success: #14532d;  --border-success: #86efac;
  --bg-warning: #fef3c7;  --on-warning: #78350f;  --border-warning: #fde68a;
  --bg-danger: #ffdad6;   --on-danger: #93000a;   --border-danger: #fda4af;

  /* Type — families */
  --font-display: "IBM Plex Sans", "Noto Sans Thai", "Noto Sans SC", system-ui, sans-serif;
  --font-sans:    "Inter", "Noto Sans Thai", "Noto Sans SC", system-ui, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, "SFMono-Regular", monospace;

  /* Type — weights (D1: only these two) */
  --fw-regular: 400;
  --fw-medium:  500;

  /* Spacing — 4px base */
  --space-1: 4px;  --space-2: 8px;  --space-3: 12px;  --space-4: 16px;
  --space-5: 20px; --space-6: 24px; --space-8: 32px;  --space-10: 40px;
  --space-12: 48px; --space-16: 64px;
  --container-max: 1280px;

  /* Borders — signature thin */
  --border-thin:    0.5px;
  --border-default: 1px;
  --border-thick:   2px;

  /* Radii */
  --r-sm: 2px; --r: 4px; --r-md: 6px; --r-lg: 8px; --r-xl: 12px; --r-full: 9999px;

  /* Elevation */
  --shadow-floating: 0 10px 15px -3px rgba(0,0,0,0.05), 0 4px 6px -2px rgba(0,0,0,0.025);
  --shadow-modal:    0 25px 50px -12px rgba(0,0,0,0.10);

  /* Motion */
  --motion-fast: 150ms ease-out;
  --motion-default: 200ms ease-out;
  --motion-slow: 250ms ease-out;

  /* Focus ring */
  --focus-ring: 0 0 0 2px var(--surface), 0 0 0 4px var(--thaihao-primary);
}

@media (prefers-reduced-motion: reduce) {
  :root { --motion-fast: 0ms; --motion-default: 0ms; --motion-slow: 0ms; }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html, body {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 20px;
  font-weight: 400;
  color: var(--on-surface);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

/* Type role classes */
.display-lg  { font-family: var(--font-display); font-size: 56px; line-height: 64px;
  letter-spacing: -0.025em; font-weight: 500; color: var(--on-surface); }
.headline-md { font-family: var(--font-display); font-size: 24px; line-height: 32px;
  font-weight: 500; color: var(--on-surface); letter-spacing: -0.01em; }
.title-sm    { font-family: var(--font-sans); font-size: 18px; line-height: 28px;
  font-weight: 500; color: var(--on-surface); }
.body-md     { font-family: var(--font-sans); font-size: 14px; line-height: 22px;
  font-weight: 400; color: var(--on-surface); }
.body-sm     { font-family: var(--font-sans); font-size: 13px; line-height: 18px;
  font-weight: 400; color: var(--on-surface-variant); }
.label-caps  { font-family: var(--font-sans); font-size: 11px; line-height: 16px;
  letter-spacing: 0.08em; font-weight: 500; text-transform: uppercase;
  color: var(--on-surface-variant); }
.data-mono   { font-family: var(--font-mono); font-size: 13px; line-height: 16px;
  font-weight: 500; font-variant-numeric: tabular-nums; color: var(--on-surface); }

@media (max-width: 640px) {
  .display-lg { font-size: 32px; line-height: 38px; letter-spacing: -0.02em; }
  .headline-md { font-size: 20px; line-height: 28px; }
}

:where(button, a, input, select, textarea, [tabindex]):focus-visible {
  outline: none; box-shadow: var(--focus-ring); border-radius: var(--r);
}

/* ============ Page layout ============ */

.page {
  min-height: 100vh;
  background: var(--surface);
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 32px;
}
@media (max-width: 640px) {
  .container { padding: 0 16px; }
}

/* ============ Topbar ============ */

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: transparent;
  transition: background-color var(--motion-default),
              backdrop-filter var(--motion-default),
              border-color var(--motion-default);
  border-bottom: var(--border-thin) solid transparent;
}
.topbar.scrolled {
  background: rgba(247, 248, 250, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: var(--outline-variant);
}
.topbar__inner {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}
.wordmark {
  display: inline-block;
  height: 28px;
  width: auto;
  user-select: none;
  vertical-align: middle;
}
.wordmark--md { height: 32px; }
.wordmark--lg { height: 40px; }

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}
.nav__link {
  font-size: 14px;
  line-height: 20px;
  color: var(--on-surface-variant);
  transition: color var(--motion-fast);
  padding: 4px 0;
}
.nav__link:hover { color: var(--on-surface); }
@media (max-width: 640px) {
  .nav { gap: var(--space-5); }
  .nav__link { font-size: 13px; }
}
@media (max-width: 420px) {
  .nav { display: none; }
}

