:root {
  --bg: #fbf8f6;
  --surface: #ffffff;
  --surface-2: #f4efeb;
  --text: #1f1612;
  --sub: #6b5f59;
  --line: #ebe3de;
  --accent: #e8461e;
  --accent-2: #ff8f5e;
  --accent-ink: #ffffff;
  --accent-soft: #ffe9e0;
  --key: #ffffff;
  --key-line: #d9d0ca;
  --shadow: 0 1px 2px rgb(40 20 10 / 6%), 0 12px 32px rgb(40 20 10 / 8%);
  --radius: 14px;
  --font: "Segoe UI Variable Text", "Segoe UI", "Leelawadee UI", "Noto Sans Thai", "IBM Plex Sans Thai",
    system-ui, -apple-system, sans-serif;
  --mono: "Cascadia Mono", "Consolas", ui-monospace, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171211;
    --surface: #211a18;
    --surface-2: #2a2220;
    --text: #f6efeb;
    --sub: #b9aca6;
    --line: #362c29;
    --accent: #ff6b3d;
    --accent-2: #ff9a6b;
    --accent-ink: #1a0a05;
    --accent-soft: #3a2018;
    --key: #2c2422;
    --key-line: #4a3e3a;
    --shadow: 0 1px 2px rgb(0 0 0 / 30%), 0 12px 32px rgb(0 0 0 / 35%);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 var(--font);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

code { font-family: var(--mono); font-size: 0.92em; background: var(--surface-2); padding: 0.1em 0.35em; border-radius: 6px; }

kbd {
  display: inline-block;
  min-width: 1.9em;
  padding: 0.05em 0.5em;
  font: 600 0.82em/1.6 var(--font);
  text-align: center;
  background: var(--key);
  border: 1px solid var(--key-line);
  border-bottom-width: 2px;
  border-radius: 6px;
  color: var(--text);
}

main, .top, footer { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

section { padding: 72px 0 8px; scroll-margin-top: 64px; }

h1, h2, h3 { line-height: 1.25; margin: 0; }
h2 { font-size: clamp(1.6rem, 3vw, 2.1rem); letter-spacing: -0.01em; }
h3 { font-size: 1.1rem; }

.section-lead { color: var(--sub); max-width: 640px; margin: 10px 0 24px; }

/* Header */

.top {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 72px;
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
}

.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; font-size: 1.1rem; }
.brand:hover { text-decoration: none; }
.brand small { font-weight: 500; color: var(--sub); font-size: 0.85rem; margin-left: 4px; }

nav { display: flex; gap: 22px; margin-left: auto; }
nav a { color: var(--sub); font-size: 0.95rem; }
nav a:hover { color: var(--text); text-decoration: none; }

.lang {
  font: 600 0.85rem var(--font);
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 14px;
  cursor: pointer;
}
.lang:hover { border-color: var(--key-line); }

/* Buttons */

.button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border-radius: 12px;
  font-weight: 600;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--line);
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.button:hover { text-decoration: none; transform: translateY(-1px); box-shadow: var(--shadow); }
.button svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.button.primary {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(180deg, var(--accent-2), var(--accent));
  box-shadow: 0 6px 18px rgb(232 70 30 / 28%);
}
.button.small { padding: 8px 16px; font-size: 0.95rem; }

/* Hero */

.hero {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: center;
  padding-top: 56px;
}

.eyebrow { margin: 0 0 14px; color: var(--accent); font-weight: 600; font-size: 0.95rem; }

h1 { font-size: clamp(2.4rem, 5.4vw, 3.7rem); letter-spacing: -0.02em; font-weight: 750; }
h1 em { font-style: normal; color: var(--accent); }

.lead { font-size: 1.15rem; color: var(--sub); margin: 20px 0 28px; max-width: 520px; }
.lead b { color: var(--text); }

.cta { display: flex; gap: 12px; flex-wrap: wrap; }
.meta { color: var(--sub); font-size: 0.88rem; margin-top: 16px; }

.demo { display: flex; justify-content: center; }

.window {
  width: min(440px, 100%);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  overflow: hidden;
  transform: rotate(-1.5deg);
}
.window-bar { display: flex; gap: 6px; padding: 12px 14px; border-bottom: 1px solid var(--line); }
.window-bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--line); }
.window-body { position: relative; padding: 24px 20px 70px; min-height: 220px; }

.chat { margin: 0 0 12px; padding: 10px 14px; border-radius: 16px; width: fit-content; max-width: 80%; font-size: 1.05rem; }
.chat.other { background: var(--surface-2); border-bottom-left-radius: 4px; }
.chat.me { margin-left: auto; background: var(--accent-soft); border-bottom-right-radius: 4px; min-height: 1.65em; min-width: 3em; }
.caret { display: inline-block; width: 2px; height: 1.1em; background: var(--text); vertical-align: -0.15em; margin-left: 1px; animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.bubble {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: var(--shadow);
  font-size: 1rem;
  white-space: nowrap;
  transition: opacity 0.15s ease, transform 0.15s ease;
}
.bubble .badge { font: 700 0.7rem/1 var(--font); color: #fff; background: var(--accent); padding: 4px 7px; border-radius: 999px; }
.bubble .key { font: 600 0.75rem/1 var(--font); color: var(--sub); background: var(--surface-2); padding: 5px 8px; border-radius: 6px; }

