* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    padding: 24px 12px;
    color: #ffffff;
    font-family: Arial, "Yu Gothic", sans-serif;
    background:
        radial-gradient(circle at top, #283b70 0%, #111827 45%, #050816 100%);
}

.game-container {
    width: min(100%, 620px);
    margin: 0 auto;
    text-align: center;
}

h1 {
    margin: 0 0 22px;
    color: #ff91c8;
    font-size: 32px;
    text-shadow: 0 0 18px rgba(255, 105, 180, 0.5);
}

.game-layout {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 24px;
}

#game-board {
    display: block;
    width: 300px;
    height: 600px;
    background: #080b18;
    border: 4px solid #ff75b5;
    border-radius: 8px;
    box-shadow:
        0 0 0 4px rgba(255, 117, 181, 0.15),
        0 0 28px rgba(255, 117, 181, 0.35);
}

.game-info {
    width: 180px;
    padding: 20px;
    color: #222222;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 14px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

.game-info p {
    margin: 5px 0;
    font-weight: bold;
}

#score,
#lines {
    margin-bottom: 20px;
    color: #d63384;
    font-size: 30px;
    font-weight: bold;
}

button {
    min-height: 46px;
    padding: 10px 16px;
    color: #ffffff;
    font-size: 16px;
    font-weight: bold;
    background: #d63384;
    border: none;
    border-radius: 9px;
    cursor: pointer;
    touch-action: manipulation;
}

button:hover {
    background: #b8256d;
}

button:active {
    transform: scale(0.96);
}

.game-info button {
    width: 100%;
    margin-top: 10px;
}

.mobile-controls {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    width: min(100%, 500px);
    margin: 22px auto 0;
}

.mobile-controls button {
    font-size: 18px;
}

.instructions {
    margin-top: 18px;
    color: #dbeafe;
    line-height: 1.7;
}

@media (max-width: 600px) {
    body {
        padding: 12px 8px;
    }

    h1 {
        margin-bottom: 12px;
        font-size: 24px;
    }

    .game-layout {
        gap: 10px;
    }

    #game-board {
        width: 220px;
        height: 440px;
    }

    .game-info {
        width: 105px;
        padding: 10px 7px;
    }

    .game-info p {
        font-size: 13px;
    }

    #score,
    #lines {
        margin-bottom: 10px;
        font-size: 22px;
    }

    .game-info button {
        min-height: 42px;
        padding: 6px;
        font-size: 13px;
    }

    .mobile-controls {
        max-width: 335px;
    }
}

.board-wrapper {
    position: relative;
    width: 300px;
    height: 600px;
}

.game-over-panel {
    position: absolute;
    inset: 0;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
    color: #ffffff;
    text-align: center;
    background: rgba(5, 8, 22, 0.94);
    border: none;
    border-radius: 8px;
    box-shadow: none;
}

.game-over-panel[hidden] {
    display: none !important;
}

.game-over-panel h2 {
    margin: 0 0 16px;
    color: #ff91c8;
    font-size: 32px;
}

.game-over-panel p {
    margin: 0 0 20px;
    font-size: 18px;
}

.game-over-panel button {
    width: 220px;
    margin: 7px 0;
}

#back-button {
    color: #d63384;
    background: #ffffff;
}

@media (max-width: 600px) {
    .board-wrapper {
        width: 220px;
        height: 440px;
    }

    .game-over-panel {
        padding: 12px;
    }

    .game-over-panel h2 {
        font-size: 24px;
    }

    .game-over-panel button {
        width: 180px;
        font-size: 14px;
    }
}

.game-over-panel {
    position: absolute;
    inset: 12px;
    z-index: 20;
    padding: 18px;
    overflow-y: auto;
    border-radius: 12px;
    color: #fff;
    background: rgba(5, 10, 30, 0.94);
}

.game-over-panel[hidden] {
    display: none;
}

.game-over-actions {
    text-align: center;
}

.game-over-actions h2 {
    margin: 0 0 8px;
    color: #ff70b7;
}

.game-over-actions button {
    margin: 5px;
}

.ranking-box {
    max-width: 320px;
    margin: 16px auto 0;
    padding: 12px 16px;
    color: #222;
    background: rgba(255, 255, 255, 0.96);
    border-radius: 12px;
}

.ranking-box h3 {
    margin: 0 0 10px;
    text-align: center;
    color: #d52f83;
}

.ranking-box ol {
    margin: 0;
    padding-left: 30px;
}

.ranking-box li {
    display: list-item;
    padding: 5px 2px;
    border-bottom: 1px solid #ddd;
}

