/* ============================================================
   MEMFLAIR — DESIGN SYSTEM
   ============================================================ */

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

:root {
  /* Palette */
  --bg:           #080E1C;
  --bg-alt:       #0C1327;
  --surface:      #111827;
  --surface-2:    #1A2337;
  --border:       rgba(255,255,255,0.07);
  --border-hover: rgba(255,255,255,0.14);

  --blue:         #3B82F6;
  --blue-light:   #60A5FA;
  --violet:       #8B5CF6;
  --violet-light: #A78BFA;
  --cyan:         #06B6D4;
  --green:        #10B981;
  --amber:        #F59E0B;
  --pink:         #EC4899;

  --text:         #F1F5F9;
  --text-muted:   #94A3B8;
  --text-dim:     #475569;

  --grad:         linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);
  --grad-soft:    linear-gradient(135deg, rgba(59,130,246,.15) 0%, rgba(139,92,246,.15) 100%);

  /* Spacing */
  --section-pad:  96px;
  --section-pad-sm: 64px;
  --container:    1200px;
  --container-pad: 24px;

  /* Typography */
  --font: 'Inter', system-ui, -apple-system, sans-serif;

  /* Radius */
  --r-sm:  6px;
  --r-md:  10px;
  --r-lg:  16px;
  --r-xl:  20px;
  --r-2xl: 28px;

  /* Shadow */
  --shadow-card: 0 1px 3px rgba(0,0,0,.4), 0 4px 16px rgba(0,0,0,.25);
  --shadow-glow-blue:   0 0 60px rgba(59,130,246,.2);
  --shadow-glow-violet: 0 0 60px rgba(139,92,246,.2);
}

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

body {
  font-family: var(--font);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

ul { list-style: none; }

/* ── Typography helpers ───────────────────────────────────── */
.gradient-text {
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Layout ───────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: var(--section-pad);
}
.section-alt {
  background-color: var(--bg-alt);
}
.text-center { text-align: center; }

/* ── Section headers ──────────────────────────────────────── */
.section-header {
  max-width: 760px;
  margin-inline: auto;
  margin-bottom: 56px;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--blue-light);
  background: rgba(59,130,246,.1);
  border: 1px solid rgba(59,130,246,.2);
  padding: 5px 12px;
  border-radius: 100px;
  margin-bottom: 18px;
}
.section-title {
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--text);
  margin-bottom: 16px;
}
.section-sub {
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font);
  font-weight: 600;
  font-size: 15px;
  border-radius: var(--r-md);
  cursor: pointer;
  border: none;
  transition: all .18s ease;
  white-space: nowrap;
  text-decoration: none;
}
.btn-primary {
  background: var(--grad);
  color: #fff;
  padding: 13px 24px;
  box-shadow: 0 4px 20px rgba(59,130,246,.35);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 28px rgba(59,130,246,.5);
  filter: brightness(1.08);
}
.btn-secondary {
  background: var(--surface);
  color: var(--text);
  padding: 13px 24px;
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  background: var(--surface-2);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}
.btn-ghost-sm {
  background: transparent;
  color: var(--text-muted);
  padding: 7px 14px;
  font-size: 14px;
  border-radius: var(--r-sm);
}
.btn-ghost-sm:hover { color: var(--text); background: rgba(255,255,255,.05); }
.btn-primary-sm {
  background: var(--grad);
  color: #fff;
  padding: 7px 16px;
  font-size: 14px;
  border-radius: var(--r-sm);
  box-shadow: 0 2px 12px rgba(59,130,246,.3);
}
.btn-primary-sm:hover { filter: brightness(1.1); transform: translateY(-1px); }
.btn-lg { padding: 15px 30px; font-size: 16px; }

