/* ===================================
   ICHIGU Terrace — Main Stylesheet
   モンドリアン風 × モダンデザイン
   =================================== */

:root {
  --red:    #D32F2F;
  --blue:   #1565C0;
  --yellow: #FDD835;
  --black:  #111111;
  --white:  #FAFAFA;
  --gray:   #F5F5F5;
  --border: 3px solid #111;
  --border-thick: 5px solid #111;
  --shadow: 6px 6px 0px #111;
  --shadow-hover: 10px 10px 0px #111;
  --radius: 0px;
  --font-en: 'Bebas Neue', 'Inter', sans-serif;
  --font-jp: 'Noto Sans JP', sans-serif;
  --transition: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-jp);
  background: var(--white);
  color: var(--black);
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== LOADER ===== */
#loader {
  position: fixed;
  inset: 0;
  background: var(--white);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}
#loader.fade-out { opacity: 0; visibility: hidden; }

.loader-mondrian {
  width: 80px; height: 80px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  border: var(--border);
}
.l-block { animation: lbFill 1.2s ease infinite alternate; }
.l-block.b1 { background: var(--red); animation-delay: 0s; }
.l-block.b2 { background: var(--blue); animation-delay: 0.2s; }
.l-block.b3 { background: var(--yellow); animation-delay: 0.4s; }
.l-block.b4 { background: var(--black); animation-delay: 0.6s; }
@keyframes lbFill { 0%{opacity:0.3;transform:scale(0.8)}100%{opacity:1;transform:scale(1)} }

.loader-text {
  font-family: var(--font-en);
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: 4px;
  display: flex;
}
.loader-text span { display: inline-block; animation: letterBounce 1.2s ease infinite; }
.loader-text span:nth-child(1){animation-delay:0.0s;color:var(--red)}
.loader-text span:nth-child(2){animation-delay:0.1s}
.loader-text span:nth-child(3){animation-delay:0.2s;color:var(--blue)}
.loader-text span:nth-child(4){animation-delay:0.3s}
.loader-text span:nth-child(5){animation-delay:0.4s}
.loader-text span:nth-child(6){animation-delay:0.5s}
.loader-text span:nth-child(8){animation-delay:0.6s;color:var(--yellow);-webkit-text-stroke:1px #111}
.loader-text span:nth-child(9){animation-delay:0.7s}
.loader-text span:nth-child(10){animation-delay:0.8s}
.loader-text span:nth-child(11){animation-delay:0.9s}
.loader-text span:nth-child(12){animation-delay:1.0s;color:var(--red)}
.loader-text span:nth-child(13){animation-delay:1.1s}
.loader-text span:nth-child(14){animation-delay:1.2s}
@keyframes letterBounce {
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-8px)}
}

/* ===== NAVBAR ===== */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: var(--white);
  border-bottom: var(--border-thick);
  padding: 0 32px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: box-shadow var(--transition);
}
#navbar.scrolled { box-shadow: 0 4px 0 var(--black); }

.nav-logo {
  font-family: var(--font-en);
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: 1px;
}
.logo-i { color: var(--red); font-size: 1.6rem; }
.logo-chigu { color: var(--black); }
.logo-terrace { color: var(--blue); }

.nav-links { display: flex; gap: 8px; align-items: center; }
.nav-links a {
  padding: 6px 14px;
  font-weight: 600;
  font-size: 0.85rem;
  border: 2px solid transparent;
  transition: var(--transition);
}
/* 汎用リンクホバー（nav-cta・nav-login には適用しない） */
.nav-links a:not(.nav-cta):not(.nav-login):hover {
  border-color: var(--black);
  background: var(--yellow);
}
.nav-links a.nav-cta {
  background: var(--red);
  color: var(--white);
  border: 2px solid var(--black);
  box-shadow: 3px 3px 0 var(--black);
}
.nav-links a.nav-cta:hover {
  background: var(--black);
  color: var(--white);
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--red);
}

