/* ============================================================
   NihuCation — styles.css
   Archetype: Dark Tech Glass — yellow/black brand
   ============================================================ */

/* --- Reset & Base ----------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:          #08080d;
  --bg-2:        #0e0e1a;
  --bg-3:        #14141f;
  --bg-card:     rgba(255,255,255,0.035);
  --ink:         #f0f0f5;
  --ink-soft:    #b8b8cc;
  --ink-mute:    #6868a0;
  --accent:      #FFD900;
  --accent-2:    #FFC200;
  --accent-glow: rgba(255,217,0,0.18);
  --accent-dim:  rgba(255,217,0,0.08);
  --line:        rgba(255,217,0,0.1);
  --line-w:      rgba(255,255,255,0.06);
  --radius:      16px;
  --radius-lg:   24px;
  --nav-h:       72px;
  --ease-out:    cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

html {
  overflow-x: clip;
  scroll-behavior: smooth;
  font-size: 16px;
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* --- Typography ------------------------------------------- */
.display, h1, h2, h3, h4 {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 700;
}

/* --- Layout ----------------------------------------------- */
.container {
  width: min(1200px, 100% - 3rem);
  margin-inline: auto;
}

/* --- Splash ----------------------------------------------- */
.splash {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
  animation: splashSafety .01s 4.5s forwards;
}
@keyframes splashSafety { to { opacity: 0; pointer-events: none; } }
.splash.is-out {
  opacity: 0;
  pointer-events: none;
  transform: scale(1.04);
}
.splash-inner { display: flex; flex-direction: column; align-items: center; gap: 2rem; }
.splash-logo {
  width: 120px;
  height: 120px;
  object-fit: contain;
  animation: splashPulse 1.4s var(--ease-in-out) infinite;
}
@keyframes splashPulse { 0%,100% { transform: scale(1); } 50% { transform: scale(1.06); } }
.splash-bar {
  width: 160px;
  height: 3px;
  background: var(--line-w);
  border-radius: 99px;
  overflow: hidden;
}
.splash-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 99px;
  animation: splashLoad 1.8s var(--ease-out) forwards;
}
@keyframes splashLoad { from { width: 0 } to { width: 100% } }

/* --- Navigation ------------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: transparent;
  transition: background 0.4s, border-color 0.4s, backdrop-filter 0.4s;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(8,8,13,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--line-w);
}
.nav-inner {
  width: min(1200px, 100% - 3rem);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  transition: opacity 0.2s;
}
.nav-logo:hover { opacity: 0.8; }
.nav-logo-img { width: 40px; height: 40px; object-fit: contain; }
.nav-logo-text { color: var(--ink); }

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.nav-link {
  padding: 0.5rem 0.9rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-soft);
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}
.nav-link:hover { color: var(--ink); background: var(--line-w); }
.nav-cta {
  margin-left: 0.5rem;
  padding: 0.55rem 1.25rem;
  background: var(--accent);
  color: #000;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 99px;
  transition: background 0.2s, transform 0.2s;
}
.nav-cta:hover { background: var(--accent-2); transform: translateY(-1px); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: 8px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --- Buttons ---------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  border-radius: 99px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.25s var(--ease-out);
  cursor: pointer;
  white-space: nowrap;
  text-align: center;
}
.btn-primary {
  background: var(--accent);
  color: #000;
}
.btn-primary:hover { background: var(--accent-2); transform: translateY(-2px); box-shadow: 0 8px 32px var(--accent-glow); }
.btn-ghost {
  background: var(--line-w);
  color: var(--ink);
  border: 1px solid var(--line-w);
}
.btn-ghost:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.15); transform: translateY(-2px); }
.btn-accent {
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--line);
}
.btn-accent:hover { background: var(--accent); color: #000; }
.btn-sm { padding: 0.6rem 1.4rem; font-size: 0.875rem; }
.btn-disabled { opacity: 0.45; cursor: not-allowed; pointer-events: none; }
.btn-download {
  flex-direction: column;
  gap: 0.2rem;
  padding: 1rem 2rem;
}
.btn-sub { font-size: 0.75rem; font-weight: 400; opacity: 0.7; }

/* --- Reveal animations ------------------------------------ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
/* Defensive: prevent split+reveal conflict */
.reveal[data-split] {
  opacity: 1;
  transform: none;
}
.split-word {
  display: inline-block;
  overflow: hidden;
}
.split-word span {
  display: inline-block;
  transform: translateY(110%);
  transition: transform 0.65s var(--ease-out);
}
.is-revealed .split-word span { transform: none; }

/* --- Section commons -------------------------------------- */
section { padding-block: 7rem 6rem; }
.section-header {
  text-align: center;
  max-width: 680px;
  margin-inline: auto;
  margin-bottom: 4rem;
}
.section-kicker {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.section-title {
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.1;
  margin-bottom: 1.25rem;
  text-wrap: balance;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--ink-soft);
  line-height: 1.7;
  text-wrap: balance;
}

