/* Nox marketing site — soft low-light minimalism (AppTheme-aligned) */

:root {
  --nox-bg: #0b0c0e;
  --nox-bg-mid: #0e0f12;
  --nox-surface: #15161a;
  --nox-surface-raised: #1d1e23;
  --nox-card: rgba(255, 255, 255, 0.035);
  --nox-card-hover: rgba(255, 255, 255, 0.055);
  --nox-border: rgba(255, 255, 255, 0.07);
  --nox-border-soft: rgba(255, 255, 255, 0.04);
  --nox-text: #f5f7fa;
  --nox-text-secondary: rgba(255, 255, 255, 0.52);
  --nox-text-muted: rgba(255, 255, 255, 0.32);
  --nox-accent: #d2e0ff;
  --nox-accent-soft: rgba(210, 224, 255, 0.72);
  --nox-coral: rgba(211, 108, 122, 0.55);
  --nox-glow: rgba(236, 238, 242, 0.07);
  --nox-glow-2: rgba(255, 255, 255, 0.03);
  --nox-radius-xl: 28px;
  --nox-radius: 22px;
  --nox-radius-sm: 16px;
  --nox-radius-xs: 12px;
  --nox-max: 1120px;
  --nox-content: 680px;
  --nox-font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Hiragino Sans",
    "Apple SD Gothic Neo", sans-serif;
  --nox-shadow-card: 0 24px 48px rgba(0, 0, 0, 0.28), 0 0 0 1px var(--nox-border-soft);
  --nox-shadow-hero: 0 32px 80px rgba(0, 0, 0, 0.45);
  --header-h: 72px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
}

body {
  margin: 0;
  font-family: var(--nox-font);
  font-size: 17px;
  line-height: 1.6;
  color: var(--nox-text);
  background: var(--nox-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--nox-accent-soft);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color 0.2s ease;
}

a:hover {
  color: #fff;
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  padding: 0.75rem 1rem;
  border-radius: var(--nox-radius-xs);
  background: var(--nox-surface);
  color: var(--nox-text);
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

/* —— Atmosphere —— */

.ambient {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
  background: linear-gradient(
    145deg,
    var(--nox-bg) 0%,
    var(--nox-bg-mid) 42%,
    #0a0b0d 100%
  );
}

.ambient::before,
.ambient::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
}

.ambient::before {
  top: -18%;
  left: 50%;
  width: min(820px, 95vw);
  height: min(620px, 70vh);
  transform: translateX(-50%);
  background: radial-gradient(circle, var(--nox-glow) 0%, transparent 70%);
}

.ambient::after {
  bottom: 8%;
  right: -8%;
  width: min(480px, 60vw);
  height: min(380px, 45vh);
  background: radial-gradient(circle, var(--nox-glow-2) 0%, transparent 72%);
  opacity: 0.9;
}

/* —— Header —— */

.site-shell {
  position: relative;
  z-index: 1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, background 0.25s ease, backdrop-filter 0.25s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--nox-border-soft);
  background: rgba(11, 12, 14, 0.72);
  backdrop-filter: blur(18px) saturate(1.2);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
}

.header-inner {
  width: 100%;
  max-width: var(--nox-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.lang-link {
  padding: 0.34rem 0.55rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--nox-text-muted);
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.lang-link:hover {
  color: var(--nox-text);
}

.lang-link.is-active {
  color: var(--nox-text);
  border-color: var(--nox-border-soft);
  background: rgba(255, 255, 255, 0.04);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--nox-text);
}

.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  flex-shrink: 0;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
}

.brand-mark {
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, rgba(228, 236, 255, 0.95), rgba(255, 255, 255, 0.62));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.58rem 1.15rem;
  border-radius: 999px;
  border: 1px solid var(--nox-border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--nox-text);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.nav-cta:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.12);
  color: #fff;
  transform: translateY(-1px);
}

/* —— Layout —— */

.wrap {
  max-width: var(--nox-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2rem) 5rem;
}

.section-block {
  padding: clamp(3rem, 7vw, 5rem) 0;
}

.section-block + .section-block {
  border-top: 1px solid var(--nox-border-soft);
}

.section-head {
  margin-bottom: clamp(1.75rem, 4vw, 2.5rem);
  max-width: 42rem;
}

