/* UGOODU — lean tech marketing styles */
:root {
  --bg: #060d18;
  --bg-deep: #03070f;
  --surface: #0c1829;
  --surface-2: #122338;
  --line: rgba(62, 203, 255, 0.14);
  --line-strong: rgba(62, 203, 255, 0.32);
  --cyan: #3ecbff;
  --cyan-2: #1ad4c0;
  --steel: #9eb0c4;
  --text: #eef4fb;
  --muted: #8b9db3;
  --white: #ffffff;
  --danger: #ff5c6c;
  --radius: 4px;
  --max: 1120px;
  --header-h: 72px;
  --font: "Bahnschrift", "Segoe UI Variable Display", "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg-deep);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

button {
  font: inherit;
  border: 0;
  background: none;
  cursor: pointer;
  color: inherit;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Atmosphere */
.site-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(62, 203, 255, 0.18), transparent 55%),
    radial-gradient(ellipse 50% 40% at 90% 20%, rgba(26, 212, 192, 0.08), transparent 50%),
    radial-gradient(ellipse 40% 35% at 10% 70%, rgba(62, 203, 255, 0.06), transparent 55%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
}

.site-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(62, 203, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(62, 203, 255, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 20%, transparent 75%);
  animation: grid-drift 28s linear infinite;
}

@keyframes grid-drift {
  from { transform: translateY(0); }
  to { transform: translateY(64px); }
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  backdrop-filter: blur(14px);
  background: rgba(6, 13, 24, 0.78);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(3, 7, 15, 0.9);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.brand img {
  height: 48px;
  width: auto;
  max-width: 140px;
  object-fit: contain;
  mix-blend-mode: lighten;
}

.nav-desktop {
  display: none;
  align-items: center;
  gap: 0.25rem;
}

.nav-desktop a {
  padding: 0.5rem 0.9rem;
  color: var(--steel);
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  transition: color 0.2s var(--ease);
}

.nav-desktop a:hover,
.nav-desktop a:focus-visible {
  color: var(--cyan);
}

.nav-cta {
  display: none;
}

.menu-toggle {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  position: relative;
  transition: transform 0.25s var(--ease);
}

.menu-toggle span::before,
.menu-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
}

.menu-toggle span::before { top: -6px; }
.menu-toggle span::after { top: 6px; }

.menu-toggle[aria-expanded="true"] span {
  background: transparent;
}

.menu-toggle[aria-expanded="true"] span::before {
  top: 0;
  transform: rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span::after {
  top: 0;
  transform: rotate(-45deg);
}

.nav-mobile {
  display: none;
  border-top: 1px solid var(--line);
  background: rgba(3, 7, 15, 0.98);
  padding: 0.75rem 0 1.25rem;
}

.nav-mobile.is-open {
  display: block;
}

.nav-mobile a {
  display: block;
  padding: 0.85rem 1rem;
  color: var(--steel);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

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

.nav-mobile .btn {
  margin: 1rem 1rem 0;
  width: calc(100% - 2rem);
  text-align: center;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease);
}

.btn-primary {
  background: linear-gradient(135deg, var(--cyan) 0%, var(--cyan-2) 100%);
  color: #031018;
  box-shadow: 0 0 0 1px rgba(62, 203, 255, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(62, 203, 255, 0.25);
}

.btn-ghost {
  border: 1px solid var(--line-strong);
  color: var(--text);
  background: rgba(62, 203, 255, 0.04);
}

.btn-ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-2px);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Hero */
.hero {
  position: relative;
  min-height: calc(100svh - var(--header-h));
  display: flex;
  align-items: center;
  padding: 3rem 0 4.5rem;
  overflow: hidden;
}

.hero-visual {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.hero-visual::before {
  content: "";
  position: absolute;
  width: min(70vw, 720px);
  aspect-ratio: 1;
  right: -8%;
  top: 10%;
  border: 1px solid var(--line);
  border-radius: 50%;
  opacity: 0.55;
  animation: pulse-ring 6s var(--ease) infinite;
}

.hero-visual::after {
  content: "";
  position: absolute;
  width: min(50vw, 480px);
  aspect-ratio: 1;
  right: 4%;
  top: 22%;
  border: 1px solid rgba(26, 212, 192, 0.2);
  border-radius: 50%;
  opacity: 0.4;
  animation: pulse-ring 6s 1.2s var(--ease) infinite;
}

@keyframes pulse-ring {
  0%, 100% { transform: scale(1); opacity: 0.45; }
  50% { transform: scale(1.04); opacity: 0.75; }
}

.hero-scan {
  position: absolute;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(
    180deg,
    transparent,
    rgba(62, 203, 255, 0.05),
    transparent
  );
  animation: scan 8s linear infinite;
  opacity: 0.7;
}

@keyframes scan {
  from { top: -10%; }
  to { top: 110%; }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-brand {
  margin-bottom: 1.75rem;
  animation: rise 0.8s var(--ease) both;
}

