:root{
  --bg: #16171c;
  --surface: #1e2029;
  --surface-2: #262835;
  --line: #34374487;
  --text: #ecebe4;
  --muted: #91949f;
  --linear: #e6553c;
  --tactile: #d3a24c;
  --clicky: #4c8cff;
  --radius: 14px;
}
*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg);
  color:var(--text);
  font-family:'IBM Plex Sans Thai','IBM Plex Mono',sans-serif;
  line-height:1.6;
}
h1,h2,h3,.display{
  font-family:'Chakra Petch','IBM Plex Sans Thai',sans-serif;
  letter-spacing:.01em;
}
.mono{font-family:'IBM Plex Mono',monospace;}
a{color:inherit; text-decoration:none;}
img{max-width:100%; display:block;}
.wrap{max-width:1140px; margin:0 auto; padding:0 24px;}
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important; transition-duration:.001ms !important;}
}

/* ---------- keycap texture background ---------- */
.key-grid{
  position:absolute; inset:0; overflow:hidden; pointer-events:none;
  opacity:.5;
}
.key-grid .row{display:flex; gap:8px; margin-bottom:8px; transform:skewX(-6deg);}
.key-grid .k{
  width:36px; height:36px; border-radius:6px;
  border:1px solid var(--line);
  background:linear-gradient(180deg,#20222c,#1a1b22);
  flex:none;
}

/* ---------- header ---------- */
header{
  position:sticky; top:0; z-index:50;
  background:rgba(22,23,28,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex; align-items:center; justify-content:space-between; padding:16px 24px;}
.brand{display:flex; align-items:center; gap:10px; font-weight:700; font-size:1.25rem;}
.brand .dot{width:10px; height:10px; border-radius:3px; background:var(--linear); box-shadow:0 0 0 3px #e6553c33;}
.navlinks{display:flex; gap:28px; font-size:.95rem; color:var(--muted);}
.navlinks a:hover{color:var(--text);}
.navlinks a.active{color:var(--text); border-bottom:2px solid var(--linear); padding-bottom:4px;}
.cta-small{
  background:var(--linear); color:#fff; padding:9px 18px; border-radius:999px;
  font-size:.9rem; font-weight:600; white-space:nowrap;
}
.navlinks, .cta-small{display:flex;}
@media(max-width:760px){ .navlinks{display:none;} }

/* ---------- page hero (small, for sub-pages) ---------- */
.page-hero{position:relative; padding:64px 24px 56px; overflow:hidden; border-bottom:1px solid var(--line); text-align:center;}
.page-hero-inner{position:relative; max-width:720px; margin:0 auto;}
.eyebrow{
  display:inline-flex; align-items:center; gap:8px; font-family:'IBM Plex Mono',monospace;
  font-size:.78rem; letter-spacing:.12em; color:var(--tactile); text-transform:uppercase;
  border:1px solid var(--line); padding:6px 14px; border-radius:999px; margin-bottom:22px;
}
.page-hero h1{font-size:clamp(2rem, 4.6vw, 3rem); font-weight:700; margin-bottom:14px;}
.page-hero p{color:var(--muted); font-size:1.02rem;}

/* ---------- full hero (home) ---------- */
.hero{position:relative; padding:96px 24px 72px; overflow:hidden; border-bottom:1px solid var(--line);}
.hero-inner{position:relative; max-width:1140px; margin:0 auto; text-align:center;}
.hero h1{font-size:clamp(2.2rem, 5.5vw, 4rem); font-weight:700; line-height:1.15; margin-bottom:20px;}
.hero h1 span{color:var(--linear);}
.hero p{color:var(--muted); font-size:1.08rem; max-width:560px; margin:0 auto 36px;}
.hero-ctas{display:flex; gap:14px; justify-content:center; flex-wrap:wrap;}
.btn{padding:14px 28px; border-radius:10px; font-weight:600; font-size:.98rem; cursor:pointer; border:none;}
.btn-primary{background:var(--linear); color:#fff;}
.btn-ghost{background:transparent; color:var(--text); border:1px solid var(--line);}
.btn-primary:hover{background:#d4442e;}
.btn-ghost:hover{border-color:#565a6b;}

.legend{display:flex; gap:22px; justify-content:center; margin-top:48px; flex-wrap:wrap; font-family:'IBM Plex Mono',monospace; font-size:.82rem; color:var(--muted);}
.legend .item{display:flex; align-items:center; gap:8px;}
.swatch{width:12px; height:12px; border-radius:50%;}

