:root {
  --bg: #F7F8FB;
  --surface: #FFFFFF;
  --surface-2: #F1F4F9;
  --ink: #0B1B34;
  --ink-2: #3B4A63;
  --muted: #6B778C;
  --line: #E3E8F0;
  --travel: #2563EB;
  --travel-soft: #E8F0FE;
  --memo: #7C3AED;
  --memo-soft: #F1EBFE;
  --ok: #16A34A;
  --warn: #D97706;
  --danger: #DC2626;
  --radius: 20px;
  --shadow: 0 1px 2px rgba(11, 27, 52, .06), 0 12px 32px -12px rgba(11, 27, 52, .18);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #070F1E;
    --surface: #0E1A2F;
    --surface-2: #13223B;
    --ink: #EAF0FA;
    --ink-2: #C3CEDF;
    --muted: #8A98AF;
    --line: #1D2D48;
    --travel: #5B8DEF;
    --travel-soft: #13264A;
    --memo: #A78BFA;
    --memo-soft: #221A40;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 16px 40px -16px rgba(0, 0, 0, .6);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans Thai", sans-serif;
}
a { color: var(--travel); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { display: block; max-width: 100%; }

.wrap { width: min(1080px, 100% - 32px); margin-inline: auto; }

/* nav */
.nav { position: sticky; top: 0; z-index: 10; backdrop-filter: saturate(1.4) blur(12px); background: color-mix(in srgb, var(--bg) 82%, transparent); border-bottom: 1px solid var(--line); }
.nav .wrap { display: flex; align-items: center; gap: 16px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; letter-spacing: -.01em; }
.brand:hover { text-decoration: none; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.brand small { font-weight: 500; color: var(--muted); }
.nav-links { margin-left: auto; display: flex; gap: 22px; font-size: 15px; }
.nav-links a { color: var(--ink-2); }
@media (max-width: 640px) { .nav-links { display: none; } .brand small { display: none; } }

/* type */
h1, h2, h3 { line-height: 1.15; letter-spacing: -.02em; margin: 0 0 12px; }
h1 { font-size: clamp(36px, 6vw, 60px); }
h2 { font-size: clamp(28px, 4vw, 40px); }
h3 { font-size: 20px; letter-spacing: -.01em; }
.lead { font-size: clamp(17px, 2.2vw, 20px); color: var(--ink-2); max-width: 36em; }
.eyebrow { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; }
.muted { color: var(--muted); }

section { padding: 72px 0; }
@media (max-width: 640px) { section { padding: 52px 0; } }

/* hero */
.hero { padding-top: 64px; }
.hero .wrap { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }
@media (max-width: 860px) { .hero .wrap { grid-template-columns: 1fr; } }
.hero h1 span { background: linear-gradient(90deg, var(--travel), var(--memo)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.store { display: inline-flex; align-items: center; gap: 10px; padding: 12px 18px; border-radius: 14px; background: var(--ink); color: var(--bg); font-weight: 600; font-size: 15px; }
.store:hover { text-decoration: none; opacity: .9; }
.store svg { width: 22px; height: 22px; }
.store em { display: block; font-style: normal; font-size: 11px; font-weight: 500; opacity: .75; line-height: 1.1; }
.store b { display: block; line-height: 1.2; }
.soon { font-size: 14px; color: var(--muted); margin-top: 14px; }

/* phone mockup */
.phone { justify-self: center; width: min(320px, 100%); aspect-ratio: 9 / 19; border-radius: 44px; padding: 12px; background: #0B1B34; box-shadow: var(--shadow), 0 0 0 1px rgba(255,255,255,.06) inset; }
.screen { height: 100%; border-radius: 34px; background: var(--surface); padding: 26px 18px 18px; display: flex; flex-direction: column; gap: 14px; overflow: hidden; }
.screen .top { display: flex; justify-content: space-between; font-size: 12px; font-weight: 600; color: var(--muted); }
.ring-card { border: 2px solid var(--travel); border-radius: 22px; padding: 18px 14px; text-align: center; }
.ring-card small { color: var(--muted); font-size: 12px; }
.ring { position: relative; width: 150px; height: 150px; margin: 8px auto; }
.ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.ring .t { position: absolute; inset: 0; display: grid; place-items: center; font-size: 30px; font-weight: 800; color: var(--travel); font-variant-numeric: tabular-nums; }
.note { font-size: 12px; font-style: italic; color: var(--muted); }
.safe { background: var(--ok); color: #fff; border-radius: 16px; text-align: center; font-weight: 800; font-size: 18px; padding: 14px; }
.ext { display: flex; gap: 8px; justify-content: center; }
.ext span { border: 1px solid var(--line); border-radius: 12px; padding: 7px 10px; font-size: 12px; font-weight: 700; color: var(--ink-2); }

