:root {
  --teal: #0E716B;
  --teal-deep: #084A46;
  --teal-night: #05302D;
  --mint: #5CC4B8;
  --ink: #121413;
  --night: #151918;
  --cream: #F4F1EA;
  --paper: #FFFFFF;
  --band: #EEF6F4;

  --bg: var(--paper);
  --text: var(--ink);
  --muted: #4A5552;
  --accent: var(--teal);
  --accent-text: var(--paper);
  --rule: #D6E4E1;
  --focus: var(--teal);

  --high: #C62E2E;
  --suspicious: #D9730D;
  --none: #8A9491;

  --display: "Archivo", "Kantumruy Pro", system-ui, sans-serif;
  --body: "Kantumruy Pro", system-ui, sans-serif;
  --diamond-pattern: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='56' height='56' viewBox='0 0 56 56'%3E%3Crect x='20' y='20' width='16' height='16' rx='4.3' transform='rotate(45 28 28)' fill='%235CC4B8' fill-opacity='0.08'/%3E%3C/svg%3E");

  --leading: 1.8;
  --measure: 34rem;
  color-scheme: light dark;
}

:lang(en) {
  --leading: 1.55;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: var(--night);
    --text: var(--cream);
    --muted: #B5BDB9;
    --accent: var(--mint);
    --accent-text: var(--night);
    --rule: #2A3331;
    --band: #1C2321;
    --focus: var(--mint);
    --high: #F06A6A;
    --suspicious: #F2A048;
    --none: #A7B0AD;
  }
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--body);
  font-size: 1rem;
  line-height: var(--leading);
}

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

a {
  color: var(--accent);
  text-underline-offset: 0.2em;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}

.wrap {
  width: min(72rem, 100% - 2rem);
  margin-inline: auto;
}

/* Header */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.25rem;
}

.logo img {
  height: 2rem;
  width: auto;
}

.logo .on-dark {
  display: none;
}

@media (prefers-color-scheme: dark) {
  .logo .on-light {
    display: none;
  }

  .logo .on-dark {
    display: block;
  }
}

.lang-switch {
  font-weight: 500;
  text-decoration: none;
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
}

/* Hero */

.hero {
  display: grid;
  gap: 2.5rem;
  padding-block: 2rem 4rem;
}

@media (min-width: 60rem) {
  .hero {
    grid-template-columns: 1fr 26rem;
    align-items: start;
    gap: 4rem;
    padding-block: 3rem 6rem;
  }

  .hero > :first-child {
    padding-top: 2.5rem;
  }
}

h1,
h2 {
  font-family: var(--display);
  font-stretch: 125%;
  font-weight: 800;
  margin: 0;
}

h1 {
  font-size: clamp(2.75rem, 9vw, 4.75rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

h1:lang(km) {
  font-weight: 700;
  line-height: 1.45;
}

@media (max-width: 40rem) {
  h1:lang(en) {
    font-size: 2.4rem;
  }
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  line-height: 1.25;
}

h2:lang(km) {
  font-weight: 700;
  line-height: 1.6;
}

.lede {
  font-size: 1.25rem;
  max-width: var(--measure);
  margin: 1.25rem 0 2rem;
  color: var(--muted);
}

.cta-row {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.cta {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.4rem;
  border-radius: 12px;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
  font-size: 1.1rem;
  text-decoration: none;
}

.cta:hover {
  background: var(--teal-deep);
  color: var(--paper);
}

.cta svg {
  width: 1.3rem;
  height: 1.3rem;
}

@media (max-width: 40rem) {
  .cta {
    width: 100%;
    justify-content: center;
    padding-block: 1rem;
  }
}

.qr {
  display: none;
  align-items: center;
  gap: 0.75rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.qr img {
  width: 5.5rem;
  height: 5.5rem;
  padding: 0.35rem;
  background: var(--paper);
  border-radius: 8px;
}

@media (min-width: 60rem) and (hover: hover) {
  .qr {
    display: flex;
  }
}

/* Chat demo */

.demo {
  min-width: 0;
}

.phone {
  border-radius: 28px;
  overflow: hidden;
  background-color: var(--teal-deep);
  background-image: var(--diamond-pattern);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06) inset, 0 24px 48px -24px rgba(5, 48, 45, 0.55);
}

.phone-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  background: var(--teal-night);
  color: var(--cream);
}

