@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;1,400&display=swap');

/*
  ================================================================
  Vibe Map Space — "VIBE RADAR" Design System
  ================================================================
  Fonts  : Space Grotesk (headings) + Plus Jakarta Sans (body)
  Palette:
    --primary   #8A2BE2  blueviolet
    --secondary #48D1CC  medium turquoise
    --accent    #FFD700  gold
    --bg        #FDFBF7  warm off-white
    --text      #2C3E50  dark blue-grey
    --dark      #0D0621  deep violet-black  (dark sections)

  Key differentiators vs other domains:
  • Space Grotesk + Plus Jakarta Sans — not used anywhere else
  • Dark violet hero/footer (all others are light-hero)
  • Animated CSS radar pulse rings in hero
  • Numbered article list with oversized violet index numbers
  • clip-path diagonal section cuts
  • Frosted-glass nav on scroll (not top-bar style)
  • Waveform SVG footer decoration
  • "Signal bar" glow on feature blocks
  ================================================================
*/

/* ── RESET ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  line-height: 1.75;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}
main { flex: 1; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ── DESIGN TOKENS ─────────────────────────────────────────── */
:root {
  --primary:      #8A2BE2;
  --primary-dk:   #6a1bb2;
  --primary-hdg:  #3d0d7a;
  --primary-lt:   #b866ff;
  --primary-xlt:  #f3e8ff;
  --secondary:    #48D1CC;
  --secondary-dk: #2fb8b3;
  --secondary-lt: #e0faf9;
  --accent:       #FFD700;
  --accent-dk:    #d4a800;
  --bg:           #FDFBF7;
  --bg-off:       #F5F2EC;
  --text:         #2C3E50;
  --text-mid:     #4A6073;
  --text-soft:    #7A95A8;
  --dark:         #0D0621;
  --dark-2:       #160933;
  --dark-border:  rgba(138,43,226,0.3);
  --white:        #ffffff;
  --border:       rgba(44,62,80,0.1);

  --max-w:        1200px;
  --text-w:       780px;
  --header-h:     72px;
  --r:            12px;
  --r-sm:         6px;
  --r-lg:         24px;
  --t:            0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --t-fast:       0.16s ease;
  --shadow:       0 2px 20px rgba(138,43,226,0.10);
  --shadow-md:    0 6px 32px rgba(138,43,226,0.16);
  --shadow-lg:    0 16px 56px rgba(138,43,226,0.22);
  --glow:         0 0 20px rgba(72,209,204,0.35);
  --glow-v:       0 0 20px rgba(138,43,226,0.4);
}

/* ── TYPOGRAPHY ────────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  color: var(--text);
  line-height: 1.2;
  font-weight: 700;
}
h1 { font-size: clamp(2.2rem, 5vw, 4rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); }
h4 { font-size: 1rem; font-weight: 600; }
p  { color: var(--text-mid); }

/* ── LAYOUT ────────────────────────────────────────────────── */
.wrapper {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 28px;
}
.text-content {
  max-width: var(--text-w);
  margin: 0 auto;
}

/* ── UTILITY ────────────────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--secondary);
  margin-bottom: 16px;
}
.section-label::before {
  content: '';
  display: block;
  width: 28px;
  height: 2px;
  background: var(--secondary);
  flex-shrink: 0;
}

/* ── ANIMATIONS ─────────────────────────────────────────────── */
@keyframes radar-ring {
  0%   { transform: translate(-50%,-50%) scale(0.2); opacity: 0; }
  8%   { opacity: 0.75; }
  100% { transform: translate(-50%,-50%) scale(1);   opacity: 0; }
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: translate(-50%,-50%) scale(1); }
  50%       { opacity: 0.5; transform: translate(-50%,-50%) scale(0.8); }
}
@keyframes slide-bar {
  0%   { height: 8px; }
  50%  { height: 32px; }
  100% { height: 8px; }
}
@keyframes rotate-border {
  from { --angle: 0deg; }
  to   { --angle: 360deg; }
}
@keyframes float-slow {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}

