/* Pillar Tech Ltd. — plain CSS, system fonts, no build step */
:root {
  --bg: #0b1630;
  --bg-2: #101f42;
  --surface: #ffffff;
  --surface-2: #f4f7fb;
  --text: #0f172a;
  --muted: #5b6577;
  --line: #e3e8f0;
  --brand: #14b8a6;
  --brand-2: #3b82f6;
  --grad: linear-gradient(135deg, #2dd4bf 0%, #3b82f6 100%);
  --radius: 16px;
  --shadow: 0 10px 30px rgba(15, 23, 42, .08);
  --max: 1120px;
  font-size: 16px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans Thai", "Sukhumvit Set", Thonburi, Tahoma, Arial, sans-serif;
  color: var(--text);
  background: var(--surface);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--brand-2); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { width: min(var(--max), 100% - 40px); margin-inline: auto; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 22, 48, .92);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 700; letter-spacing: .2px; }
.brand:hover { text-decoration: none; }
.brand img { width: 36px; height: 36px; }
.brand small { display: block; font-weight: 500; font-size: .72rem; color: #9fb0cf; letter-spacing: .6px; text-transform: uppercase; }
.nav { display: flex; align-items: center; gap: 26px; }
.nav a { color: #d6def0; font-size: .95rem; }
.nav a:hover { color: #fff; text-decoration: none; }
.header-actions { display: flex; align-items: center; gap: 10px; }
.lang-btn, .menu-btn {
  border: 1px solid rgba(255,255,255,.22); background: transparent; color: #fff;
  border-radius: 999px; padding: 6px 14px; font: inherit; font-size: .85rem; cursor: pointer;
}
.lang-btn:hover, .menu-btn:hover { background: rgba(255,255,255,.08); }
.menu-btn { display: none; padding: 6px 12px; }

/* Hero */
.hero {
  position: relative; overflow: hidden; color: #fff;
  background:
    radial-gradient(900px 400px at 85% -10%, rgba(59,130,246,.35), transparent 60%),
    radial-gradient(700px 400px at 0% 110%, rgba(45,212,191,.25), transparent 60%),
    var(--bg);
  padding: 96px 0 104px;
}
.hero-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 48px; align-items: center; }
.eyebrow {
  display: inline-block; font-size: .8rem; font-weight: 600; letter-spacing: 1px; text-transform: uppercase;
  color: #7ee7d8; background: rgba(45,212,191,.12); border: 1px solid rgba(45,212,191,.3);
  padding: 5px 12px; border-radius: 999px; margin-bottom: 18px;
}
.hero h1 { font-size: clamp(2.1rem, 4.6vw, 3.4rem); line-height: 1.12; margin: 0 0 18px; letter-spacing: -.5px; }
.grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: 1.15rem; color: #c3cee4; max-width: 600px; margin: 0 0 30px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-art { display: flex; justify-content: center; }
.hero-art img { width: min(300px, 70vw); filter: drop-shadow(0 30px 60px rgba(59,130,246,.35)); border-radius: 48px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; border-radius: 12px; font-weight: 600; font-size: .98rem;
  border: 1px solid transparent; cursor: pointer; transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--grad); color: #04121f; box-shadow: 0 8px 24px rgba(45,212,191,.25); }
.btn-ghost { border-color: rgba(255,255,255,.3); color: #fff; }
.btn-outline { border-color: var(--line); color: var(--text); background: #fff; }
.btn-outline:hover { border-color: var(--brand); }

/* Sections */
section { padding: 88px 0; }
.section-alt { background: var(--surface-2); }
.section-head { max-width: 680px; margin-bottom: 44px; }
.section-head .kicker { color: var(--brand); font-weight: 700; font-size: .82rem; letter-spacing: 1.2px; text-transform: uppercase; }
.section-head h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); margin: 8px 0 12px; line-height: 1.2; letter-spacing: -.3px; }
.section-head p { color: var(--muted); margin: 0; font-size: 1.05rem; }