/* ログインボタン */
.nav-links a.nav-login {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--blue);
  color: var(--white);
  border: 2px solid var(--black);
  box-shadow: 3px 3px 0 var(--black);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 6px 16px;
  transition: var(--transition);
  white-space: nowrap;
}
.nav-links a.nav-login:hover {
  background: var(--black);
  color: var(--white);
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--blue);
  border-color: var(--black);
}
.nav-links a.nav-login i {
  font-size: 0.8rem;
}

/* モバイルメニュー内ログインボタン */
.mobile-menu li a.mobile-login {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
  background: var(--blue);
  font-weight: 700;
  border-bottom: 2px solid rgba(255,255,255,0.2);
  box-shadow: inset 0 -3px 0 var(--black);
}
.mobile-menu li a.mobile-login:hover {
  background: #0D47A1;
  padding-left: 48px;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 26px;
  height: 3px;
  background: var(--black);
  transition: var(--transition);
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 6px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -6px); }

.mobile-menu {
  position: fixed;
  top: 64px; left: 0; right: 0;
  background: var(--white);
  border-bottom: var(--border-thick);
  z-index: 999;
  transform: translateY(-110%);
  transition: transform 0.4s cubic-bezier(0.4,0,0.2,1);
}
.mobile-menu.open { transform: translateY(0); }
.mobile-menu ul { padding: 16px 0; }
.mobile-menu li a {
  display: block;
  padding: 14px 32px;
  font-size: 1.1rem;
  font-weight: 700;
  border-bottom: 2px solid #eee;
  transition: var(--transition);
}
.mobile-menu li a:hover { background: var(--yellow); padding-left: 48px; }

/* ===== HERO ===== */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding-top: 64px;
  overflow: hidden;
}

.hero-mondrian-bg {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  gap: 6px;
  padding: 6px;
  opacity: 0.12;
  pointer-events: none;
}
.m-cell { transition: opacity 2s ease; }
.m-cell.red    { background: var(--red); }
.m-cell.blue   { background: var(--blue); }
.m-cell.yellow { background: var(--yellow); }
.m-cell.white  { background: #ddd; }

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  padding: 40px 24px;
}

.hero-badge {
  display: inline-block;
  background: var(--yellow);
  color: var(--black);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 6px 20px;
  border: var(--border);
  box-shadow: var(--shadow);
  margin-bottom: 24px;
  letter-spacing: 2px;
}

.hero-title {
  font-family: var(--font-en);
  font-size: clamp(3.5rem, 10vw, 8rem);
  font-weight: 900;
  line-height: 0.9;
  margin-bottom: 20px;
}
.title-ichigu { display: block; }
.letter-i { color: var(--red); }
.letter-chigu { color: var(--black); }
.title-terrace {
  display: block;
  color: var(--blue);
  -webkit-text-stroke: 2px var(--black);
}

.hero-tagline {
  font-size: clamp(1.4rem, 4vw, 2.2rem);
  font-weight: 900;
  margin-bottom: 8px;
}
.tagline-jp {
  background: var(--red);
  color: var(--white);
  padding: 4px 16px;
  display: inline-block;
  border: 2px solid var(--black);
}

.hero-sub {
  font-size: 1.1rem;
  font-weight: 500;
  color: #444;
  margin-bottom: 32px;
  letter-spacing: 2px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.btn-primary, .btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 700;
  border: var(--border);
  cursor: pointer;
  transition: var(--transition);
}
.btn-primary {
  background: var(--red);
  color: var(--white);
  box-shadow: var(--shadow);
}
.btn-primary:hover {
  transform: translate(-4px, -4px);
  box-shadow: var(--shadow-hover);
  background: #B71C1C;
}
.btn-secondary {
  background: var(--white);
  color: var(--black);
  box-shadow: var(--shadow);
}
.btn-secondary:hover {
  transform: translate(-4px, -4px);
  box-shadow: var(--shadow-hover);
  background: var(--yellow);
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  padding: 20px 32px;
  background: var(--white);
  border: var(--border);
  box-shadow: var(--shadow);
  flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-number {
  display: block;
  font-family: var(--font-en);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--red);
  line-height: 1;
}
.stat-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: #666;
  margin-top: 4px;
  letter-spacing: 1px;
}
.stat-divider { width: 3px; height: 48px; background: var(--black); }