/* ── HEADER ─────────────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: var(--header-h);
  transition: background var(--t), box-shadow var(--t), backdrop-filter var(--t);
}
.site-header.scrolled {
  background: rgba(13,6,33,0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 rgba(138,43,226,0.25);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}
.logo-link {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.logo-link img {
  height: 40px;
  width: auto;
  filter: invert(1);
}
.site-nav { display: flex; align-items: center; gap: 6px; }
.site-nav a {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.88rem;
  font-weight: 500;
  color: rgba(255,255,255,0.78);
  padding: 6px 16px;
  border-radius: var(--r-sm);
  transition: color var(--t-fast), background var(--t-fast);
  letter-spacing: 0.02em;
}
.site-nav a:hover,
.site-nav a.active { color: var(--secondary); background: rgba(72,209,204,0.10); }

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  padding: 6px;
  border-radius: var(--r-sm);
  transition: background var(--t-fast);
  z-index: 210;
}
.nav-toggle:hover { background: rgba(255,255,255,0.08); }
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform var(--t), opacity var(--t);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(13,6,33,0.97);
  z-index: 190;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--white);
  padding: 12px 32px;
  border-radius: var(--r);
  transition: color var(--t-fast), background var(--t-fast);
  letter-spacing: 0.02em;
}
.mobile-menu a:hover { color: var(--secondary); background: rgba(72,209,204,0.10); }

/* ── HERO ────────────────────────────────────────────────────── */
.hero {
  position: relative;
  background: var(--dark);
  color: var(--white);
  padding: calc(var(--header-h) + 80px) 0 100px;
  overflow: hidden;
  isolation: isolate;
}
.hero-radar {
  position: absolute;
  right: 8%;
  top: 50%;
  transform: translateY(-50%);
  width: 520px;
  height: 520px;
  pointer-events: none;
  z-index: 0;
}
.radar-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: 50%;
  border: 1.5px solid var(--primary);
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.2);
  animation: radar-ring 3.6s ease-out infinite;
  animation-fill-mode: backwards;
}
.radar-ring:nth-child(1) { width: 520px; height: 520px; animation-delay: 0s; }
.radar-ring:nth-child(2) { width: 380px; height: 380px; animation-delay: 0.9s; }
.radar-ring:nth-child(3) { width: 240px; height: 240px; animation-delay: 1.8s; }
.radar-ring:nth-child(4) { width: 100px; height: 100px; animation-delay: 2.7s; border-color: var(--secondary); }
.radar-center {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  background: var(--secondary);
  border-radius: 50%;
  transform: translate(-50%,-50%);
  animation: pulse-dot 2s ease-in-out infinite;
  box-shadow: 0 0 16px var(--secondary), 0 0 32px rgba(72,209,204,0.4);
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
}
.hero h1 {
  color: var(--white);
  margin-bottom: 24px;
}
.hero h1 span {
  background: linear-gradient(135deg, var(--secondary), var(--primary-lt));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 1.1rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.72);
  margin-bottom: 40px;
}
.hero-clip {
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--bg);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
}

/* ── SECTION BASE ────────────────────────────────────────────── */
.section { padding: 90px 0; }
.section--dark {
  background: var(--dark-2);
  color: var(--white);
  position: relative;
}
.section--dark h2,
.section--dark h3,
.section--dark h4 { color: var(--white); }
.section--dark p,
.section--dark li { color: rgba(255,255,255,0.68); }
.section--off { background: var(--bg-off); }
.section-header { margin-bottom: 52px; }
.section-header h2 { margin-bottom: 12px; }
.section-header p { font-size: 1.05rem; max-width: 560px; }
.section--dark .section-header p { color: rgba(255,255,255,0.62); }
.section-label--light { color: var(--secondary); }
.slider-intro {
  color: rgba(255,255,255,0.62);
  margin-bottom: 40px;
  font-size: 1.05rem;
}