/* ---------- section shell ---------- */
section{padding:80px 24px;}
.section-head{text-align:center; max-width:620px; margin:0 auto 48px;}
.section-head .eyebrow{margin-bottom:14px;}
.section-head h2{font-size:clamp(1.7rem,3.4vw,2.4rem); margin-bottom:12px;}
.section-head p{color:var(--muted);}

/* ---------- teaser cards (home) ---------- */
.teaser-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:20px; max-width:1140px; margin:0 auto;}
.teaser-card{
  background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); padding:28px;
  transition:transform .15s ease, border-color .15s ease;
}
.teaser-card:hover{transform:translateY(-4px); border-color:#4a4e60;}
.teaser-card .ic{font-size:1.6rem; margin-bottom:14px;}
.teaser-card h3{font-size:1.15rem; margin-bottom:8px;}
.teaser-card p{color:var(--muted); font-size:.9rem;}
.teaser-card a{color:var(--linear); font-size:.85rem; font-weight:600; display:inline-block; margin-top:14px;}
@media(max-width:760px){ .teaser-grid{grid-template-columns:1fr;} }

/* ---------- about ---------- */
.about{background:var(--surface);}
.about-grid{display:grid; grid-template-columns:1fr 1fr; gap:48px; align-items:center; max-width:1140px; margin:0 auto;}
.about-visual{
  aspect-ratio:4/3; border-radius:var(--radius); background:var(--surface-2);
  border:1px solid var(--line); position:relative; overflow:hidden;
  display:flex; align-items:center; justify-content:center;
}
.kb-illustration{width:82%;}
.kb-illustration .row{display:flex; gap:6px; margin-bottom:6px;}
.kb-illustration .k{height:22px; border-radius:4px; background:#2c2f3c; border:1px solid #3a3d4c; flex:1;}
.kb-illustration .k.accent{background:var(--linear); border-color:#e6553c;}
.about-copy h3{font-size:1.5rem; margin-bottom:16px;}
.about-copy p{color:var(--muted); margin-bottom:16px;}
.feature-list{list-style:none; margin-top:24px;}
.feature-list li{display:flex; gap:12px; padding:12px 0; border-top:1px solid var(--line); font-size:.95rem;}
.feature-list li:first-child{border-top:none;}
.feature-list b{font-weight:600;}
.feature-list .num{font-family:'IBM Plex Mono',monospace; color:var(--linear); flex:none; width:26px;}
@media(max-width:760px){ .about-grid{grid-template-columns:1fr;} }

.stats-row{display:grid; grid-template-columns:repeat(4,1fr); gap:20px; max-width:1140px; margin:64px auto 0; text-align:center;}
.stat b{display:block; font-family:'IBM Plex Mono',monospace; font-size:1.8rem; color:var(--linear);}
.stat span{color:var(--muted); font-size:.85rem;}
@media(max-width:700px){ .stats-row{grid-template-columns:repeat(2,1fr); row-gap:32px;} }

/* ---------- products ---------- */
.products-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:20px; max-width:1140px; margin:0 auto;}
@media(max-width:900px){ .products-grid{grid-template-columns:repeat(2,1fr);} }
@media(max-width:520px){ .products-grid{grid-template-columns:1fr;} }

.keycap{
  background:var(--surface); border:1px solid var(--line); border-radius:var(--radius);
  padding:18px; display:flex; flex-direction:column; gap:14px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.03);
  transition:transform .15s ease, border-color .15s ease;
}
.keycap:hover{transform:translateY(-4px); border-color:#4a4e60;}
.keycap-top{
  aspect-ratio:4/3; border-radius:10px; background:linear-gradient(160deg,var(--surface-2),#191a22);
  border:1px solid var(--line); display:flex; align-items:center; justify-content:center; position:relative;
}
.keycap-top .mini-keys{display:grid; grid-template-columns:repeat(5,1fr); gap:4px; width:74%;}
.keycap-top .mini-keys div{aspect-ratio:1; border-radius:3px; background:#2c2f3c; border:1px solid #393c4a;}
.switch-chip{
  position:absolute; top:10px; right:10px; display:flex; align-items:center; gap:6px;
  font-family:'IBM Plex Mono',monospace; font-size:.68rem; color:var(--muted);
  background:#16171ccc; border:1px solid var(--line); padding:4px 8px; border-radius:999px;
}
.switch-chip .swatch{width:8px; height:8px;}
.keycap-name{font-weight:600; font-size:1rem;}
.keycap-desc{font-size:.82rem; color:var(--muted);}
.keycap-bottom{display:flex; align-items:center; justify-content:space-between; margin-top:auto; padding-top:6px;}
.price{font-family:'IBM Plex Mono',monospace; font-weight:600; color:var(--text);}
.price small{color:var(--muted); font-weight:400; font-size:.72rem;}
.add-btn{
  width:34px; height:34px; border-radius:8px; border:1px solid var(--line); background:transparent;
  color:var(--text); font-size:1.1rem; cursor:pointer; line-height:1;
}
.add-btn:hover{background:var(--linear); border-color:var(--linear); color:#fff;}