/* --- Hero ------------------------------------------------- */
.hero {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-block: calc(var(--nav-h) + 4rem) 5rem;
}
.hero-glow {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(255,217,0,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line-w) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-w) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 0%, transparent 80%);
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: var(--accent-dim);
  border: 1px solid var(--line);
  border-radius: 99px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}
.hero-title {
  font-size: clamp(2.8rem, 6vw, 5.5rem);
  line-height: 1.05;
  text-wrap: balance;
  max-width: 16ch;
}
.hero-accent {
  color: var(--accent);
  font-style: italic;
}
.hero-desc {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  color: var(--ink-soft);
  max-width: 52ch;
  line-height: 1.7;
  text-wrap: balance;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}
.hero-platforms {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}
.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.9rem;
  background: var(--line-w);
  border: 1px solid var(--line-w);
  border-radius: 99px;
  font-size: 0.8rem;
  color: var(--ink-soft);
}
.hero-scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollBounce 2s ease-in-out infinite;
}
@keyframes scrollBounce { 0%,100% { transform: scaleY(1); opacity:1; } 50% { transform: scaleY(0.6); opacity:0.4; } }

/* --- Stats Band ------------------------------------------- */
.stats-band {
  padding-block: 3rem;
  background: var(--bg-2);
  border-block: 1px solid var(--line-w);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}
.stat-num {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  letter-spacing: -0.03em;
}
.stat-label {
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-top: 0.5rem;
  display: block;
}

/* --- Features --------------------------------------------- */
.features { background: var(--bg); }
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--line-w);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: border-color 0.3s, background 0.3s, transform 0.3s var(--ease-out);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}
.feature-card:hover { border-color: var(--line); background: rgba(255,217,0,0.04); transform: translateY(-4px); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  font-size: 2.2rem;
  margin-bottom: 1.25rem;
  line-height: 1;
}
.feature-title {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  color: var(--ink);
}
.feature-desc {
  font-size: 0.9rem;
  color: var(--ink-soft);
  line-height: 1.65;
}

/* --- Demo Section ----------------------------------------- */
.demo { background: var(--bg-2); }
.demo-showcase { margin-bottom: 3rem; }
.demo-placeholder {
  border: 2px dashed var(--line);
  border-radius: var(--radius-lg);
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  transition: border-color 0.3s;
}
.demo-placeholder:hover { border-color: rgba(255,217,0,0.3); }
.demo-placeholder-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
  padding: 3rem;
}
.demo-placeholder-icon { font-size: 3rem; line-height: 1; }
.demo-placeholder-text { font-size: 1.1rem; font-weight: 600; color: var(--ink-soft); }
.demo-placeholder-sub { font-size: 0.9rem; color: var(--ink-mute); max-width: 36ch; }
.demo-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.demo-feat {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--line-w);
  border-radius: var(--radius);
}
.demo-feat-icon { font-size: 1.8rem; flex-shrink: 0; }
.demo-feat strong { display: block; font-size: 0.95rem; margin-bottom: 0.3rem; }
.demo-feat p { font-size: 0.85rem; color: var(--ink-soft); }

/* --- Downloads -------------------------------------------- */
.downloads { background: var(--bg); }
.downloads-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  max-width: 720px;
  margin-inline: auto;
  margin-bottom: 2rem;
}
.download-card {
  background: var(--bg-card);
  border: 1px solid var(--line-w);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  transition: border-color 0.3s, transform 0.3s var(--ease-out);
}
.download-card:hover { border-color: var(--line); transform: translateY(-4px); }
.download-icon { font-size: 3rem; line-height: 1; }
.download-platform {
  font-size: 1.3rem;
  font-weight: 700;
}
.download-req {
  font-size: 0.82rem;
  color: var(--ink-mute);
}
.download-note {
  text-align: center;
  font-size: 0.85rem;
  color: var(--ink-mute);
  max-width: 52ch;
  margin-inline: auto;
}
.download-note em { color: var(--ink-soft); font-style: normal; font-weight: 500; }

/* --- App Family ------------------------------------------- */
.apps-family { background: var(--bg-2); }
.apps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.app-card {
  background: var(--bg-card);
  border: 1px solid var(--line-w);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: border-color 0.3s, transform 0.3s var(--ease-out);
}
.app-card--active {
  border-color: var(--line);
  background: rgba(255,217,0,0.04);
  position: relative;
  overflow: hidden;
}
.app-card--active::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent);
}
.app-card--soon { opacity: 0.65; }
.app-card:hover { border-color: rgba(255,255,255,0.15); transform: translateY(-4px); }
.app-card--soon:hover { opacity: 0.85; }
.app-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}
.app-icon { font-size: 2rem; line-height: 1; }
.app-badge {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.7rem;
  border-radius: 99px;
}
.app-badge--active { background: rgba(255,217,0,0.15); color: var(--accent); border: 1px solid var(--line); }
.app-badge--soon { background: rgba(255,255,255,0.06); color: var(--ink-mute); border: 1px solid var(--line-w); }
.app-name { font-size: 1.2rem; font-weight: 700; }
.app-tagline { font-size: 0.82rem; color: var(--accent); font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; }
.app-desc { font-size: 0.88rem; color: var(--ink-soft); line-height: 1.6; flex: 1; }