/* dark section diagonal clip */
.section--dark::before {
  content: '';
  position: absolute;
  top: -50px;
  left: 0;
  right: 0;
  height: 50px;
  background: var(--dark-2);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
}
.section--dark::after {
  content: '';
  position: absolute;
  bottom: -50px;
  left: 0;
  right: 0;
  height: 50px;
  background: var(--dark-2);
  clip-path: polygon(0 0, 100% 0, 0 100%);
  z-index: -1;
}

/* ── INDEX: MAIN TEXT + IMAGE ────────────────────────────────── */
.index-intro { padding: 80px 0 0; }
.index-intro .text-content img {
  width: 100%;
  border-radius: var(--r-lg);
  margin: 32px 0;
  box-shadow: var(--shadow-lg);
}
.index-intro .text-content p { font-size: 1.05rem; line-height: 1.8; }

/* ── ADDING SECTION ─────────────────────────────────────────── */
.adding-section { padding: 80px 0 100px; }
.adding-section .text-content img {
  width: 100%;
  border-radius: var(--r-lg);
  margin: 28px 0;
  box-shadow: var(--shadow-md);
}
.adding-section .text-content p { font-size: 1.05rem; line-height: 1.8; }

/* ── SLIDER ─────────────────────────────────────────────────── */
.slider-section { padding: 100px 0 120px; }
.slider-wrap {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--dark);
}
.carousel-slider {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
}
.carousel-slider img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.7s ease;
}
.carousel-slider img.active { opacity: 1; }
.slider-controls {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 10;
}
.slider-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  border: none;
  cursor: pointer;
  transition: background var(--t-fast), transform var(--t-fast);
  padding: 0;
}
.slider-dot.active {
  background: var(--secondary);
  transform: scale(1.3);
}
.slider-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(13,6,33,0.6);
  color: var(--white);
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--t-fast);
  z-index: 10;
  border: 1px solid rgba(255,255,255,0.15);
}
.slider-nav:hover { background: var(--primary); }
.slider-nav--prev { left: 16px; }
.slider-nav--next { right: 16px; }

/* ── FEATURE BLOCKS ─────────────────────────────────────────── */
.feature-blocks { padding: 100px 0 120px; }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 32px 24px 24px;
  gap: 20px;
  transition: transform var(--t), box-shadow var(--t), border-color var(--t);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}
.feature-card-img-wrap {
  width: 100px;
  height: 100px;
  background: var(--primary-xlt);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--t);
}
.feature-card:hover .feature-card-img-wrap { background: rgba(138,43,226,0.12); }
.feature-card-img {
  width: 60px;
  height: 60px;
  object-fit: contain;
}
.feature-card-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
}
.signal-bars {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  flex-shrink: 0;
  height: 28px;
  overflow: hidden;
}
.signal-bars span {
  display: block;
  width: 4px;
  background: var(--secondary);
  border-radius: 2px;
  animation-fill-mode: both;
}
.feature-card:hover .signal-bars span { background: var(--primary); }
.signal-bars span:nth-child(1) { height: 8px;  animation: slide-bar 1.4s ease-in-out infinite 0s; }
.signal-bars span:nth-child(2) { height: 16px; animation: slide-bar 1.4s ease-in-out infinite 0.2s; }
.signal-bars span:nth-child(3) { height: 24px; animation: slide-bar 1.4s ease-in-out infinite 0.4s; }
.signal-bars span:nth-child(4) { height: 12px; animation: slide-bar 1.4s ease-in-out infinite 0.6s; }
.feature-card-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

/* ── FAQ ACCORDION ───────────────────────────────────────────── */
.faq-section { padding: 100px 0 120px; }
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
  background: var(--white);
  transition: border-color var(--t);
}
.faq-item.open { border-color: var(--primary); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 20px 24px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  transition: color var(--t-fast);
}
.faq-item.open .faq-question { color: var(--primary); }
.faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-xlt);
  color: var(--primary);
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--t-fast), transform var(--t);
}
.faq-item.open .faq-icon {
  background: var(--primary);
  color: var(--white);
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.42s ease;
}
.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--text-mid);
}

