:root {
  --bg: #eef1f4;
  --bg-deep: #dfe5ec;
  --ink: #12151a;
  --muted: #5b6572;
  --line: rgba(18, 21, 26, 0.12);
  --accent: #b84a1f;
  --accent-soft: rgba(184, 74, 31, 0.12);
  --panel: rgba(255, 255, 255, 0.55);
  --shadow: 0 18px 50px rgba(18, 21, 26, 0.08);
  --font-display: "Syne", sans-serif;
  --font-body: "IBM Plex Sans", sans-serif;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.55;
  background:
    radial-gradient(900px 420px at 90% -10%, rgba(184, 74, 31, 0.14), transparent 55%),
    radial-gradient(700px 380px at 0% 20%, rgba(40, 78, 110, 0.1), transparent 50%),
    linear-gradient(180deg, #f5f7f9 0%, var(--bg) 40%, #e8edf2 100%);
  background-attachment: fixed;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(18, 21, 26, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18, 21, 26, 0.045) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 35%, transparent 80%);
}

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

h1,
h2,
h3,
.brand,
.brand-mark {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.top {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1.2rem, 4vw, 3rem);
  backdrop-filter: blur(12px);
  background: rgba(238, 241, 244, 0.78);
  border-bottom: 1px solid var(--line);
}

.brand-mark {
  font-size: 1.15rem;
  font-weight: 800;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.95rem;
  color: var(--muted);
}

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

.nav-cta {
  color: var(--ink) !important;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 0.1rem;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  min-height: calc(100vh - 64px);
  align-items: stretch;
  overflow: hidden;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(2rem, 6vw, 5rem) clamp(1.2rem, 4vw, 3rem);
  max-width: 720px;
}

.brand {
  margin: 0 0 1rem;
  font-size: clamp(2.8rem, 7vw, 5.4rem);
  line-height: 0.92;
  font-weight: 800;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.45rem, 2.6vw, 2.05rem);
  line-height: 1.2;
  font-weight: 600;
  max-width: 18ch;
}

.lead {
  margin: 0 0 1.75rem;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 38ch;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.75rem 1.25rem;
  border-radius: 4px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 0.98rem;
  font-weight: 560;
  cursor: pointer;
  transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--ink);
  color: #f4f6f8;
}

.btn-primary:hover {
  background: #000;
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--ink);
}

.hero-visual {
  position: relative;
  min-height: 420px;
  background:
    linear-gradient(145deg, rgba(18, 21, 26, 0.92), rgba(35, 52, 68, 0.96)),
    radial-gradient(circle at 70% 20%, rgba(184, 74, 31, 0.35), transparent 45%);
  overflow: hidden;
}

.system-board {
  position: absolute;
  inset: 8% 8% 10%;
}

.node {
  position: absolute;
  min-width: 118px;
  padding: 0.85rem 1rem;
  border: 1px solid rgba(244, 246, 248, 0.18);
  background: rgba(244, 246, 248, 0.06);
  color: #f4f6f8;
  backdrop-filter: blur(6px);
  animation: floatNode 6s ease-in-out infinite;
}

.node span {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(244, 246, 248, 0.55);
  margin-bottom: 0.2rem;
}

.node strong {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
}

.node-a { top: 8%; left: 4%; animation-delay: 0s; }
.node-b { top: 6%; right: 8%; animation-delay: 0.6s; }
.node-c { top: 38%; left: 38%; animation-delay: 1.1s; border-color: rgba(184, 74, 31, 0.55); background: rgba(184, 74, 31, 0.18); }
.node-d { bottom: 12%; left: 6%; animation-delay: 0.3s; }
.node-e { bottom: 10%; right: 6%; animation-delay: 1.4s; }

.wires {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.wires path {
  fill: none;
  stroke: rgba(244, 246, 248, 0.28);
  stroke-width: 1.5;
  stroke-dasharray: 8 10;
  animation: dashMove 14s linear infinite;
}

.section {
  padding: clamp(4rem, 9vw, 7rem) clamp(1.2rem, 4vw, 3rem);
}

.section-head {
  max-width: 640px;
  margin-bottom: 2.5rem;
}

.section-head h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.05;
}

.section-head p,
.steps p,
.service-grid p {
  color: var(--muted);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem 2rem;
  border-top: 1px solid var(--line);
}

.service-grid article {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--line);
}

.service-grid h3 {
  margin: 0 0 0.55rem;
  font-size: 1.25rem;
}

.service-grid p {
  margin: 0;
}

.approach {
  background: linear-gradient(180deg, transparent, rgba(223, 229, 236, 0.7));
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.steps li {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 1rem;
  align-items: start;
  padding: 1.1rem 0;
  border-top: 1px solid var(--line);
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.steps li.visible {
  opacity: 1;
  transform: none;
}

.steps span {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
}

.steps h3 {
  margin: 0 0 0.35rem;
  font-size: 1.2rem;
}

.steps p {
  margin: 0;
}

.contact {
  padding-top: 2rem;
}

.contact-panel {
  max-width: 760px;
  margin: 0 auto;
  padding: clamp(1.75rem, 4vw, 2.75rem);
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.contact-panel h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  line-height: 1.1;
}

.contact-panel > p {
  margin: 0 0 1.5rem;
  color: var(--muted);
  max-width: 46ch;
}

.contact-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.contact-form label {
  display: grid;
  gap: 0.4rem;
  font-size: 0.9rem;
  font-weight: 500;
}

.contact-form .full,
.contact-form button {
  grid-column: 1 / -1;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.8);
  color: var(--ink);
  padding: 0.8rem 0.9rem;
  border-radius: 4px;
  font: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid rgba(184, 74, 31, 0.35);
  border-color: var(--accent);
}

.alt-contact {
  margin: 1.25rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.alt-contact a {
  color: var(--accent);
  border-bottom: 1px solid currentColor;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1.5rem clamp(1.2rem, 4vw, 3rem) 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

@keyframes floatNode {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

@keyframes dashMove {
  to {
    stroke-dashoffset: -180;
  }
}

@media (max-width: 960px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero-copy {
    padding-top: 2.5rem;
    padding-bottom: 2rem;
  }

  .hero h1 {
    max-width: none;
  }

  .hero-visual {
    min-height: 360px;
  }

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

@media (max-width: 640px) {
  .nav a:not(.nav-cta) {
    display: none;
  }

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

  .contact-form {
    grid-template-columns: 1fr;
  }

  .steps li {
    grid-template-columns: 48px 1fr;
  }
}