/* --- About ------------------------------------------------ */
.about { background: var(--bg); }
.about-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}
.about-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.about-img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: var(--radius-lg);
}
.about-visual-badge {
  position: absolute;
  bottom: 1.5rem;
  left: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1.2rem;
  background: rgba(8,8,13,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 600;
}
.badge-icon { font-size: 1.2rem; }
.about-text {
  color: var(--ink-soft);
  margin-bottom: 1rem;
  line-height: 1.75;
  font-size: 1rem;
}
.about-values {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.about-values li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
}
.about-values span { color: var(--accent); font-size: 0.7rem; }

/* --- Updates ---------------------------------------------- */
.updates { background: var(--bg-2); }
.updates-timeline {
  max-width: 760px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-bottom: 2rem;
}
.update-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 2rem;
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--line-w);
  border-radius: var(--radius-lg);
  transition: border-color 0.3s;
}
.update-item:hover { border-color: var(--line); }
.update-version {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  padding-top: 0.2rem;
}
.update-meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}
.update-title { font-size: 1.1rem; font-weight: 700; }
.update-date { font-size: 0.82rem; color: var(--ink-mute); }
.update-desc { font-size: 0.9rem; color: var(--ink-soft); margin-bottom: 1rem; }
.update-list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.update-list li {
  font-size: 0.85rem;
  color: var(--ink-mute);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.update-list li::before {
  content: '';
  display: inline-block;
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
}
.updates-note {
  text-align: center;
  font-size: 0.88rem;
  color: var(--ink-mute);
  max-width: 46ch;
  margin-inline: auto;
}

/* --- Contact ---------------------------------------------- */
.contact { background: var(--bg); }
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}
.contact-desc {
  font-size: 1rem;
  color: var(--ink-soft);
  margin-bottom: 2rem;
  line-height: 1.7;
}
.social-links { display: flex; flex-direction: column; gap: 1rem; }
.social-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.25s var(--ease-out);
  width: fit-content;
}
.social-btn svg { width: 22px; height: 22px; flex-shrink: 0; }
.social-btn--fb {
  background: #1877f2;
  color: #fff;
}
.social-btn--fb:hover { background: #1464d8; transform: translateY(-2px); box-shadow: 0 8px 28px rgba(24,119,242,0.35); }
.contact-visual { display: flex; align-items: center; justify-content: center; }
.contact-card {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  text-align: center;
  max-width: 340px;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}
.cc-logo-img { width: 80px; height: 80px; object-fit: contain; margin-inline: auto; }
.cc-text {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.05rem;
  font-weight: 600;
  font-style: italic;
  color: var(--ink-soft);
  line-height: 1.4;
}

/* --- Footer ----------------------------------------------- */
.footer {
  padding-block: 2.5rem;
  background: var(--bg-2);
  border-top: 1px solid var(--line-w);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}
.footer-brand { display: flex; align-items: center; gap: 0.75rem; }
.footer-logo { width: 32px; height: 32px; object-fit: contain; }
.footer-name {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1rem;
}
.footer-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.footer-links a {
  font-size: 0.85rem;
  color: var(--ink-mute);
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--ink); }
.footer-copy { font-size: 0.8rem; color: var(--ink-mute); }

/* --- Mobile ----------------------------------------------- */
@media (max-width: 1023px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .apps-grid { grid-template-columns: 1fr; max-width: 480px; margin-inline: auto; }
  .about-layout { grid-template-columns: 1fr; gap: 3rem; }
  .contact-layout { grid-template-columns: 1fr; gap: 3rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 767px) {
  section { padding-block: 5rem 4rem; }
  .nav-toggle { display: flex; }
  .nav-menu {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(8,8,13,0.97);
    backdrop-filter: blur(24px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.25rem;
    z-index: 99;
    padding: 2rem;
  }
  .nav-menu.is-open { display: flex; }
  .nav-link { font-size: 1.3rem; padding: 0.75rem 1.5rem; }
  .nav-cta { font-size: 1.1rem; padding: 0.85rem 2rem; }

  .hero-title { font-size: clamp(2.2rem, 8vw, 3.5rem); }
  .hero-actions { flex-direction: column; width: 100%; }
  .hero-actions .btn { width: 100%; justify-content: center; }

  .features-grid { grid-template-columns: 1fr; }
  .downloads-grid { grid-template-columns: 1fr; }
  .demo-features { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
  .update-item { grid-template-columns: 1fr; gap: 0.75rem; }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
  .contact-card { display: none; }

  .about-img { aspect-ratio: 16/9; }
  .about-visual-badge { font-size: 0.78rem; }
}

@media (max-width: 479px) {
  .hero-platforms { gap: 0.5rem; }
  .platform-badge { font-size: 0.72rem; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}