.hero-scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 2px;
  color: #666;
}
.scroll-arrow {
  width: 24px;
  height: 24px;
  border-right: 3px solid var(--black);
  border-bottom: 3px solid var(--black);
  transform: rotate(45deg);
  animation: scrollBounce 1.5s ease infinite;
}
@keyframes scrollBounce {
  0%,100%{transform:rotate(45deg) translateY(0)}
  50%{transform:rotate(45deg) translateY(6px)}
}

/* ===== REVEAL ANIMATIONS ===== */
.reveal-up, .reveal-left, .reveal-right {
  opacity: 0;
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal-up    { transform: translateY(50px); }
.reveal-left  { transform: translateX(-50px); }
.reveal-right { transform: translateX(50px); }
.reveal-up.visible, .reveal-left.visible, .reveal-right.visible {
  opacity: 1; transform: none;
}
.delay-1 { transition-delay: 0.1s !important; }
.delay-2 { transition-delay: 0.2s !important; }
.delay-3 { transition-delay: 0.3s !important; }
.delay-4 { transition-delay: 0.4s !important; }
.delay-5 { transition-delay: 0.5s !important; }

/* ===== SECTION COMMONS ===== */
section { padding: 100px 0; }
.section-eyebrow {
  display: block;
  font-family: var(--font-en);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 4px;
  color: var(--red);
  margin-bottom: 12px;
}
.section-eyebrow.white { color: var(--yellow); }
.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
}
.section-desc {
  font-size: 1rem;
  color: #555;
  max-width: 600px;
}
.section-header {
  text-align: center;
  margin-bottom: 60px;
}
.section-header .section-desc { margin: 0 auto; }

/* ===== MISSION ===== */
.section-mission {
  background: var(--white);
  position: relative;
  overflow: hidden;
}
.mission-mondrian-left {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 12px;
  display: flex;
  flex-direction: column;
}
.mm-block { flex: 1; }
.mm-block.red    { background: var(--red); }
.mm-block.blue   { background: var(--blue); }
.mm-block.yellow { background: var(--yellow); }

.section-mission .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.mission-body {
  font-size: 1.05rem;
  line-height: 1.9;
  color: #333;
  margin-bottom: 16px;
}
.mission-body strong { color: var(--red); font-weight: 900; }

.mission-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.m-card {
  border: var(--border);
  padding: 20px 14px;
  cursor: default;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  background: var(--white);
}
.m-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 4px;
}
.m-card[data-color="red"]::before    { background: var(--red); }
.m-card[data-color="blue"]::before   { background: var(--blue); }
.m-card[data-color="yellow"]::before { background: var(--yellow); }
.m-card:hover {
  transform: translate(-4px, -4px);
  box-shadow: var(--shadow);
}
.m-card-icon {
  font-size: 1.8rem;
  margin-bottom: 10px;
}
.m-card[data-color="red"]    .m-card-icon { color: var(--red); }
.m-card[data-color="blue"]   .m-card-icon { color: var(--blue); }
.m-card[data-color="yellow"] .m-card-icon { color: var(--black); }
.m-card[data-color="white"]  .m-card-icon { color: #555; }
.m-card h3 {
  font-size: 0.85rem;
  font-weight: 900;
  margin-bottom: 4px;
}
.m-card p {
  font-size: 0.72rem;
  color: #666;
  line-height: 1.5;
}

/* ===== STAGES ===== */
.section-stages {
  background: var(--black);
  color: var(--white);
  position: relative;
}
.section-stages .section-eyebrow { color: var(--yellow); }
.section-stages .section-title   { color: var(--white); }
.section-stages .section-desc    { color: #aaa; }

