:root {
  --bg-deep:    #080c0f;
  --bg-base:    #0d1317;
  --bg-panel:   #111820;
  --bg-raised:  #16212b;
  --accent:     #f5c400;
  --accent-dim: #b38f00;
  --accent-glow:#f5c40033;
  --gold:       #f5c400;
  --text-hi:    #e8eef2;
  --text-mid:   #8fa8b8;
  --text-lo:    #3d5468;
  --border:     #1e3040;
  --border-hi:  #2a4a60;
  --red:        #e05050;
  --font-display: 'Bebas Neue', sans-serif;
  --font-ui:      'Rajdhani', sans-serif;
  --font-thai:    'Prompt', sans-serif;
  --font-mono:    'Share Tech Mono', monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-deep);
  color: var(--text-hi);
  font-family: var(--font-ui);
  overflow-x: hidden;
  cursor: crosshair;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.5;
}
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--accent-dim); }

/* ── NAV ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  height: 64px;
  background: linear-gradient(180deg, rgba(8,12,15,0.98) 0%, rgba(8,12,15,0.85) 100%);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}
.nav-logo { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.logo-mark { width: 32px; height: 32px; flex-shrink: 0; }
.logo-mark svg { width: 100%; height: 100%; }
.logo-text { font-family: var(--font-display); font-size: 22px; letter-spacing: 4px; color: var(--text-hi); line-height: 1; }
.logo-sub { font-family: var(--font-mono); font-size: 9px; color: var(--accent); letter-spacing: 3px; margin-top: 2px; }
.nav-links { display: flex; align-items: center; gap: 32px; list-style: none; }
.nav-links a {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-mid);
  text-decoration: none;
  transition: color 0.2s;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width 0.3s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--accent); }
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }
.nav-lang { display: flex; align-items: center; gap: 2px; }
.lang-btn {
  padding: 4px 10px;
  border: 1px solid var(--border-hi);
  background: transparent;
  color: var(--text-mid);
  cursor: pointer;
  letter-spacing: 1px;
  transition: all 0.2s;
  font-family: var(--font-mono);
  font-size: 11px;
}
.lang-btn.active { background: var(--accent); color: var(--bg-deep); border-color: var(--accent); }
.lang-btn:hover:not(.active) { border-color: var(--accent); color: var(--accent); }

/* ── BUTTONS ── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  background: var(--accent);
  color: var(--bg-deep);
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  text-decoration: none;
  border: none;
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: all 0.2s;
}
.btn-primary:hover { background: var(--text-hi); box-shadow: 0 0 30px var(--accent-glow); }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 32px;
  background: transparent;
  color: var(--accent);
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid var(--accent);
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: all 0.2s;
}
.btn-secondary:hover { background: rgba(245,196,0,0.08); box-shadow: 0 0 20px var(--accent-glow); }

/* ── SECTION SHARED ── */
section { padding: 100px 80px; max-width: 1400px; margin: 0 auto; }
.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 56px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.section-header::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0;
  width: 120px; height: 1px;
  background: var(--accent);
}
.section-num { font-family: var(--font-mono); font-size: 11px; color: var(--accent-dim); letter-spacing: 3px; margin-bottom: 8px; }
.section-title { font-family: var(--font-display); font-size: clamp(36px, 4vw, 56px); letter-spacing: 3px; line-height: 1; color: var(--text-hi); }
.section-title-th { font-family: var(--font-thai); font-size: 16px; font-weight: 300; color: var(--text-mid); margin-top: 6px; letter-spacing: 1px; }
.section-desc { font-size: 14px; color: var(--text-mid); max-width: 320px; text-align: right; line-height: 1.7; }

/* ── PAGE HERO ── */
.page-hero {
  padding-top: 64px;
  min-height: 240px;
  display: flex;
  align-items: flex-end;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-panel) 100%);
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(245,196,0,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245,196,0,0.03) 1px, transparent 1px);
  background-size: 48px 48px;
}
.page-hero-inner { padding: 48px 80px; position: relative; }

