/*
  StackO PCB Design Studio - Weber-inspired CSS
  Version: 2.0

  Font style:
  - Headings use Rajdhani: technical, squared, futuristic.
  - Body uses Inter: clean and readable.
*/

/* THEME VARIABLES */
:root {
  --bg: #061220;
  --bg-2: #0b1f35;
  --surface: #0f2743;
  --surface-2: #113357;
  --text: #eef6ff;
  --muted: #a8b8ca;
  --line: rgba(255, 255, 255, 0.13);
  --brand-blue: #00519e;
  --blue: #0a72d8;
  --cyan: #3dd8ff;
  --ice: #dff7ff;
  --orange: #e48b2c;
  --green: #00d49f;
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.35);
  --radius-xl: 32px;
  --radius-lg: 22px;
}

html[data-theme="light"] {
  --bg: #f2f6fb;
  --bg-2: #ffffff;
  --surface: #ffffff;
  --surface-2: #eaf2fb;
  --text: #003f7d;
  --muted: #526b84;
  --line: rgba(0, 81, 158, 0.16);
  --brand-blue: #00519e;
  --blue: #005eaf;
  --cyan: #008ed0;
  --ice: #f5fbff;
  --orange: #d57d21;
  --green: #008c71;
  --shadow: 0 24px 70px rgba(0, 51, 100, 0.14);
}

/* RESET */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 10%, rgba(61, 216, 255, 0.20), transparent 26rem),
    radial-gradient(circle at 90% 14%, rgba(228, 139, 44, 0.12), transparent 24rem),
    linear-gradient(135deg, var(--bg), var(--bg-2));
  line-height: 1.65;
  overflow-x: hidden;
}

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

button,
input,
select,
textarea {
  font: inherit;
}

.container {
  width: min(1180px, calc(100% - 34px));
  margin: 0 auto;
}

.section {
  padding: 104px 0;
}

/* BACKGROUND ELEMENTS */
.site-bg-lines {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.38;
  background:
    linear-gradient(90deg, transparent 0 95%, rgba(61, 216, 255, 0.14) 95% 96%, transparent 96% 100%),
    linear-gradient(0deg, transparent 0 95%, rgba(61, 216, 255, 0.09) 95% 96%, transparent 96% 100%);
  background-size: 84px 84px;
  mask-image: radial-gradient(circle at 50% 30%, #000, transparent 75%);
}

.cursor-glow {
  position: fixed;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(61, 216, 255, 0.08), transparent 68%);
  pointer-events: none;
  transform: translate(-50%, -50%);
  z-index: -1;
}

/* HEADER */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(18px);
}

.nav {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 48px;
  height: 48px;
  position: relative;
  display: grid;
  place-items: center;
  border: 1px solid rgba(61, 216, 255, 0.42);
  border-radius: 16px;
  background:
    linear-gradient(135deg, rgba(0, 81, 158, 0.8), rgba(61, 216, 255, 0.18)),
    var(--surface);
  box-shadow: 0 0 34px rgba(61, 216, 255, 0.24);
}

.brand-chip {
  width: 24px;
  height: 24px;
  border-radius: 7px;
  background:
    linear-gradient(90deg, var(--cyan) 2px, transparent 2px) 0 0 / 8px 8px,
    linear-gradient(0deg, var(--cyan) 2px, transparent 2px) 0 0 / 8px 8px,
    var(--brand-blue);
  box-shadow: 0 0 18px rgba(61, 216, 255, 0.55);
}

.brand-text {
  display: grid;
  gap: 0;
}

.brand-text strong {
  font-family: "Rajdhani", sans-serif;
  font-size: 1.55rem;
  line-height: 1;
  color: var(--text);
  letter-spacing: 0.02em;
}

.brand-text small {
  font-size: 0.68rem;
  color: var(--muted);
  letter-spacing: 0.18em;
  font-weight: 800;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav-links a {
  position: relative;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -9px;
  width: 0;
  height: 2px;
  background: var(--cyan);
  transition: width 0.2s ease;
}

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

.nav-links a:hover::after {
  width: 100%;
}

.theme-toggle,
.mobile-menu-btn {
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  color: var(--text);
  cursor: pointer;
}

.theme-toggle {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  font-size: 1.15rem;
}

.mobile-menu-btn {
  display: none;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  padding: 12px;
}

.mobile-menu-btn span {
  display: block;
  height: 2px;
  background: var(--text);
  margin: 5px 0;
}

