/* =========================================================
   Supply Connect — Modern Design System
========================================================= */
:root {
  --c-bg:        #f4f7fb;
  --c-surface:   #ffffff;
  --c-navy:      #0a1628;
  --c-navy-mid:  #132238;
  --c-accent:    #00b4d8;
  --c-accent-2:  #0077b6;
  --c-gold:      #c9a227;
  --c-text:      #1a2b42;
  --c-muted:     #5c6f88;
  --c-border:    rgba(10, 22, 40, 0.09);
  --c-glass:     rgba(255, 255, 255, 0.82);

  --gradient-hero: linear-gradient(145deg, #0a1628 0%, #132238 45%, #0d3d5c 100%);
  --gradient-accent: linear-gradient(135deg, #00b4d8, #0077b6);
  --gradient-mesh: radial-gradient(ellipse 80% 60% at 20% 40%, rgba(0,180,216,.18), transparent),
                   radial-gradient(ellipse 60% 50% at 80% 20%, rgba(0,119,182,.15), transparent);

  --shadow-sm:  0 2px 8px rgba(10,22,40,.06);
  --shadow-md:  0 12px 40px rgba(10,22,40,.1);
  --shadow-lg:  0 24px 64px rgba(10,22,40,.14);

  --radius:     18px;
  --radius-sm:  12px;
  --radius-pill: 999px;
  --header-h:   76px;
  --container:  1200px;
  --gap-pc:     120px;
  --gap-tb:     80px;
  --gap-sp:     64px;

  --font-ja: "Noto Sans JP", "Yu Gothic", "Hiragino Sans", sans-serif;
  --font-en: "DM Sans", "Inter", sans-serif;
  --ease: cubic-bezier(.4, 0, .2, 1);
  --transition: .35s var(--ease);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-ja);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body.lang-en { font-family: var(--font-en); }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
ul { list-style: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 80px);
}

/* ---- UTILITIES ---- */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 14px;
}

.section-label::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 2px;
}

.section-title {
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  color: var(--c-navy);
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -.02em;
}

body.lang-en .section-title { font-family: var(--font-en); font-weight: 600; }

.section-subtitle {
  font-size: clamp(14px, 2vw, 16px);
  color: var(--c-muted);
  max-width: 600px;
  line-height: 1.85;
}

.section-header { text-align: center; margin-bottom: clamp(40px, 6vw, 72px); }
.section-header .section-subtitle { margin: 0 auto; }

.accent-line {
  display: block;
  width: 48px;
  height: 3px;
  background: var(--gradient-accent);
  margin: 20px auto 24px;
  border-radius: 3px;
}

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font-en);
  letter-spacing: .04em;
  cursor: pointer;
  border: none;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: 0 4px 16px rgba(0,119,182,.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0,119,182,.4);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--c-navy);
  border: 2px solid var(--c-navy);
}

.btn-outline:hover {
  background: var(--c-navy);
  color: #fff;
  transform: translateY(-2px);
}

.btn-ghost {
  background: rgba(10,22,40,.06);
  color: var(--c-navy);
}

.btn-ghost:hover {
  background: var(--c-navy);
  color: #fff;
  transform: translateY(-2px);
}

.btn-glass {
  background: rgba(255,255,255,.15);
  color: #fff;
  border: 1px solid rgba(255,255,255,.3);
  backdrop-filter: blur(8px);
}

.btn-glass:hover {
  background: rgba(255,255,255,.25);
  color: #fff;
  transform: translateY(-2px);
}

/* ---- FADE IN ---- */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}

.fade-in.visible { opacity: 1; transform: translateY(0); }

/* =========================================================
   HEADER
========================================================= */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}

#site-header.scrolled {
  box-shadow: var(--shadow-md);
}

#site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 16px;
}

.site-logo img { height: 36px; width: auto; }

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(16px, 2.5vw, 32px);
}

.site-nav a {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--c-text);
  position: relative;
  padding: 4px 0;
}

.site-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  transition: width var(--transition);
  border-radius: 2px;
}

.site-nav a:hover { color: var(--c-accent-2); }
.site-nav a:hover::after { width: 100%; }
.site-nav a.current { color: var(--c-accent-2); }
.site-nav a.current::after { width: 100%; }

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.header-phone {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 600;
  color: var(--c-navy);
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  background: rgba(0,180,216,.08);
  border: 1px solid rgba(0,180,216,.2);
  transition: background var(--transition), transform var(--transition);
}

.header-phone:hover {
  background: rgba(0,180,216,.15);
  color: var(--c-accent-2);
  transform: translateY(-1px);
}

.header-phone i { color: var(--c-accent); font-size: 12px; }

.lang-switch {
  display: flex;
  background: rgba(10,22,40,.06);
  border-radius: var(--radius-pill);
  padding: 3px;
}

