/* Quantum DynamicsX — EN Website v1.1 (static, self-hosted)
   Focus: theory-driven calculation design + simulation verification (FEA/CFD/EMAG) + test correlation.
   No external fonts, no external JS. CSP-friendly. */

:root{
  --bg: #0b1220;
  --panel: #0f1b33;
  --card: #111f3b;
  --text: #e6eefc;
  --muted: rgba(230,238,252,.75);
  --muted2: rgba(230,238,252,.6);
  --line: rgba(230,238,252,.14);
  --accent: #7dd3fc;
  --accent2: #a78bfa;
  --radius: 18px;
  --shadow: 0 12px 34px rgba(0,0,0,.35);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1000px 700px at 70% 10%, rgba(167,139,250,.22), transparent 60%),
              radial-gradient(900px 650px at 20% 0%, rgba(125,211,252,.18), transparent 55%),
              var(--bg);
  color: var(--text);
  line-height: 1.55;
}

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

.container{
  width: min(1140px, calc(100% - 40px));
  margin: 0 auto;
}

.skip-link{
  position:absolute; left:-9999px; top:auto; width:1px; height:1px; overflow:hidden;
}
.skip-link:focus{
  left:16px; top:12px; width:auto; height:auto; padding:10px 12px;
  background:#fff; color:#000; border-radius:10px; z-index:9999;
}

header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11,18,32,.68);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding: 12px 0;
  gap: 14px;
}

.brand{
  display:flex; align-items:center; gap:10px;
  font-weight: 700; letter-spacing:.2px;
}

.brandmark{
  border-radius: 10px;
  background: rgba(255,255,255,0.06);
  padding: 6px;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.08);
}

.brand svg{width:34px; height:34px}
.brand span{white-space:nowrap}

.navlinks{
  display:flex; gap: 18px;
  flex-wrap: wrap;
  justify-content:flex-end;
}
.navlinks a{
  color: rgba(230,238,252,.92);
  font-weight: 600;
  font-size: 14px;
  padding: 8px 10px;
  border-radius: 10px;
}
.navlinks a:hover{
  background: rgba(230,238,252,.07);
  text-decoration:none;
}

.hero{
  padding: 60px 0 26px;
}
.hero-grid{
  display:grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 26px;
  align-items:center;
}
@media (max-width: 960px){
  .hero-grid{grid-template-columns:1fr}
}

.kicker{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.04);
  color: rgba(230,238,252,.88);
  font-weight: 600;
  font-size: 13px;
}
.kicker b{color:var(--accent)}

h1{
  margin: 14px 0 10px;
  font-size: clamp(30px, 3.7vw, 46px);
  line-height:1.15;
  letter-spacing: -0.4px;
}
.lead{
  color: var(--muted);
  font-size: 16px;
  margin: 0 0 18px;
  max-width: 65ch;
}

.badges{display:flex; gap:8px; flex-wrap:wrap; margin-top:10px}
.badge{
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 12px;
  color: rgba(230,238,252,.86);
  background: rgba(255,255,255,.04);
}

.cta-row{
  display:flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 16px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding: 11px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.05);
  color: rgba(230,238,252,.95);
  font-weight: 700;
  font-size: 14px;
  box-shadow: none;
}
.btn:hover{
  background: rgba(255,255,255,.09);
  text-decoration:none;
}
.btn.primary{
  background: linear-gradient(135deg, rgba(125,211,252,.2), rgba(167,139,250,.18));
  border-color: rgba(125,211,252,.28);
}
.btn.primary:hover{border-color: rgba(125,211,252,.45);}

.hero-card{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
  box-shadow: var(--shadow);
  overflow:hidden;
}
.hero-card .pad{padding: 14px 14px 10px}
.hero-card h3{margin:0 0 6px; font-size: 14px; color: rgba(230,238,252,.92)}
.hero-card p{margin:0; color:var(--muted); font-size: 13.5px}
.hero-visual{
  padding: 14px 14px 0;
  display:flex;
  align-items:center;
  justify-content:center;
}

/* Hero concept diagram (SVG) */
.hero-diagram{
  display:block !important;
  width:100%;
  max-width:560px;
  height:auto;
  margin: 0 auto 14px;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,.35);
}
@media (max-width: 980px){
  .hero-diagram{ max-width: 680px; }
}

.hero-visual img:not(.hero-diagram){
  object-fit: contain;
  width: 100%;
  height: auto;
  max-height: 520px;
  display:block;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(0,0,0,.10);
}
.hero-visual .hero-diagram{
  width:100%;
  max-width:680px;
  height:auto;
  display:block;
  border-radius:12px;
  border:1px solid rgba(255,255,255,0.12);
  background:rgba(10,16,26,0.35);
}

