/* ════════════════════════════════════════════
   CUSTOM PROPERTIES
════════════════════════════════════════════ */
:root {
  --bg:           #0a0f1e;
  --bg-2:         #0d1426;
  --bg-3:         #101828;
  --accent:       #00d4ff;
  --accent-dim:   rgba(0, 212, 255, 0.12);
  --accent-glow:  rgba(0, 212, 255, 0.28);
  --text:         #ffffff;
  --text-muted:   rgba(255, 255, 255, 0.58);
  --text-faint:   rgba(255, 255, 255, 0.28);
  --glass:        rgba(255, 255, 255, 0.04);
  --glass-hover:  rgba(255, 255, 255, 0.07);
  --glass-border: rgba(255, 255, 255, 0.09);
  --radius:       12px;
  --radius-lg:    20px;
  --font-head:    'Space Grotesk', sans-serif;
  --font-body:    'DM Sans', sans-serif;
  --max-w:        1160px;
  --header-h:     72px;
  --diag:         5vw;
}

/* ════════════════════════════════════════════
   RESET & BASE
════════════════════════════════════════════ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

/* ════════════════════════════════════════════
   LAYOUT
════════════════════════════════════════════ */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 28px;
}

/* ════════════════════════════════════════════
   TYPOGRAPHY
════════════════════════════════════════════ */
h1, h2, h3 {
  font-family: var(--font-head);
  font-stretch: normal;
}
h1 {
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.2;
}
h3 { font-size: 1.2rem; font-weight: 600; letter-spacing: -0.01em; line-height: 1.3; }

.section-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-body {
  color: var(--text-muted);
  font-size: 1.04rem;
  max-width: 660px;
  margin-top: 16px;
  line-height: 1.75;
}

/* ════════════════════════════════════════════
   BUTTONS
════════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius);
  padding: 14px 28px;
  transition: transform 0.22s ease, box-shadow 0.22s ease, background 0.22s ease, border-color 0.22s ease, color 0.22s ease;
  white-space: nowrap;
  line-height: 1;
}

.btn-primary {
  background: var(--accent);
  color: #060c18;
  box-shadow: 0 0 28px var(--accent-glow);
}
.btn-primary:hover {
  background: #22deff;
  box-shadow: 0 0 44px var(--accent-glow), 0 4px 20px rgba(0,212,255,0.2);
  transform: translateY(-2px);
}

.btn-ghost {
  border: 1.5px solid var(--glass-border);
  color: var(--text-muted);
  background: var(--glass);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
  transform: translateY(-2px);
}

.btn-sm { padding: 10px 20px; font-size: 0.875rem; }

/* ════════════════════════════════════════════
   SCROLL ANIMATIONS
════════════════════════════════════════════ */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ════════════════════════════════════════════
   HEADER
════════════════════════════════════════════ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: var(--header-h);
  background: rgba(10, 15, 30, 0.75);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid var(--glass-border);
  transition: background 0.3s;
}
.site-header.scrolled {
  background: rgba(10, 15, 30, 0.96);
}

.header-inner {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 8px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.08rem;
  flex-shrink: 0;
  transition: opacity 0.2s;
}
.logo:hover { opacity: 0.85; }
.logo-mark { color: var(--accent); font-size: 1.3rem; line-height: 1; }
.logo-text strong { color: var(--accent); }

/* Nav */
.main-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
  margin-right: 16px;
}
.nav-link {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 8px 14px;
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}
.nav-link:hover {
  color: var(--text);
  background: var(--glass);
}

/* Mobile hamburger */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 8px;
  margin-left: auto;
}
.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.mobile-menu-btn.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-btn.open span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ════════════════════════════════════════════
   HERO
════════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  padding-top: var(--header-h);
  overflow: hidden;
}

/* Dot-grid background */
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(0, 212, 255, 0.13) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 50% 40%, black 30%, transparent 100%);
  mask-image: radial-gradient(ellipse 90% 80% at 50% 40%, black 30%, transparent 100%);
}

/* Glow blob */
.hero-glow {
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.07) 0%, transparent 65%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding-top: 64px;
  padding-bottom: 48px;
}

.hero-image {
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-image img {
  width: 100%;
  max-width: 540px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  box-shadow: 0 0 60px rgba(0, 212, 255, 0.07), 0 24px 56px rgba(0, 0, 0, 0.45);
  object-fit: cover;
  display: block;
}

.hero-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(0, 212, 255, 0.32);
  background: rgba(0, 212, 255, 0.06);
  border-radius: 100px;
  padding: 6px 18px;
  margin-bottom: 28px;
}