.lang-btn {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .06em;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  border: none;
  background: transparent;
  color: var(--c-muted);
  cursor: pointer;
  transition: all var(--transition);
}

.lang-btn.active {
  background: var(--c-navy);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 6px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--c-navy);
  border-radius: 2px;
  transition: all var(--transition);
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: var(--c-glass);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--c-border);
  z-index: 999;
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s var(--ease), padding .4s var(--ease);
}

.mobile-nav.open { max-height: 520px; padding: 12px 0 20px; }

.mobile-nav a {
  display: flex;
  align-items: center;
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--c-text);
  padding: 14px clamp(20px, 5vw, 80px);
  border-bottom: 1px solid var(--c-border);
  transition: background var(--transition), color var(--transition);
}

.mobile-nav a:hover { color: var(--c-accent-2); background: rgba(0,180,216,.06); }

.mobile-nav .mobile-phone {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px clamp(20px, 5vw, 80px);
  font-weight: 600;
  color: var(--c-accent-2);
}

/* =========================================================
   HERO (TOP)
========================================================= */
#hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: var(--header-h);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
}

.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-mesh);
}

.hero-bg-image {
  position: absolute;
  inset: 0;
  background: url('../images/hero.jpg') center / cover no-repeat;
  opacity: .35;
  mix-blend-mode: luminosity;
}

.hero-grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black, transparent);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #fff;
  padding: 40px 20px;
  max-width: 860px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.2);
  backdrop-filter: blur(8px);
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: rgba(255,255,255,.8);
  margin-bottom: 28px;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-accent);
  animation: pulse 2s ease infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .5; transform: scale(1.3); }
}

.hero-title {
  font-size: clamp(32px, 6vw, 58px);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 24px;
  letter-spacing: -.03em;
  text-shadow: 0 4px 32px rgba(0,0,0,.2);
}

body.lang-en .hero-title { font-family: var(--font-en); }

.hero-sub {
  font-size: clamp(15px, 2.2vw, 18px);
  line-height: 1.9;
  color: rgba(255,255,255,.82);
  margin-bottom: 40px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  align-items: center;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 36px;
  background: #fff;
  color: var(--c-navy);
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  box-shadow: 0 8px 32px rgba(0,0,0,.2);
}

.hero-cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 48px rgba(0,0,0,.28);
  color: var(--c-navy);
}

/* ---- STATS STRIP ---- */
.hero-stats {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255,255,255,.1);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 64px;
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,.15);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.hero-stat {
  padding: 20px 16px;
  background: rgba(255,255,255,.06);
  text-align: center;
}

.hero-stat-num {
  font-family: var(--font-en);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-accent);
  margin-bottom: 4px;
}

.hero-stat-label {
  font-size: 11px;
  color: rgba(255,255,255,.65);
  letter-spacing: .05em;
}

/* =========================================================
   BUSINESS
========================================================= */
#business {
  padding: var(--gap-pc) 0;
  background: var(--c-surface);
}

.business-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.business-card {
  position: relative;
  background: var(--c-bg);
  border-radius: var(--radius);
  padding: clamp(28px, 4vw, 44px);
  border: 1px solid var(--c-border);
  transition: transform var(--transition), box-shadow var(--transition);
  overflow: hidden;
}

.business-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition);
}

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

.business-card:hover::before { opacity: 1; }

.business-icon {
  width: 56px;
  height: 56px;
  background: var(--gradient-accent);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  box-shadow: 0 8px 24px rgba(0,119,182,.25);
}

.business-icon i { font-size: 22px; color: #fff; }

.business-title {
  font-size: clamp(18px, 2.5vw, 22px);
  font-weight: 700;
  color: var(--c-navy);
  margin-bottom: 14px;
  line-height: 1.35;
}

body.lang-en .business-title { font-family: var(--font-en); }

.business-desc {
  font-size: 14px;
  line-height: 1.9;
  color: var(--c-muted);
  margin-bottom: 28px;
}

.business-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* =========================================================
   TOOLS
========================================================= */
#tools {
  padding: var(--gap-pc) 0;
  background: var(--c-bg);
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.tool-card {
  display: flex;
  gap: 28px;
  align-items: flex-start;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: clamp(24px, 3vw, 40px);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.tool-card-icon {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  background: var(--c-navy);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: #fff;
}

.tool-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-navy);
  margin-bottom: 10px;
}

body.lang-en .tool-card-title { font-family: var(--font-en); }

.tool-card-desc {
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-muted);
  margin-bottom: 16px;
}

.tool-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.tool-tag {
  padding: 4px 12px;
  background: rgba(0,180,216,.1);
  color: var(--c-accent-2);
  border-radius: var(--radius-pill);
  font-size: 11px;
  font-weight: 600;
  font-family: var(--font-en);
}

/* =========================================================
   COMPANY
========================================================= */
#company {
  padding: var(--gap-pc) 0;
  background: var(--c-surface);
}

