:root {
  --navy: #0A0F1E;
  --navy-2: #0E1426;
  --navy-3: #141B30;
  --ink: #0A0F1E;
  --paper: #FFFFFF;
  --paper-2: #F7F8FA;
  --line: #E5E7EB;
  --line-dark: rgba(255,255,255,0.08);
  --line-dark-2: rgba(255,255,255,0.14);
  --slate: #5A6478;
  --slate-2: #8A93A6;
  --slate-light: #C9CFDB;
  --indigo: #4F46E5;
  --indigo-2: #6366F1;
  --indigo-soft: rgba(79, 70, 229, 0.12);
  --serif: 'Sora', system-ui, sans-serif;
  --sans: 'Source Sans 3', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5 {
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.08;
  text-wrap: balance;
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ================= NAVBAR ================= */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  padding: 18px 0;
  background: rgba(10, 15, 30, 0.0);
  border-bottom: 1px solid transparent;
  transition: background 220ms ease, border-color 220ms ease, backdrop-filter 220ms ease, padding 220ms ease;
}
.nav.scrolled {
  background: rgba(10, 15, 30, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-dark);
  padding: 14px 0;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.nav-cta-desktop {
  display: flex;
  align-items: center;
  gap: 20px;
}
.wordmark {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 20px;
  letter-spacing: -0.02em;
  color: #fff;
  display: flex;
  align-items: center;
  text-decoration: none;
}

.wordmark .dot {
  width: 8px;
  height: 8px;
  background: var(--indigo);
  border-radius: 2px;
  display: inline-block;
  transform: rotate(45deg);
  margin-right: 10px;
  flex-shrink: 0;
}

.wordmark .ai {
  color: var(--slate-2);
  font-weight: 400;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}
.nav-links a {
  font-size: 15px;
  color: rgba(255,255,255,0.72);
  text-decoration: none;
  transition: color 160ms ease;
}
.nav-links a:hover { color: #fff; }

/* ================= BUTTONS ================= */
.btn {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 15px;
  padding: 12px 22px;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 160ms ease;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  letter-spacing: 0.005em;
}
.btn-primary {
  background: var(--indigo);
  color: #fff;
  box-shadow: 0 1px 0 rgba(255,255,255,0.12) inset, 0 8px 24px -10px rgba(79,70,229,0.6);
}
.btn-primary:hover {
  background: #4338CA;
  transform: translateY(-1px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.18) inset, 0 12px 30px -10px rgba(79,70,229,0.7);
}
.btn-ghost-dark {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.18);
}
.btn-ghost-dark:hover {
  border-color: rgba(255,255,255,0.36);
  background: rgba(255,255,255,0.04);
}
.btn-ghost-light {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.btn-ghost-light:hover {
  border-color: #94A3B8;
  background: var(--paper-2);
}
.btn-light {
  background: #fff;
  color: var(--ink);
}
.btn-light:hover {
  background: var(--paper-2);
}
.btn-arrow {
  display: inline-block;
  width: 14px;
  height: 1px;
  background: currentColor;
  position: relative;
  margin-left: 4px;
}
.btn-arrow::after {
  content: "";
  position: absolute;
  right: 0; top: 50%;
  width: 6px; height: 6px;
  border-top: 1px solid currentColor;
  border-right: 1px solid currentColor;
  transform: translateY(-50%) rotate(45deg);
}

/* ================= HERO ================= */
.hero {
  background: var(--navy);
  color: #fff;
  min-height: 100vh;
  padding: 140px 0 80px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(900px 500px at 85% 30%, rgba(79,70,229,0.16), transparent 60%),
    radial-gradient(700px 400px at 10% 90%, rgba(79,70,229,0.06), transparent 70%);
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 64px;
  align-items: center;
  position: relative;
  min-height: calc(100vh - 220px);
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--slate-light);
  padding: 6px 12px;
  border: 1px solid var(--line-dark-2);
  border-radius: 999px;
  margin-bottom: 28px;
  font-weight: 500;
}
.hero-eyebrow .pulse {
  width: 6px; height: 6px;
  background: var(--indigo-2);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(99,102,241,0.18);
}
.hero h1 {
  font-size: clamp(44px, 5.4vw, 76px);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: -0.035em;
  margin-bottom: 24px;
}
.hero h1 .accent { color: var(--slate-light); font-weight: 400; }
.hero-sub {
  font-size: 18px;
  color: var(--slate-light);
  max-width: 480px;
  margin-bottom: 40px;
  line-height: 1.55;
}
.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.hero-trust {
  margin-top: 56px;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.hero-trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--slate-2);
  letter-spacing: 0.02em;
}
.hero-trust-item .check {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: rgba(79,70,229,0.15);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--indigo-2);
  font-size: 10px;
}
.hero-divider {
  width: 1px; height: 14px;
  background: var(--line-dark-2);
}