.hero-content h1 {
  margin-bottom: 24px;
  max-width: 800px;
  background: linear-gradient(130deg, #ffffff 55%, rgba(0, 212, 255, 0.75) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.18rem;
  color: var(--text-muted);
  max-width: 540px;
  margin-bottom: 40px;
  line-height: 1.72;
}

.hero-ctas {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Stats bar */
.stats-bar {
  position: relative;
  z-index: 2;
  border-top: 1px solid var(--glass-border);
  background: rgba(0, 212, 255, 0.035);
  backdrop-filter: blur(8px);
}

.stats-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 30px 24px;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 0 52px;
}

.stat-num {
  font-family: var(--font-head);
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}

.stat-label {
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.stat-divider {
  width: 1px;
  height: 44px;
  background: var(--glass-border);
  flex-shrink: 0;
}

/* ════════════════════════════════════════════
   KEY TAKEAWAYS
════════════════════════════════════════════ */
.key-takeaways {
  padding: 88px 0;
  background: var(--bg);
}

.takeaways-card {
  background: linear-gradient(140deg, rgba(0, 212, 255, 0.07) 0%, rgba(255, 255, 255, 0.025) 100%);
  border: 1px solid rgba(0, 212, 255, 0.18);
  border-radius: var(--radius-lg);
  padding: 52px;
  backdrop-filter: blur(12px);
}

.takeaways-header { margin-bottom: 40px; }
.takeaways-header h2 { margin-top: 6px; }

.takeaways-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.takeaway-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 22px 24px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  transition: border-color 0.25s, background 0.25s;
}
.takeaway-item:hover {
  border-color: rgba(0, 212, 255, 0.28);
  background: var(--glass-hover);
}

.takeaway-num {
  font-family: var(--font-head);
  font-size: 1.7rem;
  font-weight: 800;
  color: rgba(0, 212, 255, 0.28);
  line-height: 1;
  flex-shrink: 0;
  min-width: 44px;
}

.takeaway-item p {
  color: var(--text-muted);
  font-size: 0.94rem;
  line-height: 1.6;
  margin-top: 2px;
}

/* ════════════════════════════════════════════
   DIAGONAL SECTIONS
════════════════════════════════════════════ */
.diagonal-section {
  position: relative;
  z-index: 1;
  background: var(--bg-2);
  clip-path: polygon(0 var(--diag), 100% 0, 100% calc(100% - var(--diag)), 0 100%);
  padding: calc(100px + var(--diag)) 0;
  margin: calc(-1 * var(--diag)) 0;
}

.diagonal-section-reverse {
  position: relative;
  z-index: 1;
  background: var(--bg-3);
  clip-path: polygon(0 0, 100% var(--diag), 100% 100%, 0 calc(100% - var(--diag)));
  padding: calc(100px + var(--diag)) 0;
  margin: calc(-1 * var(--diag)) 0;
}

/* ════════════════════════════════════════════
   WHAT IS SMS ACTIVATION
════════════════════════════════════════════ */
/* two-column row: image left, text right */
.what-is-top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 64px;
}

.what-is-image img {
  width: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  box-shadow: 0 0 60px rgba(0, 212, 255, 0.06), 0 20px 48px rgba(0, 0, 0, 0.4);
  object-fit: cover;
  display: block;
}

.what-is h2 { margin-top: 6px; }
.what-is .section-body + .section-body { margin-top: 14px; }

/* 4-step infographic */
.infographic {
  display: flex;
  align-items: stretch;
  gap: 0;
  flex-wrap: nowrap;
}

.infographic-step {
  flex: 1;
  min-width: 0;
  text-align: center;
  padding: 28px 16px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  transition: border-color 0.25s, background 0.25s;
}
.infographic-step:hover {
  border-color: rgba(0, 212, 255, 0.38);
  background: rgba(0, 212, 255, 0.055);
}

.step-icon { font-size: 2rem; margin-bottom: 12px; }

.step-label {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.92rem;
  margin-bottom: 8px;
  color: var(--text);
}

.step-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.step-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.4rem;
  padding: 0 10px;
  flex-shrink: 0;
  opacity: 0.6;
  margin-top: 0;
}

/* ════════════════════════════════════════════
   TECHNICAL PROCESS
════════════════════════════════════════════ */
.technical {
  padding: 104px 0;
  background: var(--bg);
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.col-text h2 { margin-top: 6px; }

.step-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  counter-reset: step-counter;
}

.step-list li {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: 20px 22px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  transition: border-color 0.22s, background 0.22s;
}
.step-list li:hover {
  border-color: rgba(0, 212, 255, 0.24);
  background: var(--glass-hover);
}

