/* ============================================================
   World-OKTA 札幌支会  /  Skeleton stylesheet
   - Mobile first (375px) → Tablet (768px) → Desktop (1200px)
   ============================================================ */

/* ---------- 1. Reset & Tokens ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Noto Sans JP", "Noto Sans KR", system-ui, -apple-system, sans-serif;
  font-weight: 400;
  line-height: 1.75;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a   { color: inherit; text-decoration: none; }
ul, ol, dl { margin: 0; padding: 0; list-style: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }

:root {
  /* color */
  --c-primary:   #0A2A5E;
  --c-primary-2: #163C7E;
  --c-accent:    #C8102E;
  --c-text:      #1A1A1A;
  --c-text-sub:  #555F6D;
  --c-bg:        #FFFFFF;
  --c-bg-soft:   #F5F6F8;
  --c-border:    #E1E4EA;

  /* spacing */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 16px;
  --sp-4: 24px;
  --sp-5: 32px;
  --sp-6: 48px;
  --sp-7: 72px;
  --sp-8: 96px;

  /* layout */
  --container: 1200px;
  --radius: 10px;
  --radius-lg: 16px;

  /* shadow */
  --shadow-sm: 0 2px 8px rgba(10, 42, 94, 0.06);
  --shadow-md: 0 8px 24px rgba(10, 42, 94, 0.08);
}

/* ---------- 2. Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-3);
}

.section {
  padding-block: var(--sp-6);
}

.section-head { margin-bottom: var(--sp-5); }
.section-eyebrow {
  display: inline-block;
  margin: 0 0 var(--sp-2);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--c-accent);
  text-transform: uppercase;
}
.section-title {
  margin: 0 0 var(--sp-3);
  font-size: 1.625rem;
  font-weight: 900;
  line-height: 1.35;
  color: var(--c-primary);
}
.section-lead {
  margin: 0;
  color: var(--c-text-sub);
  font-size: 0.95rem;
}

/* ---------- 3. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease, color .15s ease;
}
.btn-primary {
  background: var(--c-accent);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline {
  background: transparent;
  color: var(--c-primary);
  border: 2px solid var(--c-primary);
}
.btn-outline:hover { background: var(--c-primary); color: #fff; }
.btn-block { width: 100%; }

/* ---------- 4. Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: #ffffff;
  border-bottom: 1px solid var(--c-border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.logo-emblem {
  width: 40px;
  height: 40px;
  flex: 0 0 40px;
  display: block;
  object-fit: contain;
}
.logo-mark {
  font-weight: 900;
  font-size: 1.25rem;
  color: var(--c-primary);
  letter-spacing: 0.08em;
}
.logo-sub {
  font-size: 0.8rem;
  color: var(--c-text-sub);
  font-weight: 500;
}

/* Hamburger */
.nav-toggle {
  width: 40px;
  height: 40px;
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 0 8px;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--c-primary);
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav drawer */
.global-nav {
  position: fixed;
  inset: 64px 0 0 0;
  z-index: 60;
  background: #fff;
  padding: var(--sp-5) var(--sp-4);
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform .25s ease;
  border-top: 1px solid var(--c-border);
}
.global-nav.open { transform: translateX(0); }
.global-nav ul { display: flex; flex-direction: column; gap: var(--sp-2); }
.global-nav a {
  display: block;
  padding: 14px 4px;
  font-weight: 700;
  color: var(--c-primary);
  border-bottom: 1px solid var(--c-border);
}
.lang-switch {
  display: flex;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}
.lang {
  padding: 6px 14px;
  border: 1px solid var(--c-border);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--c-text-sub);
}
.lang.active { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }

/* ---------- 5. Hero ---------- */
.hero {
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-2) 100%);
  color: #fff;
  padding-block: var(--sp-7);
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -80px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: var(--c-accent);
  opacity: .15;
}
.hero-eyebrow {
  margin: 0 0 var(--sp-4);
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  color: #6EE7F2;
  line-height: 1.3;
}
.hero-title {
  margin: 0 0 var(--sp-4);
  font-size: 2rem;
  line-height: 1.35;
  font-weight: 900;
}
.hero-title .accent { color: #FFD45A; }
.hero-lead {
  margin: 0 0 var(--sp-5);
  font-size: 1.1rem;
  color: rgba(255,255,255,.9);
  max-width: 580px;
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}
.hero .btn-outline {
  color: #fff;
  border-color: rgba(255,255,255,.6);
}
.hero .btn-outline:hover { background: #fff; color: var(--c-primary); }