/* ── SERVICES DETAIL ── */
.services-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; }
.service-detail-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  padding: 48px 40px;
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
  transition: border-color 0.3s;
}
.service-detail-card:hover { border-color: var(--accent-dim); }
.service-detail-card::after {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 20px; height: 20px;
  border-bottom: 1px solid var(--border);
  border-left: 1px solid var(--border);
  background: var(--bg-deep);
}
.service-num { font-family: var(--font-mono); font-size: 10px; color: var(--text-lo); letter-spacing: 2px; margin-bottom: 16px; }
.service-icon { font-size: 32px; color: var(--accent); margin-bottom: 16px; line-height: 1; }
.service-title { font-family: var(--font-display); font-size: 32px; letter-spacing: 3px; color: var(--text-hi); margin-bottom: 6px; }
.service-title-th { font-family: var(--font-thai); font-size: 14px; color: var(--accent-dim); margin-bottom: 20px; }
.service-desc { font-size: 14px; color: var(--text-mid); line-height: 1.8; margin-bottom: 24px; }
.service-features { list-style: none; margin-bottom: 32px; }
.service-features li {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-mid);
  letter-spacing: 1px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}
.service-features li::before { content: '▸'; color: var(--accent); font-size: 10px; }

/* ── MATERIALS TABLE ── */
.materials-table { width: 100%; border-collapse: collapse; font-family: var(--font-ui); }
.materials-table thead tr { background: var(--bg-raised); border-bottom: 1px solid var(--accent-dim); }
.materials-table th { padding: 16px 24px; text-align: left; font-family: var(--font-mono); font-size: 10px; letter-spacing: 3px; color: var(--accent); text-transform: uppercase; font-weight: 400; }
.materials-table td { padding: 18px 24px; font-size: 14px; color: var(--text-mid); border-bottom: 1px solid var(--border); transition: background 0.2s, color 0.2s; }
.materials-table tr:hover td { background: var(--bg-raised); color: var(--text-hi); }
.mat-name { font-family: var(--font-display); font-size: 20px; letter-spacing: 2px; color: var(--text-hi); }
.mat-badge { display: inline-block; padding: 3px 10px; font-family: var(--font-mono); font-size: 10px; letter-spacing: 1px; text-transform: uppercase; }
.badge-low { background: rgba(245,196,0,0.1); color: var(--accent); border: 1px solid var(--accent-dim); }
.badge-med { background: rgba(200,168,75,0.1); color: #d4a843; border: 1px solid rgba(200,168,75,0.4); }
.badge-hi  { background: rgba(224,80,80,0.1); color: var(--red); border: 1px solid rgba(224,80,80,0.4); }
.mat-dots { display: flex; gap: 4px; }
.dot { width: 8px; height: 8px; background: var(--border-hi); clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%); }
.dot.filled { background: var(--accent); }

/* ── PORTFOLIO ── */
.portfolio-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; }
.portfolio-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  overflow: hidden;
  position: relative;
  transition: border-color 0.3s;
}
.portfolio-card:hover { border-color: var(--accent-dim); }
.portfolio-img {
  height: 200px;
  background: var(--bg-raised);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.portfolio-img::before {
  content: '';
  position: absolute; inset: 0;
  background:
    linear-gradient(45deg, transparent 49%, rgba(245,196,0,0.06) 49%, rgba(245,196,0,0.06) 51%, transparent 51%) 0 0 / 20px 20px,
    linear-gradient(-45deg, transparent 49%, rgba(245,196,0,0.03) 49%, rgba(245,196,0,0.03) 51%, transparent 51%) 0 0 / 20px 20px;
}
.portfolio-placeholder { font-family: var(--font-mono); font-size: 10px; color: var(--text-lo); letter-spacing: 2px; text-transform: uppercase; }
.portfolio-info { padding: 24px; }
.portfolio-title { font-family: var(--font-display); font-size: 22px; letter-spacing: 2px; color: var(--text-hi); margin-bottom: 8px; }
.portfolio-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.meta-pill {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 2px;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  padding: 3px 8px;
  text-transform: uppercase;
}
.portfolio-desc { font-size: 13px; color: var(--text-mid); line-height: 1.7; }

/* ── QUOTE FORM ── */
.quote-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: start; }
.form-group { margin-bottom: 20px; }
.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.form-label-th { font-family: var(--font-thai); font-size: 12px; color: var(--text-lo); margin-top: 2px; display: block; }
.form-input, .form-select, .form-textarea {
  width: 100%;
  background: var(--bg-panel);
  border: 1px solid var(--border-hi);
  color: var(--text-hi);
  font-family: var(--font-ui);
  font-size: 15px;
  padding: 14px 16px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-dim);
}
.form-select { cursor: pointer; }
.form-select option { background: var(--bg-panel); }
.form-textarea { resize: vertical; min-height: 120px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.file-drop {
  border: 2px dashed var(--border-hi);
  padding: 40px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  background: var(--bg-panel);
  margin-bottom: 20px;
}
.file-drop:hover { border-color: var(--accent); background: rgba(245,196,0,0.03); }
.file-drop-icon { font-size: 32px; color: var(--accent-dim); margin-bottom: 12px; }
.file-drop-text { font-family: var(--font-mono); font-size: 11px; color: var(--text-mid); letter-spacing: 2px; }
.file-drop-sub { font-family: var(--font-thai); font-size: 13px; color: var(--text-lo); margin-top: 8px; }
.quote-info-panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-hi);
  padding: 40px;
  position: relative;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}
.quote-info-panel::before {
  content: 'HOW IT WORKS';
  position: absolute;
  top: -1px; left: 24px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 3px;
  color: var(--accent);
  background: var(--bg-panel);
  padding: 0 8px;
  transform: translateY(-50%);
}
.step-item { display: flex; gap: 20px; margin-bottom: 32px; align-items: flex-start; }
.step-num {
  width: 36px; height: 36px;
  background: rgba(245,196,0,0.1);
  border: 1px solid var(--accent-dim);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--accent);
  flex-shrink: 0;
}
.step-content-title { font-family: var(--font-display); font-size: 18px; letter-spacing: 2px; color: var(--text-hi); margin-bottom: 4px; }
.step-content-desc { font-size: 13px; color: var(--text-mid); line-height: 1.7; }
.step-content-th { font-family: var(--font-thai); font-size: 12px; color: var(--text-lo); margin-top: 2px; }

/* ── ABOUT ── */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.about-text p { font-size: 15px; color: var(--text-mid); line-height: 1.9; margin-bottom: 20px; }
.about-text p.th { font-family: var(--font-thai); font-size: 15px; }
.about-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; }
.about-stat {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  padding: 28px 24px;
}
.about-stat-val { font-family: var(--font-display); font-size: 48px; color: var(--accent); line-height: 1; }
.about-stat-unit { font-family: var(--font-mono); font-size: 14px; color: var(--accent-dim); }
.about-stat-label { font-family: var(--font-mono); font-size: 10px; color: var(--text-mid); letter-spacing: 2px; text-transform: uppercase; margin-top: 6px; }
.about-stat-th { font-family: var(--font-thai); font-size: 12px; color: var(--text-lo); margin-top: 2px; }

/* ── CONTACT ── */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }
.contact-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}
.contact-icon { font-size: 20px; color: var(--accent); flex-shrink: 0; margin-top: 4px; }
.contact-label { font-family: var(--font-mono); font-size: 10px; letter-spacing: 3px; color: var(--accent-dim); text-transform: uppercase; margin-bottom: 6px; }
.contact-value { font-family: var(--font-ui); font-size: 18px; color: var(--text-hi); font-weight: 600; }
.contact-value a { color: inherit; text-decoration: none; }
.contact-value a:hover { color: var(--accent); }

