/* ===========================================================
   iT4You — design tokens
   Ink Black #0B0C0E · Panel #16181C · Circuit Red #E8352B
   Ember Red #7A1010 · Solder Silver #C9CDD3 · Warm White #F5F3EE
=========================================================== */

:root{
  --ink: #0B0C0E;
  --panel: #16181C;
  --panel-2: #1D2025;
  --red: #E8352B;
  --ember: #7A1010;
  --silver: #C9CDD3;
  --white: #F5F3EE;
  --line: #2A2D33;

  --display: 'Chakra Petch', 'Sarabun', sans-serif;
  --body: 'Sarabun', sans-serif;

  --wrap: 1120px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin:0;
  background: var(--ink);
  color: var(--white);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img{ max-width:100%; display:block; }

.wrap{
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

h1,h2,h3{
  font-family: var(--display);
  font-weight: 700;
  margin: 0 0 .5em;
  letter-spacing: .01em;
}

a{ color: inherit; text-decoration: none; }

@media (prefers-reduced-motion: reduce){
  *{ animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ---------- circuit trace background layer ---------- */
.trace-field{
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: .35;
}
.trace-field svg{ width:100%; height:100%; }
.trace{
  fill:none;
  stroke: var(--line);
  stroke-width: 1.5;
}
.trace-field .node{ fill: var(--ember); }

/* ---------- header ---------- */
.site-header{
  position: sticky;
  top:0;
  z-index: 50;
  background: rgba(11,12,14,.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content: space-between;
  height: 72px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-family: var(--display);
  font-size: 1.3rem;
  font-weight: 700;
}
.brand em{ font-style:normal; color: var(--red); }

.nav{ display:flex; align-items:center; gap: 28px; }
.nav a{
  font-size: .95rem;
  color: var(--silver);
  transition: color .2s;
}
.nav a:hover, .nav a:focus-visible{ color: var(--white); }
.nav-cta{
  background: var(--red);
  color: var(--white) !important;
  padding: 9px 18px;
  border-radius: 4px;
  font-weight: 600;
}
.nav-cta:hover{ background:#c92a21; }

.nav-toggle{
  display:none;
  flex-direction:column;
  gap:5px;
  background:none;
  border:none;
  cursor:pointer;
  padding: 8px;
}
.nav-toggle span{
  width: 24px; height: 2px; background: var(--white);
}

/* ---------- hero ---------- */
.hero{
  position: relative;
  z-index: 1;
  padding: 96px 0 64px;
}
.eyebrow{
  color: var(--red);
  font-family: var(--display);
  letter-spacing: .12em;
  text-transform: uppercase;
  font-size: .8rem;
  margin: 0 0 18px;
}
.hero h1{
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  line-height: 1.12;
  max-width: 14ch;
}
.hero h1 .accent{ color: var(--red); }
.hero-sub{
  max-width: 56ch;
  color: var(--silver);
  font-size: 1.05rem;
  margin: 20px 0 32px;
}
.hero-actions{ display:flex; gap:16px; flex-wrap: wrap; margin-bottom: 56px; }

.btn{
  display:inline-block;
  padding: 14px 28px;
  border-radius: 4px;
  font-weight: 600;
  font-family: var(--display);
  font-size: .95rem;
  transition: transform .15s, background .2s, border-color .2s;
  border: 1.5px solid transparent;
}
.btn:hover{ transform: translateY(-2px); }
.btn-primary{ background: var(--red); color: var(--white); }
.btn-primary:hover{ background:#c92a21; }
.btn-ghost{ border-color: var(--line); color: var(--white); }
.btn-ghost:hover{ border-color: var(--red); }

.hero-stats{
  display:grid;
  grid-template-columns: repeat(3,1fr);
  gap: 24px;
  max-width: 560px;
  border-top: 1px solid var(--line);
  padding-top: 28px;
}
.hero-stats strong{
  display:block;
  font-family: var(--display);
  color: var(--red);
  font-size: 1.15rem;
}
.hero-stats span{ color: var(--silver); font-size: .85rem; }

/* ---------- generic section ---------- */
.section{ position:relative; z-index:1; padding: 84px 0; }
.section-alt{ background: rgba(22,24,28,.55); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.section-eyebrow{
  color: var(--red);
  font-family: var(--display);
  letter-spacing:.12em;
  text-transform: uppercase;
  font-size: .78rem;
  margin: 0 0 12px;
}
.section h2{ font-size: clamp(1.7rem, 3vw, 2.3rem); max-width: 20ch; }
.section-lead{ color: var(--silver); max-width: 60ch; margin-top: 8px; }

