/* =============================================
   株式会社連九 - Custom Styles
   藍白基調・モダンコーポレート
   ============================================= */

/* ---------------------------------------------
   CSS Variables
   --------------------------------------------- */
:root {
  /* Main palette */
  --rn-blue-900: #1e3a5f;
  --rn-blue-800: #1e40af;
  --rn-blue-600: #2563eb;
  --rn-blue-500: #3b82f6;
  --rn-blue-400: #60a5fa;
  --rn-blue-100: #dbeafe;
  --rn-blue-50:  #eff6ff;

  /* Neutrals */
  --rn-white:    #ffffff;
  --rn-slate-50: #f8fafc;
  --rn-slate-100:#f1f5f9;
  --rn-slate-200:#e2e8f0;
  --rn-slate-400:#94a3b8;
  --rn-slate-600:#475569;
  --rn-slate-800:#1e293b;
  --rn-slate-900:#0f172a;

  /* Typography */
  --rn-font: 'Noto Sans JP', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', Meiryo, sans-serif;
  --rn-font-en: 'Inter', 'Helvetica Neue', Arial, sans-serif;

  /* Spacing */
  --rn-section-pad: clamp(4rem, 8vw, 8rem);
  --rn-container: min(92%, 1200px);

  /* Shadows */
  --rn-shadow-sm: 0 1px 3px rgba(0,0,0,.08);
  --rn-shadow-md: 0 4px 20px rgba(0,0,0,.1);
  --rn-shadow-lg: 0 10px 40px rgba(0,0,0,.12);
  --rn-shadow-card: 0 0 0 1px rgba(0,0,0,.04), 0 2px 12px rgba(0,0,0,.06);

  /* Transitions */
  --rn-ease: cubic-bezier(0.25, 0.1, 0.25, 1);
  --rn-ease-out: cubic-bezier(0, 0, 0.2, 1);
}

/* ---------------------------------------------
   Reset / Base
   --------------------------------------------- */
body {
  font-family: var(--rn-font);
  color: var(--rn-slate-800);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Kill Lightning default slide/page header spacing on front page */
.home .mainSection,
.home .siteContent {
  padding-top: 0 !important;
  margin-top: 0 !important;
}

.home .siteContent > .container {
  max-width: 100%;
  padding: 0;
}

.home .entry-content,
.home .entry-body {
  margin: 0;
  padding: 0;
}

/* ---------------------------------------------
   Navigation bar - Lightning G3
   --------------------------------------------- */
#site-header,
.site-header {
  position: fixed !important;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rn-slate-200);
  transition: background 0.3s var(--rn-ease), box-shadow 0.3s var(--rn-ease);
}

#site-header.scrolled,
.site-header.scrolled {
  background: rgba(255,255,255,0.98);
  box-shadow: var(--rn-shadow-sm);
}

#site-header .site-header-logo img,
.site-header .site-header-logo img {
  max-height: 36px;
}

/* ---------------------------------------------
   Hero Section
   --------------------------------------------- */
.rn-hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--rn-blue-900) 0%, var(--rn-blue-800) 50%, var(--rn-blue-600) 100%);
  overflow: hidden;
}

.rn-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 30% 50%, rgba(59,130,246,0.3) 0%, transparent 70%),
    radial-gradient(ellipse 60% 80% at 80% 20%, rgba(96,165,250,0.15) 0%, transparent 60%);
}

.rn-hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--rn-white);
  padding: 2rem;
}

.rn-hero__overline {
  font-family: var(--rn-font-en);
  font-size: clamp(0.75rem, 1.2vw, 0.9rem);
  letter-spacing: 0.25em;
  text-transform: uppercase;
  opacity: 0;
  animation: rnFadeUp 0.8s var(--rn-ease-out) 0.2s forwards;
}

.rn-hero__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  margin: 0.5rem 0;
  line-height: 1.25;
  opacity: 0;
  animation: rnFadeUp 0.8s var(--rn-ease-out) 0.4s forwards;
}

.rn-hero__tagline {
  font-size: clamp(1rem, 2vw, 1.35rem);
  font-weight: 400;
  opacity: 0;
  margin-top: 1rem;
  line-height: 1.7;
  animation: rnFadeUp 0.8s var(--rn-ease-out) 0.6s forwards;
}

.rn-hero__scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--rn-font-en);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: rgba(255,255,255,0.6);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  opacity: 0;
  animation: rnFadeUp 0.8s var(--rn-ease-out) 1s forwards;
}

.rn-hero__scroll::after {
  content: '';
  width: 1px;
  height: 48px;
  background: rgba(255,255,255,0.3);
  animation: rnScrollLine 2s ease-in-out infinite;
}

/* ---------------------------------------------
   Section Common
   --------------------------------------------- */
.rn-section {
  padding: var(--rn-section-pad) 0;
}

.rn-container {
  width: var(--rn-container);
  margin: 0 auto;
}

.rn-section__label {
  display: inline-block;
  font-family: var(--rn-font-en);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--rn-blue-600);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}

.rn-section__title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--rn-slate-900);
  margin: 0 0 1rem;
  letter-spacing: 0.03em;
}

.rn-section__title--center {
  text-align: center;
}

.rn-section__lead {
  font-size: 1.05rem;
  color: var(--rn-slate-600);
  line-height: 1.8;
  max-width: 640px;
}

.rn-section__lead--center {
  text-align: center;
  margin: 0 auto 3rem;
}

/* ---------------------------------------------
   Business Cards
   --------------------------------------------- */
.rn-business {
  background: var(--rn-white);
}

