/* Synhertz Tech — company site */
:root {
  --ink: #0b1020;
  --ink-soft: #151c2e;
  --mist: #e8eef7;
  --mist-dim: #b7c3d8;
  --signal: #1aa6a0;
  --signal-bright: #3ecfc6;
  --line: rgba(232, 238, 247, 0.12);
  --max: 1080px;
  --font-display: "Syne", "Zen Kaku Gothic New", sans-serif;
  --font-body: "Source Sans 3", "Zen Kaku Gothic New", "Hiragino Sans", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--mist);
  background: var(--ink);
  line-height: 1.65;
  font-size: 1.05rem;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--signal-bright); text-underline-offset: 0.18em; }
a:hover { color: #fff; }

.site-header {
  position: absolute;
  inset: 0 0 auto;
  z-index: 20;
}
.site-header-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.1rem 1.35rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.03em;
  color: #fff;
  text-decoration: none;
}
.logo span {
  color: var(--signal-bright);
  font-weight: 600;
}
.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem 1.15rem;
  font-size: 0.92rem;
}
.nav a {
  color: var(--mist-dim);
  text-decoration: none;
  font-weight: 500;
}
.nav a:hover,
.nav a[aria-current="page"] { color: #fff; }
.lang-switch {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
  margin-left: 0.25rem;
}
.lang-switch a {
  padding: 0.25rem 0.65rem;
  color: var(--mist-dim);
  text-decoration: none;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
}
.lang-switch a[aria-current="true"] {
  background: rgba(26, 166, 160, 0.22);
  color: #fff;
}

.hero {
  position: relative;
  min-height: min(100vh, 860px);
  display: grid;
  align-items: end;
  padding: 7.5rem 1.35rem 4.5rem;
  isolation: isolate;
}
.hero-visual {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 70% 55% at 70% 20%, rgba(26, 166, 160, 0.28), transparent 60%),
    radial-gradient(ellipse 50% 40% at 15% 80%, rgba(62, 100, 200, 0.18), transparent 55%),
    linear-gradient(165deg, #070b16 0%, #0b1020 45%, #10182b 100%);
  overflow: hidden;
}
.hero-visual svg {
  position: absolute;
  inset: auto 0 8% 0;
  width: 140%;
  left: -20%;
  opacity: 0.55;
  animation: wave-drift 18s ease-in-out infinite alternate;
}
@keyframes wave-drift {
  from { transform: translateX(0) translateY(0); }
  to { transform: translateX(-4%) translateY(-1.5%); }
}
.hero-inner {
  max-width: var(--max);
  margin: 0 auto;
  width: 100%;
}
.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 8vw, 5.2rem);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 0.95;
  margin: 0 0 1.1rem;
  color: #fff;
  animation: rise 0.9s ease-out both;
}
.hero-brand em {
  font-style: normal;
  color: var(--signal-bright);
}
.hero-lead {
  max-width: 28rem;
  margin: 0 0 1.75rem;
  color: var(--mist-dim);
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  animation: rise 0.9s ease-out 0.12s both;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  animation: rise 0.9s ease-out 0.22s both;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: none; }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 1.25rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform 0.18s ease, background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--signal);
  color: #041312;
}
.btn-primary:hover {
  background: var(--signal-bright);
  color: #041312;
}
.btn-ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(232, 238, 247, 0.28);
}
.btn-ghost:hover {
  border-color: #fff;
  color: #fff;
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 4.5rem 1.35rem;
}
.section h2 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.5vw, 2.35rem);
  letter-spacing: -0.03em;
  margin: 0 0 0.75rem;
  color: #fff;
}
.section-lead {
  margin: 0 0 2rem;
  max-width: 36rem;
  color: var(--mist-dim);
}
.band {
  background: var(--ink-soft);
  border-block: 1px solid var(--line);
}

.service-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.75rem;
}
@media (min-width: 800px) {
  .service-list { grid-template-columns: 1fr 1fr; gap: 2rem 2.5rem; }
}
.service-list li {
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}
.service-list strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 0.45rem;
}
.service-list p {
  margin: 0;
  color: var(--mist-dim);
}

.product-link {
  display: block;
  padding: 1.35rem 0;
  border-top: 1px solid var(--line);
  text-decoration: none;
  color: inherit;
}
.product-link strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: #fff;
  margin-bottom: 0.35rem;
}
.product-link span { color: var(--mist-dim); }
a.product-link {
  transition: color 0.18s ease;
}
a.product-link:hover { color: #fff; }
a.product-link:hover strong { color: var(--signal-bright); }

.about-grid {
  display: grid;
  gap: 1rem 2rem;
}
@media (min-width: 720px) {
  .about-grid { grid-template-columns: 10rem 1fr; }
}
.about-grid dt {
  color: var(--mist-dim);
  font-size: 0.9rem;
  margin: 0;
}
.about-grid dd {
  margin: 0 0 0.85rem;
  color: #fff;
}

.contact-panel {
  max-width: 32rem;
}
.contact-panel p { color: var(--mist-dim); }
.contact-mail {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: #fff;
  text-decoration: none;
  border-bottom: 1px solid rgba(62, 207, 198, 0.45);
}
.contact-mail:hover {
  color: var(--signal-bright);
  border-color: var(--signal-bright);
}

.page-hero {
  padding: 7rem 1.35rem 2rem;
  background:
    radial-gradient(ellipse 55% 50% at 80% 0%, rgba(26, 166, 160, 0.2), transparent 60%),
    var(--ink);
}
.page-hero-inner {
  max-width: var(--max);
  margin: 0 auto;
}
.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  letter-spacing: -0.035em;
  margin: 0 0 0.6rem;
  color: #fff;
}
.page-hero p {
  margin: 0;
  max-width: 34rem;
  color: var(--mist-dim);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem 1.35rem 2.5rem;
}
.site-footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  color: var(--mist-dim);
  font-size: 0.88rem;
}
.site-footer a {
  color: var(--mist-dim);
  text-decoration: none;
}
.site-footer a:hover { color: #fff; }

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}