.stages-wrapper {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.stage-card {
  border: 3px solid;
  padding: 32px 24px;
  position: relative;
  transition: var(--transition);
  cursor: default;
}
.stage-card:hover {
  transform: translateY(-8px);
  box-shadow: 8px 8px 0 rgba(255,255,255,0.2);
}
.stage-red    { border-color: var(--red);    background: rgba(211,47,47,0.1); }
.stage-blue   { border-color: var(--blue);   background: rgba(21,101,192,0.1); }
.stage-yellow { border-color: var(--yellow); background: rgba(253,216,53,0.1); }

.stage-number {
  font-family: var(--font-en);
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: 3px;
  margin-bottom: 16px;
  opacity: 0.7;
}
.stage-number span {
  font-size: 3rem;
  display: block;
  line-height: 1;
  margin-top: -4px;
}
.stage-red    .stage-number span { color: var(--red); }
.stage-blue   .stage-number span { color: #5B9CF6; }
.stage-yellow .stage-number span { color: var(--yellow); }

.stage-icon-wrap {
  display: flex;
  gap: 12px;
  font-size: 2rem;
  margin-bottom: 16px;
}
.stage-red    .stage-icon-wrap { color: var(--red); }
.stage-blue   .stage-icon-wrap { color: #5B9CF6; }
.stage-yellow .stage-icon-wrap { color: var(--yellow); }

.stage-content h3 {
  font-size: 1.2rem;
  font-weight: 900;
  margin-bottom: 12px;
  line-height: 1.4;
}
.stage-content p { font-size: 0.85rem; color: #ccc; line-height: 1.7; margin-bottom: 16px; }
.stage-list { display: flex; flex-direction: column; gap: 6px; }
.stage-list li {
  font-size: 0.8rem;
  color: #bbb;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.stage-list li i { font-size: 0.7rem; margin-top: 4px; }
.stage-red    .stage-list li i { color: var(--red); }
.stage-blue   .stage-list li i { color: #5B9CF6; }
.stage-yellow .stage-list li i { color: var(--yellow); }

.stage-tag {
  position: absolute;
  bottom: 16px; right: 16px;
  font-size: 0.65rem;
  font-family: var(--font-en);
  letter-spacing: 2px;
  opacity: 0.4;
}

.stage-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.flow-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  color: #ccc;
}
.flow-dot {
  width: 16px; height: 16px;
  border-radius: 50%;
  border: 2px solid var(--white);
}
.flow-dot.red    { background: var(--red); }
.flow-dot.blue   { background: var(--blue); }
.flow-dot.yellow { background: var(--yellow); }
.flow-dot.black  { background: var(--white); }
.flow-arrow { color: #666; font-size: 1.2rem; }

/* ===== ACTIVITIES (TABS) ===== */
.section-activities { background: var(--gray); }

.activities-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
  justify-content: center;
}
.tab-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  font-family: var(--font-jp);
  font-size: 0.85rem;
  font-weight: 700;
  border: var(--border);
  background: var(--white);
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 3px 3px 0 var(--black);
}
.tab-btn:hover, .tab-btn.active {
  background: var(--black);
  color: var(--white);
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--red);
}

.tab-contents { position: relative; }
.tab-content { display: none; }
.tab-content.active { display: block; }

.tab-inner {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 48px;
  align-items: start;
  background: var(--white);
  border: var(--border);
  box-shadow: var(--shadow);
  padding: 48px;
  animation: tabFadeIn 0.4s ease;
}
@keyframes tabFadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: none; }
}

.tab-icon-big {
  width: 160px; height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  border: var(--border);
  flex-shrink: 0;
}
.tab-icon-big.red    { background: var(--red);    color: var(--white); }
.tab-icon-big.blue   { background: var(--blue);   color: var(--white); }
.tab-icon-big.yellow { background: var(--yellow); color: var(--black); box-shadow: var(--shadow); }

.tab-text h3 {
  font-size: 1.6rem;
  font-weight: 900;
  margin-bottom: 16px;
  border-bottom: var(--border);
  padding-bottom: 12px;
}
.tab-text p { font-size: 1rem; color: #555; margin-bottom: 24px; line-height: 1.8; }
.tab-text ul { display: flex; flex-direction: column; gap: 10px; }
.tab-text li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.5;
}
.tab-text li i { color: var(--red); margin-top: 4px; flex-shrink: 0; }