.step-num {
  width: 32px;
  height: 32px;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.82rem;
  flex-shrink: 0;
}

.step-content {
  color: var(--text-muted);
  font-size: 0.93rem;
  line-height: 1.6;
  padding-top: 5px;
}
.step-content strong { color: var(--text); font-weight: 600; }

/* ════════════════════════════════════════════
   PLATFORMS
════════════════════════════════════════════ */
.platforms .section-intro { margin-bottom: 52px; }
.platforms h2 { margin-top: 6px; }

.platform-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.platform-card {
  min-width: 0;           /* prevent grid blowout */
  padding: 36px 30px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  transition: transform 0.3s ease, border-color 0.3s, background 0.3s, box-shadow 0.3s;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.platform-card:hover {
  transform: translateY(-7px);
  border-color: rgba(0, 212, 255, 0.28);
  background: var(--glass-hover);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}
.platform-card.featured {
  border-color: rgba(0, 212, 255, 0.32);
  background: rgba(0, 212, 255, 0.055);
}
.platform-card.featured:hover {
  border-color: rgba(0, 212, 255, 0.5);
  box-shadow: 0 20px 40px rgba(0, 212, 255, 0.08);
}

.platform-icon { font-size: 2.4rem; line-height: 1; }
.platform-card h3 { font-family: var(--font-head); }
.platform-card p { color: var(--text-muted); font-size: 0.91rem; flex: 1; line-height: 1.6; }

.card-link {
  display: inline-block;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--accent);
  margin-top: 4px;
  transition: opacity 0.2s;
}
.card-link:hover { opacity: 0.72; }

/* ════════════════════════════════════════════
   SERVICES GRID
════════════════════════════════════════════ */
.services {
  padding: 104px 0;
  background: var(--bg);
}
.services .section-intro { margin-bottom: 44px; }
.services h2 { margin-top: 6px; }

.services-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.service-badge {
  padding: 10px 20px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 100px;
  font-size: 0.87rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.2s, border-color 0.2s, background 0.2s, transform 0.2s;
}
.service-badge:hover {
  color: var(--text);
  border-color: rgba(0, 212, 255, 0.38);
  background: rgba(0, 212, 255, 0.06);
  transform: translateY(-2px);
}

.accent-badge {
  background: rgba(0, 212, 255, 0.1);
  border-color: rgba(0, 212, 255, 0.38);
  color: var(--accent);
  font-weight: 600;
}

/* ════════════════════════════════════════════
   FAQ
════════════════════════════════════════════ */
.faq {
  padding: 104px 0 128px;
  background: var(--bg);
}
.faq .section-intro { margin-bottom: 44px; }
.faq h2 { margin-top: 6px; }

.faq-list {
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.faq-item {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.25s;
}
.faq-item.open {
  border-color: rgba(0, 212, 255, 0.22);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 22px 28px;
  font-size: 0.98rem;
  font-weight: 500;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  transition: background 0.2s;
}
.faq-question:hover { background: var(--glass-hover); }

.faq-icon {
  font-size: 1.5rem;
  color: var(--accent);
  flex-shrink: 0;
  line-height: 1;
  transition: transform 0.3s ease;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.42s ease, padding 0.42s ease;
  padding: 0 28px;
}
.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 0 28px 26px;
}

.faq-answer p {
  color: var(--text-muted);
  font-size: 0.94rem;
  line-height: 1.75;
  border-top: 1px solid var(--glass-border);
  padding-top: 16px;
}

/* ════════════════════════════════════════════
   PRICING
════════════════════════════════════════════ */
.pricing {
  padding: 104px 0;
  background: var(--bg-2);
}
.pricing .section-intro { margin-bottom: 52px; }
.pricing h2 { margin-top: 6px; }

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: start;
}

.pricing-card {
  position: relative;
  min-width: 0;
  padding: 36px 26px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: transform 0.3s ease, border-color 0.3s, background 0.3s, box-shadow 0.3s;
}
.pricing-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 212, 255, 0.25);
}
.pricing-card.featured {
  border-color: rgba(0, 212, 255, 0.4);
  background: rgba(0, 212, 255, 0.055);
}
.pricing-card.featured:hover {
  border-color: var(--accent);
  box-shadow: 0 20px 40px rgba(0, 212, 255, 0.08);
}

.pricing-badge {
  position: absolute;
  top: -1px;
  right: 22px;
  background: var(--accent);
  color: #060c18;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 0 0 8px 8px;
}