.section{padding: 38px 0;}
.section h2{
  font-size: 22px;
  margin: 0 0 6px;
  letter-spacing: -0.2px;
}
.section .sub{
  margin: 0 0 18px;
  color: var(--muted);
  max-width: 90ch;
}
.grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
@media (max-width: 980px){.grid{grid-template-columns: repeat(2, 1fr);}}
@media (max-width: 640px){.grid{grid-template-columns: 1fr;}}

.card{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(17,31,59,.68);
  box-shadow: 0 10px 24px rgba(0,0,0,.25);
  padding: 14px;
  min-height: 120px;
}
.card .title{
  display:flex; align-items:center; gap:10px;
  font-weight: 800;
  margin: 0 0 6px;
}
.card .title svg{width:18px; height:18px}
.card p{margin:0; color: var(--muted); font-size: 13.8px}

.split{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
@media (max-width: 820px){.split{grid-template-columns:1fr}}

.panel{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(15,27,51,.68);
  padding: 14px;
}
.panel h3{margin:0 0 8px; font-size: 16px}
.panel ul{margin:0; padding-left: 18px; color: var(--muted)}
.panel li{margin: 6px 0}

.timeline{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
@media (max-width: 980px){.timeline{grid-template-columns: repeat(2, 1fr);}}
@media (max-width: 560px){.timeline{grid-template-columns: 1fr;}}
.step{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(17,31,59,.58);
  padding: 14px;
}
.step .n{
  width: 30px; height: 30px;
  border-radius: 12px;
  display:inline-flex; align-items:center; justify-content:center;
  font-weight: 900;
  background: rgba(125,211,252,.15);
  border: 1px solid rgba(125,211,252,.25);
  margin-bottom: 10px;
}
.step h4{margin:0 0 6px; font-size: 15px}
.step p{margin:0; color: var(--muted); font-size: 13.8px}

.callout{
  border: 1px solid rgba(125,211,252,.25);
  background: rgba(125,211,252,.08);
  border-radius: var(--radius);
  padding: 14px;
  color: rgba(230,238,252,.92);
}
.callout b{color: var(--accent)}

.footer{
  border-top: 1px solid var(--line);
  padding: 20px 0 28px;
  color: var(--muted2);
  font-size: 13px;
}
.footer-links{
  display:flex; gap: 14px; flex-wrap:wrap;
  margin-top: 10px;
}
.footer-links a{color: rgba(230,238,252,.86)}
.footer-links a:hover{color: var(--accent); text-decoration:none}

hr.sep{
  border:0;
  border-top: 1px solid var(--line);
  margin: 18px 0;
}

/* Legal pages */
.legal h1{margin-top: 22px}
.legal p{color: var(--muted); max-width: 90ch}
.legal ul{color: var(--muted); max-width: 90ch}
.codebox{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(17,31,59,.5);
  padding: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 12.5px;
  overflow:auto;
  color: rgba(230,238,252,.88);
}


/* Text-only mode (requested): remove imagery */
img, svg { display: none !important; }

.brand-name{font-weight:700;letter-spacing:0.2px;}
/* --- Mobile header: keep top menu in one horizontal row (scrollable) --- */
@media (max-width: 680px){
  /* รองรับชื่อคลาสหลายแบบ เผื่อโค้ดต่างกัน */
  .nav{ gap:10px; align-items:center; }

  .brand{ flex:0 0 auto; font-size:15px; }

  .navlinks, .nav-links, .navLinks{
    display:flex !important;
    flex-direction: row !important;
    flex-wrap: nowrap !important;      /* ห้ามแตกบรรทัด */
    overflow-x: auto !important;       /* เลื่อนซ้าย-ขวา */
    overflow-y: hidden !important;
    -webkit-overflow-scrolling: touch;
    justify-content: flex-start !important;
    align-items: center !important;
    gap: 10px;
    padding-bottom: 2px;
    scrollbar-width: none;             /* Firefox ซ่อน scrollbar */
  }
  .navlinks::-webkit-scrollbar,
  .nav-links::-webkit-scrollbar,
  .navLinks::-webkit-scrollbar{ display:none; } /* Chrome/Android ซ่อน scrollbar */

  .navlinks a, .nav-links a, .navLinks a{
    flex: 0 0 auto;
    white-space: nowrap !important;    /* ห้ามตัดคำ */
    font-size: 13px;
    padding: 6px 8px;
  }
}