/* cards */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 860px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); }
.mode { position: relative; overflow: hidden; }
.mode .tag { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; font-size: 14px; padding: 6px 12px; border-radius: 999px; margin-bottom: 16px; }
.mode.travel .tag { background: var(--travel-soft); color: var(--travel); }
.mode.memo .tag { background: var(--memo-soft); color: var(--memo); }
.mode ul { margin: 16px 0 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.mode li { display: flex; gap: 10px; color: var(--ink-2); }
.mode li::before { content: ""; flex: 0 0 8px; height: 8px; margin-top: 9px; border-radius: 50%; background: currentColor; opacity: .35; }
.mode.travel li::before { background: var(--travel); opacity: 1; }
.mode.memo li::before { background: var(--memo); opacity: 1; }

.step { display: flex; flex-direction: column; gap: 6px; }
.step .n { width: 36px; height: 36px; border-radius: 12px; display: grid; place-items: center; font-weight: 800; background: var(--surface-2); color: var(--ink); margin-bottom: 8px; }

/* email mock */
.mail { max-width: 560px; margin: 0 auto; }
.mail .hdr { font-size: 13px; color: var(--muted); border-bottom: 1px solid var(--line); padding-bottom: 12px; margin-bottom: 16px; }
.mail .hdr b { color: var(--ink); }
.mail h3 { color: var(--danger); }
.mail table { font-size: 14px; border-collapse: collapse; margin: 8px 0 14px; }
.mail td { padding: 3px 14px 3px 0; }
.mail td:first-child { color: var(--muted); }
.btn { display: inline-block; background: var(--ink); color: var(--bg); padding: 10px 16px; border-radius: 10px; font-weight: 600; font-size: 14px; }
.btn:hover { text-decoration: none; opacity: .9; }

/* promises */
.promise { display: flex; gap: 14px; align-items: flex-start; }
.promise .ic { flex: 0 0 44px; height: 44px; border-radius: 14px; display: grid; place-items: center; background: var(--surface-2); }
.promise .ic svg { width: 22px; height: 22px; color: var(--ink); }

/* pricing */
.price { display: flex; flex-direction: column; gap: 6px; }
.price .amt { font-size: 40px; font-weight: 800; letter-spacing: -.02em; }
.price .amt small { font-size: 16px; font-weight: 600; color: var(--muted); }
.price ul { margin: 12px 0 0; padding-left: 18px; color: var(--ink-2); display: grid; gap: 6px; }
.price.featured { border: 2px solid var(--travel); }
.badge { align-self: flex-start; font-size: 12px; font-weight: 700; padding: 4px 10px; border-radius: 999px; background: var(--travel-soft); color: var(--travel); }

/* faq */
details { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 18px 20px; }
details + details { margin-top: 12px; }
summary { cursor: pointer; font-weight: 700; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; font-weight: 400; color: var(--muted); font-size: 22px; line-height: 1; }
details[open] summary::after { content: "–"; }
details p { margin: 12px 0 0; color: var(--ink-2); }

.notice { border-left: 4px solid var(--warn); background: var(--surface); border-radius: 12px; padding: 16px 20px; color: var(--ink-2); }

/* footer */
footer { border-top: 1px solid var(--line); padding: 36px 0 48px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 16px 28px; align-items: center; }
footer nav { display: flex; gap: 20px; margin-left: auto; }
@media (max-width: 640px) { footer nav { margin-left: 0; } }

/* legal + simple pages */
.doc { max-width: 760px; }
.doc h1 { font-size: clamp(32px, 5vw, 44px); }
.doc h2 { font-size: 22px; margin-top: 36px; }
.doc p, .doc li { color: var(--ink-2); }
.doc ul { padding-left: 20px; }
.doc table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 12px 0; }
.doc th, .doc td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.doc th { color: var(--ink); background: var(--surface-2); }
.simple { min-height: 70vh; display: grid; place-items: center; text-align: center; padding: 48px 16px; }
.simple .card { max-width: 460px; }
.simple img { width: 64px; height: 64px; border-radius: 16px; margin: 0 auto 16px; }

/* Words Left Behind (/words, rendered by the worker) */
.words-hero { padding-bottom: 32px; }
.words-hero h1 { font-size: clamp(32px, 5vw, 48px); }
.words { display: grid; gap: 16px; }
.word blockquote { margin: 0; font-size: 19px; line-height: 1.6; white-space: pre-wrap; overflow-wrap: anywhere; font-family: Georgia, "Noto Serif", "Noto Serif Thai", serif; }
.word footer { display: flex; flex-wrap: wrap; gap: 6px 14px; align-items: baseline; margin-top: 16px; padding: 0; border: 0; font-size: 14px; color: var(--ink-2); }
.word footer .report { margin-left: auto; color: var(--muted); font-size: 13px; }
.word.empty { text-align: center; }
.wall-teaser { border-left: 4px solid var(--memo); }