/* ---------- 6. About / Stats ---------- */
.section-about { background: var(--c-bg-soft); }
.about-head { text-align: center; }
.about-wordmark {
  display: block;
  margin: 0 auto var(--sp-4);
  max-width: 280px;
  width: 100%;
  height: auto;
}
.about-head .section-eyebrow { display: inline-block; }
.stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-3);
}
.stats li {
  background: #fff;
  border-radius: var(--radius);
  padding: var(--sp-4) var(--sp-3);
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.stats-num {
  display: block;
  font-size: 2rem;
  font-weight: 900;
  color: var(--c-primary);
  line-height: 1.1;
}
.stats-num small { font-size: 0.6em; color: var(--c-accent); }
.stats-label {
  display: block;
  margin-top: var(--sp-2);
  font-size: 0.8rem;
  color: var(--c-text-sub);
}

/* ---------- 7. Chapter / Org chart ---------- */
.chapter-head { max-width: 760px; margin-bottom: var(--sp-6); }
.chapter-head p { margin: 0 0 var(--sp-3); color: var(--c-text-sub); }

.org-title {
  margin: 0 0 var(--sp-4);
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--c-primary);
  text-align: center;
}

.org-chart {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.org-node {
  width: 100%;
  max-width: 340px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: var(--sp-3);
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.org-node .org-role {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--c-text-sub);
}
.org-node .org-name {
  display: block;
  margin-top: var(--sp-1);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-primary);
}
.org-node .org-name small {
  font-family: "Noto Sans KR", sans-serif;
  font-weight: 500;
  font-size: 0.78rem;
  color: var(--c-text-sub);
  margin-left: var(--sp-2);
}

/* top nodes (会長 / 主席副会長) */
.org-top { background: var(--c-primary); border-color: var(--c-primary); }
.org-top .org-role { color: rgba(255,255,255,.7); }
.org-top .org-name { color: #fff; }
.org-top .org-name small { color: rgba(255,255,255,.7); }

.org-connector {
  width: 2px;
  height: 24px;
  background: var(--c-border);
}

/* branch groups */
.org-branches {
  display: grid;
  gap: var(--sp-4);
  width: 100%;
  position: relative;
}
/* --- mobile: left spine showing 3 groups are parallel siblings --- */
.org-branches { padding-left: 24px; }
.org-branches::before {
  content: "";
  position: absolute;
  left: 9px;
  top: -24px;
  bottom: 0;
  width: 2px;
  background: var(--c-border);
}
.org-group {
  border-radius: var(--radius-lg);
  padding: var(--sp-4);
  border: 1px solid;
  position: relative;
}
.org-group::before {
  content: "";
  position: absolute;
  left: -15px;
  top: 40px;
  width: 15px;
  height: 2px;
  background: var(--c-border);
}
.org-group .org-lead {
  max-width: none;
  background: #fff;
}
.org-members {
  display: grid;
  gap: var(--sp-2);
  margin-top: var(--sp-3);
}
.org-members li {
  background: rgba(255,255,255,.72);
  border-radius: var(--radius);
  padding: var(--sp-2) var(--sp-3);
  text-align: center;
}
.org-members .org-role {
  display: block;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--c-text-sub);
}
.org-members .org-name {
  display: block;
  margin-top: 2px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--c-primary);
}
.org-members .org-name small {
  font-family: "Noto Sans KR", sans-serif;
  font-weight: 500;
  font-size: 0.72rem;
  color: var(--c-text-sub);
  margin-left: var(--sp-1);
}

.group-a { background: #E8F4F2; border-color: #9CC9C3; }
.group-b { background: #ECF3E4; border-color: #A9C887; }
.group-c { background: #FCEFE0; border-color: #E6BD8A; }
.group-a .org-lead { border-color: #9CC9C3; }
.group-b .org-lead { border-color: #A9C887; }
.group-c .org-lead { border-color: #E6BD8A; }

/* ---------- 8. Services / Cases (Card grid) ---------- */
.cards {
  display: grid;
  gap: var(--sp-3);
}
.card,
.case-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: var(--sp-4);
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.card:hover,
.case-card:hover {
  transform: translateY(-3px);
  border-color: var(--c-primary);
  box-shadow: var(--shadow-md);
}
.card-num {
  margin: 0 0 var(--sp-2);
  font-size: 0.85rem;
  font-weight: 900;
  color: var(--c-accent);
  letter-spacing: 0.1em;
}
.card h3,
.case-card h3 {
  margin: 0 0 var(--sp-2);
  font-size: 1.1rem;
  color: var(--c-primary);
  font-weight: 700;
}
.card p,
.case-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--c-text-sub);
}
.section-cases { background: var(--c-bg-soft); }
.case-tag {
  display: inline-block;
  padding: 4px 12px;
  margin: 0 0 var(--sp-2);
  background: var(--c-primary);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  border-radius: 999px;
}