.phone-bar img {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 50%;
}

.phone-bar strong {
  display: block;
  font-weight: 600;
  line-height: 1.3;
}

.phone-bar span {
  font-size: 0.85rem;
  opacity: 0.75;
}

.thread {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  min-height: 26rem;
  padding: 1.25rem 1rem 1.5rem;
}

.bubble {
  max-width: 88%;
  padding: 0.65rem 0.9rem;
  border-radius: 16px;
  font-size: 0.95rem;
  line-height: 1.75;
  white-space: pre-line;
  overflow-wrap: anywhere;
}

.bubble.user {
  align-self: flex-end;
  background: #D8F2EE;
  color: var(--ink);
  border-bottom-right-radius: 4px;
}

.bubble.bot {
  align-self: flex-start;
  background: var(--paper);
  color: var(--ink);
  border-bottom-left-radius: 4px;
}

.bubble .level {
  display: block;
  font-weight: 700;
}

.bubble .level.high {
  color: #B42323;
}

.bubble .level.suspicious {
  color: #B35C05;
}

.bubble .gloss {
  display: block;
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid rgba(18, 20, 19, 0.12);
  color: #4A5552;
  font-size: 0.85rem;
  line-height: 1.5;
}

.bubble.photo {
  padding: 0;
  background: none;
}

.bubble.photo .gloss {
  max-width: 12rem;
  border-top: 0;
  color: rgba(244, 241, 234, 0.8);
}

.khqr-card {
  width: 12rem;
  border-radius: 16px;
  overflow: hidden;
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 6px 18px -6px rgba(0, 0, 0, 0.45);
}

.khqr-head {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 2.75rem;
  background: #E1232E;
}

/* The KHQR card's red header has a corner tab hanging off its right edge. */
.khqr-head::after {
  content: "";
  position: absolute;
  right: 0;
  top: 100%;
  border-top: 1rem solid #E1232E;
  border-left: 1rem solid transparent;
}

.khqr-head b {
  color: var(--paper);
  font-family: var(--display);
  font-stretch: 125%;
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: 0.03em;
}

.khqr-body {
  padding: 0.85rem 1.1rem 0.75rem;
  line-height: 1.3;
}

.khqr-name {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  color: #4A5552;
}

.khqr-amount {
  display: block;
  margin-top: 0.15rem;
  font-size: 1.4rem;
  font-weight: 700;
}

.khqr-amount small {
  margin-left: 0.3rem;
  font-size: 0.7rem;
  font-weight: 500;
  color: #4A5552;
}

.khqr-card hr {
  margin: 0;
  border: 0;
  border-top: 1.5px dashed #C9CFCD;
}

.khqr-code {
  position: relative;
  padding: 1.1rem;
}

.khqr-mark {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border: 3px solid var(--paper);
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 0;
  transform: translate(-50%, -50%);
}

.typing {
  align-self: flex-start;
  display: flex;
  gap: 0.3rem;
  padding: 0.9rem 1rem;
  border-radius: 16px;
  background: var(--paper);
}

.typing span {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--teal);
  animation: blink 1s infinite ease-in-out;
}

.typing span:nth-child(2) {
  animation-delay: 0.15s;
}

.typing span:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes blink {
  50% {
    opacity: 0.25;
  }
}

.reveal {
  animation: rise 0.28s ease-out;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .typing span {
    animation: none;
  }
}

.samples {
  display: none;
  margin-top: 1rem;
}

.js .samples {
  display: block;
}

.samples p {
  margin: 0 0 0.5rem;
  font-weight: 500;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.chips button {
  font: inherit;
  font-size: 0.95rem;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--text);
  cursor: pointer;
}

.chips button:hover {
  border-color: var(--accent);
}

.chips button[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}

.demo-note {
  margin: 0.75rem 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

/* Sections */

.section {
  padding-block: 3.5rem;
  border-top: 1px solid var(--rule);
}

.section.band {
  background: var(--band);
  border-top: 0;
}

.section .intro {
  max-width: var(--measure);
  color: var(--muted);
  margin: 0.75rem 0 0;
}

.diamonds {
  display: grid;
  gap: 1.5rem 3rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 48rem) {
  .diamonds.two {
    grid-template-columns: 1fr 1fr;
  }
}

.diamonds li {
  position: relative;
  padding-left: 2rem;
  max-width: var(--measure);
}