.rn-business__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.rn-business__card {
  position: relative;
  padding: 3rem 2.5rem;
  background: var(--rn-white);
  border-radius: 16px;
  box-shadow: var(--rn-shadow-card);
  transition: transform 0.35s var(--rn-ease),
              box-shadow 0.35s var(--rn-ease);
  overflow: hidden;
}

.rn-business__card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--rn-blue-600), var(--rn-blue-400));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--rn-ease);
}

.rn-business__card:hover {
  transform: translateY(-6px);
  box-shadow: var(--rn-shadow-lg);
}

.rn-business__card:hover::before {
  transform: scaleX(1);
}

.rn-business__card-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--rn-blue-50);
  color: var(--rn-blue-600);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
}

.rn-business__card-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--rn-slate-900);
  margin: 0 0 0.75rem;
}

.rn-business__card-desc {
  font-size: 0.95rem;
  color: var(--rn-slate-600);
  line-height: 1.8;
  margin: 0 0 1.5rem;
}

.rn-business__card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--rn-blue-600);
  text-decoration: none;
  transition: gap 0.3s var(--rn-ease);
}

.rn-business__card-link:hover {
  gap: 0.7rem;
  color: var(--rn-blue-800);
}

/* ---------------------------------------------
   Product Teaser
   --------------------------------------------- */
.rn-products {
  background: var(--rn-slate-50);
}

.rn-products__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.rn-products__card {
  position: relative;
  background: var(--rn-white);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--rn-shadow-card);
  transition: transform 0.35s var(--rn-ease),
              box-shadow 0.35s var(--rn-ease);
}

.rn-products__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--rn-shadow-md);
}

.rn-products__card-img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  background: var(--rn-slate-100);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--rn-slate-400);
  font-size: 0.85rem;
}

.rn-products__card-body {
  padding: 1.5rem;
}

.rn-products__card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--rn-slate-900);
  margin: 0 0 0.5rem;
}

.rn-products__card-count {
  font-size: 0.8rem;
  color: var(--rn-slate-400);
}

.rn-products__more {
  text-align: center;
  margin-top: 3rem;
}

.rn-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2.2rem;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s var(--rn-ease);
}

.rn-btn--primary {
  background: var(--rn-blue-600);
  color: var(--rn-white);
}

.rn-btn--primary:hover {
  background: var(--rn-blue-800);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37,99,235,0.3);
  color: var(--rn-white);
}

.rn-btn--outline {
  background: transparent;
  color: var(--rn-blue-600);
  box-shadow: inset 0 0 0 2px var(--rn-blue-600);
}

.rn-btn--outline:hover {
  background: var(--rn-blue-600);
  color: var(--rn-white);
}

/* ---------------------------------------------
   Philosophy
   --------------------------------------------- */
.rn-philosophy {
  background: var(--rn-white);
}

.rn-philosophy__inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.rn-philosophy__text {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  color: var(--rn-slate-600);
  line-height: 2.2;
}

.rn-philosophy__text strong {
  color: var(--rn-slate-900);
}

.rn-philosophy__link {
  display: inline-block;
  margin-top: 2rem;
}

/* ---------------------------------------------
   News Section
   --------------------------------------------- */
.rn-news {
  background: var(--rn-slate-50);
}

.rn-news__list {
  list-style: none;
  margin: 3rem 0 0;
  padding: 0;
}

.rn-news__item {
  border-bottom: 1px solid var(--rn-slate-200);
  padding: 1.2rem 0;
}

.rn-news__item:first-child {
  border-top: 1px solid var(--rn-slate-200);
}

.rn-news__item a {
  display: flex;
  gap: 1rem;
  align-items: baseline;
  text-decoration: none;
  color: var(--rn-slate-800);
  transition: color 0.25s var(--rn-ease);
}

.rn-news__item a:hover {
  color: var(--rn-blue-600);
}

.rn-news__date {
  font-family: var(--rn-font-en);
  font-size: 0.85rem;
  color: var(--rn-slate-400);
  white-space: nowrap;
  min-width: 7em;
}

.rn-news__title {
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ---------------------------------------------
   Footer
   --------------------------------------------- */
.siteFooter {
  background: var(--rn-slate-900) !important;
  color: var(--rn-slate-400) !important;
  padding: 3rem 0 !important;
}

.siteFooter a {
  color: var(--rn-slate-400) !important;
}

.siteFooter a:hover {
  color: var(--rn-white) !important;
}

/* ---------------------------------------------
   Animations
   --------------------------------------------- */
@keyframes rnFadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes rnScrollLine {
  0%, 100% { transform: scaleY(1); transform-origin: top; }
  50% { transform: scaleY(0.3); transform-origin: top; }
}

/* Scroll-triggered reveal */
.rn-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--rn-ease-out),
              transform 0.7s var(--rn-ease-out);
}

.rn-reveal--visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays */
.rn-reveal--d1 { transition-delay: 0.1s; }
.rn-reveal--d2 { transition-delay: 0.2s; }
.rn-reveal--d3 { transition-delay: 0.3s; }

/* ---------------------------------------------
   Responsive
   --------------------------------------------- */
@media (max-width: 768px) {
  .rn-business__grid {
    grid-template-columns: 1fr;
  }

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

  .rn-business__card {
    padding: 2rem 1.5rem;
  }

  .rn-news__item a {
    flex-direction: column;
    gap: 0.25rem;
  }

  .rn-news__date {
    min-width: auto;
  }
}

@media (max-width: 480px) {
  .rn-products__grid {
    grid-template-columns: 1fr;
  }
}

/* ---------------------------------------------
   Utility: hide Lightning elements on front page
   --------------------------------------------- */
.home .page-header,
.home .breadcrumb,
.home .sub-section-title,
.home header.entry-header {
  display: none !important;
}