:root {
  --navy: #0e2236; --navy-2: #163350; --teal: #1fb5a6; --teal-dark: #0b6b62;
  --ink: #17222d; --muted: #556372; --line: #e1e7ed; --bg: #f4f7fa; --card: #fff;
  --fault: #b42318; --fault-bg: #fef3f2; --warn: #b54708; --warn-bg: #fffaeb; --ok: #067647; --ok-bg: #ecfdf3;
  --radius: 14px; --shadow: 0 1px 2px rgba(14,34,54,.06), 0 8px 24px rgba(14,34,54,.08);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--bg); line-height: 1.65; font-size: 17px;
       font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans Thai", "Helvetica Neue", Arial, sans-serif;
       -webkit-font-smoothing: antialiased; }
a { color: var(--teal-dark); text-underline-offset: 3px; }
a:hover { color: var(--navy); }
:focus-visible { outline: 3px solid var(--teal); outline-offset: 2px; border-radius: 4px; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 24px; }

/* Header and hero */
header { color: #fff; background:
  radial-gradient(900px 400px at 85% -10%, rgba(31,181,166,.28), transparent 60%),
  linear-gradient(180deg, var(--navy) 0%, var(--navy-2) 100%); }
.top { display: flex; align-items: center; gap: 12px; padding: 20px 0; }
.top img { width: 40px; height: 40px; border-radius: 10px; background: #fff; }
.top .name { font-weight: 700; font-size: 18px; letter-spacing: .2px; flex: 1; }
.top nav a { color: #d6e2ee; text-decoration: none; font-size: 15px; margin-left: 20px; }
.top nav a:hover { color: #fff; }
.lang[hidden] { display: none; }
.lang button { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.4); border-radius: 8px;
               padding: 4px 10px; cursor: pointer; font: inherit; font-size: 14px; }
.lang button[aria-pressed="true"] { background: var(--teal); border-color: var(--teal); color: var(--navy); font-weight: 700; }
.hero { padding: 56px 0 120px; max-width: 700px; }
.eyebrow { display: inline-block; font-size: 13px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
           color: #8fe3da; margin-bottom: 14px; }
.hero h1 { margin: 0 0 16px; font-size: clamp(32px, 6vw, 50px); line-height: 1.12; letter-spacing: -.02em; font-weight: 750; }
.hero p { margin: 0; font-size: 19px; color: #c9d8e6; max-width: 36em; }

/* Checker card overlaps hero */
.checker { margin-top: -84px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
           box-shadow: var(--shadow); padding: 28px; }
.checker h2 { margin: 0 0 14px; font-size: 22px; }
.checkform { display: flex; gap: 10px; }
.checkform input { flex: 1; min-width: 0; font: inherit; padding: 14px 16px; border: 1.5px solid #c3ced9; border-radius: 10px;
                   background: #fff; }
.checkform input:focus { border-color: var(--teal); outline: 3px solid rgba(31,181,166,.25); }
.checkform button { font: inherit; font-weight: 700; padding: 14px 26px; border: 0; border-radius: 10px;
                    background: var(--teal); color: var(--navy); cursor: pointer; transition: background .15s, transform .05s; }
.checkform button:hover { background: #2ccbbb; }
.checkform button:active { transform: translateY(1px); }
.checkform button:disabled { opacity: .6; cursor: wait; }
.note { color: var(--muted); font-size: 14.5px; margin: 8px 0; }
#check-status { min-height: 1.4em; color: var(--muted); margin: 8px 0 0; }
#check-status.err { color: var(--fault); }

/* Results */
.res { margin-top: 18px; border-top: 1px solid var(--line); padding-top: 6px; }
.summary { font-size: 21px; font-weight: 700; margin: 16px 0 4px; }
.res h3 { font-size: 15px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 26px 0 10px; }
.res h4 { font-size: 17px; margin: 0 0 4px; }
.res p { margin: 4px 0; }
.res > div:not(.summary):not(.offer):not(.fault) { background: var(--warn-bg); border: 1px solid #fedf89; border-left: 4px solid #f79009;
                                      border-radius: 10px; padding: 12px 16px; margin: 10px 0; }
.res > .fault { background: var(--fault-bg); border-color: #fecdca; border-left-color: var(--fault); }
.res .fault h4 { color: var(--fault); }
.res code { display: block; background: #eef2f6; padding: 10px 12px; border-radius: 8px; white-space: pre-wrap;
            overflow-wrap: anywhere; font-size: 13.5px; margin: 4px 0 12px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.offer { background: #f0fbf9; border: 1px solid #b6ebe4; border-left: 4px solid var(--teal); border-radius: 10px;
         padding: 16px 18px; margin: 22px 0 6px; }
.offer p { margin: 4px 0 8px; }

/* Trust strip */
.trust { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 12px; margin: 28px 0 0; padding: 0; list-style: none; }
.trust li { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; color: var(--muted); padding: 12px 14px;
            background: var(--card); border: 1px solid var(--line); border-radius: 12px; }
.trust svg { flex: none; width: 20px; height: 20px; margin-top: 3px; color: var(--teal-dark); }
.trust strong { display: block; color: var(--ink); font-size: 15px; }

/* Sections */
section { padding: 56px 0 0; }
section > h2, .sec-head { font-size: 28px; letter-spacing: -.01em; margin: 0 0 8px; line-height: 1.25; }
.lead { color: var(--muted); margin: 0 0 24px; max-width: 42em; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid.two { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 560px) { .grid.two { grid-template-columns: 1fr; } }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: 0 1px 2px rgba(14,34,54,.04); }
.card h3 { margin: 0 0 6px; font-size: 19px; }
.card p { margin: 0 0 8px; color: var(--muted); }
.card .badge { width: 40px; height: 40px; border-radius: 10px; background: #e3f6f3; color: var(--teal-dark);
               display: grid; place-items: center; font-weight: 800; font-size: 14px; margin-bottom: 12px; }
.card.feature { grid-column: 1 / -1; border-left: 4px solid var(--teal); }
.tag { display: inline-block; margin-top: 6px; font-size: 13px; font-weight: 600; background: #e3f6f3; color: var(--teal-dark);
       border-radius: 999px; padding: 3px 12px; }
.btn { display: inline-block; margin-top: 10px; padding: 10px 18px; border-radius: 10px; background: var(--navy);
       color: #fff; text-decoration: none; font-weight: 600; }
.btn:hover { background: var(--navy-2); color: #fff; }
.about { display: grid; grid-template-columns: 1fr; gap: 12px; max-width: 46em; }
.about p { margin: 0; }

/* Footer */
footer { margin-top: 72px; background: var(--navy); color: #b8c8d8; padding: 36px 0 44px; font-size: 14.5px; }
footer a { color: #8fe3da; }
footer .brand { color: #fff; font-weight: 700; font-size: 17px; margin-bottom: 6px; }
footer div + div { margin-top: 6px; }

html[data-lang="en"] [lang-th] { display: none !important; }
html[data-lang="th"] [lang-en] { display: none !important; }

@media (max-width: 560px) {
  body { font-size: 16px; }
  .hero { padding: 36px 0 104px; }
  .checker { padding: 20px; }
  .checkform { flex-direction: column; }
  .top nav { display: none; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }