/* ═══════════════════════════════════════════
   SCADA Thailand — Main Stylesheet
   ═══════════════════════════════════════════ */

:root {
  --bg: #050d14;
  --bg2: #071520;
  --panel: #0a1e2e;
  --accent: #00e5ff;
  --accent2: #ff6b00;
  --accent3: #00ff9d;
  --text: #c8dde8;
  --text-dim: #5a7a8a;
  --border: rgba(0,229,255,0.15);
  --glow: 0 0 20px rgba(0,229,255,0.3);
  --font-head: 'Rajdhani', sans-serif;
  --font-mono: 'Share Tech Mono', monospace;
  --font-body: 'Sarabun', sans-serif;
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ── GRID BACKGROUND ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,229,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

/* ── NOISE OVERLAY ── */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: 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='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
}

/* ── 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: rgba(5,13,20,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.logo-icon { width: 36px; height: 36px; position: relative; }
.logo-icon svg { width: 100%; height: 100%; }
.logo-text { font-family: var(--font-head); font-size: 1.4rem; font-weight: 700; letter-spacing: 2px; color: #fff; }
.logo-text span { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 32px; list-style: none; }
.nav-links a { font-family: var(--font-head); font-size: 0.85rem; font-weight: 600; letter-spacing: 1.5px; text-transform: uppercase; color: var(--text-dim); text-decoration: none; transition: color 0.2s; }
.nav-links a:hover { color: var(--accent); }
.lang-toggle { display: flex; background: var(--panel); border: 1px solid var(--border); border-radius: 4px; overflow: hidden; }
.lang-btn { padding: 5px 12px; font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 1px; cursor: pointer; background: none; border: none; color: var(--text-dim); transition: all 0.2s; }
.lang-btn.active { background: var(--accent); color: #000; font-weight: bold; }

/* ── HERO ── */
#hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding: 80px 40px 40px; overflow: hidden; z-index: 1; }
.hero-bg-circle { position: absolute; border-radius: 50%; filter: blur(80px); pointer-events: none; }
.hbc1 { width: 600px; height: 600px; background: radial-gradient(circle, rgba(0,229,255,0.08) 0%, transparent 70%); top: -100px; right: -100px; }
.hbc2 { width: 400px; height: 400px; background: radial-gradient(circle, rgba(255,107,0,0.06) 0%, transparent 70%); bottom: 0; left: -50px; }
.hero-content { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; width: 100%; }
.hero-tag { font-family: var(--font-mono); font-size: 0.75rem; color: var(--accent); letter-spacing: 3px; text-transform: uppercase; margin-bottom: 20px; display: flex; align-items: center; gap: 10px; }
.hero-tag::before { content: ''; display: block; width: 30px; height: 1px; background: var(--accent); }
h1 { font-family: var(--font-head); font-size: clamp(2.5rem, 5vw, 4.5rem); font-weight: 700; line-height: 1.05; color: #fff; letter-spacing: 1px; margin-bottom: 24px; }
h1 .accent { color: var(--accent); }
h1 .accent2 { color: var(--accent2); }
.hero-desc { font-size: 1.05rem; line-height: 1.8; color: var(--text); margin-bottom: 40px; max-width: 500px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }

/* ── BUTTONS ── */
.btn-primary {
  padding: 14px 32px;
  background: var(--accent);
  color: #000;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: all 0.2s;
}
.btn-primary:hover { background: #fff; box-shadow: var(--glow); }
.btn-primary:disabled {
  background: var(--text-dim);
  color: #333;
  cursor: not-allowed;
  box-shadow: none;
  opacity: 0.5;
}
.btn-outline {
  padding: 13px 32px;
  background: transparent;
  color: var(--accent);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  border: 1px solid var(--accent);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: all 0.2s;
}
.btn-outline:hover { background: rgba(0,229,255,0.1); }

