* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: #1a1a1a;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    height: 100dvh;
    font-family: "Yuji Syuku", "Hiragino Mincho ProN", "Yu Mincho", serif;
    overflow: hidden;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    -webkit-user-select: none;
}

/* タイトル画面 */
#title-screen {
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    background: #f5f0e1;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
}

#title-content {
    text-align: center;
    max-width: 400px;
    padding: 20px;
}

#title-content h1 {
    font-size: 36px;
    color: #2c1810;
    margin-bottom: 16px;
    letter-spacing: 4px;
}

#title-image-container {
    width: 100%;
    max-width: 360px;
    margin: 0 auto 16px;
    border: 3px solid #2c1810;
}

#title-image {
    width: 100%;
    display: block;
}

#subtitle {
    font-size: 18px;
    color: #5c4033;
    margin-bottom: 24px;
}

#start-button,
#retry-button,
#restart-button {
    font-family: inherit;
    font-size: 22px;
    padding: 14px 40px;
    background: #2c1810;
    color: #f5f0e1;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    letter-spacing: 2px;
}

#copyright {
    font-size: 12px;
    color: #8a7a6a;
    margin-top: 16px;
}

#start-button:active,
#retry-button:active,
#restart-button:active {
    background: #5c4033;
}

/* ゲーム画面 */
#game-container {
    position: relative;
    width: 100%;
    max-width: 480px;
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
    background: #e8e0d0;
}

#hud {
    position: absolute;
    top: 0; left: 0; right: 0;
    display: flex;
    justify-content: space-between;
    padding: 8px 12px;
    font-size: 16px;
    color: #2c1810;
    background: rgba(245, 240, 225, 0.85);
    z-index: 10;
}

#game-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* クリア画面 */
#clear-screen {
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    background: #f5f0e1;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 101;
}

#clear-content {
    text-align: center;
    max-width: 400px;
    padding: 20px;
}

#clear-content h1 {
    font-size: 30px;
    color: #2c1810;
    margin-bottom: 16px;
}

#clear-image-container {
    width: 100%;
    max-width: 360px;
    margin: 0 auto 16px;
    border: 3px solid #2c1810;
}

#clear-image {
    width: 100%;
    display: block;
}

#clear-content p {
    font-size: 18px;
    color: #5c4033;
    margin-bottom: 20px;
    line-height: 1.6;
}

/* ゲームオーバー画面 */
#gameover-screen {
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    background: rgba(30, 20, 10, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 101;
}

#gameover-content {
    text-align: center;
    color: #f5f0e1;
    padding: 20px;
}

#gameover-content h1 {
    font-size: 28px;
    margin-bottom: 16px;
}

#gameover-content p {
    font-size: 18px;
    margin-bottom: 16px;
    line-height: 1.6;
}