/* ── CTA BANNER ── */
.cta-banner {
  background: var(--bg-panel);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute; inset: 0;
  background:
    linear-gradient(rgba(245,196,0,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245,196,0,0.02) 1px, transparent 1px);
  background-size: 24px 24px;
}
.cta-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  position: relative;
}
.cta-title { font-family: var(--font-display); font-size: clamp(36px, 4vw, 60px); letter-spacing: 4px; color: var(--text-hi); line-height: 1; margin-bottom: 8px; }
.cta-title span { color: var(--accent); }
.cta-sub { font-family: var(--font-thai); font-size: 16px; color: var(--text-mid); font-weight: 300; }
.cta-corner { position: absolute; font-family: var(--font-mono); font-size: 9px; letter-spacing: 2px; color: var(--text-lo); }
.cta-corner.tl { top: 16px; left: 80px; }
.cta-corner.tr { top: 16px; right: 80px; }

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--border);
  padding: 40px 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-base);
}
.footer-logo { font-family: var(--font-display); font-size: 18px; letter-spacing: 4px; color: var(--text-lo); }
.footer-mid { font-family: var(--font-mono); font-size: 10px; color: var(--text-lo); letter-spacing: 2px; text-align: center; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { font-family: var(--font-mono); font-size: 10px; color: var(--text-lo); letter-spacing: 2px; text-decoration: none; text-transform: uppercase; transition: color 0.2s; }
.footer-links a:hover { color: var(--accent); }

/* ── DESIGN GUIDELINES ── */
.guidelines-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; }
.guideline-card { background: var(--bg-panel); border: 1px solid var(--border); padding: 32px; }
.guideline-card:hover { border-color: var(--accent-dim); }
.guideline-icon { font-size: 24px; color: var(--accent); margin-bottom: 16px; }
.guideline-title { font-family: var(--font-display); font-size: 22px; letter-spacing: 2px; color: var(--text-hi); margin-bottom: 12px; }
.guideline-value { font-family: var(--font-mono); font-size: 18px; color: var(--accent); margin-bottom: 8px; }
.guideline-desc { font-size: 13px; color: var(--text-mid); line-height: 1.7; }

/* ── LANGUAGE: THAI MODE ── */
body.lang-th .hero-title { display: none; }
body.lang-th .hero-title-th {
  font-family: var(--font-thai);
  font-size: clamp(32px, 5vw, 64px);
  font-weight: 700;
  color: var(--text-hi);
  margin-bottom: 32px;
  letter-spacing: 0;
}
body.lang-th .section-title { display: none; }
body.lang-th .section-title-th {
  font-family: var(--font-thai);
  font-size: clamp(28px, 3.5vw, 50px);
  font-weight: 600;
  color: var(--text-hi);
  margin-top: 0;
  letter-spacing: 0;
}
body.lang-th .stat-label { display: none; }
body.lang-th .stat-label-th {
  color: var(--text-mid);
  font-size: 10px;
  letter-spacing: 1px;
  text-transform: uppercase;
}
body.lang-th .service-title-sm { display: none; }
body.lang-th .service-th-sm {
  font-family: var(--font-thai);
  font-size: 20px;
  font-weight: 600;
  color: var(--text-hi);
  margin-bottom: 16px;
}
body.lang-th .why-title { display: none; }
body.lang-th .why-th {
  font-family: var(--font-thai);
  font-size: 18px;
  font-weight: 600;
  color: var(--text-hi);
  margin-bottom: 12px;
}

/* ── ANIMATIONS ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-in { opacity: 0; transform: translateY(16px); transition: opacity 0.5s ease, transform 0.5s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ── RESPONSIVE ── */
@media (max-width: 1100px) {
  .services-detail-grid, .portfolio-grid, .quote-grid,
  .about-grid, .contact-grid, .guidelines-grid { grid-template-columns: 1fr; }
  section { padding: 80px 40px; }
  .cta-inner { flex-direction: column; text-align: center; }
  footer { flex-direction: column; gap: 24px; text-align: center; }
}
@media (max-width: 640px) {
  nav { padding: 0 20px; }
  .nav-links { display: none; }
  section { padding: 60px 24px; }
  .page-hero-inner { padding: 48px 24px; }
  .cta-inner { padding: 60px 24px; }
  footer { padding: 40px 24px; }
}