.pricing-tier {
  font-family: var(--font-head);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.pricing-price {
  display: flex;
  align-items: baseline;
  gap: 5px;
  flex-wrap: wrap;
}
.price-from  { font-size: 0.8rem; color: var(--text-muted); }
.price-amount {
  font-family: var(--font-head);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1;
}
.price-custom { font-size: 2rem; }
.price-unit  { font-size: 0.8rem; color: var(--text-muted); }

.pricing-desc {
  font-size: 0.87rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.pricing-features {
  display: flex;
  flex-direction: column;
  gap: 9px;
  flex: 1;
}
.pricing-features li {
  font-size: 0.86rem;
  color: var(--text-muted);
  padding-left: 20px;
  position: relative;
  line-height: 1.4;
}
.pricing-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.78rem;
}

.pricing-btn { width: 100%; margin-top: 4px; }

/* ════════════════════════════════════════════
   FOOTER
════════════════════════════════════════════ */
.site-footer {
  background: var(--bg-2);
  border-top: 1px solid var(--glass-border);
}

.footer-top { padding: 64px 0; }

.footer-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 60px;
  align-items: start;
}

.footer-brand { flex-shrink: 0; }
.footer-brand .logo { margin-bottom: 14px; }
.footer-tagline {
  font-size: 0.87rem;
  color: var(--text-muted);
  max-width: 200px;
  line-height: 1.6;
}

/* 3-column link grid */
.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.footer-col-title {
  font-family: var(--font-head);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 16px;
}

.footer-col nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color 0.2s;
  line-height: 1.4;
}
.footer-link:hover { color: var(--accent); }
.footer-link-accent { color: var(--accent); font-weight: 500; }
.footer-link-accent:hover { opacity: 0.75; }

.footer-cta {
  display: flex;
  align-items: flex-start;
  flex-shrink: 0;
}

.footer-bottom {
  border-top: 1px solid var(--glass-border);
  padding: 20px 0;
}
.footer-bottom p {
  font-size: 0.82rem;
  color: var(--text-faint);
  text-align: center;
}

/* ════════════════════════════════════════════
   RESPONSIVE — 768px
════════════════════════════════════════════ */
@media (max-width: 768px) {

  /* Header nav: slide-down drawer */
  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: rgba(10, 15, 30, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    flex-direction: column;
    padding: 20px 24px;
    gap: 4px;
    margin-left: 0;
    margin-right: 0;
    transform: translateY(-110%);
    transition: transform 0.32s ease;
    z-index: 199;
  }
  .main-nav.open { transform: translateY(0); }

  .mobile-menu-btn { display: flex; }
  .header-inner .btn-sm { display: none; }

  /* Hero */
  .hero-inner { grid-template-columns: 1fr; gap: 0; }
  .hero-image { display: none; }
  .hero-sub { font-size: 1.05rem; }
  .hero-ctas { flex-direction: column; }
  .hero-ctas .btn { width: 100%; }

  /* Stats */
  .stats-inner { flex-wrap: wrap; gap: 28px; justify-content: center; }
  .stat { padding: 0 24px; }
  .stat-divider { display: none; }

  /* Kill diagonals on mobile */
  .diagonal-section,
  .diagonal-section-reverse {
    clip-path: none;
    margin: 0;
    padding: 80px 0;
  }

  /* Key takeaways */
  .takeaways-card { padding: 28px 20px; }
  .takeaways-grid { grid-template-columns: 1fr; }

  /* What-is two-column */
  .what-is-top { grid-template-columns: 1fr; gap: 0; margin-bottom: 48px; }
  .what-is-image { display: none; }

  /* Infographic stacks vertically */
  .infographic { flex-direction: column; gap: 12px; }
  .step-arrow { transform: rotate(90deg); align-self: center; margin: -4px 0; }

  /* Technical */
  .two-col { grid-template-columns: 1fr; gap: 44px; }

  /* Platform cards */
  .platform-cards { grid-template-columns: 1fr; }

  /* Pricing */
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }

  /* Footer */
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .footer-brand { display: flex; flex-direction: column; align-items: center; text-align: center; }
  .footer-tagline { max-width: 100%; text-align: center; }
  .footer-cols { grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .footer-cta { justify-content: center; }
}

@media (max-width: 480px) {
  .stat-num { font-size: 1.6rem; }
  .stat { padding: 0 16px; }
  .takeaways-card { padding: 22px 16px; }
  .faq-question { padding: 18px 20px; font-size: 0.92rem; }
  .faq-answer { padding: 0 20px; }
  .faq-item.open .faq-answer { padding: 0 20px 20px; }
  .pricing-grid { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: 1fr; gap: 24px; }
}