/* ---------- 8.5 Member business ---------- */
.members-cards {
  display: grid;
  gap: var(--sp-3);
}
.member-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: var(--sp-4);
  display: flex;
  flex-direction: column;
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.member-card:hover {
  transform: translateY(-3px);
  border-color: var(--c-primary);
  box-shadow: var(--shadow-md);
}
.member-cat {
  align-self: flex-start;
  display: inline-block;
  padding: 4px 12px;
  margin: 0 0 var(--sp-3);
  background: var(--c-accent);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  border-radius: 999px;
}
.member-card h3 {
  margin: 0 0 2px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-primary);
  line-height: 1.5;
}
.member-rep {
  margin: 0 0 var(--sp-3);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--c-text-sub);
}
.member-sum {
  margin: 0 0 var(--sp-3);
  font-size: 0.88rem;
  color: var(--c-text-sub);
}
.member-svc {
  margin: 0 0 var(--sp-3);
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}
.member-svc li {
  position: relative;
  padding-left: 16px;
  font-size: 0.84rem;
  color: var(--c-text);
}
.member-svc li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-accent);
}
.member-contact {
  margin: auto 0 0;
  padding-top: var(--sp-3);
  border-top: 1px solid var(--c-border);
  font-size: 0.78rem;
  color: var(--c-text-sub);
  word-break: break-word;
}
.member-contact a { color: var(--c-accent); font-weight: 700; }

/* ---------- 9. Media & Activity ---------- */
.media-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-bottom: var(--sp-4);
  border-bottom: 1px solid var(--c-border);
  padding-bottom: var(--sp-2);
}
.media-tab {
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--c-text-sub);
  background: var(--c-bg-soft);
  white-space: nowrap;
}
.media-tab.active {
  background: var(--c-primary);
  color: #fff;
}

.media-panel { display: none; }
.media-panel.active { display: block; }

.media-list {
  display: grid;
  gap: var(--sp-4);
}
.media-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-3);
  padding: var(--sp-3);
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  transition: box-shadow .15s ease, border-color .15s ease;
}
.media-item:hover { border-color: var(--c-primary); box-shadow: var(--shadow-md); }

.media-thumb {
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #cfd5e1, #e8ebf1);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #6f7a8a;
  font-size: 0.8rem;
  font-weight: 700;
}
.media-thumb.upcoming { background: linear-gradient(135deg, #ffe7b3, #fff3d6); color: #8a6a1f; }
.media-thumb.activity { background: linear-gradient(135deg, #d8e8d3, #eef5ec); color: #4a6a44; }

.media-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin: 0 0 var(--sp-2);
  font-size: 0.75rem;
  color: var(--c-text-sub);
}
.media-date { font-weight: 700; color: var(--c-primary); }
.media-source::before { content: "│"; margin-right: var(--sp-2); color: var(--c-border); }

.media-title {
  margin: 0 0 var(--sp-2);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-primary);
  line-height: 1.5;
}
.media-excerpt {
  margin: 0 0 var(--sp-2);
  font-size: 0.9rem;
  color: var(--c-text-sub);
}
.media-link {
  display: inline-block;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--c-accent);
}
.media-status {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 700;
}
.status-done      { background: #E3F4E8; color: #1F7A3A; }
.status-scheduled { background: #FFF3D6; color: #8a6a1f; }

.media-more {
  text-align: center;
  margin-top: var(--sp-5);
}

/* ---------- 10. Contact ---------- */
.section-contact { background: var(--c-bg-soft); }
.contact-grid {
  display: grid;
  gap: var(--sp-5);
}
.contact-info {
  margin-top: var(--sp-4);
  display: grid;
  grid-template-columns: 100px 1fr;
  row-gap: var(--sp-2);
  column-gap: var(--sp-3);
  font-size: 0.9rem;
}
.contact-info dt { font-weight: 700; color: var(--c-primary); }
.contact-info dd { margin: 0; color: var(--c-text-sub); }
.contact-info a  { color: var(--c-accent); font-weight: 700; }

.contact-form {
  background: #fff;
  padding: var(--sp-5) var(--sp-4);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  display: grid;
  gap: var(--sp-3);
}
.contact-form label {
  display: grid;
  gap: var(--sp-1);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--c-primary);
}
.contact-form em { color: var(--c-accent); font-style: normal; }
.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  font: inherit;
  background: #fff;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(10,42,94,.12);
}