/* TYPOGRAPHY */
.eyebrow {
  font-family: "Rajdhani", sans-serif;
  color: var(--cyan);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

h1,
h2,
h3 {
  font-family: "Rajdhani", sans-serif;
  color: var(--text);
  line-height: 1.02;
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(3.1rem, 7vw, 6.7rem);
  font-weight: 600;
  max-width: 920px;
}

h2 {
  font-size: clamp(2.35rem, 4.4vw, 4.65rem);
  font-weight: 600;
  margin-bottom: 22px;
}

h3 {
  font-size: 1.65rem;
  font-weight: 600;
  margin-bottom: 12px;
}

p {
  color: var(--muted);
}

/* HERO */
.hero {
  padding-top: 118px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(360px, 0.94fr);
  gap: 62px;
  align-items: center;
}

.hero-subtitle {
  max-width: 730px;
  margin: 28px 0 34px;
  font-size: 1.12rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 0;
  padding: 0 24px;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
  font-weight: 900;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-3px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand-blue), var(--cyan));
  color: #ffffff;
  box-shadow: 0 16px 34px rgba(0, 81, 158, 0.35);
}

.btn-secondary {
  background: color-mix(in srgb, var(--surface) 72%, transparent);
  border-color: var(--line);
  color: var(--text);
}

.full-width {
  width: 100%;
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  max-width: 620px;
  margin-top: 38px;
  border: 1px solid var(--line);
  background: var(--line);
}

.metric-strip div {
  padding: 20px;
  background: color-mix(in srgb, var(--surface) 86%, transparent);
}

.metric-strip strong {
  display: block;
  font-family: "Rajdhani", sans-serif;
  font-size: 2rem;
  line-height: 1;
  color: var(--text);
}

.metric-strip span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* HERO VISUAL */
.hero-visual {
  min-height: 560px;
  display: grid;
  place-items: center;
}

.machine-frame {
  position: relative;
  width: min(480px, 100%);
  min-height: 540px;
  padding: 22px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.10), transparent 26%),
    color-mix(in srgb, var(--surface) 86%, transparent);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.machine-frame::before {
  content: "";
  position: absolute;
  inset: -80px;
  background: conic-gradient(from 180deg, transparent, rgba(61, 216, 255, 0.20), transparent, rgba(228, 139, 44, 0.15), transparent);
  animation: spin 16s linear infinite;
  opacity: 0.7;
}

.machine-frame > * {
  position: relative;
  z-index: 1;
}

.machine-topbar {
  height: 48px;
  display: flex;
  align-items: center;
  gap: 9px;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 0 16px;
  background: color-mix(in srgb, var(--bg) 74%, transparent);
}

.machine-topbar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.machine-topbar span:nth-child(1) { background: var(--cyan); }
.machine-topbar span:nth-child(2) { background: var(--orange); }
.machine-topbar span:nth-child(3) { background: var(--green); }

.pcb-scene {
  position: relative;
  height: 330px;
  margin: 20px 0;
  border: 1px solid var(--line);
  border-radius: 28px;
  background:
    linear-gradient(90deg, rgba(61, 216, 255, 0.12) 1px, transparent 1px),
    linear-gradient(rgba(61, 216, 255, 0.12) 1px, transparent 1px),
    radial-gradient(circle at 45% 40%, rgba(61, 216, 255, 0.18), transparent 42%),
    linear-gradient(135deg, #09213a, #05101d);
  background-size: 34px 34px, 34px 34px, auto, auto;
  overflow: hidden;
}

html[data-theme="light"] .pcb-scene {
  background:
    linear-gradient(90deg, rgba(0, 81, 158, 0.10) 1px, transparent 1px),
    linear-gradient(rgba(0, 81, 158, 0.10) 1px, transparent 1px),
    radial-gradient(circle at 45% 40%, rgba(0, 81, 158, 0.10), transparent 42%),
    linear-gradient(135deg, #edf7ff, #dceafa);
}

.pcb-layer {
  position: absolute;
  border: 1px solid rgba(61, 216, 255, 0.42);
  background: rgba(0, 81, 158, 0.18);
  border-radius: 18px;
  transform: skewY(-8deg);
}

.layer-1 { width: 78%; height: 48%; left: 11%; top: 28%; }
.layer-2 { width: 70%; height: 38%; left: 15%; top: 20%; opacity: 0.72; }
.layer-3 { width: 60%; height: 30%; left: 20%; top: 13%; opacity: 0.48; }

.main-chip {
  position: absolute;
  width: 106px;
  height: 106px;
  left: calc(50% - 53px);
  top: 118px;
  border-radius: 18px;
  background: #07111f;
  border: 1px solid rgba(61, 216, 255, 0.45);
  box-shadow: 0 0 38px rgba(61, 216, 255, 0.28);
}