/* ================= HERO MOCKUP STACK ================= */
.mock-stack {
  position: relative;
  height: 600px;
  perspective: 1600px;
}
.mock-card {
  position: absolute;
  border-radius: 14px;
  background: #0E1426;
  border: 1px solid var(--line-dark-2);
  box-shadow: 0 30px 80px -20px rgba(0,0,0,0.6), 0 0 0 1px rgba(255,255,255,0.02) inset;
  overflow: hidden;
}
.mock-card.guide {
  width: 78%;
  height: 320px;
  top: 0; left: 0;
  transform: rotate(-3deg) translateZ(0);
  z-index: 1;
}
.mock-card.chat {
  width: 70%;
  height: 280px;
  top: 200px;
  right: 0;
  transform: rotate(2deg);
  z-index: 3;
}
.mock-card.cluster {
  width: 64%;
  height: 240px;
  bottom: 0;
  left: 8%;
  transform: rotate(-1deg);
  z-index: 2;
}
.mock-glow {
  position: absolute;
  inset: -40px;
  background: radial-gradient(circle at 50% 50%, rgba(79,70,229,0.25), transparent 60%);
  filter: blur(40px);
  z-index: -1;
}

/* card chrome */
.card-chrome {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line-dark);
  background: rgba(255,255,255,0.02);
}
.card-chrome .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.18);
}
.card-chrome .title {
  margin-left: 12px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--slate-2);
}

/* ================= PROBLEM SECTION ================= */
.problem {
  background: var(--navy);
  color: #fff;
  padding: 140px 0;
  border-top: 1px solid var(--line-dark);
}
.section-label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--indigo-2);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.section-label::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--indigo-2);
}
.section-label.dark { color: var(--indigo); }
.section-label.dark::before { background: var(--indigo); }

.problem h2 {
  font-size: clamp(36px, 4vw, 56px);
  max-width: 800px;
  margin-bottom: 80px;
  letter-spacing: -0.03em;
}
.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--line-dark);
}
.problem-item {
  padding: 56px 40px 56px 0;
  border-right: 1px solid var(--line-dark);
}
.problem-item:last-child { border-right: none; padding-right: 0; }
.problem-item:not(:first-child) { padding-left: 40px; }
.problem-num {
  font-family: var(--serif);
  font-size: 56px;
  font-weight: 500;
  letter-spacing: -0.04em;
  color: #fff;
  margin-bottom: 8px;
  line-height: 1;
}
.problem-num .unit {
  font-size: 24px;
  color: var(--slate-2);
  font-weight: 400;
  margin-left: 6px;
}
.problem-label {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--slate-2);
  margin-bottom: 24px;
}
.problem-text {
  font-size: 17px;
  color: var(--slate-light);
  line-height: 1.55;
  max-width: 320px;
}

/* ================= SOLUTION ================= */
.solution {
  background: var(--paper);
  padding: 140px 0;
}
.solution-intro {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  margin-bottom: 80px;
  align-items: end;
}
.solution h2 {
  font-size: clamp(36px, 4vw, 52px);
  letter-spacing: -0.03em;
}
.solution-intro p {
  font-size: 18px;
  color: var(--slate);
  line-height: 1.6;
  max-width: 520px;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  transition: all 220ms ease;
}
.feature-card:hover {
  border-color: #C7CDDB;
  transform: translateY(-2px);
  box-shadow: 0 20px 40px -20px rgba(10,15,30,0.12);
}
.feature-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: #fff;
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--indigo);
}
.feature-card h3 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.feature-card p {
  font-size: 15px;
  color: var(--slate);
  line-height: 1.55;
  margin-top: -8px;
}
.mini-mockup {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
  height: 200px;
  overflow: hidden;
  position: relative;
}
.mini-mockup.dark {
  background: var(--navy);
  border-color: var(--navy-3);
}

/* ================= HOW IT WORKS ================= */
.how {
  background: var(--paper-2);
  padding: 140px 0;
  border-top: 1px solid var(--line);
}
.how h2 {
  font-size: clamp(36px, 4vw, 52px);
  margin-bottom: 80px;
  max-width: 700px;
}
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
}
.step {
  position: relative;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}
.step-num {
  position: absolute;
  top: -8px;
  right: 0;
  font-family: var(--serif);
  font-size: 120px;
  font-weight: 500;
  color: #E8EAEF;
  line-height: 0.85;
  letter-spacing: -0.05em;
  pointer-events: none;
  z-index: 0;
}
.step-content {
  position: relative;
  z-index: 1;
}
.step-tag {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--indigo);
  margin-bottom: 16px;
}
.step h3 {
  font-size: 24px;
  margin-bottom: 12px;
  font-weight: 600;
}
.step p {
  color: var(--slate);
  font-size: 16px;
  max-width: 280px;
}