/* ── Navbar ───────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: 64px;
  display: flex;
  align-items: center;
  background: rgba(8,14,28,.8);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow .3s;
}
.navbar.scrolled {
  box-shadow: 0 4px 32px rgba(0,0,0,.4);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  color: var(--text);
  transition: opacity .15s;
}
.nav-logo:hover { opacity: .85; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: var(--r-sm);
  transition: color .15s, background .15s;
}
.nav-link:hover { color: var(--text); background: rgba(255,255,255,.05); }
.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  border-radius: var(--r-sm);
}
.toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all .25s ease;
}
.nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Hero Section ─────────────────────────────────────────── */
.hero {
  position: relative;
  padding-top: calc(64px + 80px);
  padding-bottom: 80px;
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  align-items: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.hero-video-overlay {
  position: absolute;
  inset: 0;
  background: rgba(8, 14, 28, 0.62);
}
.hero-gradient {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(59,130,246,.18) 0%, transparent 70%),
              radial-gradient(ellipse 50% 40% at 80% 60%, rgba(139,92,246,.12) 0%, transparent 60%);
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, black 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, black 20%, transparent 75%);
}
.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: .45;
  animation: float 8s ease-in-out infinite;
}
.hero-glow-1 {
  width: 500px; height: 500px;
  background: rgba(59,130,246,.2);
  top: -100px; left: -100px;
}
.hero-glow-2 {
  width: 400px; height: 400px;
  background: rgba(139,92,246,.18);
  top: 50px; right: -80px;
  animation-delay: -4s;
}
@keyframes float {
  0%, 100% { transform: translateY(0px) scale(1); }
  50%       { transform: translateY(-20px) scale(1.04); }
}

.hero-container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-content { max-width: 560px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--blue-light);
  background: rgba(59,130,246,.1);
  border: 1px solid rgba(59,130,246,.2);
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 24px;
}
.badge-pulse {
  display: block;
  width: 7px;
  height: 7px;
  background: var(--blue-light);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: .5; transform: scale(.75); }
}

.hero-headline {
  font-size: clamp(32px, 5vw, 54px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -.03em;
  margin-bottom: 20px;
  color: var(--text);
}
.hero-sub {
  font-size: 18px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 36px;
}
.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}
.hero-trust {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.trust-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-dim);
}
.trust-pills {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.trust-pill {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 100px;
}

/* ── Hero Visual / Diagram ────────────────────────────────── */
.hero-visual {
  width: 100%;
  display: flex;
  justify-content: center;
}
.diagram-wrapper {
  width: 100%;
  max-width: 560px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}

/* Source / Output node rows */
.diagram-sources, .diagram-outputs {
  width: 100%;
  display: flex;
  justify-content: space-around;
}
.diagram-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--text-muted);
  opacity: 0;
  animation: nodeIn .4s ease forwards;
  animation-delay: var(--delay, 0s);
}
@keyframes nodeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.src-node svg, .out-node svg {
  padding: 8px;
  width: 36px; height: 36px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  stroke: var(--text-muted);
  transition: border-color .2s;
}
.src-node:hover svg, .out-node:hover svg {
  border-color: var(--blue-light);
  stroke: var(--blue-light);
}
.out-node svg { stroke: var(--violet-light); }
.out-node:hover svg { border-color: var(--violet-light); stroke: var(--violet-light); }

/* Flow lines SVG */
.diagram-flow {
  width: 100%;
  height: 56px;
}
.flow-svg { width: 100%; height: 100%; }
.flow-line {
  animation: dash 1.5s linear infinite;
  animation-delay: var(--delay, 0s);
}
.flow-out {
  animation-direction: reverse;
}
@keyframes dash {
  from { stroke-dashoffset: 20; }
  to   { stroke-dashoffset: 0; }
}

