/* =============================================
   謎パンダ Hub Styles — Light Mode
   Cute · Rounded · Mysterious
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=M+PLUS+Rounded+1c:wght@400;500;700;800&family=Noto+Sans+JP:wght@400;500;700&display=swap');

:root {
  --bg:           #FFFBF5;
  --bg-card:      #FFFFFF;
  --text-main:    #2D2A26;
  --text-muted:   #8C8078;
  --text-light:   #C4BBB2;

  --pink:         #FF6B9D;
  --pink-light:   #FFE4EF;
  --green:        #6DBF72;
  --green-light:  #E4F5E5;
  --yellow:       #FFD166;
  --yellow-light: #FFF5D6;
  --blue:         #74B9E8;
  --blue-light:   #E0F0FB;
  --purple:       #B07FE8;
  --purple-light: #EEE4FB;
  --orange:       #FF9B6A;
  --orange-light: #FFE8DC;
  --teal:         #5BBFB0;
  --teal-light:   #DCF3F0;

  --panda-black:  #2C2C2C;
  --border:       #EDE8E0;

  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;

  --font: 'M PLUS Rounded 1c', 'Noto Sans JP', sans-serif;
}

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

/* ---- Body ---- */
body {
  background-color: var(--bg);
  color: var(--text-main);
  font-family: var(--font);
  line-height: 1.75;
  min-height: 100vh;
}

/* Soft radial decoration */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 10% 15%,  rgba(255,107,157,.06) 0%, transparent 45%),
    radial-gradient(circle at 90% 80%,  rgba(109,191,114,.06) 0%, transparent 45%),
    radial-gradient(circle at 55% 50%,  rgba(255,209,102,.04) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

/* ---- Layout ---- */
.hub-container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px 100px;
}

/* =============================================
   Header / Hero
   ============================================= */
.hub-header {
  text-align: center;
  padding: 64px 0 36px;
  position: relative;
}

/* Floating paw prints */
.hub-header::before,
.hub-header::after {
  position: absolute;
  font-size: 2.4rem;
  opacity: .10;
  animation: floatPaw 4s ease-in-out infinite;
}
.hub-header::before { content: '🐾'; top: 20px; left: 8%; animation-delay: 0s; }
.hub-header::after  { content: '🐾'; top: 24px; right: 8%; animation-delay: 2s; }

@keyframes floatPaw {
  0%,100% { transform: translateY(0) rotate(-15deg); }
  50%      { transform: translateY(-10px) rotate(-15deg); }
}

/* Panda mascot */
.panda-mascot {
  display: inline-block;
  margin-bottom: 18px;
  filter: drop-shadow(0 6px 16px rgba(0,0,0,.10));
  animation: pandaBounce 3.5s ease-in-out infinite;
}

@keyframes pandaBounce {
  0%,100% { transform: translateY(0); }
  50%      { transform: translateY(-10px); }
}

.hub-header h1 {
  font-size: clamp(3rem, 7vw, 5rem);
  font-weight: 800;
  color: var(--panda-black);
  letter-spacing: .06em;
  line-height: 1.15;
  margin-bottom: 8px;
}
.hub-header h1 .panda-accent { color: var(--pink); }

.hub-tagline {
  font-size: 1.05rem;
  color: var(--text-muted);
  font-weight: 600;
  letter-spacing: .15em;
}

/* =============================================
   Concept Section
   ============================================= */
.concept-section {
  margin: 44px auto 0;
  max-width: 700px;
}

.concept-bubble {
  background: var(--bg-card);
  border: 2.5px solid var(--panda-black);
  border-radius: var(--radius-lg);
  padding: 32px 40px;
  position: relative;
  box-shadow: 5px 5px 0 var(--panda-black);
  text-align: center;
}

/* The "？" badge on top */
.concept-bubble::before {
  content: '？';
  position: absolute;
  top: -22px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--pink);
  color: #fff;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 800;
  border: 2.5px solid var(--panda-black);
  box-shadow: 2px 2px 0 var(--panda-black);
}