/* ── ARTICLES PAGE ───────────────────────────────────────────── */
.articles-hero {
  background: var(--dark);
  color: var(--white);
  padding: calc(var(--header-h) + 72px) 0 90px;
  position: relative;
  overflow: hidden;
}
.articles-hero::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0; right: 0;
  height: 48px;
  background: var(--bg);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
}
.articles-hero h1 { color: var(--white); margin-bottom: 12px; }
.articles-hero p { color: rgba(255,255,255,0.68); font-size: 1.05rem; }

.articles-body { padding: 72px 0 100px; }
.articles-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--border);
}
.article-item {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  gap: 0 24px;
  align-items: center;
  padding: 28px 24px 28px 0;
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
  text-decoration: none;
  color: inherit;
  transition: background var(--t-fast), padding var(--t-fast);
  border-radius: 0;
}
.article-item:nth-child(2n) { border-right: none; padding-left: 24px; padding-right: 0; }
.article-item:hover { background: var(--bg-off); }
.article-num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary);
  opacity: 0.18;
  line-height: 1;
  padding-top: 4px;
  transition: opacity var(--t);
}
.article-item:hover .article-num { opacity: 0.6; }
.article-info { display: flex; flex-direction: column; gap: 8px; padding-top: 6px; }
.article-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.18rem;
  font-weight: 600;
  color: var(--text);
  transition: color var(--t-fast);
}
.article-item:hover .article-title { color: var(--primary-hdg); }
.article-excerpt {
  font-size: 0.92rem;
  color: var(--text-soft);
  line-height: 1.6;
}
.article-arrow {
  align-self: center;
  color: var(--secondary);
  font-size: 1.1rem;
  transition: transform var(--t-fast);
}
.article-item:hover .article-arrow { transform: translateX(5px); }

/* ── ARTICLE PAGE ────────────────────────────────────────────── */
.article-hero {
  background: var(--dark);
  color: var(--white);
  padding: calc(var(--header-h) + 64px) 0 80px;
  position: relative;
  overflow: hidden;
}
.article-hero::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0; right: 0;
  height: 48px;
  background: var(--bg);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
}
.article-hero h1 { color: var(--white); margin-bottom: 0; }
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--secondary);
  margin-bottom: 24px;
  transition: gap var(--t-fast);
}
.back-link:hover { gap: 10px; }
.back-link svg { width: 16px; height: 16px; }

.article-body { padding: 72px 0 100px; }
.article-body .text-content h2 {
  margin-top: 44px;
  margin-bottom: 16px;
  font-size: clamp(1.3rem, 2.5vw, 1.8rem);
  color: var(--primary-hdg);
}
.article-body .text-content p {
  font-size: 1.05rem;
  line-height: 1.85;
  margin-bottom: 22px;
  color: var(--text-mid);
}
.article-body .text-content img {
  width: 100%;
  border-radius: var(--r-lg);
  margin: 32px 0;
  box-shadow: var(--shadow-lg);
}
.article-back-footer {
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  text-align: center;
}

/* ── ENERGY AUDIT PAGE ──────────────────────────────────────── */
.audit-hero {
  background: var(--dark);
  color: var(--white);
  padding: calc(var(--header-h) + 72px) 0 90px;
  position: relative;
  overflow: hidden;
}
.audit-hero::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0; right: 0;
  height: 48px;
  background: var(--bg);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
}
.audit-hero h1 { color: var(--white); margin-bottom: 12px; }
.audit-hero p  { color: rgba(255,255,255,0.68); font-size: 1.05rem; }

.audit-body { padding: 72px 0 100px; }
.audit-body .text-content h2 {
  margin-top: 44px;
  margin-bottom: 16px;
  font-size: clamp(1.3rem, 2.5vw, 1.8rem);
  color: var(--primary-hdg);
}
.audit-body .text-content p {
  font-size: 1.05rem;
  line-height: 1.85;
  margin-bottom: 22px;
  color: var(--text-mid);
}
.audit-body .text-content img {
  width: 100%;
  border-radius: var(--r-lg);
  margin: 32px 0;
  box-shadow: var(--shadow-lg);
}