.lang {
  display: inline-flex;
  background: var(--surface-container-lowest);
  border: var(--border-thin) solid var(--outline-variant);
  border-radius: var(--r);
  padding: 2px;
  gap: 0;
}
.lang__btn {
  appearance: none;
  background: transparent;
  border: 0;
  cursor: pointer;
  padding: 4px 10px;
  font-size: 12px;
  line-height: 16px;
  color: var(--on-surface-variant);
  border-radius: var(--r-sm);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: background-color var(--motion-fast), color var(--motion-fast);
}
.lang__btn:hover { color: var(--on-surface); }
.lang__btn[aria-pressed="true"] {
  background: var(--surface-container-low);
  color: var(--on-surface);
}
.lang__flag { font-size: 13px; line-height: 1; }

/* ============ Buttons ============ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: var(--r-md);
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 14px;
  line-height: 20px;
  border: 0;
  cursor: pointer;
  transition: background-color var(--motion-fast), color var(--motion-fast),
              transform var(--motion-fast);
  text-decoration: none;
  white-space: nowrap;
}
.btn--primary {
  background: var(--thaihao-primary);
  color: var(--thaihao-on-primary);
}
.btn--primary:hover { background: var(--thaihao-primary-hover); }
.btn--primary:active { background: var(--thaihao-primary-pressed); transform: translateY(0.5px); }
.btn--primary .ti { font-size: 16px; }
.btn--lg {
  padding: 14px 24px;
  font-size: 15px;
}

/* ============ Sections ============ */

.section {
  padding: var(--space-16) 0;
}
.section--lowest { background: var(--surface-container-lowest); }
.section--low { background: var(--surface-container-low); }
.section--container { background: var(--surface-container); }

@media (max-width: 640px) {
  .section { padding: var(--space-12) 0; }
}

/* ============ Hero ============ */

.hero {
  min-height: 80vh;
  display: flex;
  align-items: center;
  padding: 96px 0 var(--space-16);
}
.hero__inner {
  max-width: 960px;
}
.hero__eyebrow {
  display: inline-block;
  color: var(--thaihao-primary);
  margin-bottom: var(--space-5);
}
.hero__accent {
  width: 2px;
  height: 40px;
  background: var(--thaihao-primary);
  margin: 0 0 var(--space-8) 0;
  border-radius: 1px;
}
.hero__headline {
  margin: 0 0 var(--space-6) 0;
  white-space: pre-line;
}
.hero__sub {
  font-family: var(--font-sans);
  font-size: 18px;
  line-height: 28px;
  color: var(--on-surface-variant);
  font-weight: 400;
  max-width: 640px;
  margin: 0 0 var(--space-10) 0;
}
.hero__cta-row {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-4);
}
.hero__cta-line {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
}
.hero__secondary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--on-surface);
  font-size: 14px;
  line-height: 20px;
  font-weight: 500;
  padding: 8px 4px;
  border-bottom: 1px solid var(--outline-variant);
  transition: color var(--motion-fast), border-color var(--motion-fast);
}
.hero__secondary:hover {
  color: var(--on-surface);
  border-bottom-color: var(--on-surface);
}
.hero__secondary .ti { font-size: 14px; }
.hero__note { color: var(--on-surface-variant); }

/* ============ FAQ ============ */

.faq__list {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 0.5px solid var(--outline-variant);
}
.faq__item {
  border-bottom: 0.5px solid var(--outline-variant);
  padding: 0;
}
.faq__summary {
  list-style: none;
  cursor: pointer;
  padding: var(--space-6) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  color: var(--on-surface);
}
.faq__summary::-webkit-details-marker { display: none; }
.faq__summary .ti {
  font-size: 20px;
  color: var(--on-surface-variant);
  transition: transform var(--motion-default);
}
.faq__item[open] .faq__summary .ti { transform: rotate(45deg); }
.faq__answer {
  padding: 0 0 var(--space-6) 0;
  color: var(--on-surface-variant);
  max-width: 720px;
}

/* ============ Value Prop ============ */

.cols-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-12);
}
@media (max-width: 900px) {
  .cols-3 { grid-template-columns: 1fr; gap: var(--space-10); }
}
.vp__icon {
  font-size: 32px;
  color: var(--thaihao-primary);
  margin-bottom: var(--space-5);
  display: block;
  line-height: 1;
}
.vp__title { margin: 0 0 var(--space-3) 0; }
.vp__desc { margin: 0; color: var(--on-surface-variant); max-width: 360px; }

/* ============ Section heading ============ */
.section__lede {
  margin-bottom: var(--space-12);
  max-width: 720px;
}
.section__eyebrow {
  display: block;
  margin-bottom: var(--space-4);
}
.section__title { margin: 0; }