/* Core card */
.diagram-core {
  position: relative;
  width: 100%;
  display: flex;
  justify-content: center;
  padding-block: 4px;
}
.core-pulse-ring {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  max-width: 340px;
  height: 100%;
  border: 1px solid rgba(59,130,246,.2);
  border-radius: var(--r-xl);
  animation: ringPulse 3s ease-in-out infinite;
  pointer-events: none;
}
.core-ring-2 {
  animation-delay: -1.5s;
  border-color: rgba(139,92,246,.15);
  transform: translate(-50%, -50%) scale(1.12);
}
@keyframes ringPulse {
  0%, 100% { opacity: .6; }
  50%       { opacity: .15; }
}
.core-card {
  background: var(--surface);
  border: 1px solid rgba(59,130,246,.3);
  border-radius: var(--r-xl);
  padding: 20px 28px;
  width: 100%;
  max-width: 340px;
  box-shadow: 0 0 40px rgba(59,130,246,.1), var(--shadow-card);
  position: relative;
  z-index: 1;
}
.core-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.core-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}
.core-label {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: .04em;
}
.core-stats {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.core-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  flex: 1;
}
.cs-num {
  font-size: 18px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}
.cs-lbl {
  font-size: 10px;
  font-weight: 500;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: .05em;
}
.cs-divider {
  width: 1px;
  height: 28px;
  background: var(--border);
  flex-shrink: 0;
}

/* ── Fade-up Animations ───────────────────────────────────── */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .55s ease, transform .55s ease;
  transition-delay: var(--fade-delay, 0s);
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-up-delay { --fade-delay: 0.2s; }

/* ── Card Grid ────────────────────────────────────────────── */
.card-grid {
  display: grid;
  gap: 20px;
}
.grid-3 { grid-template-columns: repeat(3, 1fr); }

/* ── Problem Cards ────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 28px;
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}
.card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}
.card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
}
.card-icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.icon-blue  { background: rgba(59,130,246,.12);  color: var(--blue-light);  stroke: var(--blue-light); }
.icon-violet{ background: rgba(139,92,246,.12); color: var(--violet-light); stroke: var(--violet-light); }
.card-icon-wrap svg { stroke: inherit; }

/* ── Solution Flow ────────────────────────────────────────── */
.solution-flow {
  display: flex;
  align-items: flex-start;
  gap: 0;
  margin-bottom: 48px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: 40px 32px;
}
.flow-step {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 12px;
}
.flow-step-num {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--blue-light);
  background: rgba(59,130,246,.1);
  border: 1px solid rgba(59,130,246,.2);
  padding: 3px 10px;
  border-radius: 100px;
}
.flow-step-icon {
  width: 56px; height: 56px;
  border-radius: var(--r-lg);
  background: var(--grad-soft);
  border: 1px solid rgba(59,130,246,.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-light);
}
.flow-step-icon svg { stroke: currentColor; }
.flow-step h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
}
.flow-step p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 200px;
}
.flow-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 8px;
  color: var(--text-dim);
  margin-top: 36px;
  flex-shrink: 0;
}

.solution-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 28px;
}
.sf-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.55;
}
.sf-item svg { flex-shrink: 0; margin-top: 2px; }

/* ── Feature Cards ────────────────────────────────────────── */
.card-feature {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 28px;
}
.feature-card-icon {
  width: 48px; height: 48px;
  border-radius: var(--r-md);
  background: var(--grad-soft);
  border: 1px solid rgba(59,130,246,.18);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-light);
  margin-bottom: 6px;
  transition: background .2s;
}
.card-feature:hover .feature-card-icon { background: rgba(59,130,246,.2); }
.feature-card-icon svg { stroke: currentColor; }
.feature-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--blue-light);
}
.card-feature h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}
.card-feature p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ── Use Case Cards ───────────────────────────────────────── */
.card-usecase {
  position: relative;
  overflow: hidden;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.usecase-accent {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent, var(--blue));
  border-radius: var(--r-lg) var(--r-lg) 0 0;
}
.usecase-icon {
  width: 44px; height: 44px;
  border-radius: var(--r-md);
  background: rgba(255,255,255,.05);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent, var(--blue-light));
  transition: background .2s, border-color .2s;
}
.card-usecase:hover .usecase-icon {
  background: rgba(255,255,255,.08);
  border-color: var(--border-hover);
}
.usecase-icon svg { stroke: currentColor; }
.card-usecase h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}
.card-usecase p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ── Differentiation Grid ─────────────────────────────────── */
.diff-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1.15fr;
  gap: 20px;
  align-items: start;
}
.diff-col {
  border-radius: var(--r-xl);
  padding: 32px 28px;
  border: 1px solid var(--border);
  position: relative;
}
.diff-col-muted {
  background: var(--surface);
  opacity: .75;
}
.diff-col-featured {
  background: var(--surface);
  border-color: rgba(59,130,246,.4);
  box-shadow: 0 0 40px rgba(59,130,246,.1), var(--shadow-card);
}
.diff-featured-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--grad);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 4px 16px;
  border-radius: 100px;
  white-space: nowrap;
}
.diff-col-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}
.diff-col-header h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
}
.diff-icon {
  width: 36px; height: 36px;
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.diff-icon-grey {
  background: rgba(255,255,255,.06);
  color: var(--text-dim);
}
.diff-icon-grey svg { stroke: var(--text-dim); }
.diff-icon-blue {
  background: rgba(59,130,246,.12);
}
.diff-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.diff-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.5;
}
.diff-x    { color: #F87171; font-size: 13px; flex-shrink: 0; }
.diff-check{ color: var(--green); font-size: 13px; flex-shrink: 0; }
.diff-list-positive li { color: var(--text); }