/* ===== TARGET ===== */
.section-target { background: var(--white); }

.target-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}
.target-card {
  border: var(--border);
  padding: 32px 24px;
  text-align: center;
  position: relative;
  transition: var(--transition);
  cursor: default;
  overflow: hidden;
}
.target-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 6px;
}
.target-card[data-color="red"]::after    { background: var(--red); }
.target-card[data-color="blue"]::after   { background: var(--blue); }
.target-card[data-color="yellow"]::after { background: var(--yellow); }
.target-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
}
.target-icon {
  width: 72px; height: 72px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin: 0 auto 20px;
  border: var(--border);
}
.target-card[data-color="red"]    .target-icon { background: var(--red);    color: var(--white); }
.target-card[data-color="blue"]   .target-icon { background: var(--blue);   color: var(--white); }
.target-card[data-color="yellow"] .target-icon { background: var(--yellow); color: var(--black); }
.target-card h3 { font-size: 1.1rem; font-weight: 900; margin-bottom: 12px; }
.target-card p  { font-size: 0.88rem; color: #555; line-height: 1.7; margin-bottom: 20px; }
.target-tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 0.72rem;
  font-weight: 700;
  border: 2px solid var(--black);
  background: var(--gray);
}

/* 診断ボックス */
.quiz-box {
  background: var(--black);
  color: var(--white);
  padding: 40px 48px;
  text-align: center;
  border: var(--border);
  box-shadow: var(--shadow);
}
.quiz-box h3 {
  font-size: 1.4rem;
  font-weight: 900;
  margin-bottom: 12px;
  color: var(--yellow);
}
.quiz-box p { font-size: 0.95rem; color: #ccc; margin-bottom: 24px; }
.btn-quiz {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--yellow);
  color: var(--black);
  font-size: 1rem;
  font-weight: 700;
  border: 2px solid var(--yellow);
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 4px 4px 0 var(--yellow);
}
.btn-quiz:hover {
  background: var(--red);
  color: var(--white);
  border-color: var(--red);
  box-shadow: 4px 4px 0 rgba(255,255,255,0.3);
  transform: translate(-2px,-2px);
}

/* ===== QUIZ MODAL ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.8);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}
.modal-overlay.open { opacity: 1; visibility: visible; }

.modal-box {
  background: var(--white);
  border: var(--border-thick);
  box-shadow: var(--shadow-hover);
  max-width: 560px;
  width: 100%;
  padding: 48px 40px;
  position: relative;
  animation: modalIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes modalIn {
  from { transform: scale(0.8) translateY(40px); opacity: 0; }
  to   { transform: scale(1) translateY(0); opacity: 1; }
}

.modal-close {
  position: absolute;
  top: 16px; right: 16px;
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border: var(--border);
  transition: var(--transition);
}
.modal-close:hover { background: var(--red); color: var(--white); }

.quiz-step { display: none; }
.quiz-step.active { display: block; }

.quiz-progress {
  height: 6px;
  background: #eee;
  border: 1px solid #ccc;
  margin-bottom: 20px;
  overflow: hidden;
}
.quiz-progress span {
  display: block;
  height: 100%;
  background: var(--red);
  transition: width 0.5s ease;
}
.quiz-q-num {
  font-size: 0.75rem;
  font-weight: 700;
  color: #888;
  letter-spacing: 2px;
  margin-bottom: 8px;
}
.quiz-step h3 { font-size: 1.2rem; font-weight: 900; margin-bottom: 24px; }
.quiz-options { display: flex; flex-direction: column; gap: 12px; }
.quiz-opt {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border: var(--border);
  background: var(--white);
  cursor: pointer;
  font-family: var(--font-jp);
  font-size: 0.95rem;
  font-weight: 600;
  text-align: left;
  transition: var(--transition);
  box-shadow: 3px 3px 0 var(--black);
}
.quiz-opt:hover {
  background: var(--yellow);
  transform: translate(-2px,-2px);
  box-shadow: 5px 5px 0 var(--black);
}

