/* ===================================================================
   協同組合オフィスサポート - Design System
   =================================================================== */

:root {
  /* Colors - Navy + Gold accent (Variation A default) */
  --color-bg: #ffffff;
  --color-bg-alt: #f7f8fa;
  --color-bg-dark: #0a2b5c;
  --color-bg-darker: #061a3a;
  --color-primary: #0a2b5c;
  --color-primary-hover: #133a73;
  --color-accent: #b88b4a;
  --color-accent-hover: #a07838;
  --color-text: #1a1f2e;
  --color-text-muted: #5a6478;
  --color-text-light: #8892a6;
  --color-border: #e5e7eb;
  --color-border-strong: #cdd3dd;
  --color-white: #ffffff;

  /* Type */
  --font-serif: 'Noto Serif JP', 'Shippori Mincho', 'Yu Mincho', serif;
  --font-sans: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;
  --font-en-serif: 'Cormorant Garamond', 'Noto Serif JP', serif;
  --font-en-sans: 'Inter', 'Noto Sans JP', sans-serif;

  /* Spacing */
  --container: 1200px;
  --container-narrow: 960px;

  /* Transitions */
  --t: 240ms cubic-bezier(.4,0,.2,1);
  --t-slow: 520ms cubic-bezier(.4,0,.2,1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--t), opacity var(--t);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ---- Layout ---- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}
.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 32px;
}

/* ---- Typography ---- */
.serif { font-family: var(--font-serif); font-weight: 500; }
.en-serif { font-family: var(--font-en-serif); font-style: italic; font-weight: 400; letter-spacing: .02em; }
.en-sans { font-family: var(--font-en-sans); letter-spacing: .1em; }

.eyebrow {
  font-family: var(--font-en-sans);
  font-size: 11px;
  letter-spacing: .24em;
  font-weight: 500;
  color: var(--color-accent);
  text-transform: uppercase;
  display: inline-block;
}
.eyebrow::before {
  content: '';
  display: inline-block;
  width: 28px;
  height: 1px;
  background: var(--color-accent);
  vertical-align: middle;
  margin-right: 12px;
  margin-bottom: 3px;
}

h1, h2, h3, h4 {
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: .02em;
  color: var(--color-text);
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(24px, 2.6vw, 34px);
  font-weight: 500;
  letter-spacing: .04em;
  line-height: 1.4;
}

.section-title-en {
  font-family: var(--font-en-serif);
  font-style: italic;
  font-size: clamp(48px, 6vw, 84px);
  color: var(--color-primary);
  opacity: .08;
  position: absolute;
  top: -.4em;
  left: -20px;
  letter-spacing: -.01em;
  pointer-events: none;
  z-index: 0;
}

/* ---- Header ---- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(229,231,235,.6);
  transition: background var(--t);
}
.site-header.scrolled {
  background: rgba(255,255,255,.98);
  box-shadow: 0 1px 0 rgba(10,43,92,.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 40px;
  max-width: 1400px;
  margin: 0 auto;
}
.header-inner.centered {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 40px;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 14px;
}
.logo-svg {
  flex-shrink: 0;
  display: block;
}
.logo-mark {
  /* legacy fallback, retained for safety */
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  color: var(--color-white);
  display: grid;
  place-items: center;
  font-family: var(--font-en-serif);
  font-style: italic;
  font-size: 22px;
  border-radius: 2px;
  letter-spacing: -.02em;
  position: relative;
}
.logo-text {
  line-height: 1.2;
}
.logo-text .jp {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: .1em;
  color: var(--color-text);
}
.logo-text .sub {
  font-size: 9.5px;
  letter-spacing: .22em;
  color: var(--color-text-muted);
  margin-top: 2px;
  display: block;
}