.main-chip span {
  position: absolute;
  background: var(--cyan);
}

.main-chip span:nth-child(1) { width: 54px; height: 3px; top: 26px; left: 26px; }
.main-chip span:nth-child(2) { width: 54px; height: 3px; top: 52px; left: 26px; }
.main-chip span:nth-child(3) { width: 54px; height: 3px; top: 78px; left: 26px; }
.main-chip span:nth-child(4) { width: 3px; height: 54px; top: 26px; left: 52px; }

.node {
  position: absolute;
  width: 20px;
  height: 20px;
  background: var(--orange);
  border: 4px solid var(--ice);
  border-radius: 50%;
  box-shadow: 0 0 22px rgba(228, 139, 44, 0.55);
}

.node-a { left: 62px; top: 78px; }
.node-b { right: 70px; top: 94px; }
.node-c { left: 88px; bottom: 56px; }
.node-d { right: 92px; bottom: 70px; }

.trace {
  position: absolute;
  height: 4px;
  border-radius: 999px;
  background: var(--cyan);
  box-shadow: 0 0 14px rgba(61, 216, 255, 0.55);
}

.trace-a { width: 145px; left: 78px; top: 88px; transform: rotate(18deg); }
.trace-b { width: 155px; right: 83px; top: 116px; transform: rotate(-18deg); }
.trace-c { width: 150px; left: 105px; bottom: 75px; transform: rotate(-12deg); }
.trace-d { width: 140px; right: 110px; bottom: 86px; transform: rotate(12deg); }

.scan-line {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 70px;
  background: linear-gradient(to bottom, transparent, rgba(61, 216, 255, 0.18), transparent);
  animation: scan 4s ease-in-out infinite;
}

.status-panel {
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 18px;
  background: color-mix(in srgb, var(--bg) 76%, transparent);
}

.status-panel > p {
  font-family: "Rajdhani", sans-serif;
  color: var(--cyan);
  font-weight: 700;
  letter-spacing: 0.18em;
  margin-bottom: 12px;
}

.status-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 9px 0;
  border-top: 1px solid var(--line);
}

.status-row span {
  color: var(--muted);
}

.status-row strong {
  color: var(--text);
  font-family: "Rajdhani", sans-serif;
  font-size: 1.12rem;
}

/* SPLIT FEATURE */
.split-feature {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--surface) 68%, transparent), transparent),
    color-mix(in srgb, var(--bg-2) 70%, transparent);
}

.split-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 54px;
  align-items: end;
  margin-bottom: 36px;
}

.split-grid p {
  font-size: 1.05rem;
}

.solution-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.875fr 0.875fr;
  gap: 18px;
}

.solution-tile {
  min-height: 230px;
  padding: 28px;
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--surface) 94%, transparent), color-mix(in srgb, var(--surface-2) 84%, transparent));
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}

.solution-tile::after {
  content: "";
  position: absolute;
  right: -50px;
  bottom: -50px;
  width: 170px;
  height: 170px;
  background: radial-gradient(circle, rgba(61, 216, 255, 0.18), transparent 65%);
}

.large-tile {
  background:
    radial-gradient(circle at 80% 10%, rgba(228, 139, 44, 0.22), transparent 30%),
    linear-gradient(135deg, color-mix(in srgb, var(--surface) 94%, transparent), color-mix(in srgb, var(--brand-blue) 46%, transparent));
}

.tile-number {
  font-family: "Rajdhani", sans-serif;
  color: var(--cyan);
  font-size: 3.4rem;
  line-height: 1;
  font-weight: 600;
  margin-bottom: 26px;
}

/* COMMON CARD SECTIONS */
.section-heading {
  max-width: 820px;
  margin-bottom: 46px;
}

.cards-grid,
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card,
.portfolio-card,
.process-step,
.quote-form,
.contact-box {
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--surface) 96%, transparent), color-mix(in srgb, var(--surface-2) 78%, transparent));
  border-radius: var(--radius-lg);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.08);
}

.card {
  padding: 28px;
  min-height: 244px;
  position: relative;
  overflow: hidden;
}

.card::before,
.portfolio-card::before,
.process-step::before {
  content: "";
  position: absolute;
  inset: 0;
  border-top: 2px solid rgba(61, 216, 255, 0.35);
  pointer-events: none;
}

.card-icon {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  margin-bottom: 28px;
  border: 1px solid rgba(61, 216, 255, 0.35);
  color: var(--cyan);
  background: rgba(61, 216, 255, 0.08);
  border-radius: 18px;
  font-size: 1.5rem;
}

