:root {
  --bg:        #07070f;
  --surface:   #0d0d1a;
  --surface2:  #111122;
  --border:    #1e1e3a;
  --border2:   #2a2a50;
  --cyan:      #00e5ff;
  --red:       #ff4d6d;
  --orange:    #ff9500;
  --text:      #d0d0e8;
  --dim:       #5a5a80;
  --dim2:      #3a3a60;
  --cyan-glow: 0 0 24px rgba(0,229,255,0.4);
  --red-glow:  0 0 24px rgba(255,77,109,0.4);
  --font-mono: 'Space Mono', monospace;
  --font-jp:   'Zen Kaku Gothic New', sans-serif;
}

/* ダブルタップズーム無効化 */
* { box-sizing: border-box; margin: 0; padding: 0; touch-action: manipulation; }
*::before, *::after { box-sizing: border-box; }
canvas { touch-action: none; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-jp);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-x: hidden;
  position: relative;
}

body.no-scroll {
  overflow: hidden;
  height: 100dvh;
}

/* 背景グリッド */
body::before {
  content: '';
  position: fixed; inset: 0;
  background-image:
    linear-gradient(rgba(0,229,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

/* スキャンライン */
body::after {
  content: '';
  position: fixed; inset: 0;
  background: repeating-linear-gradient(
    0deg, transparent 0px, transparent 3px,
    rgba(0,0,0,0.08) 3px, rgba(0,0,0,0.08) 4px
  );
  pointer-events: none;
  z-index: 0;
}

/* ═══ 共通コンポーネント ═══════════════════════════════════ */

.screen {
  display: none;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 640px;
  padding: 0 16px;
  position: relative;
  z-index: 1;
}
.screen.active { display: flex; }

/* タイトルバー — ノッチ/ステータスバー対応 */
.title-bar {
  width: 100%;
  padding: 14px 20px;
  padding-top: calc(14px + env(safe-area-inset-top, 0px));
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  position: relative;
  z-index: 2;
}

.logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  background: linear-gradient(90deg, var(--cyan) 30%, var(--red));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.ver-tag {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: var(--dim);
  letter-spacing: 0.2em;
  border: 1px solid var(--border);
  padding: 3px 7px;
}

/* カード */
.card {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 28px;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: 0.4;
}

.card-title {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  color: var(--dim);
  text-transform: uppercase;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-title::before {
  content: '';
  display: block;
  width: 3px;
  height: 12px;
  background: var(--cyan);
}

/* フォーム */
.form-group { margin-bottom: 14px; }

.form-label {
  font-size: 0.7rem;
  color: var(--dim);
  letter-spacing: 0.1em;
  margin-bottom: 6px;
  display: block;
}

input[type="text"] {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border2);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 10px 14px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  letter-spacing: 0.05em;
}

input[type="text"]:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 2px rgba(0,229,255,0.12);
}

input.input-error {
  border-color: var(--red) !important;
  box-shadow: 0 0 0 2px rgba(255,77,109,0.15) !important;
}

input::placeholder { color: var(--dim2); }

/* ボタン */
.btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  padding: 12px 24px;
  border: 1px solid;
  cursor: pointer;
  transition: all 0.18s;
  text-transform: uppercase;
  width: 100%;
  background: transparent;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.18s;
}

.btn:hover::after { opacity: 1; }
.btn:disabled { opacity: 0.35; cursor: not-allowed; }

.btn-cyan {
  border-color: var(--cyan);
  color: var(--cyan);
}
.btn-cyan::after  { background: rgba(0,229,255,0.1); }
.btn-cyan:hover:not(:disabled) { box-shadow: var(--cyan-glow); }

.btn-red {
  border-color: var(--red);
  color: var(--red);
}
.btn-red::after  { background: rgba(255,77,109,0.1); }
.btn-red:hover:not(:disabled) { box-shadow: var(--red-glow); }

.btn-yel {
  border-color: var(--orange);
  color: var(--orange);
}
.btn-yel::after { background: rgba(255,149,0,0.1); }
.btn-yel:hover:not(:disabled) { box-shadow: 0 0 24px rgba(255,149,0,0.4); }