.quiz-result-content { text-align: center; }
.result-icon { font-size: 4rem; margin-bottom: 16px; }
.result-title { font-size: 1.8rem; font-weight: 900; margin-bottom: 16px; }
.result-desc { font-size: 1rem; color: #555; line-height: 1.7; margin-bottom: 32px; }
.result-btn { display: inline-flex; }

/* ===== ECOSYSTEM ===== */
.section-ecosystem {
  background: var(--white);
  position: relative;
  overflow: hidden;
}
.eco-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,0,0,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.eco-diagram {
  position: relative;
  width: 500px;
  height: 500px;
  margin: 0 auto;
}

.eco-center {
  position: absolute;
  inset: 50%;
  transform: translate(-50%, -50%);
}
.eco-hub {
  width: 120px; height: 120px;
  background: var(--black);
  color: var(--white);
  border: var(--border-thick);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  position: absolute;
  top: -60px; left: -60px;
  box-shadow: var(--shadow);
  z-index: 2;
  text-align: center;
}
.eco-hub i { font-size: 1.6rem; color: var(--yellow); }
.eco-hub span { font-size: 0.65rem; font-weight: 700; line-height: 1.3; }

.eco-nodes { position: absolute; inset: 0; }
.eco-node {
  position: absolute;
  width: 90px; height: 90px;
  border: 3px solid;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  font-size: 0.6rem;
  font-weight: 700;
  text-align: center;
  line-height: 1.3;
  cursor: default;
  transition: var(--transition);
  top: calc(50% + sin(var(--angle)) * 180px - 45px);
  left: calc(50% + cos(var(--angle)) * 180px - 45px);
}
.eco-node.red    { border-color: var(--red);    background: rgba(211,47,47,0.08); }
.eco-node.blue   { border-color: var(--blue);   background: rgba(21,101,192,0.08); }
.eco-node.yellow { border-color: var(--yellow); background: rgba(253,216,53,0.15); }
.eco-node:hover { transform: scale(1.1); box-shadow: var(--shadow); }
.eco-node-icon {
  font-size: 1.4rem;
  margin-bottom: 4px;
}
.eco-node.red    .eco-node-icon { color: var(--red); }
.eco-node.blue   .eco-node-icon { color: var(--blue); }
.eco-node.yellow .eco-node-icon { color: var(--black); }

/* ===== POSTERS ===== */
.section-posters { background: var(--gray); }

.poster-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.poster-item {
  position: relative;
  overflow: hidden;
  border: var(--border);
  cursor: pointer;
  transition: var(--transition);
  background: #eee;
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.poster-item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform 0.5s ease;
  max-height: 500px;
}
.poster-item:hover img { transform: scale(1.04); }
.poster-item:hover { box-shadow: var(--shadow-hover); transform: translate(-4px,-4px); }
.poster-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--white);
  font-weight: 700;
  font-size: 0.85rem;
  transition: background 0.3s ease;
  opacity: 0;
}
.poster-item:hover .poster-overlay {
  background: rgba(0,0,0,0.5);
  opacity: 1;
}
.poster-overlay i { font-size: 2rem; }
.poster-logo { grid-column: span 1; }

/* ===== LIGHTBOX ===== */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.92);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}
.lightbox.open { opacity: 1; visibility: visible; }
.lb-content {
  max-width: 90vw;
  max-height: 90vh;
  text-align: center;
}
.lb-content img {
  max-width: 90vw;
  max-height: 80vh;
  object-fit: contain;
  border: 4px solid var(--white);
}
.lb-content p {
  color: var(--white);
  font-size: 0.9rem;
  margin-top: 12px;
  font-weight: 600;
}
.lb-close {
  position: absolute;
  top: 24px; right: 24px;
  background: var(--red);
  border: 3px solid var(--white);
  color: var(--white);
  font-size: 1.2rem;
  width: 44px; height: 44px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.lb-close:hover { background: var(--white); color: var(--black); }
.lb-prev, .lb-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: var(--white);
  border: var(--border);
  width: 48px; height: 48px;
  font-size: 1.2rem;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.lb-prev:hover, .lb-next:hover { background: var(--yellow); }
.lb-prev { left: 24px; }
.lb-next { right: 24px; }

