/* ============================================
   KVATASK SITE — /architecture
   ============================================ */

.ar-hero {
  padding: 140px 0 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.ar-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 30% 30%, rgba(99, 102, 241, 0.10) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 75% 70%, rgba(245, 158, 11, 0.08) 0%, transparent 70%);
  z-index: -1;
}

.ar-hero h1 {
  font-size: var(--display-1);
  font-weight: 800;
  letter-spacing: -0.04em;
  font-family: var(--font-display);
  line-height: 1.04;
  margin-bottom: 20px;
}

.ar-hero h1 .accent {
  background: var(--gradient-mcp);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.ar-hero-sub {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 760px;
  margin: 0 auto;
  line-height: 1.55;
}

/* ===== Block ===== */
.ar-block {
  padding: 80px 0;
}

.ar-block-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.ar-block-grid.reverse > *:first-child { order: 2; }

.ar-block h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  font-family: var(--font-display);
  margin-bottom: 16px;
  line-height: 1.15;
}

.ar-block-text p {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 14px;
}

.ar-block-text strong {
  color: var(--text);
  font-weight: 600;
}

.ar-block-text code {
  background: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
}

.ar-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 24px;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.ar-spec dt {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.ar-spec dd {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  color: var(--text);
}

/* ===== Diagrams ===== */
.ar-diagram {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: 32px;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.ar-diagram svg {
  width: 100%;
  height: auto;
  display: block;
}

/* ===== Tech list ===== */
.ar-tech {
  padding: 100px 0;
  background: var(--bg-primary);
  transition: background 0.4s;
}

.ar-tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 36px;
}

.ar-tech-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.ar-tech-card:hover {
  transform: translateY(-2px);
  border-color: var(--primary-muted);
}

.ar-tech-card-name {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--primary);
  font-weight: 600;
}

.ar-tech-card h3 {
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  font-family: var(--font-display);
  margin: 0;
  line-height: 1.3;
}

.ar-tech-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ===== Security ===== */
.ar-sec {
  padding: 100px 0;
}

.ar-sec-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 36px;
}

.ar-sec-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--primary);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
}

.ar-sec-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
  font-family: var(--font-sans);
  letter-spacing: 0;
}

.ar-sec-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .ar-block-grid { grid-template-columns: 1fr; gap: 32px; }
  .ar-block-grid.reverse > *:first-child { order: 0; }
  .ar-tech-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .ar-hero { padding: 100px 0 32px; }
  .ar-hero-sub { font-size: 1.0625rem; }
  .ar-block { padding: 56px 0; }
  .ar-tech, .ar-sec { padding: 64px 0; }
  .ar-diagram { padding: 20px; }
  .ar-specs { grid-template-columns: 1fr; gap: 10px; }
  .ar-tech-grid, .ar-sec-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .ar-hero { padding: 80px 0 24px; }
  .ar-block { padding: 40px 0; }
  .ar-tech, .ar-sec { padding: 48px 0; }
  .ar-diagram { padding: 16px; }
}