.btn-ghost {
  border-color: var(--border2);
  color: var(--dim);
  font-size: 0.65rem;
}
.btn-ghost:hover:not(:disabled) { border-color: var(--dim); color: var(--text); }

.btn-sm {
  width: auto;
  padding: 8px 18px;
  font-size: 0.65rem;
}

.btn-row {
  display: flex;
  gap: 10px;
  margin-top: 8px;
}

.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 0;
  color: var(--dim);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
}

.divider::before, .divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ═══ ロビー画面 ══════════════════════════════════════════ */
#sente-panel .pip.pip-active { background: var(--cyan); }
#gote-panel  .pip.pip-active { background: var(--red); }

#screen-lobby {
  padding-top: 0;
  gap: 0;
}

.lobby-header {
  width: 100%;
  padding: 48px 28px 32px;
  text-align: center;
}

.lobby-title {
  font-family: var(--font-mono);
  font-size: 2.4rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  background: linear-gradient(135deg, var(--cyan) 0%, #0080ff 50%, var(--red) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 10px;
}

.lobby-subtitle {
  font-size: 0.72rem;
  color: var(--dim);
  letter-spacing: 0.25em;
  text-transform: uppercase;
}

.lobby-card { margin-bottom: 12px; }

/* ═══ 待機画面 ════════════════════════════════════════════ */

#screen-waiting {
  gap: 16px;
  padding-top: 40px;
}

.waiting-icon {
  font-size: 3rem;
  animation: pulse-icon 2s ease-in-out infinite;
}

@keyframes pulse-icon {
  0%,100% { opacity: 0.6; transform: scale(0.95); }
  50% { opacity: 1; transform: scale(1.05); }
}

.code-display {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: 0.4em;
  color: var(--cyan);
  text-shadow: var(--cyan-glow);
  text-align: center;
  padding: 20px;
  border: 1px solid var(--border2);
  background: var(--surface2);
  width: 100%;
}

.waiting-msg {
  font-size: 0.78rem;
  color: var(--dim);
  letter-spacing: 0.12em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.dot-anim span {
  display: inline-block;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--cyan);
  animation: dot-blink 1.2s infinite;
}
.dot-anim span:nth-child(2) { animation-delay: 0.2s; }
.dot-anim span:nth-child(3) { animation-delay: 0.4s; }

@keyframes dot-blink {
  0%,80%,100% { opacity: 0.2; transform: scale(0.7); }
  40% { opacity: 1; transform: scale(1.2); }
}

/* ═══ ゲーム画面 ══════════════════════════════════════════ */

#screen-game {
  padding-top: 0;
  padding-bottom: 24px;
  gap: 0;
  min-height: 100dvh;
}

/* プレイヤーパネル行 */
.players-row {
  display: flex;
  gap: 8px;
  width: 100%;
  padding: 10px 0;
}

.player-panel {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 12px 14px;
  position: relative;
  transition: border-color 0.25s, box-shadow 0.25s;
}

.player-panel::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  opacity: 0;
  transition: opacity 0.25s;
}

#sente-panel::after { background: var(--cyan); }
#gote-panel::after  { background: var(--red); }

.player-panel.panel-active {
  border-color: var(--border2);
}
#sente-panel.panel-active {
  border-color: var(--cyan);
  box-shadow: 0 0 16px rgba(0,229,255,0.2);
}
#gote-panel.panel-active {
  border-color: var(--red);
  box-shadow: 0 0 16px rgba(255,77,109,0.2);
}
.player-panel.panel-active::after { opacity: 1; }

.p-label {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.2em;
  color: var(--dim);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.p-name {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 6px;
}

.p-walls {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.65rem;
  color: var(--dim);
}

.wall-pips {
  display: flex;
  gap: 3px;
}

.pip {
  width: 12px; height: 5px;
  border-radius: 1px;
  background: var(--border2);
  transition: background 0.2s;
}