/* ---------- service cards ---------- */
.card-grid{
  margin-top: 40px;
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.service-card{
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 28px 22px;
  transition: border-color .2s, transform .2s;
}
.service-card:hover{ border-color: var(--red); transform: translateY(-4px); }
.service-card .icon{ width: 40px; height:40px; color: var(--red); margin-bottom: 18px; }
.service-card h3{ font-size: 1.05rem; margin-bottom: 8px; }
.service-card p{ color: var(--silver); font-size: .9rem; margin:0; }

/* ---------- pricing ---------- */
.price-tabs{ display:flex; gap:10px; margin: 36px 0 0; }
.tab-btn{
  font-family: var(--display);
  background: transparent;
  border: 1.5px solid var(--line);
  color: var(--silver);
  padding: 10px 22px;
  border-radius: 4px;
  cursor:pointer;
  font-size: .9rem;
  transition: all .2s;
}
.tab-btn.active{ background: var(--red); border-color: var(--red); color: var(--white); }

.price-panel{ display:none; margin-top: 24px; }
.price-panel.active{ display:block; }

.price-table{
  width:100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}
.price-table th{
  text-align:left;
  font-family: var(--display);
  background: var(--panel-2);
  color: var(--red);
  padding: 14px 20px;
  font-size: .85rem;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.price-table td{
  padding: 16px 20px;
  border-top: 1px solid var(--line);
  font-size: .95rem;
}
.price-table tr td:last-child{
  font-family: var(--display);
  color: var(--white);
  white-space: nowrap;
  text-align: right;
  font-weight: 600;
}
.price-table .note{ color: var(--silver); font-size: .8rem; display:block; margin-top:2px; }
.price-footnote{ color: var(--silver); font-size: .85rem; margin-top: 18px; }

/* ---------- process steps ---------- */
.steps{
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.steps li{
  display:flex;
  flex-direction:column;
  gap: 12px;
  padding: 24px;
  border-top: 2px solid var(--red);
  background: var(--panel);
}
.step-no{
  font-family: var(--display);
  color: var(--ember);
  font-size: 1.6rem;
  font-weight: 700;
}
.steps h3{ font-size: 1rem; margin-bottom:6px; }
.steps p{ color: var(--silver); font-size: .88rem; margin:0; }

/* ---------- why grid ---------- */
.why-grid{
  margin-top: 36px;
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.why-item{
  border-left: 2px solid var(--red);
  padding-left: 18px;
}
.why-item h3{ font-size: 1rem; margin-bottom: 8px; }
.why-item p{ color: var(--silver); font-size: .9rem; margin:0; }

/* ---------- contact ---------- */
.contact-grid{
  margin-top: 40px;
  display:grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 40px;
}
.contact-info{ display:flex; flex-direction:column; gap: 20px; }
.info-row{
  display:flex;
  flex-direction:column;
  gap: 4px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}
.info-label{
  font-family: var(--display);
  color: var(--red);
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.info-row a:hover{ color: var(--red); }

.contact-form{ display:flex; flex-direction:column; gap: 16px; }
.contact-form label{
  display:flex;
  flex-direction:column;
  gap:6px;
  font-size: .85rem;
  color: var(--silver);
}
.contact-form input,
.contact-form textarea{
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 12px 14px;
  color: var(--white);
  font-family: var(--body);
  font-size: .95rem;
  resize: vertical;
}
.contact-form input:focus,
.contact-form textarea:focus{
  outline: none;
  border-color: var(--red);
}
.contact-form button{ align-self:flex-start; border:none; cursor:pointer; margin-top:4px; }

/* ---------- footer ---------- */
.site-footer{
  position: relative; z-index:1;
  border-top: 1px solid var(--line);
  padding: 28px 0;
}
.footer-inner{
  display:flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--silver);
  font-size: .85rem;
}
.footer-inner a:hover{ color: var(--red); }

/* ---------- focus visibility ---------- */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline: 2px solid var(--red);
  outline-offset: 2px;
}

/* ===========================================================
   Responsive
=========================================================== */
@media (max-width: 900px){
  .card-grid{ grid-template-columns: repeat(2,1fr); }
  .steps{ grid-template-columns: repeat(2,1fr); }
  .why-grid{ grid-template-columns: repeat(2,1fr); }
  .contact-grid{ grid-template-columns: 1fr; }
}

@media (max-width: 680px){
  .nav{
    position: absolute;
    top: 72px; left:0; right:0;
    background: var(--ink);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 24px 28px;
    gap: 18px;
    display:none;
  }
  .nav.open{ display:flex; }
  .nav-toggle{ display:flex; }
  .hero-stats{ grid-template-columns: 1fr; gap: 14px; }
  .card-grid{ grid-template-columns: 1fr; }
  .steps{ grid-template-columns: 1fr; }
  .why-grid{ grid-template-columns: 1fr; }
}