*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

:root {
  --bg:         #0a0a0a;
  --surface:    #111;
  --surface2:   #161616;
  --border:     #1e1e1e;
  --green:      #4ade80;
  --green-dim:  #22c55e;
  --green-dark: #166534;
  --green-glow: rgba(74, 222, 128, 0.15);
  --text:       #e5e5e5;
  --muted:      #555;
  --muted2:     #333;
  --line-color: #00b900;
  --fb-color:   #1877f2;
  --yt-color:   #ff0000;
  --tg-color:   #229ed9;
  --font-mono:  'Silkscreen', 'IBM Plex Mono', 'SF Mono', monospace;
  --font-body:  'IBM Plex Sans Thai', sans-serif;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
}

#bg-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

body.canvas-ready #bg-canvas { opacity: 1; }

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }
::-webkit-scrollbar-thumb:hover { background: var(--green-dim); }

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10,10,10,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.nav-logo-icon {
  background: var(--green);
  color: #0a0a0a;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 3px 6px;
  border-radius: 4px;
}

.nav-logo-text {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text);
  letter-spacing: 0.05em;
  text-shadow:
    0 0 6px rgba(74,222,128,0.5),
    0 0 14px rgba(74,222,128,0.25);
}

.nav-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--green); }

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.lang-toggle,
.hamburger {
  background: transparent;
  border: 0;
}

.lang-toggle {
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  padding: 3px 8px;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}

.lang-toggle:hover {
  border-color: var(--green);
  color: var(--green);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 20px;
  height: 1px;
  background: var(--muted);
  transition: all 0.2s;
}

section {
  position: relative;
  z-index: 1;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--green);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  text-shadow:
    0 0 8px rgba(74,222,128,0.6),
    0 0 20px rgba(74,222,128,0.25);
}

.section-title {
  font-size: 2rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 0.75rem;
}

.section-desc {
  color: var(--muted);
  max-width: 520px;
}

.section-header {
  margin-bottom: 3rem;
}

#home {
  padding: 9rem 0 6rem;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 0.3rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--green);
  margin-bottom: 1.75rem;
}

.hero-tag::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 600;
  line-height: 1.15;
  color: #fff;
  margin-bottom: 0.5rem;
}

.hero-title span {
  color: var(--green);
  font-family: var(--font-mono);
  text-shadow:
    0 0 4px rgba(74,222,128,0.9),
    0 0 11px rgba(74,222,128,0.7),
    0 0 22px rgba(74,222,128,0.5),
    0 0 45px rgba(74,222,128,0.3),
    0 0 90px rgba(34,197,94,0.15);
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--muted);
  margin-bottom: 2.5rem;
  max-width: 480px;
}

.hero-btns {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  text-decoration: none;
  letter-spacing: 0.05em;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--green);
  color: #0a0a0a;
}

.btn-primary:hover {
  background: #86efac;
  box-shadow: 0 0 20px var(--green-glow);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--green);
  color: var(--green);
}

.hero-stats {
  display: flex;
  gap: 3rem;
  margin-top: 4rem;
  padding-top: 3rem;
  border-top: 1px solid var(--border);
}

.stat-num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--green);
  text-shadow:
    0 0 6px rgba(74,222,128,0.8),
    0 0 16px rgba(74,222,128,0.4),
    0 0 35px rgba(74,222,128,0.2);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.2rem;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.75rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.card:hover {
  border-color: var(--green-dim);
  box-shadow: 0 0 30px var(--green-glow);
}

.card-img {
  width: 100%;
  max-height: 180px;
  object-fit: contain;
  margin-bottom: 1.25rem;
  filter: brightness(0.9);
}

.card-title {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--green);
  margin-bottom: 0.5rem;
  text-shadow:
    0 0 6px rgba(74,222,128,0.6),
    0 0 15px rgba(74,222,128,0.3);
}

.card-desc {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
}

#hardware,
#software,
#tools,
#contact,
#download {
  padding: 6rem 0;
  border-top: 1px solid var(--border);
}

.section-cta {
  margin-top: 2rem;
}

.tools-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 2rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.tool-card:hover {
  border-color: var(--green-dim);
  box-shadow: 0 0 30px var(--green-glow);
}

.tool-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.tool-icon {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: rgba(74,222,128,0.1);
  border: 1px solid rgba(74,222,128,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--green);
  flex-shrink: 0;
}

.tool-name {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--green);
  text-shadow:
    0 0 6px rgba(74,222,128,0.6),
    0 0 15px rgba(74,222,128,0.3);
}

.tool-tagline {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 1px;
}

.tool-desc {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.steps {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.step {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--green);
  background: rgba(74,222,128,0.08);
  border: 1px solid rgba(74,222,128,0.15);
  border-radius: 4px;
  padding: 2px 6px;
  flex-shrink: 0;
  margin-top: 2px;
}

.step-text {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.5;
}

.step-text code {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  background: rgba(74,222,128,0.06);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 1px 5px;
  color: var(--green);
}

.tool-footer {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 7px;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.contact-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
  text-decoration: none;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: border-color 0.2s, transform 0.15s, box-shadow 0.2s;
}

.contact-card:hover {
  transform: translateY(-2px);
}

.contact-card.line:hover   { border-color: var(--line-color); box-shadow: 0 4px 20px rgba(0,185,0,0.15); }
.contact-card.fb:hover     { border-color: var(--fb-color);   box-shadow: 0 4px 20px rgba(24,119,242,0.15); }
.contact-card.yt:hover     { border-color: var(--yt-color);   box-shadow: 0 4px 20px rgba(255,0,0,0.15); }
.contact-card.tg:hover     { border-color: var(--tg-color);   box-shadow: 0 4px 20px rgba(34,158,217,0.15); }

.contact-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-icon.line { background: rgba(0,185,0,0.12); color: var(--line-color); }
.contact-icon.fb   { background: rgba(24,119,242,0.12); color: var(--fb-color); }
.contact-icon.yt   { background: rgba(255,0,0,0.12); color: var(--yt-color); }
.contact-icon.tg   { background: rgba(34,158,217,0.12); color: var(--tg-color); }

.contact-icon svg { width: 20px; height: 20px; }

.contact-name {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--green);
}

.contact-desc {
  font-size: 0.83rem;
  color: var(--muted);
}

.contact-cta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--muted2);
  margin-top: auto;
}

.download-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.download-copy .section-title {
  margin-bottom: 0.5rem;
}

.download-copy p {
  color: var(--muted);
  font-size: 0.9rem;
}

.download-btns {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding: 2rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted2);
}

footer a { color: var(--green); text-decoration: none; }

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    background: rgba(10,10,10,0.97);
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border);
    gap: 1.25rem;
    z-index: 99;
  }
  .hero-stats { gap: 1.5rem; flex-wrap: wrap; }
  .tools-grid { grid-template-columns: 1fr; }
  .download-box { flex-direction: column; }
}