.company-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.company-row {
  display: contents;
}

.company-row > dt,
.company-row > dd {
  padding: 20px clamp(16px, 3vw, 32px);
  border-bottom: 1px solid var(--c-border);
  font-size: 14px;
  line-height: 1.7;
}

.company-row > dt {
  background: var(--c-bg);
  font-weight: 700;
  color: var(--c-navy);
  font-size: 13px;
  display: flex;
  align-items: center;
}

.company-row > dd {
  background: var(--c-surface);
  color: var(--c-text);
}

.company-row > dd a {
  color: var(--c-accent-2);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.company-row > dd a:hover { color: var(--c-accent); }

.company-row:nth-child(odd) > dt { grid-column: 1; }
.company-row:nth-child(odd) > dd { grid-column: 2; }

.company-grid { grid-template-columns: 200px 1fr; }

/* =========================================================
   CTA LINKS
========================================================= */
.cta-section {
  padding: clamp(60px, 8vw, 100px) 0;
  background: var(--c-navy);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-mesh);
  opacity: .5;
}

.cta-section .section-title { color: #fff; }
.cta-section .section-label { color: var(--c-accent); }
.cta-section .section-label::before { background: var(--c-accent); }

.cta-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.cta-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: clamp(24px, 3vw, 36px);
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
  transition: transform var(--transition), background var(--transition);
  color: #fff;
}

.cta-card:hover {
  transform: translateY(-4px);
  background: rgba(255,255,255,.12);
  color: #fff;
}

.cta-card-icon {
  width: 48px;
  height: 48px;
  background: var(--gradient-accent);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  font-size: 18px;
  color: #fff;
}

.cta-card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

body.lang-en .cta-card-title { font-family: var(--font-en); }

.cta-card-desc {
  font-size: 13px;
  color: rgba(255,255,255,.7);
  line-height: 1.7;
}

.cta-card-arrow {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,.1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), transform var(--transition);
}

.cta-card:hover .cta-card-arrow {
  background: var(--c-accent);
  transform: translateX(4px);
}

/* =========================================================
   FOOTER
========================================================= */
#site-footer {
  background: var(--c-navy);
  color: rgba(255,255,255,.75);
  padding: clamp(48px, 6vw, 72px) 0 28px;
}

.footer-inner { text-align: center; }

.footer-logo img {
  height: 32px;
  margin: 0 auto 16px;
  filter: brightness(0) invert(1);
  opacity: .9;
}

.footer-tagline {
  font-family: var(--font-en);
  font-size: 12px;
  letter-spacing: .12em;
  color: rgba(255,255,255,.45);
  margin-bottom: 28px;
}

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px 32px;
  margin-bottom: 28px;
  font-size: 13px;
}

.footer-contact a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,.7);
  transition: color var(--transition);
}

.footer-contact a:hover { color: var(--c-accent); }

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 24px;
  margin-bottom: 28px;
}

.footer-nav a {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .06em;
  color: rgba(255,255,255,.55);
  transition: color var(--transition);
}

.footer-nav a:hover { color: #fff; }

.footer-divider {
  width: 100%;
  height: 1px;
  background: rgba(255,255,255,.08);
  margin-bottom: 24px;
}

.footer-license {
  font-size: 12px;
  line-height: 1.8;
  color: rgba(255,255,255,.4);
  margin-bottom: 16px;
}

.footer-copy {
  font-family: var(--font-en);
  font-size: 11px;
  color: rgba(255,255,255,.25);
  letter-spacing: .05em;
}

/* =========================================================
   RESPONSIVE
========================================================= */
@media (max-width: 1024px) {
  #business, #tools, #company { padding: var(--gap-tb) 0; }
  .business-grid, .tool-grid, .cta-grid { grid-template-columns: 1fr; }
  .company-grid { grid-template-columns: 1fr; }
  .company-row { display: block; border-bottom: 1px solid var(--c-border); }
  .company-row > dt,
  .company-row > dd {
    display: block;
    border-bottom: none;
    padding: 12px 20px;
  }
  .company-row > dt { padding-bottom: 4px; background: var(--c-bg); }
  .company-row > dd { padding-top: 4px; padding-bottom: 16px; }
}

@media (max-width: 768px) {
  :root { --header-h: 64px; }
  .site-nav { display: none; }
  .header-phone { display: none; }
  .hamburger { display: flex; }
  .mobile-nav { display: block; }
  .site-logo img { height: 30px; }

  #business, #tools, #company { padding: var(--gap-sp) 0; }

  .hero-stats { grid-template-columns: 1fr; }
  .hero-stat { padding: 14px; }

  .tool-card { flex-direction: column; gap: 16px; }
  .business-btns { flex-direction: column; }
  .business-btns .btn { justify-content: center; }
  .cta-card { flex-direction: column; align-items: flex-start; }
  .cta-card-arrow { align-self: flex-end; }
}