.hero-brand img {
  height: clamp(72px, 14vw, 110px);
  width: auto;
  filter: drop-shadow(0 8px 24px rgba(62, 203, 255, 0.25));
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.75rem, 4.5vw, 2.75rem);
  line-height: 1.25;
  font-weight: 650;
  letter-spacing: 0.02em;
  animation: rise 0.8s 0.1s var(--ease) both;
}

.hero h1 em {
  font-style: normal;
  background: linear-gradient(90deg, var(--cyan), var(--cyan-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  margin: 0 0 2rem;
  max-width: 36rem;
  color: var(--steel);
  font-size: clamp(1rem, 2.2vw, 1.15rem);
  animation: rise 0.8s 0.2s var(--ease) both;
}

.hero .btn-group {
  animation: rise 0.8s 0.3s var(--ease) both;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Sections */
.section {
  padding: 5rem 0;
  position: relative;
}

.section-head {
  margin-bottom: 2.5rem;
  max-width: 40rem;
}

.section-head.center {
  margin-inline: auto;
  text-align: center;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 0.75rem;
  color: var(--cyan-2);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.section-head h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.5rem, 3.5vw, 2.1rem);
  line-height: 1.3;
  letter-spacing: 0.02em;
}

.section-head p {
  margin: 0;
  color: var(--muted);
}

/* Services — interaction grid, not card-heavy */
.service-grid {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.service-item {
  background: var(--surface);
  padding: 1.75rem 1.5rem;
  transition: background 0.3s var(--ease);
}

.service-item:hover {
  background: var(--surface-2);
}

.service-icon {
  width: 42px;
  height: 42px;
  margin-bottom: 1.1rem;
  color: var(--cyan);
}

.service-icon svg {
  width: 100%;
  height: 100%;
}

.service-item h3 {
  margin: 0 0 0.6rem;
  font-size: 1.15rem;
  letter-spacing: 0.03em;
}

.service-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Capabilities strip */
.cap-list {
  display: grid;
  gap: 0.75rem;
  margin-top: 2rem;
}

.cap-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
  padding: 1rem 0;
  border-top: 1px solid var(--line);
}

.cap-item:last-child {
  border-bottom: 1px solid var(--line);
}

.cap-num {
  color: var(--cyan);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
  font-size: 0.85rem;
  padding-top: 0.2rem;
}

.cap-item h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.cap-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

/* Product */
.product {
  background:
    linear-gradient(180deg, transparent, rgba(62, 203, 255, 0.03), transparent);
}

.product-panel {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.product-copy h2 {
  margin: 0 0 0.85rem;
  font-size: clamp(1.45rem, 3.2vw, 2rem);
}

.product-copy p {
  margin: 0 0 1.25rem;
  color: var(--muted);
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.feature-tags span {
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--line);
  color: var(--steel);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}

.product-media {
  position: relative;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  padding: 0.75rem;
  border-radius: 8px;
  overflow: hidden;
}

.product-media::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(62, 203, 255, 0.08), transparent 40%);
  pointer-events: none;
}

.product-media img {
  width: 100%;
  border-radius: 4px;
  position: relative;
  z-index: 1;
}

/* Contact */
.contact {
  border-top: 1px solid var(--line);
}

.contact-grid {
  display: grid;
  gap: 2rem;
}

.contact-main h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.5rem, 3.5vw, 2.1rem);
}

.contact-main p {
  margin: 0 0 1.5rem;
  color: var(--muted);
  max-width: 32rem;
}

.contact-meta {
  display: grid;
  gap: 1.25rem;
}

.meta-block h3 {
  margin: 0 0 0.4rem;
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan-2);
}

.meta-block p,
.meta-block a {
  margin: 0;
  color: var(--steel);
}

.meta-block a:hover {
  color: var(--cyan);
}

.contact-aside {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.85rem;
  max-width: 340px;
}

.qr-wrap {
  width: 100%;
  padding: 0.65rem;
  background: var(--white);
  border-radius: 8px;
  border: 1px solid var(--line);
}

.qr-wrap img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 4px;
}

.qr-note {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.5;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0 2rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
}

.footer-inner p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.footer-inner a {
  color: var(--steel);
}

.footer-inner a:hover {
  color: var(--cyan);
}

.footer-social {
  display: flex;
  gap: 1rem;
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

/* Back to top */
.to-top {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 90;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background: rgba(12, 24, 41, 0.9);
  color: var(--cyan);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
}

.to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

/* Responsive */
@media (min-width: 768px) {
  .service-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .cap-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 0 2rem;
  }

  .product-panel {
    grid-template-columns: 1fr 1.05fr;
    gap: 3rem;
  }

  .contact-grid {
    grid-template-columns: 1.3fr 0.7fr;
    align-items: start;
  }
}

@media (min-width: 992px) {
  .nav-desktop,
  .nav-cta {
    display: flex;
  }

  .menu-toggle {
    display: none;
  }

  .service-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .site-bg::before,
  .hero-scan,
  .hero-visual::before,
  .hero-visual::after {
    animation: none;
  }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .hero-brand,
  .hero h1,
  .hero-lead,
  .hero .btn-group {
    animation: none;
  }
}