/* ===== TIMELINE ===== */
.section-timeline { background: var(--white); }
.timeline-wrapper {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.timeline-line {
  position: absolute;
  left: 50%;
  top: 0; bottom: 0;
  width: 4px;
  background: var(--black);
  transform: translateX(-50%);
}

.tl-item {
  display: flex;
  align-items: flex-start;
  gap: 32px;
  padding: 32px 0;
  position: relative;
}
.tl-item:nth-child(even) {
  flex-direction: row-reverse;
}
.tl-dot {
  position: absolute;
  left: 50%;
  top: 40px;
  transform: translate(-50%, 0);
  width: 20px; height: 20px;
  border-radius: 50%;
  border: 4px solid var(--white);
  z-index: 2;
  box-shadow: 0 0 0 3px var(--black);
}
.tl-dot.red    { background: var(--red); }
.tl-dot.blue   { background: var(--blue); }
.tl-dot.yellow { background: var(--yellow); }

.tl-card {
  width: calc(50% - 40px);
  border: var(--border);
  padding: 24px;
  background: var(--white);
  transition: var(--transition);
}
.tl-card:hover {
  transform: translate(-4px,-4px);
  box-shadow: var(--shadow);
}
.tl-period {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  background: var(--yellow);
  color: var(--black);
  padding: 3px 10px;
  border: 1px solid var(--black);
  margin-bottom: 8px;
  letter-spacing: 1px;
}
.tl-card h3 { font-size: 1.1rem; font-weight: 900; margin-bottom: 8px; }
.tl-card p  { font-size: 0.85rem; color: #555; line-height: 1.7; }

/* ===== JOIN ===== */
.section-join {
  background: var(--black);
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.join-mondrian-bg { position: absolute; inset: 0; pointer-events: none; }
.jm-block { position: absolute; width: 200px; height: 200px; opacity: 0.06; }
.jm-block.red    { background: var(--red); }
.jm-block.blue   { background: var(--blue); }
.jm-block.yellow { background: var(--yellow); }
.jm-block.tl { top: 0; left: 0; }
.jm-block.tr { top: 0; right: 0; }
.jm-block.bl { bottom: 0; left: 0; }
.jm-block.br { bottom: 0; right: 0; }

.join-content {
  text-align: center;
  position: relative;
  z-index: 2;
  max-width: 700px;
  margin: 0 auto;
}
.join-title {
  font-family: var(--font-en);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 900;
  color: var(--yellow);
  -webkit-text-stroke: 2px var(--yellow);
  margin-bottom: 8px;
}
.join-sub {
  font-size: 1rem;
  color: #888;
  margin-bottom: 24px;
  font-family: var(--font-en);
  letter-spacing: 3px;
}
.join-desc {
  font-size: 1rem;
  line-height: 1.9;
  color: #ccc;
  margin-bottom: 40px;
}

.join-roles {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 40px;
}
.role-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: 2px solid var(--white);
  font-size: 0.9rem;
  font-weight: 700;
  transition: var(--transition);
  cursor: default;
}
.role-badge:hover {
  background: var(--yellow);
  color: var(--black);
  border-color: var(--yellow);
  transform: translateY(-4px);
}

.join-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  margin-bottom: 40px;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: #aaa;
}
.contact-item i { color: var(--yellow); width: 20px; text-align: center; }

.btn-join {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 40px;
  background: var(--yellow);
  color: var(--black);
  font-size: 1.1rem;
  font-weight: 700;
  border: 3px solid var(--yellow);
  box-shadow: 5px 5px 0 var(--yellow);
  transition: var(--transition);
}
.btn-join:hover {
  background: var(--red);
  color: var(--white);
  border-color: var(--red);
  box-shadow: 5px 5px 0 rgba(255,255,255,0.2);
  transform: translate(-3px,-3px);
}