/* Canvasエリア */
.canvas-wrap {
  width: 100%;
  display: flex;
  justify-content: center;
  background: var(--surface);
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
}

canvas {
  display: block;
  cursor: pointer;
  image-rendering: pixelated;
}

/* ── コントロールバー（マウス用）: タッチデバイスでは非表示 */
.control-bar {
  width: 100%;
  display: flex;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: none;
  padding: 8px 10px;
}

.mode-btn {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  padding: 8px 14px;
  background: var(--surface2);
  border: 1px solid var(--border2);
  color: var(--dim);
  cursor: pointer;
  transition: all 0.18s;
  flex: 1;
  text-transform: uppercase;
}

.mode-btn:hover:not(:disabled) {
  border-color: var(--dim);
  color: var(--text);
}

.mode-btn.mode-active {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(0,229,255,0.08);
}

.mode-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* ── タッチ用コントロールバー */
.touch-control-bar {
  display: none;  /* デフォルト非表示 */
  width: 100%;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: none;
  padding: 8px 10px;
}

@media (pointer: coarse) {
  .control-bar      { display: none; }
  .touch-control-bar { display: flex; }
}

.touch-btn {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  padding: 10px 14px;
  background: var(--surface2);
  border: 1px solid var(--border2);
  color: var(--dim);
  cursor: pointer;
  transition: all 0.18s;
  flex: 1;
  text-transform: uppercase;
}

.touch-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

#btn-touch-place.preview-ready {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(0,229,255,0.08);
  box-shadow: var(--cyan-glow);
}

#btn-touch-cancel.preview-ready {
  border-color: var(--red);
  color: var(--red);
}

/* ステータスバー */
.status-bar {
  width: 100%;
  padding: 9px 14px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-top: none;
  font-size: 0.72rem;
  color: var(--dim);
  letter-spacing: 0.08em;
  text-align: center;
  min-height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.status-bar span { color: var(--text); }

/* ヘルプパネル */
.help-panel {
  width: 100%;
  padding: 10px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: none;
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.help-item {
  font-size: 0.65rem;
  color: var(--dim);
  display: flex;
  align-items: center;
  gap: 6px;
}

.help-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.help-dot.cyan { background: var(--cyan); }
.help-dot.red  { background: var(--red); }
.help-dot.blue { background: #1166cc; }
.help-dot.dark-red { background: #cc1133; }

/* ═══ 結果オーバーレイ ════════════════════════════════════ */

#result-overlay {
  --result-color: var(--cyan);
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.88);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  backdrop-filter: blur(10px);
}

#result-overlay.show { display: flex; }

.result-box {
  background: var(--surface);
  border: 1px solid var(--border2);
  padding: 52px 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
  max-width: 360px;
  width: 90%;
}

.result-box::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--result-color);
  box-shadow: 0 0 16px var(--result-color);
}

.result-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.35em;
  color: var(--dim);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.result-title {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--result-color);
  text-shadow: 0 0 20px var(--result-color);
  margin-bottom: 8px;
}

.result-sub {
  font-size: 0.82rem;
  color: var(--dim);
  letter-spacing: 0.1em;
  margin-bottom: 36px;
}

/* ═══ ユーティリティ ════════════════════════════════════ */

.mt8  { margin-top: 8px; }
.mt12 { margin-top: 12px; }
.mt16 { margin-top: 16px; }
.mt24 { margin-top: 24px; }
.mb0  { margin-bottom: 0 !important; }
.w100 { width: 100%; }
.text-cyan { color: var(--cyan); }
.text-red  { color: var(--red); }
.text-dim  { color: var(--dim); font-size: 0.7rem; }
.text-mono { font-family: var(--font-mono); }

/* ウォールアイコン説明 */
.wall-legend {
  display: flex;
  gap: 6px;
  flex-direction: column;
}

.legend-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.68rem;
  color: var(--dim);
}

.legend-wall-h {
  width: 24px; height: 5px;
  background: #1166cc;
  box-shadow: 0 0 6px rgba(0,100,255,0.6);
  border-radius: 1px;
}

.legend-wall-v {
  width: 5px; height: 24px;
  background: #cc1133;
  box-shadow: 0 0 6px rgba(200,0,50,0.6);
  border-radius: 1px;
}