.filter-row{display:flex; gap:10px; justify-content:center; flex-wrap:wrap; margin-bottom:40px;}
.filter-chip{
  border:1px solid var(--line); background:var(--surface); color:var(--muted);
  padding:9px 18px; border-radius:999px; font-size:.85rem; cursor:pointer; font-family:'IBM Plex Mono',monospace;
}
.filter-chip.active{background:var(--linear); border-color:var(--linear); color:#fff;}

/* ---------- contact ---------- */
.contact{background:var(--surface);}
.contact-grid{display:grid; grid-template-columns:1fr 1fr; gap:48px; max-width:1140px; margin:0 auto;}
.contact-card{background:var(--surface-2); border:1px solid var(--line); border-radius:var(--radius); padding:32px;}
.contact-card h3{margin-bottom:6px; font-size:1.3rem;}
.contact-card .sub{color:var(--muted); font-size:.9rem; margin-bottom:26px;}
.info-row{display:flex; gap:14px; padding:14px 0; border-top:1px solid var(--line); align-items:flex-start;}
.info-row:first-of-type{border-top:none;}
.info-row .ic{
  width:34px; height:34px; border-radius:8px; background:var(--surface); border:1px solid var(--line);
  display:flex; align-items:center; justify-content:center; flex:none; font-size:.95rem;
}
.info-row .label{font-size:.75rem; color:var(--muted); text-transform:uppercase; letter-spacing:.08em; font-family:'IBM Plex Mono',monospace;}
.info-row .val{font-size:.96rem; margin-top:2px;}
.social-row{display:flex; gap:10px; margin-top:24px;}
.social-row a{
  width:40px; height:40px; border-radius:10px; border:1px solid var(--line); background:var(--surface);
  display:flex; align-items:center; justify-content:center; font-size:1rem;
}
.social-row a:hover{border-color:var(--linear); color:var(--linear);}
.map-box{
  border-radius:var(--radius); border:1px solid var(--line); background:
    repeating-linear-gradient(0deg, #1c1e27 0 2px, transparent 2px 26px),
    repeating-linear-gradient(90deg, #1c1e27 0 2px, transparent 2px 26px),
    var(--surface-2);
  min-height:340px; display:flex; align-items:center; justify-content:center; position:relative;
}
.map-box .pin{font-size:1.8rem;}
.map-box .pin-label{position:absolute; bottom:20px; left:20px; right:20px; background:#16171ccc; border:1px solid var(--line); padding:12px 14px; border-radius:10px; font-size:.85rem; color:var(--muted);}

.contact-form{display:flex; flex-direction:column; gap:14px;}
.contact-form label{font-size:.8rem; color:var(--muted); font-family:'IBM Plex Mono',monospace; margin-bottom:4px; display:block;}
.contact-form input, .contact-form textarea{
  width:100%; background:var(--surface); border:1px solid var(--line); border-radius:8px; padding:12px 14px;
  color:var(--text); font-family:'IBM Plex Sans Thai',sans-serif; font-size:.92rem;
}
.contact-form input:focus, .contact-form textarea:focus{outline:2px solid var(--linear); outline-offset:1px; border-color:var(--linear);}
.contact-form textarea{resize:vertical; min-height:100px;}

/* ---------- footer ---------- */
footer{padding:36px 24px; text-align:center; color:var(--muted); font-size:.85rem; border-top:1px solid var(--line);}
footer .brand{justify-content:center; margin-bottom:10px; font-size:1.05rem;}