/* =========================================================
   CLOUD NATIVE APPLICATION DEVELOPMENT (LIGHT THEME ONLY)
   Unique layout: Node cluster overview + split-column features
   + numbered rail process + accent-bordered CTA
   ========================================================= */

:root {
  --cna-primary:       #1a2e44;         /* FrugalNova deep navy */
  --cna-primary-light: #2c4a6e;
  --cna-text-body:     #4a4a58;
  --cna-text-muted:    #666676;
  --cna-accent:        #B5246A;         /* FrugalNova magenta-rose */
  --cna-accent-hover:  #C94985;
  --cna-accent-subtle: #FAE8F1;         /* FrugalNova accent pale */
  --cna-accent-mid:    #f0b8d4;
  --cna-bg:            #f8f7f4;         /* FrugalNova surface-2 */
  --cna-surface:       #FFFFFF;
  --cna-border:        #e8e4dc;         /* FrugalNova border */
  --cna-border-strong: #d5cfc4;

  --cna-shadow-sm:  0 1px 3px rgba(26, 46, 68, 0.06);
  --cna-shadow-md:  0 4px 12px rgba(26, 46, 68, 0.09);
  --cna-shadow-lg:  0 16px 32px rgba(26, 46, 68, 0.07);

  --cna-radius-sm:  8px;
  --cna-radius:     14px;
  --cna-radius-lg:  22px;
  --cna-section-pad: 64px 20px;
}

/* ─── SHARED UTILITIES ─────────────────────────────────── */
.cna-container {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.cna-section {
  padding: var(--cna-section-pad);
  position: relative;
  z-index: 1;
}

.cna-section-header {
  text-align: center;
  max-width: 580px;
  margin: 0 auto 44px auto;
}

.cna-section-title {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(1.875rem, 4vw, 2.375rem);
  font-weight: 700;
  color: var(--cna-primary);
  margin-bottom: 12px;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.cna-section-desc {
  font-family: 'Inter', sans-serif;
  font-size: 1.0625rem;
  color: var(--cna-text-body);
  line-height: 1.65;
}

/* ─── HERO ─────────────────────────────────────────────── */
.cna-hero {
  padding: 148px 20px 80px;
  background: linear-gradient(160deg, #FAE8F1 0%, #FFFFFF 55%, #f8f7f4 100%);
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  min-height: 50vh;
  border-bottom: 1px solid var(--cna-border);
  position: relative;
  overflow: hidden;
}

/* Subtle geometric background accent */
.cna-hero::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -80px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(181, 36, 106, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.cna-hero-inner {
  max-width: 680px;
  position: relative;
  z-index: 1;
}

.cna-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: var(--cna-accent-subtle);
  color: var(--cna-accent);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 0.8125rem;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  margin-bottom: 22px;
  border: 1px solid var(--cna-accent-mid);
  letter-spacing: 0.01em;
}

.cna-hero-badge svg {
  flex-shrink: 0;
}

.cna-hero-title {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  font-weight: 800;
  color: var(--cna-primary);
  line-height: 1.08;
  letter-spacing: -0.035em;
  margin-bottom: 22px;
}

.cna-hero-desc {
  font-size: 1.125rem;
  color: var(--cna-text-body);
  line-height: 1.65;
  margin-bottom: 36px;
  font-family: 'Inter', sans-serif;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.cna-btn-primary {
  display: inline-block;
  background: var(--cna-primary);
  color: #fff;
  padding: 13px 26px;
  border-radius: var(--cna-radius-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  text-decoration: none;
  transition: background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
  box-shadow: var(--cna-shadow-md);
  letter-spacing: 0.005em;
}

.cna-btn-primary:hover {
  background: var(--cna-accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(181, 36, 106, 0.25);
}

/* ─── OVERVIEW SECTION — Unique node/cluster layout ───── */
.cna-overview {
  background: var(--cna-surface);
  border-bottom: 1px solid var(--cna-border);
}