/* About */
.about-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 48px; align-items: start; }
.about-grid p { color: #334155; font-size: 1.05rem; margin-top: 0; }
.facts { display: grid; gap: 14px; }
.fact { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; }
.fact strong { display: block; font-size: .8rem; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .8px; }
.fact span { font-size: 1.05rem; font-weight: 600; }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px;
  box-shadow: var(--shadow); display: flex; flex-direction: column;
  transition: transform .2s ease, box-shadow .2s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgba(15,23,42,.12); }
.card-icon {
  width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center;
  font-size: 1.5rem; margin-bottom: 18px; background: var(--surface-2);
}
.card h3 { margin: 0 0 4px; font-size: 1.35rem; }
.card .tagline { color: var(--brand); font-weight: 600; margin: 0 0 16px; }
.card p.desc { color: var(--muted); margin: 0 0 16px; font-size: .97rem; }
.card ul { list-style: none; padding: 0; margin: 0 0 24px; display: grid; gap: 10px; }
.card li { position: relative; padding-left: 28px; font-size: .96rem; color: #334155; }
.card li::before {
  content: ""; position: absolute; left: 0; top: .35em; width: 18px; height: 18px; border-radius: 50%;
  background: var(--grad);
  -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'><path d='M10 0a10 10 0 1 0 0 20 10 10 0 0 0 0-20Zm-1.2 14.2-4-4 1.4-1.4 2.6 2.6 5-5 1.4 1.4-6.4 6.4Z'/></svg>") center/contain no-repeat;
          mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'><path d='M10 0a10 10 0 1 0 0 20 10 10 0 0 0 0-20Zm-1.2 14.2-4-4 1.4-1.4 2.6 2.6 5-5 1.4 1.4-6.4 6.4Z'/></svg>") center/contain no-repeat;
}
.card .btn { margin-top: auto; align-self: flex-start; }
.badge { display: inline-block; font-size: .72rem; font-weight: 600; color: var(--muted); background: var(--surface-2); border: 1px solid var(--line); border-radius: 999px; padding: 2px 10px; margin-left: 6px; vertical-align: middle; }

/* Services */
.services { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service { padding: 28px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); }
.service h3 { margin: 14px 0 8px; font-size: 1.15rem; }
.service p { margin: 0; color: var(--muted); font-size: .97rem; }
.service .num { font-weight: 800; font-size: .9rem; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* Contact */
.contact-box {
  display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: center;
  background: var(--bg); color: #fff; border-radius: 24px; padding: 48px;
  background-image: radial-gradient(600px 300px at 100% 0%, rgba(59,130,246,.35), transparent 60%);
}
.contact-box h2 { margin: 0 0 10px; font-size: clamp(1.6rem, 3vw, 2.1rem); }
.contact-box p { color: #c3cee4; margin: 0; }
.contact-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.contact-list li { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1); border-radius: 12px; padding: 14px 18px; }
.contact-list strong { display: block; font-size: .78rem; color: #9fb0cf; text-transform: uppercase; letter-spacing: .8px; }
.contact-list a { color: #7ee7d8; }
.todo { display: inline-block; font-size: .7rem; font-weight: 700; color: #92400e; background: #fef3c7; border-radius: 6px; padding: 1px 7px; margin-left: 6px; vertical-align: middle; letter-spacing: .3px; }

/* Footer */
.site-footer { background: var(--bg); color: #9fb0cf; padding: 36px 0; font-size: .92rem; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.site-footer a { color: #d6def0; }
.footer-links { display: flex; gap: 20px; }

/* Legal page */
.legal { padding: 64px 0 88px; }
.legal .container { max-width: 820px; }
.legal h1 { font-size: clamp(1.8rem, 3.4vw, 2.4rem); margin: 0 0 6px; }
.legal h2 { font-size: 1.25rem; margin: 36px 0 10px; }
.legal p, .legal li { color: #334155; }
.legal .meta { color: var(--muted); margin-bottom: 28px; }
.notice { background: #fffbeb; border: 1px solid #fde68a; border-radius: 12px; padding: 14px 18px; color: #78350f; }

/* Responsive */
@media (max-width: 960px) {
  .cards, .services { grid-template-columns: 1fr 1fr; }
  .hero-grid, .about-grid, .contact-box { grid-template-columns: 1fr; }
  .hero-art { display: none; }
}
@media (max-width: 720px) {
  section { padding: 64px 0; }
  .hero { padding: 72px 0 80px; }
  .cards, .services { grid-template-columns: 1fr; }
  .menu-btn { display: inline-block; }
  .nav {
    display: none; position: absolute; top: 68px; left: 0; right: 0; flex-direction: column; gap: 0;
    background: var(--bg); border-bottom: 1px solid rgba(255,255,255,.08); padding: 8px 20px 16px;
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 0; width: 100%; border-bottom: 1px solid rgba(255,255,255,.06); }
  .contact-box { padding: 32px 24px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .card, .btn { transition: none; }
}