.ranking-box li span {
    margin-left: 5px;
}

.ranking-box li strong {
    float: right;
    color: #d52f83;
}
.game-over-panel {
    top: 6px;
    bottom: 6px;
    padding: 12px;
    overflow-y: auto;
}

.game-over-actions h2 {
    margin: 0 0 6px;
}

.ranking-box {
    margin-top: 10px;
    padding: 10px 12px;
}

.ranking-box li {
    padding: 3px 2px;
    font-size: 14px;
}
/* ゲームオーバー画面を上端へ寄せる */
.game-over-panel {
    top: 2px;
    bottom: 2px;
    padding: 4px 10px 8px;
    overflow-y: auto;

    /* 中央配置を解除して上端から表示 */
    justify-content: flex-start;
}

/* ゲームオーバー部分の上の空白を縮める */
.game-over-actions {
    margin-top: 2px;
}

.game-over-actions h2 {
    margin: 0 0 4px;
}

.game-over-actions p {
    margin: 2px 0 6px;
}

/* ボタン間の余白も少し圧縮 */
.game-over-actions button {
    margin-top: 4px;
}

/* ランキングをすぐ下に配置 */
.ranking-box {
    margin-top: 6px;
    padding: 8px 10px;
}

.ranking-box h3 {
    margin: 0 0 5px;
}

.ranking-box li {
    padding: 2px;
    font-size: 13px;
    line-height: 1.2;
}

h1 {
    position: relative;
    left: -3em;
}
#player-name {
    display: block;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.password-field {
  position: relative;
}

.password-field input {
  width: 100%;
  padding-right: 42px;
  box-sizing: border-box;
}

.password-toggle {
  position: absolute;
  top: 50%;
  right: 8px;
  width: auto;
  padding: 4px;
  border: 0;
  background: transparent;
  transform: translateY(-50%);
  cursor: pointer;
}

/* 登録・ログイン・パスワード変更 共通画面 */
.auth-page {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  box-sizing: border-box;
  color: #ffffff;
  background:
    radial-gradient(circle at top, #24365f 0%, #111b35 45%, #080e1d 100%);
  font-family: Arial, "Noto Sans JP", sans-serif;
}

.auth-card {
  width: min(100%, 380px);
  padding: 30px;
  box-sizing: border-box;
  border: 2px solid #ff6eb7;
  border-radius: 16px;
  background: rgba(8, 14, 29, 0.94);
  box-shadow: 0 0 20px rgba(255, 74, 165, 0.4);
}

.auth-card h1,
.auth-card h2 {
  position: static;
  margin: 0 0 24px;
  color: #ff78bd;
  text-align: center;
}

.auth-card label {
  display: block;
  margin: 14px 0 6px;
  font-size: 14px;
}

.auth-card input {
  display: block;
  width: 100%;
  padding: 11px 12px;
  box-sizing: border-box;
  border: 1px solid #77819a;
  border-radius: 7px;
  font-size: 16px;
  background: #ffffff;
  color: #111111;
}

.auth-card button {
  width: 100%;
  margin-top: 22px;
  padding: 12px;
  border: 0;
  border-radius: 8px;
  color: #ffffff;
  background: #d92e84;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
}

.auth-card button:hover {
  background: #ed4799;
}

.auth-card a {
  display: block;
  margin-top: 18px;
  color: #ff91c8;
  text-align: center;
}

.auth-card .error,
.auth-card .message {
  margin-bottom: 16px;
  padding: 10px;
  border-radius: 6px;
  background: rgba(255, 90, 130, 0.16);
  color: #ffb4d4;
}

.qr-guide {
    margin-top: 18px;
    padding: 14px 10px;
    background: rgba(255, 255, 255, 0.96);
    border-radius: 12px;
    text-align: center;
}

.qr-title {
    margin: 0 0 10px;
    color: #222;
    font-size: 14px;
    font-weight: bold;
}

.qr-image {
    display: block;
    width: 130px;
    max-width: 100%;
    height: auto;
    margin: 0 auto;
}

.qr-text {
    margin: 9px 0 0;
    color: #555;
    font-size: 12px;
    line-height: 1.5;
}

@media (max-width: 700px) {
    .qr-guide {
        display: none;
    }
}

.game-layout {
    align-items: flex-start;
}

.qr-guide {
    width: 170px;
    margin-top: 18px;
    padding: 14px 10px;
    background: rgba(255, 255, 255, 0.96);
    border-radius: 12px;
    text-align: center;
}
.game-layout {
    align-items: flex-start;
}

.qr-guide {
    width: 170px;
    margin-top: 18px;
    padding: 14px 10px;
    background: rgba(255, 255, 255, 0.96);
    border-radius: 12px;
    text-align: center;
}