/* Audit interactive cards */
.audit-steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 56px;
}
.audit-step {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 32px 28px;
  position: relative;
  overflow: hidden;
  transition: transform var(--t), box-shadow var(--t);
}
.audit-step:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.audit-step::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary), var(--secondary));
}
.audit-step-num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--primary);
  opacity: 0.12;
  line-height: 1;
  margin-bottom: 12px;
}
.audit-step h3 { margin-bottom: 8px; color: var(--text); }
.audit-step p  { font-size: 0.94rem; color: var(--text-mid); }

/* ── FOOTER ─────────────────────────────────────────────────── */
.site-footer {
  background: var(--dark);
  color: rgba(255,255,255,0.65);
  padding: 72px 0 32px;
  position: relative;
  margin-top: auto;
}
.footer-wave {
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 48px;
  overflow: hidden;
}
.footer-wave svg { width: 100%; height: 100%; display: block; }
.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px 60px;
  align-items: start;
  margin-bottom: 48px;
}
.footer-brand .logo-link img {
  height: 36px;
  width: auto;
  filter: invert(1);
  margin-bottom: 12px;
}
.footer-brand p { font-size: 0.88rem; line-height: 1.65; max-width: 300px; }
.footer-nav { display: flex; flex-direction: column; gap: 10px; align-items: flex-end; }
.footer-nav a {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255,255,255,0.68);
  transition: color var(--t-fast);
}
.footer-nav a:hover { color: var(--secondary); }
.footer-bottom {
  padding-top: 28px;
  border-top: 1px solid rgba(255,255,255,0.08);
  text-align: center;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.35);
}

/* ── RESPONSIVE ─────────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero-radar { width: 340px; height: 340px; right: -40px; opacity: 0.5; }
  .radar-ring:nth-child(1) { width: 340px; height: 340px; }
  .radar-ring:nth-child(2) { width: 250px; height: 250px; }
  .radar-ring:nth-child(3) { width: 160px; height: 160px; }
  .radar-ring:nth-child(4) { width: 70px; height: 70px; }
}
@media (max-width: 768px) {
  :root { --header-h: 60px; }
  .site-nav { display: none; }
  .nav-toggle { display: flex; }
  .hero { padding: calc(var(--header-h) + 56px) 0 80px; }
  .hero::before, .hero::after { display: none; }
  .hero-radar {
    width: 500px;
    height: 500px;
    right: -80px;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0.35;
  }
  .radar-ring:nth-child(1) { width: 500px; height: 500px; }
  .radar-ring:nth-child(2) { width: 360px; height: 360px; }
  .radar-ring:nth-child(3) { width: 220px; height: 220px; }
  .radar-ring:nth-child(4) { width: 90px;  height: 90px; }
  .hero-content { position: relative; z-index: 1; max-width: 100%; }
  .section { padding: 64px 0; }
  .feature-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .articles-list { grid-template-columns: 1fr; }
  .article-item { grid-template-columns: 52px 1fr auto; gap: 0 16px; border-right: none; padding: 24px 0; }
  .article-item:nth-child(2n) { padding-left: 0; }
  .article-item:hover { padding-left: 12px; padding-right: 12px; margin: 0 -12px; }
  .article-num { font-size: 2rem; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-nav { align-items: flex-start; }
  .adding-section { padding: 56px 0 80px; }
  .slider-section { padding: 64px 0 90px; }
  .feature-blocks { padding: 64px 0 90px; }
  .faq-section { padding: 64px 0 90px; }
}
@media (max-width: 480px) {
  .wrapper { padding: 0 16px; }
  h1 { font-size: clamp(1.8rem, 8vw, 2.8rem); }
  .hero-sub { font-size: 1rem; }
  .feature-grid { grid-template-columns: 1fr; }
  .audit-steps { grid-template-columns: 1fr; }
  .article-item { grid-template-columns: 52px 1fr; }
  .article-arrow { display: none; }
  .article-item:hover { padding-left: 8px; padding-right: 8px; margin: 0 -8px; background: var(--bg-off); }
}