/**
 * OISUMMIT 2026 — shared layout (extends design-system.css)
 */
.oisummit-page { background: var(--color-surface); color: var(--color-text-primary); }

.oisummit-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
}

.oisummit-nav-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-gutter);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.oisummit-nav-logo {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
  text-decoration: none;
  white-space: nowrap;
}

.oisummit-nav-logo span { color: var(--color-text-muted); font-weight: 400; }

.oisummit-nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.oisummit-nav-links a {
  font-size: 13px;
  color: var(--color-text-secondary);
  text-decoration: none;
}

.oisummit-nav-links a:hover { color: var(--color-text-primary); }

.oisummit-hero {
  padding: calc(var(--nav-height) + 56px) 0 72px;
  border-bottom: 1px solid var(--color-border);
}

.oisummit-hero-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-gutter);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(32px, 5vw, 56px);
  align-items: center;
}

.oisummit-eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.oisummit-headline-en {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 20px;
}

.oisummit-headline-ja {
  font-size: clamp(1.25rem, 2.5vw, 1.625rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.45;
  margin-bottom: 20px;
}

.oisummit-lead {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin-bottom: 32px;
}

.oisummit-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.oisummit-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.15s, transform 0.15s, border-color 0.15s;
}

.oisummit-btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.oisummit-btn--primary {
  background: var(--color-cta);
  color: var(--color-cta-text);
}

.oisummit-btn--primary:hover { background: var(--color-cta-hover); transform: translateY(-1px); }

.oisummit-btn--secondary {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.oisummit-btn--secondary:hover {
  border-color: var(--color-border-strong);
  background: var(--color-surface-subtle);
}

.oisummit-demo-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
}

.oisummit-demo-wrap .ari-fv-animation {
  max-width: 293px;
}

.oisummit-section {
  padding: 80px 0;
  border-bottom: 1px solid var(--color-border);
}

.oisummit-section--alt { background: var(--color-surface-subtle); }

.oisummit-section-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-gutter);
}

.oisummit-section-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.oisummit-section h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
}

.oisummit-body {
  max-width: 640px;
  color: var(--color-text-secondary);
  line-height: 1.85;
}

.oisummit-body p + p { margin-top: 14px; }

.oisummit-gap-list {
  list-style: none;
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.oisummit-gap-list li {
  padding: 16px 20px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-surface);
  font-size: 15px;
}

.oisummit-gap-list strong { color: var(--color-text-primary); }

.oisummit-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-accent);
}

.oisummit-flow span { color: var(--color-text-muted); font-weight: 400; }

.oisummit-critical {
  margin-top: 32px;
  padding: 20px 24px;
  border-left: 3px solid var(--color-accent);
  background: var(--color-accent-soft);
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.oisummit-critical__neq {
  display: inline-block;
  margin: 0 0.35em;
  color: var(--color-accent);
}

.oisummit-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 28px;
}

.oisummit-tab {
  padding: 10px 18px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  color: var(--color-text-secondary);
}

.oisummit-tab.is-active {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.oisummit-tab:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.oisummit-segments {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 48px;
}

.oisummit-segment-card {
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s, transform 0.15s;
}

.oisummit-segment-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.oisummit-segment-card h3 {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.oisummit-use-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 24px;
}

.oisummit-use-grid li {
  list-style: none;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  font-size: 14px;
}

.oisummit-form {
  max-width: 640px;
  margin-top: 32px;
}

.oisummit-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.oisummit-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
}

.oisummit-form label.full { grid-column: 1 / -1; }

.oisummit-form input,
.oisummit-form select,
.oisummit-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font: inherit;
  background: var(--color-surface);
}

.oisummit-form textarea { min-height: 120px; resize: vertical; }

.oisummit-form-consent {
  flex-direction: row !important;
  align-items: flex-start;
  gap: 10px !important;
  margin: 20px 0;
  font-size: 12px !important;
  font-weight: 400 !important;
}

.oisummit-form-consent input { width: auto; margin-top: 3px; }

.oisummit-form-honeypot {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.oisummit-form-error { color: var(--color-danger); margin-top: 12px; font-size: 14px; }

.oisummit-form-success {
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-success-soft);
}

.oisummit-footer {
  padding: 48px 0;
  background: var(--color-surface-subtle);
  border-top: 1px solid var(--color-border);
}

.oisummit-footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-gutter);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  font-size: 13px;
  color: var(--color-text-muted);
}

.oisummit-footer a { color: inherit; text-decoration: none; }
.oisummit-footer a:hover { color: var(--color-text-primary); }

.oisummit-showcase-layout {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: calc(var(--nav-height) + 48px) var(--container-gutter) 72px;
  text-align: center;
}

@media (max-width: 900px) {
  .oisummit-hero-inner { grid-template-columns: 1fr; }
  .oisummit-demo-wrap { order: -1; }
  .oisummit-segments { grid-template-columns: 1fr; }
  .oisummit-form-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .oisummit-nav-links { display: none; }
  .oisummit-section { padding: 56px 0; }
  .oisummit-use-grid { grid-template-columns: 1fr; }
  .oisummit-demo-wrap .ari-fv-animation { max-width: 255px; }
}

@media (prefers-reduced-motion: reduce) {
  .oisummit-btn:hover { transform: none; }
  .oisummit-segment-card:hover { transform: none; }
}