/* ── Trust / Security Grid ────────────────────────────────── */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.trust-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 24px;
  display: flex;
  gap: 18px;
  align-items: flex-start;
  transition: border-color .2s;
}
.trust-item:hover { border-color: var(--border-hover); }
.trust-icon {
  width: 42px; height: 42px;
  border-radius: var(--r-md);
  background: rgba(59,130,246,.1);
  border: 1px solid rgba(59,130,246,.15);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--blue-light);
}
.trust-icon svg { stroke: currentColor; }
.trust-item h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}
.trust-item p {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ── Architecture Diagram ─────────────────────────────────── */
.arch-diagram {
  max-width: 820px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.arch-arrow {
  text-align: center;
  font-size: 22px;
  color: var(--text-dim);
  line-height: 2;
  letter-spacing: 0;
}
.arch-layer {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
  transition: border-color .2s;
}
.arch-layer:hover { border-color: var(--border-hover); }
.arch-core-layer {
  border-color: rgba(59,130,246,.35);
  background: var(--surface-2);
  box-shadow: 0 0 40px rgba(59,130,246,.1);
  position: relative;
  overflow: hidden;
}
.arch-core-glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 100% at 50% 50%, rgba(59,130,246,.06) 0%, transparent 70%);
  pointer-events: none;
}
.arch-layer-left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  min-width: 180px;
}
.arch-layer-num {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: rgba(255,255,255,.07);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  flex-shrink: 0;
}
.arch-num-core {
  background: var(--grad);
  border: none;
  color: #fff;
}
.arch-layer-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
}
.arch-core-name {
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}
.arch-core-badge {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  border: 1px solid rgba(59,130,246,.3);
  padding: 2px 8px;
  border-radius: 100px;
  -webkit-text-fill-color: initial;
  color: var(--blue-light);
}
.arch-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.arch-chip {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: var(--r-sm);
  transition: border-color .15s, color .15s;
}
.arch-layer:hover .arch-chip {
  border-color: var(--border-hover);
}
.arch-chip-core {
  background: rgba(59,130,246,.08);
  border-color: rgba(59,130,246,.2);
  color: var(--blue-light);
}

/* ── Metrics Grid ─────────────────────────────────────────── */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 28px;
}
.metric-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 36px 24px;
  text-align: center;
  transition: border-color .2s, transform .2s;
}
.metric-card:hover {
  border-color: rgba(59,130,246,.3);
  transform: translateY(-2px);
}
.metric-num {
  font-size: 48px;
  font-weight: 900;
  letter-spacing: -.03em;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 12px;
}
.metric-label {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.5;
}
.metrics-note {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 12px;
  color: var(--text-dim);
  max-width: 680px;
  margin-inline: auto;
  line-height: 1.6;
  text-align: center;
  justify-content: center;
}
.metrics-note svg { flex-shrink: 0; stroke: var(--text-dim); margin-top: 1px; }