.concept-bubble p {
  color: var(--text-main);
  font-size: .98rem;
  line-height: 2;
  font-weight: 500;
}
.concept-bubble .highlight {
  color: var(--pink);
  font-weight: 800;
}

/* =============================================
   Section Title Divider
   ============================================= */
.section-title {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 56px 0 28px;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--panda-black);
  letter-spacing: .05em;
}
.section-title::before,
.section-title::after {
  content: '';
  flex: 1;
  height: 2.5px;
  background: var(--border);
  border-radius: 2px;
}

/* =============================================
   Scenario Grid
   ============================================= */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(316px, 1fr));
  gap: 24px;
}

/* 1枚だけのとき中央寄せ・最大幅制限 */
.scenario-grid--single {
  grid-template-columns: minmax(316px, 480px);
  justify-content: center;
}

/* =============================================
   Scenario Cards
   ============================================= */
.scenario-card {
  display: block;
  background: var(--bg-card);
  border: 2.5px solid var(--panda-black);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: inherit;
  overflow: hidden;
  box-shadow: 5px 5px 0 var(--panda-black);
  transition: transform .18s ease, box-shadow .18s ease;
}
.scenario-card:hover {
  transform: translate(-2px, -3px);
  box-shadow: 7px 8px 0 var(--panda-black);
}
.scenario-card:active {
  transform: translate(2px, 2px);
  box-shadow: 3px 3px 0 var(--panda-black);
}

/* Top accent stripe */
.card-accent-bar {
  height: 7px;
  width: 100%;
}

.card-inner {
  padding: 22px 26px 26px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.scenario-icon { font-size: 2rem; line-height: 1; }

.scenario-id {
  font-size: .78rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: .12em;
  background: var(--bg);
  padding: 3px 12px;
  border-radius: 20px;
  border: 1.5px solid var(--border);
}

.scenario-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--panda-black);
  margin-bottom: 10px;
  line-height: 1.45;
}

.scenario-desc {
  font-size: .88rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
  min-height: 76px;
}

.card-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.tag {
  font-size: .72rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  letter-spacing: .03em;
}

/* ---- Per-card colour themes ---- */
.card-theme-blue   .card-accent-bar { background: var(--blue); }
.card-theme-blue   .tag { background: var(--blue-light);   color: #2B7EC4; }

.card-theme-purple .card-accent-bar { background: var(--purple); }
.card-theme-purple .tag { background: var(--purple-light); color: #7740C8; }

.card-theme-green  .card-accent-bar { background: var(--green); }
.card-theme-green  .tag { background: var(--green-light);  color: #3A8F3E; }

.card-theme-yellow .card-accent-bar { background: var(--yellow); }
.card-theme-yellow .tag { background: var(--yellow-light); color: #B87800; }

.card-theme-orange .card-accent-bar { background: var(--orange); }
.card-theme-orange .tag { background: var(--orange-light); color: #C04C10; }

.card-theme-pink   .card-accent-bar { background: var(--pink); }
.card-theme-pink   .tag { background: var(--pink-light);   color: #C4285A; }

.card-theme-teal   .card-accent-bar { background: var(--teal); }
.card-theme-teal   .tag { background: var(--teal-light);   color: #2A8F82; }

/* =============================================
   Footer
   ============================================= */
.hub-footer {
  text-align: center;
  margin-top: 80px;
  padding-top: 32px;
  border-top: 2px dashed var(--border);
  color: var(--text-muted);
  font-size: .85rem;
  font-weight: 500;
}
.hub-footer .footer-panda {
  font-size: 2rem;
  display: block;
  margin-bottom: 8px;
  animation: pandaBounce 3.5s ease-in-out infinite;
}
.hub-footer .footer-note {
  margin-top: 8px;
  font-size: .76rem;
  opacity: .7;
}

/* =============================================
   Responsive
   ============================================= */
@media (max-width: 768px) {
  .hub-header { padding: 48px 0 28px; }
  .concept-bubble { padding: 26px 22px; }
  .scenario-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .hub-container { padding: 0 16px 72px; }
}