.cna-overview-layout {
  display: flex;
  flex-direction: column;
  gap: 32px;
  align-items: center;
}

/* Central hub indicator */
.cna-hub {
  display: flex;
  justify-content: center;
}

.cna-hub-core {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--cna-primary) 0%, var(--cna-primary-light) 100%);
  color: #fff;
  padding: 12px 22px;
  border-radius: 100px;
  font-family: 'Outfit', sans-serif;
  font-size: 0.9375rem;
  font-weight: 600;
  box-shadow: 0 6px 16px rgba(15, 23, 42, 0.18);
}

.cna-hub-core svg {
  opacity: 0.9;
  flex-shrink: 0;
}

/* Nodes grid — asymmetric 3+2 layout */
.cna-nodes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  width: 100%;
}

.cna-node {
  background: var(--cna-bg);
  border: 1px solid var(--cna-border);
  border-radius: var(--cna-radius);
  padding: 24px 22px;
  transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
  position: relative;
}

.cna-node::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cna-accent) 0%, var(--cna-accent-hover) 100%);
  border-radius: var(--cna-radius) var(--cna-radius) 0 0;
  opacity: 0;
  transition: opacity 0.28s ease;
}

.cna-node:hover {
  transform: translateY(-4px);
  box-shadow: var(--cna-shadow-md);
  border-color: var(--cna-border-strong);
}

.cna-node:hover::before {
  opacity: 1;
}

/* Last two nodes sit side-by-side centered in the second row (no empty middle gap) */
.cna-nodes-grid .cna-node:nth-child(4) {
  grid-column: 1 / 2;
}
.cna-nodes-grid .cna-node:nth-child(5) {
  grid-column: 2 / 3;
}

.cna-node-icon {
  width: 42px;
  height: 42px;
  background: var(--cna-accent-subtle);
  border: 1px solid var(--cna-accent-mid);
  color: var(--cna-accent);
  border-radius: var(--cna-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  flex-shrink: 0;
}

.cna-node h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--cna-primary);
  margin-bottom: 10px;
  line-height: 1.3;
}

.cna-node p {
  font-size: 0.875rem;
  color: var(--cna-text-muted);
  line-height: 1.55;
}

/* ─── FEATURES SECTION — Split two-column layout ────────── */
.cna-features {
  background: var(--cna-bg);
  border-bottom: 1px solid var(--cna-border);
}

.cna-features-split {
  display: grid;
  grid-template-columns: 1fr 1px 1fr;
  gap: 0 40px;
  align-items: start;
}

.cna-features-divider {
  background: var(--cna-border);
  align-self: stretch;
  border-radius: 2px;
}

.cna-features-col {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.cna-feat-row {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--cna-border);
  transition: background 0.2s ease;
}

.cna-feat-row:last-child {
  border-bottom: none;
}

.cna-feat-icon {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  background: var(--cna-accent-subtle);
  border: 1px solid var(--cna-accent-mid);
  color: var(--cna-accent);
  border-radius: var(--cna-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.25s ease, color 0.25s ease;
}

.cna-feat-row:hover .cna-feat-icon {
  background: var(--cna-accent);
  color: #fff;
  border-color: var(--cna-accent);
}

.cna-feat-text h4 {
  font-family: 'Outfit', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--cna-primary);
  margin-bottom: 5px;
  line-height: 1.3;
}

.cna-feat-text p {
  font-size: 0.875rem;
  color: var(--cna-text-muted);
  line-height: 1.55;
}

/* ─── PROCESS SECTION — Numbered rail layout ─────────────── */
.cna-process {
  background: var(--cna-surface);
  border-bottom: 1px solid var(--cna-border);
}

.cna-process-rail {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
}

/* Connecting line across the top */
.cna-process-rail::before {
  content: '';
  position: absolute;
  top: 22px;
  left: calc(12.5% + 16px);
  right: calc(12.5% + 16px);
  height: 2px;
  background: linear-gradient(90deg, var(--cna-accent-mid) 0%, var(--cna-border-strong) 50%, var(--cna-accent-mid) 100%);
  z-index: 0;
}