#demo-bubble { right: 20px; top: 150px; opacity: 0; transform: translateY(6px); }
#demo-bubble.show { opacity: 1; transform: none; }

/* Try it */

.try-box {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

.try-tools { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }

.seg { display: inline-flex; background: var(--surface-2); border-radius: 10px; padding: 3px; }
.seg button {
  font: 600 0.9rem var(--font);
  color: var(--sub);
  background: none;
  border: 0;
  padding: 7px 16px;
  border-radius: 8px;
  cursor: pointer;
}
.seg button.on { background: var(--surface); color: var(--text); box-shadow: 0 1px 3px rgb(0 0 0 / 12%); }

.select { display: inline-flex; align-items: center; gap: 8px; color: var(--sub); font-size: 0.9rem; }
.select select {
  font: inherit;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 6px 10px;
}

.field { position: relative; }

textarea, .mirror {
  width: 100%;
  font: 1.15rem/1.6 var(--font);
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--line);
  white-space: pre-wrap;
  overflow-wrap: break-word;
}
textarea {
  display: block;
  resize: vertical;
  min-height: 130px;
  color: var(--text);
  background: var(--bg);
  outline: none;
}
textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.mirror { position: absolute; inset: 0; visibility: hidden; pointer-events: none; overflow: hidden; }
.bubble.live { z-index: 2; pointer-events: none; }
.bubble[hidden] { display: none; }

.hint { color: var(--sub); font-size: 0.9rem; margin: 12px 0 6px; }

.samples { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; color: var(--sub); font-size: 0.9rem; }
.samples button {
  font: 0.9rem var(--mono);
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 12px;
  cursor: pointer;
}
.samples button:hover { border-color: var(--accent); }

.status { min-height: 1.4em; margin: 8px 0 0; color: var(--accent); font-size: 0.9rem; font-weight: 600; }

/* Modes */

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 28px; }
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.card-keys { display: flex; gap: 6px; margin-bottom: 18px; }
.card-keys kbd { font-size: 0.95rem; padding: 0.2em 0.7em; }
.card p { color: var(--sub); margin: 8px 0 0; font-size: 0.97rem; }

.facts { list-style: none; padding: 0; margin: 28px 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 10px 28px; }
.facts li { position: relative; padding-left: 26px; color: var(--sub); }
.facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-soft);
  box-shadow: inset 0 0 0 4px var(--accent-soft), inset 0 0 0 7px var(--accent);
}

/* Privacy */

.privacy {
  display: flex;
  gap: 28px;
  align-items: flex-start;
  margin-top: 72px;
  padding: 36px;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--accent-soft), var(--surface));
  border: 1px solid var(--line);
}
.privacy p { color: var(--sub); max-width: 720px; margin: 10px 0 0; }
.privacy-icon {
  flex: none;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, var(--accent-2), var(--accent));
}
.privacy-icon svg { width: 30px; height: 30px; fill: none; stroke: #fff; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }

/* Install */

.steps { list-style: none; counter-reset: step; padding: 0; margin: 28px 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.steps li {
  counter-increment: step;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.steps li::before {
  content: counter(step);
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  margin-bottom: 14px;
  border-radius: 10px;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-soft);
}
.steps p { color: var(--sub); margin: 8px 0 14px; font-size: 0.97rem; }
.steps p b { color: var(--text); }
.hash { font-size: 0.8rem !important; margin: 12px 0 0 !important; overflow-wrap: anywhere; }
.hash code { font-size: 0.95em; }

/* FAQ */

.faq details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  margin-top: 10px;
  padding: 0 20px;
}
.faq details:first-of-type { margin-top: 24px; }
.faq summary {
  cursor: pointer;
  padding: 16px 0;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-size: 1.3rem; line-height: 1; transition: transform 0.2s ease; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { color: var(--sub); margin: 0 0 18px; }

/* Footer */

footer {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 80px;
  padding-top: 28px;
  padding-bottom: 40px;
  border-top: 1px solid var(--line);
  color: var(--sub);
  font-size: 0.9rem;
}
footer p { margin: 0; }
footer b { color: var(--text); }

/* Small screens */

@media (max-width: 860px) {
  nav { display: none; }
  .lang { margin-left: auto; }
  .hero { grid-template-columns: 1fr; gap: 40px; padding-top: 32px; }
  .cards, .steps { grid-template-columns: 1fr; }
  .facts { grid-template-columns: 1fr; }
  .privacy { flex-direction: column; padding: 24px; }
  main, .top, footer { padding: 0 16px; }
  footer { padding-bottom: 32px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}