/* パーティクル */
.particles { position: absolute; inset: 0; pointer-events: none; z-index: 1; }
.particle {
  position: absolute;
  width: 8px; height: 8px;
  border: 2px solid;
  animation: particleFloat linear infinite;
}
.particle.r { border-color: var(--red); }
.particle.b { border-color: var(--blue); }
.particle.y { border-color: var(--yellow); }
@keyframes particleFloat {
  0%   { transform: translateY(0) rotate(0deg); opacity: 0; }
  10%  { opacity: 1; }
  90%  { opacity: 1; }
  100% { transform: translateY(-400px) rotate(720deg); opacity: 0; }
}

/* ===== FOOTER ===== */
.site-footer {
  background: var(--white);
  border-top: var(--border-thick);
  padding: 40px 0 24px;
  text-align: center;
}
.footer-logo {
  font-family: var(--font-en);
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 8px;
}
.footer-tagline {
  font-size: 0.85rem;
  color: #555;
  margin-bottom: 8px;
  font-weight: 600;
  letter-spacing: 1px;
}
.footer-credit { font-size: 0.75rem; color: #999; margin-bottom: 24px; }
.footer-mondrian {
  display: flex;
  height: 8px;
  overflow: hidden;
}
.fm { flex: 1; }
.fm.red    { background: var(--red); }
.fm.blue   { background: var(--blue); }
.fm.yellow { background: var(--yellow); }
.fm.white  { background: #ddd; }

/* ===== BACK TO TOP ===== */
.back-to-top {
  position: fixed;
  bottom: 32px; right: 32px;
  width: 48px; height: 48px;
  background: var(--black);
  color: var(--white);
  border: var(--border);
  font-size: 1rem;
  cursor: pointer;
  z-index: 100;
  display: flex; align-items: center; justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow);
}
.back-to-top.visible {
  opacity: 1; visibility: visible;
}
.back-to-top:hover {
  background: var(--red);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .section-mission .container { grid-template-columns: 1fr; gap: 48px; }
  .stages-wrapper { grid-template-columns: 1fr; max-width: 500px; margin: 0 auto 48px; }
  .eco-diagram { width: 360px; height: 360px; }
  .eco-hub { width: 100px; height: 100px; top: -50px; left: -50px; }
  .eco-node { width: 72px; height: 72px; font-size: 0.55rem; }
  .eco-node { top: calc(50% + sin(var(--angle)) * 140px - 36px); left: calc(50% + cos(var(--angle)) * 140px - 36px); }
}

@media (max-width: 768px) {
  section { padding: 64px 0; }
  .nav-links { display: none; }
  .hamburger { display: flex; }

  .hero-title { font-size: clamp(3rem, 15vw, 5rem); }
  .mission-cards { grid-template-columns: repeat(2, 1fr); }
  .target-cards { grid-template-columns: 1fr; max-width: 360px; margin: 0 auto 48px; }
  .tab-inner { grid-template-columns: 1fr; gap: 24px; padding: 28px; }
  .tab-icon-big { width: 80px; height: 80px; font-size: 2rem; }
  .poster-grid { grid-template-columns: 1fr; }
  .timeline-line { display: none; }
  .tl-item, .tl-item:nth-child(even) { flex-direction: column; gap: 12px; }
  .tl-dot { display: none; }
  .tl-card { width: 100%; }
  .eco-diagram { width: 300px; height: 300px; }
  .eco-node { width: 64px; height: 64px; font-size: 0.5rem; }
  .eco-node { top: calc(50% + sin(var(--angle)) * 110px - 32px); left: calc(50% + cos(var(--angle)) * 110px - 32px); }
  .activities-tabs { flex-direction: column; align-items: stretch; }
  .tab-btn { justify-content: center; }
  .join-roles { gap: 8px; }
}

@media (max-width: 480px) {
  .hero-buttons { flex-direction: column; align-items: center; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .stat-divider { width: 80%; height: 3px; }
  .mission-cards { grid-template-columns: 1fr; }
  .modal-box { padding: 32px 24px; }
}