/* PROCESS */
.process-section {
  background:
    radial-gradient(circle at 15% 40%, rgba(61, 216, 255, 0.12), transparent 24rem),
    color-mix(in srgb, var(--bg-2) 80%, transparent);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.process-step {
  position: relative;
  padding: 28px;
  overflow: hidden;
}

.process-step span {
  display: block;
  font-family: "Rajdhani", sans-serif;
  color: var(--cyan);
  font-size: 3.2rem;
  font-weight: 600;
  line-height: 1;
  margin-bottom: 26px;
}

/* PORTFOLIO */
.portfolio-card {
  position: relative;
  overflow: hidden;
  padding: 18px 18px 26px;
}

.portfolio-visual {
  height: 178px;
  border-radius: 18px;
  margin-bottom: 20px;
  border: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(61, 216, 255, 0.14) 1px, transparent 1px),
    linear-gradient(rgba(61, 216, 255, 0.14) 1px, transparent 1px),
    radial-gradient(circle at 30% 40%, var(--cyan) 0 5px, transparent 6px),
    radial-gradient(circle at 70% 66%, var(--orange) 0 5px, transparent 6px),
    linear-gradient(135deg, #0d355c, #06111f);
  background-size: 24px 24px, 24px 24px, auto, auto, auto;
  position: relative;
  overflow: hidden;
}

.portfolio-visual::before {
  content: "";
  position: absolute;
  inset: 34px;
  border: 2px solid rgba(61, 216, 255, 0.35);
  transform: skewY(-8deg);
  border-radius: 18px;
}

.visual-2 { filter: hue-rotate(22deg); }
.visual-3 { filter: hue-rotate(48deg); }
.visual-4 { filter: hue-rotate(88deg); }

.portfolio-label {
  font-family: "Rajdhani", sans-serif;
  color: var(--cyan);
  font-weight: 700;
  letter-spacing: 0.16em;
  font-size: 0.84rem;
  margin-bottom: 6px;
}

/* QUOTE */
.quote-section {
  border-top: 1px solid var(--line);
  background:
    radial-gradient(circle at 85% 22%, rgba(61, 216, 255, 0.14), transparent 28rem),
    linear-gradient(135deg, color-mix(in srgb, var(--surface) 38%, transparent), transparent);
}

.quote-grid {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 54px;
  align-items: start;
}

.contact-box {
  margin-top: 28px;
  padding: 26px;
}

.contact-box p + p {
  margin-top: 10px;
}

.contact-box a {
  color: var(--cyan);
  font-weight: 900;
}

.quote-form {
  padding: 30px;
}

.form-row {
  margin-bottom: 17px;
}

.form-row label {
  display: block;
  font-family: "Rajdhani", sans-serif;
  color: var(--text);
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  color: var(--text);
  border-radius: 0;
  padding: 13px 14px;
  outline: none;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(61, 216, 255, 0.12);
}

.form-row.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form-note {
  font-size: 0.88rem;
  margin-top: 14px;
}

/* FOOTER */
.footer {
  border-top: 1px solid var(--line);
  padding: 30px 0;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

.footer a {
  color: var(--cyan);
  font-weight: 800;
}

/* ANIMATIONS */
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes scan {
  0%, 100% {
    transform: translateY(-100px);
    opacity: 0;
  }
  35%, 70% {
    opacity: 1;
  }
  50% {
    transform: translateY(330px);
  }
}

/* RESPONSIVE */
@media (max-width: 980px) {
  .hero-grid,
  .split-grid,
  .quote-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: auto;
  }

  .solution-grid {
    grid-template-columns: 1fr;
  }

  .cards-grid,
  .portfolio-grid,
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 720px) {
  .section {
    padding: 78px 0;
  }

  .hero {
    padding-top: 86px;
  }

  .mobile-menu-btn {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: 78px;
    left: 17px;
    right: 17px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 22px;
    background: var(--surface);
    box-shadow: var(--shadow);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links a {
    padding: 14px 0;
  }

  .theme-toggle {
    width: 100%;
    margin-top: 10px;
  }

  .hero-actions,
  .metric-strip,
  .form-row.split {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    display: grid;
  }

  .cards-grid,
  .portfolio-grid,
  .process-grid {
    grid-template-columns: 1fr;
  }

  .machine-frame {
    min-height: 500px;
  }

  .pcb-scene {
    height: 300px;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 2.8rem;
  }

  .brand-text small {
    display: none;
  }

  .metric-strip {
    display: grid;
  }

  .quote-form,
  .card,
  .process-step,
  .solution-tile {
    padding: 22px;
  }
}