.section-head.centered {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-eyebrow {
  display: inline-block;
  margin: 0;
  padding: 0.32rem 0.72rem;
  border-radius: 999px;
  border: 1px solid var(--nox-border-soft);
  background: rgba(255, 255, 255, 0.03);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--nox-text-muted);
}

.section-head .section-eyebrow + h2 {
  margin-top: 1.75rem;
}

.section-head h2 {
  margin: 0 0 0.65rem;
  font-size: clamp(1.65rem, 4vw, 2.35rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.15;
}

.section-head p {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--nox-text-secondary);
}

.about-body {
  margin-top: 1rem;
  max-width: 38rem;
}

.section-head.centered .about-body {
  margin-left: auto;
  margin-right: auto;
}

/* —— Hero —— */

.hero {
  padding: clamp(2rem, 6vw, 4rem) 0 clamp(3rem, 8vw, 5rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: center;
}

@media (min-width: 900px) {
  .hero-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 3rem;
  }
}

.hero-copy {
  text-align: center;
}

@media (min-width: 900px) {
  .hero-copy {
    text-align: left;
  }
}

.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 1.25rem;
}

@media (min-width: 900px) {
  .hero-pills {
    justify-content: flex-start;
  }
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 0.38rem 0.78rem;
  border-radius: 999px;
  border: 1px solid var(--nox-border-soft);
  background: rgba(255, 255, 255, 0.03);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--nox-text-secondary);
  letter-spacing: 0.02em;
}

.hero h1 {
  margin: 0 0 1.1rem;
  font-size: clamp(2.35rem, 6.5vw, 3.75rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1.08;
}

.hero h1 .hero-accent {
  display: block;
  margin-top: 0.15em;
  background: linear-gradient(120deg, #eef2ff 0%, rgba(210, 224, 255, 0.75) 45%, rgba(255, 255, 255, 0.55) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  margin: 0 auto 2rem;
  max-width: 34rem;
  font-size: clamp(1.02rem, 2.2vw, 1.15rem);
  line-height: 1.7;
  color: var(--nox-text-secondary);
}

@media (min-width: 900px) {
  .hero-lead {
    margin-left: 0;
    margin-right: 0;
  }
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

@media (min-width: 900px) {
  .hero-actions {
    justify-content: flex-start;
  }
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.9rem 1.45rem;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.16) 0%, rgba(255, 255, 255, 0.07) 100%);
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.25);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn-primary:hover {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.22) 0%, rgba(255, 255, 255, 0.1) 100%);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.32);
}

.btn-primary svg {
  width: 18px;
  height: 18px;
  opacity: 0.92;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: 0.9rem 1.3rem;
  border-radius: 999px;
  border: 1px solid var(--nox-border);
  background: transparent;
  color: var(--nox-text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.btn-secondary:hover {
  color: var(--nox-text);
  border-color: rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-icon-shell {
  position: relative;
  width: min(280px, 72vw);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
}

.hero-icon-shell::before {
  content: "";
  position: absolute;
  inset: 8%;
  border-radius: 50%;
  background: radial-gradient(circle, var(--nox-glow) 0%, transparent 68%);
  filter: blur(8px);
}

.hero-icon-frame {
  position: relative;
  width: 58%;
  aspect-ratio: 1;
  padding: 3px;
  border-radius: 50%;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0.04));
  box-shadow: var(--nox-shadow-hero);
}

.hero-icon-frame img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}

.hero-orbit {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.06);
  animation: orbit-drift 18s ease-in-out infinite;
}

.hero-orbit--2 {
  inset: 12%;
  border-color: rgba(255, 255, 255, 0.04);
  animation-duration: 24s;
  animation-direction: reverse;
}

@keyframes orbit-drift {
  0%, 100% { transform: rotate(0deg) scale(1); opacity: 0.7; }
  50% { transform: rotate(4deg) scale(1.02); opacity: 1; }
}

/* —— Feature cards —— */

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

@media (min-width: 720px) {
  .card-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.15rem;
  }
}