/* ============ For Whom ============ */

.cards-2x2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}
@media (max-width: 720px) {
  .cards-2x2 { grid-template-columns: 1fr; }
}
.card {
  background: var(--surface-container-lowest);
  border: var(--border-thin) solid var(--outline-variant);
  border-radius: var(--r-lg);
  padding: var(--space-6);
  transition: border-color var(--motion-fast), transform var(--motion-fast);
}
.card:hover {
  border-color: var(--outline);
}
.card__icon {
  font-size: 24px;
  color: var(--thaihao-primary);
  margin-bottom: var(--space-5);
  display: block;
  line-height: 1;
}
.card__title { margin: 0 0 var(--space-2) 0; }
.card__desc { margin: 0; color: var(--on-surface-variant); }

/* ============ Steps ============ */

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}
.step {
  padding: 0 var(--space-6) 0 0;
  position: relative;
}
.step__head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin: 0 0 var(--space-6) 0;
  height: 24px;
}
.step__line {
  flex: 1;
  height: 1px;
  background: var(--outline-variant);
}
.step__num {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 24px;
  font-weight: 500;
  color: var(--on-surface-variant);
  font-variant-numeric: tabular-nums;
  display: inline-block;
  flex-shrink: 0;
}
.step__title { margin: 0 0 var(--space-2) 0; }
.step__desc { margin: 0; color: var(--on-surface-variant); max-width: 240px; }

@media (max-width: 900px) {
  .steps { grid-template-columns: 1fr; gap: var(--space-8); }
  .step { padding: 0 0 var(--space-8) 0; border-bottom: 0.5px solid var(--outline-variant); }
  .step:last-child { border-bottom: 0; padding-bottom: 0; }
  .step__line { display: none; }
}

/* ============ Trust ============ */

.trust {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}
@media (max-width: 720px) {
  .trust { grid-template-columns: 1fr; gap: var(--space-6); }
}
.trust__row {
  padding: var(--space-8) 0;
  border-top: 0.5px solid var(--outline-variant);
}
.trust__value { margin: 0 0 var(--space-3) 0; }
.trust__caption { display: block; }

/* ============ CTA repeat ============ */
.cta-repeat {
  padding: 96px 0;
  text-align: center;
}
.cta-repeat__title { margin: 0 0 var(--space-3) 0; }
.cta-repeat__sub { margin: 0 0 var(--space-8) 0; color: var(--on-surface-variant); max-width: 560px; margin-left: auto; margin-right: auto; }
.cta-repeat__note { margin: var(--space-4) 0 0 0; color: var(--on-surface-variant); }

/* ============ Footer ============ */

.footer {
  padding: var(--space-16) 0 var(--space-10);
}
.footer__top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-10);
  border-bottom: 0.5px solid var(--outline-variant);
}
@media (max-width: 720px) {
  .footer__top { grid-template-columns: 1fr; gap: var(--space-8); }
}
.footer__tag { color: var(--on-surface-variant); margin: var(--space-3) 0 0 0; max-width: 320px; }
.footer__col-title {
  display: block;
  margin-bottom: var(--space-4);
}
.footer__list {
  margin: 0; padding: 0; list-style: none;
  display: flex; flex-direction: column; gap: var(--space-3);
}
.footer__list li {
  display: flex; align-items: center; gap: var(--space-3);
  color: var(--on-surface);
  font-size: 13px; line-height: 18px;
}
.footer__list .ti { font-size: 16px; color: var(--on-surface-variant); }
.footer__list a:hover { color: var(--on-surface-variant); }
.footer__bottom {
  padding-top: var(--space-8);
  color: var(--on-surface-variant);
  font-size: 13px; line-height: 18px;
  display: flex; justify-content: space-between; gap: var(--space-4);
  flex-wrap: wrap;
}

/* ============ Scroll reveal ============ */

.reveal {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 400ms ease-out, transform 400ms ease-out;
  will-change: opacity, transform;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

.hero__sub, .vp__desc, .card__desc, .step__desc, .cta-repeat__sub, .hero__headline {
  text-wrap: pretty;
}

/* ============================================================ */
/* Effects layer                                                 */
/* ============================================================ */

/* Hero — pulse dot */

.hero { position: relative; }

.hero__eyebrow-row {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: var(--space-5);
}
.hero__eyebrow { color: var(--thaihao-primary); margin: 0; }
.hero__pulse {
  position: relative;
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: var(--r-full);
  background: var(--thaihao-primary);
  flex-shrink: 0;
}
.hero__pulse::before,
.hero__pulse::after {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: var(--r-full);
  border: 1px solid var(--thaihao-primary);
  opacity: 0;
  animation: pulse-ring 2.4s cubic-bezier(0.16, 1, 0.3, 1) infinite;
}
.hero__pulse::after { animation-delay: 1.2s; }
@keyframes pulse-ring {
  0%   { transform: scale(1);   opacity: 0.5; }
  100% { transform: scale(3.4); opacity: 0;   }
}
@media (prefers-reduced-motion: reduce) {
  .hero__pulse::before, .hero__pulse::after { animation: none; display: none; }
}