.diamonds li::before {
  content: "";
  position: absolute;
  left: 0.2rem;
  top: 0.55em;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 3px;
  background: var(--accent);
  transform: rotate(45deg);
}

.diamonds strong {
  display: block;
  font-size: 1.15rem;
  font-weight: 600;
}

.diamonds p {
  margin: 0.25rem 0 0;
  color: var(--muted);
}

.levels {
  display: grid;
  gap: 1.25rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 48rem) {
  .levels {
    grid-template-columns: repeat(4, 1fr);
  }
}

.levels li {
  padding-top: 0.9rem;
  border-top: 4px solid var(--none);
}

.levels li.high {
  border-top-color: var(--high);
}

.levels li.suspicious {
  border-top-color: var(--suspicious);
}

.levels strong {
  display: block;
  font-weight: 600;
  font-size: 1.05rem;
}

.levels p {
  margin: 0.35rem 0 0;
  color: var(--muted);
}

.reminder {
  margin: 2rem 0 0;
  max-width: var(--measure);
  font-weight: 500;
}

.faq-list {
  margin-top: 2rem;
  max-width: 48rem;
  border-bottom: 1px solid var(--rule);
}

.faq details {
  border-top: 1px solid var(--rule);
}

.faq summary {
  position: relative;
  padding: 1.1rem 0 1.1rem 2rem;
  font-size: 1.1rem;
  font-weight: 600;
  list-style: none;
  cursor: pointer;
}

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

.faq summary::before {
  content: "";
  position: absolute;
  left: 0.2rem;
  top: calc(1.1rem + 0.6em);
  width: 0.7rem;
  height: 0.7rem;
  border: 2px solid var(--accent);
  border-radius: 3px;
  transform: rotate(45deg);
  transition: background-color 0.2s;
}

.faq details[open] summary::before {
  background: var(--accent);
}

.faq details p {
  margin: -0.35rem 0 0;
  padding: 0 0 1.25rem 2rem;
  max-width: var(--measure);
  color: var(--muted);
}

.section.privacy {
  padding-block: clamp(3.5rem, 8vw, 4.5rem);
  border-top: 0;
  background-color: var(--teal-night);
  background-image: var(--diamond-pattern);
  color: var(--cream);
}

.privacy-grid {
  display: grid;
  gap: 2.5rem;
}

@media (min-width: 60rem) {
  .privacy-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
    gap: 5rem;
  }
}

.privacy h2 {
  color: var(--mint);
  font-size: 1.25rem;
}

.privacy-claim {
  margin: 0.75rem 0 0;
  font-family: var(--display);
  font-stretch: 125%;
  font-weight: 800;
  font-size: clamp(2rem, 4.5vw, 3rem);
  line-height: 1.15;
}

.privacy-claim:lang(km) {
  font-weight: 700;
  line-height: 1.6;
}

.section.privacy .intro {
  margin-top: 1.25rem;
  color: rgba(244, 241, 234, 0.75);
}

.privacy a {
  color: var(--mint);
}

.privacy-facts {
  margin: 0;
  border-bottom: 1px solid rgba(92, 196, 184, 0.25);
}

.privacy-facts div {
  display: grid;
  gap: 0.35rem 2rem;
  padding-block: 1.35rem;
  border-top: 1px solid rgba(92, 196, 184, 0.25);
}

@media (min-width: 40rem) {
  .privacy-facts div {
    grid-template-columns: 10rem 1fr;
  }
}

.privacy-facts dt {
  color: var(--mint);
  font-weight: 600;
}

.privacy-facts dd {
  margin: 0;
  color: rgba(244, 241, 234, 0.85);
}

.privacy-facts strong {
  display: block;
  margin-top: 0.6rem;
  padding-left: 0.85rem;
  border-left: 3px solid var(--mint);
  color: var(--cream);
  font-weight: 600;
}

.privacy code {
  padding: 0.1em 0.45em;
  border-radius: 6px;
  background: rgba(92, 196, 184, 0.16);
  color: var(--cream);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
}

/* Footer */

.site-footer {
  padding-block: 2.5rem 3rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  align-items: center;
  justify-content: space-between;
}

.site-footer p {
  margin: 0;
  max-width: var(--measure);
}

.site-footer nav {
  display: flex;
  gap: 0.5rem;
  margin-inline: -0.5rem;
}

.site-footer nav a {
  padding: 0.5rem;
}