/* ── CTA Section ──────────────────────────────────────────── */
.cta-section {
  position: relative;
  overflow: hidden;
  padding-block: var(--section-pad);
}
.cta-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.cta-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
}
.cta-glow-1 {
  width: 600px; height: 400px;
  background: rgba(59,130,246,.15);
  top: -100px; left: 50%;
  transform: translateX(-60%);
}
.cta-glow-2 {
  width: 400px; height: 300px;
  background: rgba(139,92,246,.12);
  bottom: -80px; right: 10%;
}
.cta-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 80% at 50% 50%, black 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 80% at 50% 50%, black 20%, transparent 75%);
}
.cta-container {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 680px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}
.cta-title {
  font-size: clamp(28px, 4.5vw, 46px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -.03em;
  margin-bottom: 16px;
  margin-top: 20px;
}
.cta-sub {
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 560px;
}
.cta-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ── Footer ───────────────────────────────────────────────── */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding-top: 64px;
  padding-bottom: 36px;
}
.footer-top {
  margin-bottom: 48px;
}
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-logo { font-size: 16px; }
.footer-tagline {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}
.footer-tagline2 {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.6;
}
.footer-nav {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
}
.footer-col h5 {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 16px;
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col a {
  font-size: 13px;
  color: var(--text-dim);
  transition: color .15s;
}
.footer-col a:hover { color: var(--text); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--text-dim);
}
.footer-legal {
  display: flex;
  gap: 20px;
}
.footer-legal a {
  font-size: 13px;
  color: var(--text-dim);
  transition: color .15s;
}
.footer-legal a:hover { color: var(--text); }

/* ── Responsive ───────────────────────────────────────────── */

/* Tablet: ≤ 1024px */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .hero-content { max-width: 100%; }
  .hero-visual { display: none; }

  .grid-3 { grid-template-columns: repeat(2, 1fr); }

  .diff-grid { grid-template-columns: 1fr; }
  .diff-col-muted { display: none; }
  .diff-col-featured { max-width: 560px; margin-inline: auto; width: 100%; }

  .trust-grid { grid-template-columns: 1fr 1fr; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }

  .footer-top { grid-template-columns: 1fr; gap: 40px; }
  .footer-nav { grid-template-columns: repeat(3, 1fr); }
}

/* Mobile: ≤ 768px */
@media (max-width: 768px) {
  :root {
    --section-pad: var(--section-pad-sm);
  }

  /* Navbar */
  .nav-links {
    position: fixed;
    top: 64px; left: 0; right: 0;
    background: rgba(8,14,28,.97);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 20px var(--container-pad);
    gap: 4px;
    display: none;
    z-index: 999;
  }
  .nav-links.open { display: flex; }
  .nav-link { font-size: 16px; padding: 10px 12px; }
  .nav-actions { display: none; }
  .nav-toggle { display: flex; }

  /* Hero */
  .hero { padding-top: calc(64px + 48px); }
  .hero-headline { font-size: 32px; }
  .hero-sub { font-size: 16px; }
  .hero-ctas { flex-direction: column; align-items: flex-start; }

  /* Grids */
  .grid-3 { grid-template-columns: 1fr; }
  .diff-grid { grid-template-columns: 1fr; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-grid { grid-template-columns: 1fr; }

  /* Solution flow */
  .solution-flow {
    flex-direction: column;
    padding: 28px 20px;
    gap: 28px;
  }
  .flow-arrow { transform: rotate(90deg); margin: 0 auto; }
  .solution-features { grid-template-columns: 1fr; }

  /* Architecture */
  .arch-layer { flex-direction: column; align-items: flex-start; gap: 16px; }
  .arch-layer-left { min-width: unset; }

  /* Footer */
  .footer-nav { grid-template-columns: repeat(2, 1fr); }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* Small mobile: ≤ 480px */
@media (max-width: 480px) {
  .metrics-grid { grid-template-columns: 1fr; }
  .footer-nav { grid-template-columns: 1fr 1fr; }
  .cta-buttons { flex-direction: column; align-items: stretch; }
  .cta-buttons .btn { justify-content: center; }
  .metric-num { font-size: 40px; }
}