:root {
  /* 永賢組モック・ブランドレッドパレット（NAGAKENロゴの赤グラデに馴染む建設系レッド）
     ※ CLOUDPOWER Palette 例外。旧・建設業グリーンから赤ベーストーンへ統一（2026-06-05）。 */
  --nagaken-primary: #C8102E;        /* ブランドレッド（NAGAKENロゴ赤） */
  --nagaken-primary-deep: #9E0C24;   /* hover・リンク（濃い赤） */
  --nagaken-primary-dark: #6E0A1A;   /* 見出し・ダーク文字（さらに濃い赤） */
  --nagaken-accent: #F0AD00;         /* 警告黄（建設現場定番・視認性のため維持） */
  --nagaken-bg: #FBF3F4;             /* 薄い赤がかった背景 */
  --nagaken-border: #E8C9CE;         /* 薄い赤境界線 */
  --nagaken-body: #3A2B2D;           /* 本文（赤寄りグレー） */
  --nagaken-safety-red: #B00020;     /* 危険・強制退場（基調と分けた濃い警告赤） */
  --nagaken-primary-rgb: 200, 16, 46;/* rgba() 用（旧 46,139,62 を置換） */
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}

body {
  font-family: -apple-system, "Hiragino Sans", "Yu Gothic UI", "Meiryo", sans-serif;
  background: var(--nagaken-bg);
  color: var(--nagaken-body);
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 16px 80px;
}

h1 {
  margin: 0 0 16px;
  font-size: clamp(18px, 5vw, 22px);
  color: var(--nagaken-primary-dark);
  border-bottom: 2px solid var(--nagaken-primary);
  padding-bottom: 8px;
}

h2 {
  font-size: clamp(15px, 4vw, 17px);
  margin: 20px 0 8px;
  color: #374151;
}

.card {
  background: #fff;
  border: 1px solid var(--nagaken-border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 12px;
}

label {
  display: block;
  font-size: 13px;
  color: #4b5563;
  margin-top: 10px;
  margin-bottom: 4px;
  font-weight: 500;
}

input[type=text], input[type=tel], input[type=number], input[type=date],
select, textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  font-size: 16px; /* iOS Safari: 16px以上でauto-zoom抑制 */
  background: #fff;
  min-height: 44px;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--nagaken-primary);
  box-shadow: 0 0 0 2px rgba(var(--nagaken-primary-rgb), 0.25);
}

.row2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.row3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  background: var(--nagaken-primary);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  min-height: 44px;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.btn:hover { background: var(--nagaken-primary-deep); }
.btn:disabled { background: #9ca3af; cursor: not-allowed; }

.btn-accent { background: var(--nagaken-accent); color: #1A3A5C; }
.btn-accent:hover { background: #D89500; }

.btn-danger { background: #DC3545; }
.btn-danger:hover { background: #B02A37; }

.btn-ghost {
  background: transparent;
  color: var(--nagaken-primary);
  border: 1px solid var(--nagaken-primary);
}

.btn-block { width: 100%; }

.btn-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn-group > .btn { flex: 1 1 auto; min-width: 120px; }

.nav {
  background: var(--nagaken-primary);
  color: #fff;
  padding: 12px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav a { color: #fff; text-decoration: none; font-weight: 600; white-space: nowrap; }
.nav h3 {
  margin: 0;
  font-size: clamp(14px, 4vw, 16px);
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  background: #E2F0E5;
  color: var(--nagaken-primary-deep);
}

.badge-success { background: #D4EDDA; color: #155724; }
.badge-warn { background: #FFF3CD; color: #856404; }
.badge-danger { background: #F8D7DA; color: #721C24; }

.alert {
  padding: 12px;
  border-radius: 6px;
  margin: 10px 0;
  font-size: 14px;
}

.alert-info { background: #E2F0E5; color: var(--nagaken-primary-dark); border-left: 4px solid var(--nagaken-primary); }
.alert-success { background: #D4EDDA; color: #155724; border-left: 4px solid var(--nagaken-primary); }
.alert-warn { background: #FFF3CD; color: #856404; border-left: 4px solid var(--nagaken-accent); }
.alert-error { background: #F8D7DA; color: #721C24; border-left: 4px solid var(--nagaken-safety-red); }

.video-wrap {
  position: relative;
  width: 100%;
  max-width: 420px;
  aspect-ratio: 4 / 3;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  margin: 12px auto;
}

.video-wrap video, .video-wrap canvas {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.countdown-big {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  font-size: clamp(60px, 20vw, 120px);
  color: #fff;
  text-shadow: 0 2px 12px rgba(0,0,0,0.9);
  font-weight: 800;
  line-height: 1;
  pointer-events: none;
}

.thumb {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: 4px;
  background: #e5e7eb;
  flex-shrink: 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  min-width: 600px;
}

th, td {
  padding: 8px;
  text-align: left;
  border-bottom: 1px solid var(--nagaken-border);
  vertical-align: middle;
}

th {
  background: #f3f4f6;
  font-weight: 600;
  color: #374151;
  white-space: nowrap;
}

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 0 -8px;
  padding: 0 8px;
}

.tabs {
  display: flex;
  border-bottom: 2px solid var(--nagaken-border);
  margin: 16px 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.tabs::-webkit-scrollbar { display: none; }

.tab {
  padding: 10px 16px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 14px;
  color: #6b7280;
  font-weight: 500;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  white-space: nowrap;
  min-height: 44px;
}

.tab.active {
  color: var(--nagaken-primary);
  border-bottom-color: var(--nagaken-primary);
}

.loading {
  text-align: center;
  padding: 40px;
  color: #6b7280;
}

.muted { color: #6b7280; font-size: 13px; }

@media (max-width: 500px) {
  .row2, .row3 { grid-template-columns: 1fr; }
  .wrap { padding: 14px 12px 80px; }
  .card { padding: 14px; }
}

@media (max-width: 380px) {
  .nav { padding: 10px 12px; }
  .btn { padding: 10px 14px; font-size: 14px; }
}