.cna-process-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 0 12px;
}

.cna-process-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  position: relative;
  z-index: 1;
}

.cna-badge-num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--cna-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Outfit', sans-serif;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.18);
  flex-shrink: 0;
  transition: background 0.25s ease, transform 0.25s ease;
}

.cna-process-item:hover .cna-badge-num {
  background: var(--cna-accent);
  transform: scale(1.1);
}

.cna-process-card {
  background: var(--cna-bg);
  border: 1px solid var(--cna-border);
  border-radius: var(--cna-radius);
  padding: 22px 18px;
  text-align: center;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
  width: 100%;
}

.cna-process-item:hover .cna-process-card {
  border-color: var(--cna-accent);
  box-shadow: var(--cna-shadow-md);
  transform: translateY(-2px);
}

.cna-process-icon {
  width: 38px;
  height: 38px;
  background: var(--cna-accent-subtle);
  border: 1px solid var(--cna-accent-mid);
  color: var(--cna-accent);
  border-radius: var(--cna-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 14px;
}

.cna-process-card h4 {
  font-family: 'Outfit', sans-serif;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--cna-primary);
  margin-bottom: 8px;
  line-height: 1.3;
}

.cna-process-card p {
  font-size: 0.8125rem;
  color: var(--cna-text-muted);
  line-height: 1.55;
}

/* ─── CTA SECTION ─────────────────────────────────────── */
.cna-cta {
  background: var(--cna-bg);
  padding: 72px 20px;
  text-align: center;
  border-top: 1px solid var(--cna-border);
}

.cna-cta-inner {
  max-width: 580px;
  margin: 0 auto;
  background: var(--cna-surface);
  padding: 48px 36px;
  border-radius: var(--cna-radius-lg);
  border: 1px solid var(--cna-border);
  box-shadow: var(--cna-shadow-lg);
  position: relative;
  overflow: hidden;
}

/* Top accent stripe */
.cna-cta-inner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--cna-accent) 0%, var(--cna-accent-hover) 50%, var(--cna-accent) 100%);
}

.cna-cta-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--cna-accent);
  font-family: 'Inter', sans-serif;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.cna-cta-title {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(1.625rem, 3.5vw, 2.125rem);
  font-weight: 700;
  color: var(--cna-primary);
  margin-bottom: 14px;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.cna-cta-desc {
  font-size: 1rem;
  color: var(--cna-text-body);
  line-height: 1.65;
  margin-bottom: 32px;
  font-family: 'Inter', sans-serif;
}

/* ─── SCROLL REVEAL ─────────────────────────────────────── */
.sw-reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.sw-reveal.sw-in {
  opacity: 1;
  transform: translateY(0);
}
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

/* ─── RESPONSIVE ─────────────────────────────────────────── */
@media (max-width: 900px) {
  .cna-nodes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .cna-nodes-grid .cna-node:nth-child(4),
  .cna-nodes-grid .cna-node:nth-child(5) {
    grid-column: auto;
  }

  .cna-process-rail {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .cna-process-rail::before {
    display: none;
  }
  .cna-process-item {
    align-items: flex-start;
    flex-direction: row;
  }
  .cna-process-card {
    text-align: left;
  }
  .cna-process-icon {
    margin: 0 0 14px;
  }

  .cna-features-split {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .cna-features-divider {
    display: none;
  }
}

@media (max-width: 640px) {
  .cna-hero {
    padding: 120px 20px 60px;
  }
  .cna-hero-title {
    font-size: 2.1rem;
  }
  .cna-nodes-grid {
    grid-template-columns: 1fr;
  }
  .cna-process-rail {
    grid-template-columns: 1fr;
  }
  .cna-process-item {
    flex-direction: column;
    align-items: center;
  }
  .cna-process-card {
    text-align: center;
  }
  .cna-process-icon {
    margin: 0 auto 14px;
  }
  .cna-cta-inner {
    padding: 36px 24px;
  }
}