.card {
  position: relative;
  padding: 1.5rem 1.45rem 1.55rem;
  border-radius: var(--nox-radius);
  background: var(--nox-card);
  border: 1px solid var(--nox-border-soft);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.card:hover {
  background: var(--nox-card-hover);
  border-color: var(--nox-border);
  transform: translateY(-3px);
}

.card-icon {
  width: 44px;
  height: 44px;
  margin-bottom: 1.1rem;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--nox-border-soft);
  color: var(--nox-accent);
}

.card-icon svg {
  width: 22px;
  height: 22px;
}

.card h3 {
  margin: 0 0 0.55rem;
  font-size: 1.12rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.card p {
  margin: 0;
  color: var(--nox-text-secondary);
  font-size: 0.96rem;
  line-height: 1.62;
}

/* —— Steps —— */

.steps {
  display: grid;
  gap: 1rem;
}

@media (min-width: 900px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.15rem;
    align-items: stretch;
  }
}

.step {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  padding: 1.45rem 1.4rem 1.5rem;
  border-radius: var(--nox-radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.045) 0%, rgba(255, 255, 255, 0.02) 100%);
  border: 1px solid var(--nox-border-soft);
  box-shadow: var(--nox-shadow-card);
}

.step-num {
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--nox-text);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--nox-border);
  flex-shrink: 0;
}

.step h3 {
  margin: 0 0 0.4rem;
  font-size: 1.08rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.step p {
  margin: 0;
  color: var(--nox-text-secondary);
  font-size: 0.95rem;
  line-height: 1.62;
}

/* —— FAQ —— */

.faq-list {
  display: grid;
  gap: 0.85rem;
  max-width: 52rem;
}

.faq-item {
  padding: 1.25rem 1.35rem;
  border-radius: var(--nox-radius-sm);
  background: var(--nox-card);
  border: 1px solid var(--nox-border-soft);
  transition: border-color 0.2s ease;
}

.faq-item:hover {
  border-color: var(--nox-border);
}

.faq-item h3 {
  margin: 0 0 0.5rem;
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: -0.015em;
}

.faq-item p {
  margin: 0;
  color: var(--nox-text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* —— Footer —— */

.site-footer {
  position: relative;
  z-index: 1;
  margin-top: 1rem;
  padding: clamp(2.5rem, 5vw, 3.5rem) clamp(1.25rem, 4vw, 2rem) 2.75rem;
  border-top: 1px solid var(--nox-border-soft);
  background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.22) 100%);
}

.footer-inner {
  max-width: var(--nox-max);
  margin: 0 auto;
  display: grid;
  gap: 1.75rem;
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--nox-text);
}

.footer-brand img {
  width: 28px;
  height: 28px;
  border-radius: 7px;
}

.footer-brand span {
  font-weight: 600;
  letter-spacing: -0.02em;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  font-size: 0.9rem;
}

.footer-legal a {
  color: var(--nox-text-secondary);
  text-decoration: none;
}

.footer-legal a:hover {
  color: var(--nox-text);
  text-decoration: underline;
}

.footer-meta {
  margin: 0;
  color: var(--nox-text-muted);
  font-size: 0.84rem;
  line-height: 1.55;
}

.footer-specs {
  margin: 0;
  color: var(--nox-text-muted);
  font-size: 0.82rem;
  line-height: 1.65;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
}

.footer-bottom .footer-specs {
  flex: 1 1 16rem;
}

.footer-bottom .footer-meta {
  flex: 0 0 auto;
  text-align: right;
  white-space: nowrap;
}

@media (max-width: 720px) {
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-bottom .footer-meta {
    text-align: left;
    white-space: normal;
  }
}

.noscript-note {
  max-width: var(--nox-max);
  margin: 0 auto;
  padding: 0.85rem clamp(1.25rem, 4vw, 2rem);
  color: var(--nox-text-muted);
  font-size: 0.86rem;
}

.noscript-note code {
  padding: 0.12rem 0.38rem;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
  font-size: 0.82em;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero-orbit {
    animation: none;
  }

  .card:hover,
  .btn-primary:hover,
  .nav-cta:hover {
    transform: none;
  }
}

@media (max-width: 640px) {
  :root {
    --header-h: 64px;
  }

  .lang-switch {
    display: none;
  }

  .hero-icon-shell {
    width: min(220px, 68vw);
  }
}