.nav {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: .06em;
  position: relative;
  padding: 4px 0;
}
.nav a::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 1px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t);
}
.nav a:hover::after,
.nav a.active::after {
  transform: scaleX(1);
}
.nav a .en {
  display: block;
  font-family: var(--font-en-sans);
  font-size: 9px;
  letter-spacing: .18em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-top: 2px;
  font-weight: 500;
  text-align: center;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 12px 22px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .08em;
  border-radius: 2px;
  transition: background var(--t);
}
.header-cta:hover {
  background: var(--color-primary-hover);
}
.header-cta::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 32px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .1em;
  border-radius: 2px;
  transition: all var(--t);
  position: relative;
  overflow: hidden;
  font-family: var(--font-sans);
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 10px 20px -10px rgba(10,43,92,.4);
}
.btn-ghost {
  background: transparent;
  color: var(--color-white);
  border: 1px solid rgba(255,255,255,.4);
}
.btn-ghost:hover {
  background: rgba(255,255,255,.08);
  border-color: var(--color-white);
}
.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}
.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}
.btn-accent {
  background: var(--color-accent);
  color: var(--color-white);
}
.btn-accent:hover {
  background: var(--color-accent-hover);
}
.btn .arrow {
  width: 18px;
  height: 1px;
  background: currentColor;
  position: relative;
  transition: width var(--t);
}
.btn .arrow::after {
  content: '';
  position: absolute;
  right: 0;
  top: -3px;
  width: 7px;
  height: 7px;
  border-right: 1px solid currentColor;
  border-top: 1px solid currentColor;
  transform: rotate(45deg);
}
.btn:hover .arrow { width: 26px; }

/* ---- Breadcrumbs ---- */
.breadcrumb {
  font-size: 12px;
  letter-spacing: .1em;
  color: rgba(255,255,255,.7);
  margin-bottom: 16px;
}
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb .sep { margin: 0 10px; opacity: .5; }

/* ---- Page Hero (subpages) ---- */
.page-hero {
  position: relative;
  padding: 160px 0 80px;
  background: var(--color-primary);
  color: var(--color-white);
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('https://images.unsplash.com/photo-1542931287-023b922fa89b?w=1920&q=80') center/cover;
  opacity: .22;
  animation: heroKen 24s ease-in-out infinite alternate;
}
.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(6,26,58,.94) 0%, rgba(10,43,92,.85) 100%);
}
.page-hero-inner { position: relative; z-index: 2; }
@keyframes heroKen {
  0% { transform: scale(1.04); }
  100% { transform: scale(1.12); }
}
.page-hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}
.page-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(26px, 3vw, 40px);
  font-weight: 500;
  letter-spacing: .12em;
  margin-top: 8px;
}
.page-hero .en-label {
  font-family: var(--font-en-serif);
  font-style: italic;
  font-size: 18px;
  color: var(--color-accent);
  margin-top: 16px;
  display: block;
  letter-spacing: .02em;
}
.page-hero p {
  font-size: 14px;
  color: rgba(255,255,255,.75);
  margin-top: 24px;
  letter-spacing: .08em;
}

/* ---- Section ---- */
.section {
  padding: 120px 0;
  position: relative;
}
.section-sm { padding: 80px 0; }
.section-alt { background: var(--color-bg-alt); }
.section-dark { background: var(--color-bg-dark); color: var(--color-white); }

.section-head {
  text-align: center;
  margin-bottom: 80px;
  position: relative;
}
.section-head-left {
  text-align: left;
  margin-bottom: 64px;
}

/* ---- Cards ---- */
.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  padding: 40px 36px;
  transition: all var(--t);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-slow);
}
.card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -20px rgba(10,43,92,.15);
}
.card:hover::before { transform: scaleX(1); }