/* ── SCADA VISUAL ── */
.hero-visual { position: relative; }
.scada-panel { background: var(--panel); border: 1px solid var(--border); border-radius: 2px; padding: 20px; position: relative; box-shadow: var(--glow); }
.panel-header { display: flex; align-items: center; justify-content: space-between; padding-bottom: 14px; border-bottom: 1px solid var(--border); margin-bottom: 16px; }
.panel-title { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 2px; color: var(--accent); }
.panel-dots { display: flex; gap: 6px; }
.panel-dots span { width: 8px; height: 8px; border-radius: 50%; }
.dot-red { background: #ff4444; }
.dot-yellow { background: #ffcc00; }
.dot-green { background: var(--accent3); box-shadow: 0 0 6px var(--accent3); }
.gauge-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 16px; }
.gauge { background: rgba(0,0,0,0.3); border: 1px solid var(--border); padding: 12px 10px; text-align: center; }
.gauge-val { font-family: var(--font-mono); font-size: 1.5rem; color: var(--accent); line-height: 1; margin-bottom: 4px; }
.gauge-val.warn { color: var(--accent2); }
.gauge-val.ok { color: var(--accent3); }
.gauge-label { font-size: 0.65rem; color: var(--text-dim); letter-spacing: 1px; text-transform: uppercase; }
.chart-area { height: 90px; background: rgba(0,0,0,0.3); border: 1px solid var(--border); margin-bottom: 12px; position: relative; overflow: hidden; }
.chart-area svg { width: 100%; height: 100%; }
.chart-line { fill: none; stroke: var(--accent); stroke-width: 1.5; filter: drop-shadow(0 0 4px var(--accent)); }
.chart-fill { fill: url(#chartGrad); }
.status-bar { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.status-item { background: rgba(0,0,0,0.3); border: 1px solid var(--border); padding: 8px; display: flex; align-items: center; gap: 6px; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; animation: blink 2s infinite; }
.status-dot.online { background: var(--accent3); box-shadow: 0 0 4px var(--accent3); }
.status-dot.warn { background: var(--accent2); box-shadow: 0 0 4px var(--accent2); animation-delay: 0.5s; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }
.status-name { font-family: var(--font-mono); font-size: 0.6rem; color: var(--text-dim); letter-spacing: 0.5px; }

/* ── STATS STRIP ── */
.stats-strip { position: relative; z-index: 1; background: var(--panel); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: 32px 40px; }
.stats-inner { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.stat-item { text-align: center; padding: 0 24px; border-right: 1px solid var(--border); }
.stat-item:last-child { border-right: none; }
.stat-num { font-family: var(--font-head); font-size: 2.8rem; font-weight: 700; color: var(--accent); line-height: 1; margin-bottom: 6px; }
.stat-label { font-size: 0.8rem; color: var(--text-dim); letter-spacing: 1px; text-transform: uppercase; }

/* ── SECTION COMMON ── */
section { position: relative; z-index: 1; padding: 100px 40px; }
.section-inner { max-width: 1200px; margin: 0 auto; }
.section-tag { font-family: var(--font-mono); font-size: 0.7rem; color: var(--accent2); letter-spacing: 3px; text-transform: uppercase; margin-bottom: 12px; }
h2 { font-family: var(--font-head); font-size: clamp(2rem, 4vw, 3rem); font-weight: 700; color: #fff; letter-spacing: 1px; margin-bottom: 16px; }
h2 span { color: var(--accent); }
.section-sub { font-size: 1rem; color: var(--text-dim); max-width: 600px; line-height: 1.8; margin-bottom: 60px; }

/* ── SERVICES ── */
#services { background: var(--bg2); }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); }
.service-card { background: var(--bg2); padding: 36px 28px; transition: background 0.3s; cursor: default; }
.service-card:hover { background: var(--panel); }
.service-icon { width: 48px; height: 48px; margin-bottom: 20px; color: var(--accent); }
.service-card h3 { font-family: var(--font-head); font-size: 1.2rem; font-weight: 700; color: #fff; letter-spacing: 1px; margin-bottom: 12px; }
.service-card p { font-size: 0.9rem; line-height: 1.7; color: var(--text-dim); }
.service-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 16px; }
.tag { padding: 3px 8px; background: rgba(0,229,255,0.08); border: 1px solid rgba(0,229,255,0.2); font-family: var(--font-mono); font-size: 0.65rem; color: var(--accent); letter-spacing: 1px; }

/* ── TECH STACK ── */
#tech { background: var(--bg); }
.tech-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; }
.tech-item { background: var(--panel); border: 1px solid var(--border); padding: 20px 12px; text-align: center; transition: border-color 0.2s, box-shadow 0.2s; cursor: default; }
.tech-item:hover { border-color: var(--accent); box-shadow: var(--glow); }
.tech-logo { font-family: var(--font-mono); font-size: 1rem; color: var(--accent); margin-bottom: 8px; font-weight: bold; }
.tech-name { font-size: 0.7rem; color: var(--text-dim); letter-spacing: 1px; }