/* ================= SECURITY ================= */
.security {
  background: var(--paper);
  padding: 140px 0;
  border-top: 1px solid var(--line);
}
.security-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 100px;
  align-items: start;
}
.security h2 {
  font-size: clamp(36px, 4vw, 56px);
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}
.security-lead {
  font-size: 18px;
  color: var(--slate);
  max-width: 460px;
}
.trust-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.trust-item {
  display: flex;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  align-items: flex-start;
}
.trust-item:last-child { border-bottom: none; }
.trust-icon {
  flex-shrink: 0;
  width: 36px; height: 36px;
  border-radius: 8px;
  background: var(--indigo-soft);
  color: var(--indigo);
  display: flex;
  align-items: center;
  justify-content: center;
}
.trust-text h4 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 4px;
}
.trust-text p {
  font-size: 15px;
  color: var(--slate);
  line-height: 1.5;
}

.shield-visual {
  aspect-ratio: 1;
  background: var(--navy);
  border-radius: 16px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.shield-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 50%, rgba(79,70,229,0.22), transparent 60%),
    repeating-linear-gradient(0deg, transparent 0, transparent 39px, rgba(255,255,255,0.04) 39px, rgba(255,255,255,0.04) 40px),
    repeating-linear-gradient(90deg, transparent 0, transparent 39px, rgba(255,255,255,0.04) 39px, rgba(255,255,255,0.04) 40px);
}
.shield-mark {
  position: relative;
  width: 160px;
  height: 180px;
  z-index: 2;
}
.shield-perimeter {
  position: absolute;
  inset: -40px;
  border: 1px dashed rgba(79,70,229,0.35);
  border-radius: 50%;
  animation: spin 32s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.shield-stamp {
  position: absolute;
  bottom: 28px;
  left: 28px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--slate-2);
}
.shield-stamp .num {
  color: #fff;
  display: block;
  font-size: 13px;
  margin-top: 4px;
}

/* ================= FINAL CTA ================= */
.final-cta {
  background: var(--navy);
  color: #fff;
  padding: 160px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.final-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(800px 400px at 50% 100%, rgba(79,70,229,0.22), transparent 60%);
}
.final-cta-inner {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}
.final-cta h2 {
  font-size: clamp(40px, 5vw, 72px);
  margin-bottom: 32px;
  letter-spacing: -0.035em;
}
.final-cta-sub {
  color: var(--slate-light);
  font-size: 17px;
  margin-top: 24px;
  font-family: var(--mono);
  letter-spacing: 0.02em;
}

/* ================= FOOTER ================= */
.footer {
  background: var(--navy);
  color: var(--slate-2);
  padding: 40px 0;
  border-top: 1px solid var(--line-dark);
  font-size: 14px;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-left {
  display: flex;
  align-items: center;
  gap: 24px;
}
.footer-tag {
  color: var(--slate-2);
  font-size: 13px;
}
.footer-links {
  display: flex;
  gap: 28px;
  list-style: none;
}
.footer-links a {
  color: var(--slate-2);
  text-decoration: none;
  font-size: 13px;
  transition: color 160ms ease;
}
.footer-links a:hover { color: #fff; }
.footer-copy {
  font-size: 12px;
  color: #5A6478;
}

/* ================= MODAL ================= */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(8, 12, 24, 0.72);
  backdrop-filter: blur(8px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 240ms ease;
}
.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}
.modal {
  background: #fff;
  border-radius: 16px;
  width: 100%;
  max-width: 480px;
  padding: 40px;
  position: relative;
  transform: translateY(12px) scale(0.98);
  transition: transform 280ms cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 40px 80px -20px rgba(0,0,0,0.5);
}
.modal-backdrop.open .modal {
  transform: translateY(0) scale(1);
}
.modal-close {
  position: absolute;
  top: 16px; right: 16px;
  width: 32px; height: 32px;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: 6px;
  color: var(--slate);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 160ms ease;
}
.modal-close:hover { background: var(--paper-2); }
.modal h3 {
  font-size: 24px;
  margin-bottom: 8px;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.modal-sub {
  color: var(--slate);
  font-size: 15px;
  margin-bottom: 28px;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}
.field label {
  font-size: 13px;
  color: var(--slate);
  font-weight: 500;
  font-family: var(--sans);
}
.field input {
  font-family: var(--sans);
  font-size: 15px;
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  transition: border-color 160ms ease, box-shadow 160ms ease;
  outline: none;
}
.field input:focus {
  border-color: var(--indigo);
  box-shadow: 0 0 0 3px var(--indigo-soft);
}
.field-error {
  color: #B91C1C;
  font-size: 12px;
}
.modal .btn-primary {
  width: 100%;
  justify-content: center;
  padding: 14px 22px;
  margin-top: 12px;
}
.modal-success {
  text-align: center;
  padding: 12px 0;
}
.modal-success .check-circle {
  width: 56px; height: 56px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--indigo-soft);
  color: var(--indigo);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ================= FADE-IN ================= */
.fade-up {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 700ms ease, transform 700ms cubic-bezier(0.16, 1, 0.3, 1);
}
.fade-up.in {
  opacity: 1;
  transform: translateY(0);
}
.fade-up.delay-1 { transition-delay: 80ms; }
.fade-up.delay-2 { transition-delay: 160ms; }
.fade-up.delay-3 { transition-delay: 240ms; }
.fade-up.delay-4 { transition-delay: 320ms; }