/* ---- Tweaks panel ---- */
.tweaks-panel {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  box-shadow: 0 20px 60px -20px rgba(10,43,92,.3);
  width: 280px;
  font-size: 13px;
  display: none;
  overflow: hidden;
}
.tweaks-panel.open { display: block; }
.tweaks-header {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 14px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.tweaks-header h4 {
  font-family: var(--font-en-sans);
  font-size: 12px;
  letter-spacing: .2em;
  font-weight: 500;
  text-transform: uppercase;
}
.tweaks-body { padding: 18px; }
.tweaks-group { margin-bottom: 18px; }
.tweaks-group:last-child { margin-bottom: 0; }
.tweaks-label {
  display: block;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--color-text-muted);
  margin-bottom: 8px;
  font-weight: 500;
  text-transform: uppercase;
}
.tweaks-options {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 6px;
}
.tweaks-opt {
  padding: 10px 6px;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  font-size: 11px;
  color: var(--color-text);
  border-radius: 2px;
  text-align: center;
  transition: all var(--t);
  line-height: 1.3;
}
.tweaks-opt:hover { border-color: var(--color-primary); }
.tweaks-opt.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* ---- Placeholder images ---- */
.ph {
  background:
    repeating-linear-gradient(
      135deg,
      rgba(10,43,92,.08) 0,
      rgba(10,43,92,.08) 1px,
      rgba(10,43,92,.03) 1px,
      rgba(10,43,92,.03) 10px
    ),
    linear-gradient(135deg, #dde3ec, #c4cdd9);
  position: relative;
  display: grid;
  place-items: center;
  color: rgba(10,43,92,.55);
  font-family: 'SF Mono', 'Menlo', monospace;
  font-size: 11px;
  letter-spacing: .15em;
  text-transform: uppercase;
  overflow: hidden;
}
.ph-dark {
  background:
    repeating-linear-gradient(
      135deg,
      rgba(255,255,255,.04) 0,
      rgba(255,255,255,.04) 1px,
      transparent 1px,
      transparent 10px
    ),
    linear-gradient(135deg, #133a73, #0a2b5c);
  color: rgba(255,255,255,.45);
}
.ph span {
  z-index: 1;
  padding: 6px 12px;
  background: rgba(255,255,255,.6);
  backdrop-filter: blur(4px);
}
.ph-dark span {
  background: rgba(10,43,92,.6);
}

/* ---- Footer ---- */
.site-footer {
  background: var(--color-bg-darker);
  color: rgba(255,255,255,.7);
  padding: 80px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 60px;
}
.footer-brand .logo-text .jp { color: var(--color-white); }
.footer-brand .logo-text .sub { color: rgba(255,255,255,.5); }
.footer-desc {
  margin-top: 20px;
  font-size: 12px;
  line-height: 1.9;
  max-width: 320px;
  color: rgba(255,255,255,.55);
}
.footer-col h5 {
  font-family: var(--font-en-sans);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 20px;
  font-weight: 500;
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 12px; }
.footer-col a {
  font-size: 13px;
  color: rgba(255,255,255,.7);
  transition: color var(--t);
}
.footer-col a:hover { color: var(--color-accent); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  letter-spacing: .1em;
  color: rgba(255,255,255,.4);
}

/* ---- Utilities ---- */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 900ms cubic-bezier(.2,.6,.3,1), transform 900ms cubic-bezier(.2,.6,.3,1);
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}
.reveal-slow { transition-duration: 1200ms; }
.reveal-img {
  opacity: 0;
  clip-path: inset(0 100% 0 0);
  transition: opacity 1200ms ease, clip-path 1400ms cubic-bezier(.7,0,.3,1);
}
.reveal-img.in {
  opacity: 1;
  clip-path: inset(0 0 0 0);
}
/* Fallback: when JS can't reach, still show */
.no-js .reveal, .no-js .reveal-img { opacity: 1; clip-path: none; transform: none; }

@keyframes shimmerIn {
  from { background-position: -200% 0; }
  to { background-position: 0 0; }
}
@keyframes floaty {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Hero text animation on load */
.hero-eyebrow, .hero h1, .hero-sub, .hero-cta {
  animation: fadeInUp 1200ms cubic-bezier(.2,.6,.3,1) backwards;
}
.hero h1 { animation-delay: .15s; }
.hero-sub { animation-delay: .35s; }
.hero-cta { animation-delay: .5s; }

.divider {
  width: 40px;
  height: 1px;
  background: var(--color-accent);
  margin: 20px auto;
}

/* ---- Responsive ---- */
@media (max-width: 880px) {
  .header-inner { padding: 14px 20px; }
  .nav { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .section { padding: 72px 0; }
  .section-head { margin-bottom: 48px; }
}