/* ── WHY US ── */
#why { background: var(--bg2); }
.why-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.why-list { list-style: none; display: flex; flex-direction: column; gap: 24px; }
.why-item { display: flex; gap: 16px; align-items: flex-start; }
.why-num { font-family: var(--font-mono); font-size: 0.65rem; color: var(--accent); background: rgba(0,229,255,0.1); border: 1px solid rgba(0,229,255,0.3); padding: 4px 8px; flex-shrink: 0; margin-top: 3px; }
.why-text h4 { font-family: var(--font-head); font-size: 1.05rem; font-weight: 700; color: #fff; margin-bottom: 6px; letter-spacing: 0.5px; }
.why-text p { font-size: 0.88rem; color: var(--text-dim); line-height: 1.7; }
.terminal-box { background: #020a10; border: 1px solid var(--accent); box-shadow: var(--glow); padding: 0; overflow: hidden; font-family: var(--font-mono); }
.terminal-header { background: var(--panel); padding: 10px 16px; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 8px; }
.terminal-title { font-size: 0.7rem; color: var(--text-dim); letter-spacing: 1px; flex: 1; }
.terminal-body { padding: 20px; font-size: 0.78rem; line-height: 1.9; color: var(--accent3); }
.term-line { display: block; }
.term-prompt { color: var(--accent2); }
.term-comment { color: var(--text-dim); }
.term-success { color: var(--accent3); }
.term-white { color: #fff; }

/* ── CONTACT EMAIL PROTECTION ── */
#contact-email { user-select: none; -webkit-user-select: none; -ms-user-select: none; cursor: pointer; }

/* ── CONTACT ── */
#contact { background: var(--bg); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; }
.contact-info h3 { font-family: var(--font-head); font-size: 1.5rem; font-weight: 700; color: #fff; margin-bottom: 20px; letter-spacing: 1px; }
.contact-info p { font-size: 0.9rem; line-height: 1.8; color: var(--text-dim); margin-bottom: 32px; }
.contact-detail { display: flex; flex-direction: column; gap: 16px; }
.contact-row { display: flex; align-items: center; gap: 12px; padding: 12px 16px; background: var(--panel); border: 1px solid var(--border); }
.contact-row svg { width: 18px; height: 18px; color: var(--accent); flex-shrink: 0; }
.contact-row span { font-family: var(--font-mono); font-size: 0.82rem; color: var(--text); }
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-family: var(--font-mono); font-size: 0.68rem; color: var(--accent); letter-spacing: 2px; text-transform: uppercase; }
.form-group input,
.form-group textarea,
.form-group select {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px 16px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
  width: 100%;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus { border-color: var(--accent); box-shadow: 0 0 0 1px rgba(0,229,255,0.2); }
.form-group input.invalid,
.form-group textarea.invalid,
.form-group select.invalid { border-color: var(--accent2); }
.form-group select option { background: var(--panel); }
.form-group textarea { resize: vertical; min-height: 120px; }

/* Form feedback messages */
.form-msg {
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 1px;
  display: none;
}
.form-msg.success { background: rgba(0,255,157,0.1); border: 1px solid var(--accent3); color: var(--accent3); }
.form-msg.error   { background: rgba(255,107,0,0.1); border: 1px solid var(--accent2); color: var(--accent2); }
.form-msg.visible { display: block; }

/* ── FOOTER ── */
footer { background: var(--panel); border-top: 1px solid var(--border); padding: 40px; position: relative; z-index: 1; }
.footer-inner { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; }
.footer-copy { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-dim); letter-spacing: 1px; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-dim); text-decoration: none; letter-spacing: 1px; transition: color 0.2s; }
.footer-links a:hover { color: var(--accent); }

/* ── LANGUAGE SWITCHING ── */
[data-th] { display: none; }
body.lang-th [data-en] { display: none; }
body.lang-th [data-th] { display: revert; }
body.lang-th [data-th].flex { display: flex; }
body.lang-th [data-th].grid { display: grid; }
body.lang-th [data-th].block { display: block; }

/* ── SCAN LINE ANIMATION ── */
@keyframes scanline { 0% { top: -5%; } 100% { top: 105%; } }
.scada-panel::after { content: ''; position: absolute; left: 0; right: 0; height: 2px; background: linear-gradient(transparent, rgba(0,229,255,0.15), transparent); animation: scanline 4s linear infinite; pointer-events: none; }

/* ── MARQUEE ── */
.marquee-strip { background: rgba(0,229,255,0.05); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: 10px 0; overflow: hidden; position: relative; z-index: 1; }
.marquee-track { display: flex; animation: marquee 30s linear infinite; white-space: nowrap; }
.marquee-track span { font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-dim); letter-spacing: 2px; padding: 0 32px; }
.marquee-track span.dot { color: var(--accent); padding: 0; }
@keyframes marquee { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* ── SCROLL ANIMATIONS ── */
.fade-up { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .hero-content { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: 1fr; }
  .tech-grid { grid-template-columns: repeat(3, 1fr); }
  .why-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  nav { padding: 0 20px; }
  .nav-links { display: none; }
  section { padding: 60px 20px; }
  h1 { font-size: 2.5rem; }
}