/* ---------- 11. Footer ---------- */
.site-footer {
  background: var(--c-primary);
  color: rgba(255,255,255,.8);
}
.footer-grid {
  display: grid;
  gap: var(--sp-5);
  padding-block: var(--sp-6);
}
.footer-logo-img {
  display: block;
  max-width: 320px;
  width: 100%;
  height: auto;
  margin: 0 0 var(--sp-3);
  background: #fff;
  padding: 10px 14px;
  border-radius: 8px;
  box-sizing: border-box;
}
.footer-logo {
  margin: 0 0 var(--sp-2);
  font-weight: 900;
  font-size: 1.1rem;
  color: #fff;
}
.footer-tag, .footer-meta {
  margin: 0 0 var(--sp-1);
  font-size: 0.8rem;
}
.footer-head {
  margin: 0 0 var(--sp-3);
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.08em;
}
.footer-nav a, .footer-links a {
  display: inline-block;
  padding: 6px 0;
  font-size: 0.9rem;
  color: rgba(255,255,255,.75);
}
.footer-nav a:hover, .footer-links a:hover { color: #fff; }
.footer-bottom {
  background: rgba(0,0,0,.2);
  padding-block: var(--sp-3);
  text-align: center;
  font-size: 0.75rem;
  color: rgba(255,255,255,.6);
}

/* ============================================================
   Tablet  (768px–)
   ============================================================ */
@media (min-width: 768px) {
  .container { padding-inline: var(--sp-4); }
  .section { padding-block: var(--sp-7); }

  .section-title { font-size: 2rem; }
  .hero-title    { font-size: 2.75rem; }
  .hero-eyebrow  { font-size: 1.9rem; }
  .hero-lead     { font-size: 1.2rem; }

  /* Header */
  .nav-toggle { display: none; }
  .global-nav {
    position: static;
    inset: auto;
    background: transparent;
    padding: 0;
    transform: none;
    border-top: 0;
    display: flex;
    align-items: center;
    gap: var(--sp-4);
  }
  .global-nav ul {
    flex-direction: row;
    gap: var(--sp-4);
  }
  .global-nav a {
    padding: 8px 0;
    border-bottom: 0;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--c-text);
  }
  .global-nav a:hover { color: var(--c-accent); }
  .lang-switch { margin-top: 0; }

  /* Stats */
  .stats { grid-template-columns: repeat(5, 1fr); }
  .stats-num { font-size: 2.5rem; }

  /* Chapter / Org chart */
  .org-branches {
    grid-template-columns: repeat(3, 1fr);
    align-items: start;
    gap: var(--sp-5);
    padding-left: 0;
  }
  /* hide mobile left spine */
  .org-branches::before { display: none; }
  /* extra breathing room between 主席副会長 and group cards */
  .org-branches { margin-top: var(--sp-2); }
  /* vertical stub: group up to horizontal trunk (half-gap so trunk sits midway) */
  .org-group::before {
    left: 50%;
    top: -16px;
    width: 2px;
    height: 16px;
  }
  /* horizontal trunk (extend across grid gap to connect) */
  .org-group::after {
    content: "";
    position: absolute;
    top: -16px;
    left: calc(var(--sp-5) / -2);
    right: calc(var(--sp-5) / -2);
    height: 2px;
    background: var(--c-border);
  }
  .org-branches > .org-group:first-child::after { left: 50%; }
  .org-branches > .org-group:last-child::after  { right: 50%; }

  /* Cards */
  .services-cards { grid-template-columns: repeat(2, 1fr); }
  .cases-cards    { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
  .members-cards  { grid-template-columns: repeat(2, 1fr); }

  /* Media */
  .media-item {
    grid-template-columns: 220px 1fr;
    align-items: start;
  }

  /* Contact */
  .contact-grid { grid-template-columns: 1fr 1.1fr; align-items: start; }

  /* Footer */
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
}

/* ============================================================
   Desktop (1200px–)
   ============================================================ */
@media (min-width: 1200px) {
  .section { padding-block: var(--sp-8); }
  .hero    { padding-block: var(--sp-8); }
  .hero-title { font-size: 3.25rem; }
  .hero-eyebrow { font-size: 2.2rem; }

  .services-cards { grid-template-columns: repeat(4, 1fr); }
  .members-cards  { grid-template-columns: repeat(3, 1fr); }

  .media-list { grid-template-columns: 1fr; }
  .media-item { grid-template-columns: 280px 1fr; gap: var(--sp-4); }
}

/* ============================================================
   Reduced motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    scroll-behavior: auto !important;
  }
}