/* Main styles */
:root {
  --green: #10B981;
  --bg: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --nav-h: 48px;
}

* {
  box-sizing: border-box
}

html {
  scroll-behavior: smooth
}

body {
  margin: 0;
  font-family: 'Noto Sans JP', system-ui, -apple-system, 'Segoe UI', Roboto, 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
  color: var(--text);
  background: #f8fafc;
  overflow-x: hidden;
}

/* Fixed background layers */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: -2;
  background-repeat: no-repeat;
  background-position: center top;
  background-size: cover;
  opacity: 1;
  transition: opacity .6s ease;
}

.bg-layer.main {
  z-index: -2;
  opacity: 0;
  background-image: url('../images/background_placeholder.png');
}

.bg-layer.feature {
  z-index: -1;
  opacity: 1;
  background-image: url('../images/feature_bg_pc.png');
}

@media (max-width: 600px) {
  .bg-layer.feature {
    background-image: url('../images/feature_bg_mobile.png');
  }
}

@media (min-width: 601px) and (max-width: 1024px) {
  .bg-layer.feature {
    background-image: url('../images/feature_bg_tablet.png');
  }
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 16px;
  background: #ffffffcc;
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #e2e8f0;
  z-index: 1000;
}

.navbar .brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.navbar .brand img {
  height: 28px;
  width: auto;
}

.navbar .brand .name {
  font-weight: 700;
  letter-spacing: .2px;
}

.navbar .spacer {
  flex: 1
}

.navbar .links a {
  margin: 0 8px;
  text-decoration: none;
  color: var(--text);
  font-size: 14px;
}

.navbar .links a:hover {
  color: var(--green)
}

.navbar .lang-toggle,
.navbar .menu-toggle {
  border: 1px solid #cbd5e1;
  background: #fff;
  padding: 6px 10px;
  border-radius: 10px;
  cursor: pointer;
}

.navbar .menu-toggle {
  display: none;
}

@media (max-width: 1024px) {
  .navbar .links {
    position: absolute;
    top: var(--nav-h);
    left: 8px;
    right: 8px;
    display: none;
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(2, 6, 23, 0.12);
    padding: 8px;
  }

  .navbar .links.show {
    display: block;
  }

  .navbar .links a {
    display: block;
    padding: 10px 12px;
    margin: 0;
    border-radius: 8px;
  }

  .navbar .links a:hover {
    background: #f8fafc;
  }
}

/* Sections */
section {
  padding: 14px 14px;
}

section .wrap {
  max-width: 1100px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 18px;
  box-shadow: 0 8px 24px rgba(2, 6, 23, 0.07);
  padding: 20px;
}

h2 {
  margin: 0 0 12px 0;
  font-size: 24px;
}

p.lead {
  color: var(--muted);
  margin: 0 0 10px
}

/* Feature spacer */
#feature-spacer {
  height: 75vh;
  padding: 0;
}

#feature-spacer .wrap {
  background: transparent;
  box-shadow: none;
  padding: 0;
  border-radius: 0;
}

#feature-spacer .note {
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px 16px;
  color: #1f2937;
  background: rgba(255, 255, 255, 0.6);
  border: 1px dashed #cbd5e1;
  border-radius: 12px;
  backdrop-filter: blur(2px);
}

/* Grids */
.grid {
  display: grid;
  gap: 14px;
}

.grid.cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid.cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

.grid img.tile,
.wrap img.tile {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  background: #fff;
}

/* Table */
.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  border-bottom: 1px solid #e5e7eb;
  padding: 10px;
  text-align: left;
}

.table th {
  background: #f1f5f9;
}

.badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 12px;
}

.badge.status_green {
  border: 1px solid #d1fae5;
  color: #065f46;
  background: #ecfdf5;
}

.badge.status_yellow {
  border: 1px solid #fef9c3;
  color: #78350f;
  background: #fefce8;
}

.badge.status_red {
  border: 1px solid #fee2e2;
  color: #7f1d1d;
  background: #fef2f2;
}

.event_date {
  color: #065f46;
  font-size: smaller;
}

.header-spacer {
  height: var(--nav-h);
}

@media (max-width: 1024px) {
  .grid.cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .navbar .menu-toggle {
    display: inline-block;
  }
}

@media (max-width: 600px) {
  section {
    padding: 12px 12px;
  }

  .grid {
    gap: 12px;
  }

  .grid.cols-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Floating Go-to-Top button */
.go-top {
  position: fixed;
  right: 16px;
  bottom: 16px;
  width: 56px;
  height: 56px;
  border: none;
  border-radius: 50%;
  display: none;
  /* hidden until scrolled */
  align-items: center;
  justify-content: center;
  background: #ffffffcc;
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 24px rgba(2, 6, 23, 0.18);
  cursor: pointer;
  z-index: 1001;
  /* above navbar */
  padding: 0;
}

.go-top img {
  display: block;
  width: 24px;
  height: 24px;
}

.go-top:hover {
  background: #ffffffee;
}

@media (max-width: 600px) {
  .go-top {
    right: 12px;
    bottom: 12px;
    width: 52px;
    height: 52px;
  }
}