/* ================= HAMBURGER / MOBILE NAV ================= */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: 6px;
  transition: background 160ms ease;
  flex-shrink: 0;
}
.nav-hamburger:hover { background: rgba(255,255,255,0.07); }
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: rgba(255,255,255,0.88);
  border-radius: 2px;
  transition: transform 260ms cubic-bezier(0.16,1,0.3,1), opacity 160ms ease;
  transform-origin: center;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-mobile-menu {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 48;
  background: rgba(10, 15, 30, 0.97);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line-dark);
  padding: 68px 24px 28px;
  display: flex;
  flex-direction: column;
  gap: 0;
  transform: translateY(-100%);
  transition: transform 340ms cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}
.nav-mobile-menu.open {
  transform: translateY(0);
  pointer-events: auto;
}
.nav-mobile-menu a {
  font-size: 18px;
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: -0.015em;
  color: rgba(255,255,255,0.72);
  text-decoration: none;
  padding: 14px 4px;
  border-bottom: 1px solid var(--line-dark);
  transition: color 140ms ease;
  display: block;
}
.nav-mobile-menu a:hover { color: #fff; }
.nav-mobile-cta {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.nav-mobile-phone {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--slate-2);
  font-family: var(--mono);
  font-size: 13px;
  text-decoration: none;
  padding: 6px 0;
  transition: color 140ms ease;
}
.nav-mobile-phone:hover { color: rgba(255,255,255,0.8); }

/* ================= RESPONSIVE ================= */
@media (max-width: 960px) {
  .hero-grid, .solution-intro, .security-grid { grid-template-columns: 1fr; gap: 48px; }
  .feature-grid, .steps, .problem-grid { grid-template-columns: 1fr; }
  .problem-item { border-right: none; border-bottom: 1px solid var(--line-dark); padding: 32px 0 !important; }
  .problem-item:last-child { border-bottom: none; }
  .nav-links { display: none; }
  .nav-cta-desktop { display: none; }
  .nav-hamburger { display: flex; }
  .mock-stack { height: 420px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 768px) {
  .container { padding: 0 20px; }

  .hero { padding: 110px 0 64px; }
  .hero-grid { gap: 32px; }
  .mock-stack { height: 360px; }

  .problem, .solution, .how, .security { padding: 96px 0; }
  .final-cta { padding: 110px 0; }

  .problem h2 { margin-bottom: 56px; }
  .solution-intro { margin-bottom: 56px; gap: 24px; }
  .how h2 { margin-bottom: 56px; }

  .step-num { font-size: 96px; }
  .security-grid { gap: 48px; }
  .shield-visual { max-height: 340px; }

  .modal { padding: 32px 24px; }
}

@media (max-width: 600px) {
  .mock-stack { display: none; }
  .hero-grid { min-height: auto; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }

  .hero { padding: 88px 0 52px; }
  .hero-sub { font-size: 16px; max-width: 100%; }
  .hero-trust { gap: 14px; }
  .hero-divider { display: none; }

  .problem, .solution, .how, .security { padding: 72px 0; }
  .final-cta { padding: 80px 0; }

  .problem h2 { margin-bottom: 40px; }
  .problem-num { font-size: 48px; }
  .problem-item { padding: 24px 0 !important; }
  .problem-text { max-width: 100%; }

  .solution-intro { gap: 16px; margin-bottom: 40px; }
  .solution-intro p { font-size: 16px; }

  .feature-card { padding: 24px 20px; }
  .feature-card h3 { font-size: 20px; }
  .mini-mockup { height: 180px; }

  .how h2 { margin-bottom: 40px; }
  .step-num { font-size: 72px; }
  .step h3 { font-size: 20px; }
  .step p { font-size: 15px; max-width: 100%; }

  .security h2 { margin-bottom: 16px; }
  .shield-visual { max-height: 260px; }

  .final-cta h2 { font-size: 32px; }
  .final-cta-sub { font-size: 14px; }

  .modal { padding: 28px 20px; }

  .footer-inner { gap: 20px; }
  .footer-left { flex-direction: column; align-items: flex-start; gap: 8px; }
  .footer-tag { font-size: 12px; }
  .footer-links { gap: 16px 24px; flex-wrap: wrap; }
}