/* Hero accent line draws in */
.hero__accent {
  height: 0;
  transition: height 700ms cubic-bezier(0.16, 1, 0.3, 1) 250ms;
}
.reveal.is-visible .hero__accent { height: 40px; }
@media (prefers-reduced-motion: reduce) {
  .hero__accent { height: 40px; transition: none; }
}

/* Headline — per-line stagger */
.hero__headline { display: block; }
.hero__headline .line {
  display: block;
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 700ms ease-out, transform 700ms cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.is-visible .hero__headline .line { opacity: 1; transform: translateY(0); }
.reveal.is-visible .hero__headline .line:nth-child(1) { transition-delay: 380ms; }
.reveal.is-visible .hero__headline .line:nth-child(2) { transition-delay: 490ms; }
.reveal.is-visible .hero__headline .line:nth-child(3) { transition-delay: 600ms; }
.reveal.is-visible .hero__headline .line:nth-child(4) { transition-delay: 710ms; }
@media (prefers-reduced-motion: reduce) {
  .hero__headline .line { opacity: 1; transform: none; transition: none; }
}

/* Scroll hint */
.hero__scroll-hint {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--on-surface-variant);
  font-family: var(--font-sans);
  font-size: 11px;
  line-height: 16px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 500;
  opacity: 0;
  animation: hint-in 800ms ease-out 1400ms forwards;
  pointer-events: none;
}
.hero__scroll-hint .ti {
  font-size: 16px;
  animation: hint-bob 2.4s cubic-bezier(0.5, 0, 0.5, 1) infinite;
}
@keyframes hint-in { to { opacity: 1; } }
@keyframes hint-bob {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(4px); }
}
@media (prefers-reduced-motion: reduce) {
  .hero__scroll-hint { animation: none; opacity: 1; }
  .hero__scroll-hint .ti { animation: none; }
}
@media (max-width: 640px) { .hero__scroll-hint { display: none; } }

/* Marquee strip */
.marquee {
  background: var(--surface-container-lowest);
  border-top: 0.5px solid var(--outline-variant);
  border-bottom: 0.5px solid var(--outline-variant);
  overflow: hidden;
  padding: var(--space-4) 0;
  -webkit-mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
  mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
}
.marquee__track {
  display: flex;
  gap: var(--space-10);
  width: max-content;
  animation: marquee 60s linear infinite;
  will-change: transform;
}
.marquee__item {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 16px;
  font-weight: 500;
  color: var(--on-surface-variant);
  letter-spacing: 0.04em;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: var(--space-10);
}
.marquee__item::after {
  content: "";
  display: inline-block;
  width: 4px;
  height: 4px;
  border-radius: var(--r-full);
  background: var(--outline);
  opacity: 0.5;
}
@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .marquee__track { animation: none; }
}

/* Step connector animation */
.step__line {
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 800ms cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.is-visible .step__line { transform: scaleX(1); }
.reveal.is-visible .step:nth-child(1) .step__line { transition-delay: 350ms; }
.reveal.is-visible .step:nth-child(2) .step__line { transition-delay: 500ms; }
.reveal.is-visible .step:nth-child(3) .step__line { transition-delay: 650ms; }
@media (prefers-reduced-motion: reduce) {
  .step__line { transform: scaleX(1); transition: none; }
}

/* Topbar nav underline */
.nav__link { position: relative; }
.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--on-surface);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--motion-default);
}
.nav__link:hover::after { transform: scaleX(1); }

/* For-whom card hover */
.card {
  position: relative;
  overflow: hidden;
  transition: border-color var(--motion-fast), transform var(--motion-default),
              background-color var(--motion-default);
}
.card__arrow {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  font-size: 18px;
  color: var(--on-surface-variant);
  opacity: 0;
  transform: translate(-4px, 4px);
  transition: opacity var(--motion-default), transform var(--motion-default);
  pointer-events: none;
}
.card:hover {
  transform: translateY(-2px);
  border-color: var(--outline);
}
.card:hover .card__arrow {
  opacity: 1;
  transform: translate(0, 0);
}

/* Primary button hover micro-lift */
.btn--primary {
  box-shadow: 0 1px 2px rgba(172, 0, 34, 0);
}
.btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 22px -10px rgba(172, 0, 34, 0.45);
}
.btn--primary:active {
  transform: translateY(0);
  box-shadow: 0 1px 2px rgba(172, 0, 34, 0.2);
}

@media (prefers-reduced-motion: reduce) {
  .btn--primary:hover { transform: none; }
  .card:hover { transform: none; }
}