.ac-game-settings {
    width: 100%;
    height: 100%;
    background-image: url("/static/image/menu/background.gif");
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    user-select: none;
    will-change: scroll-position;
    contain: layout style paint;
}

.ac-game-settings-login {
    height: 38vh;
    width: 17vw;
    min-width: 280px;
    max-width: 400px;
    position: relative;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: linear-gradient(135deg, rgba(25, 25, 35, 0.8), rgba(35, 35, 45, 0.7));
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(12px);
    overflow: hidden;
    will-change: transform;
    contain: layout style paint;
}

.ac-game-settings-register {
    height: 45vh;
    width: 17vw;
    min-width: 280px;
    max-width: 400px;
    position: relative;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: linear-gradient(135deg, rgba(25, 25, 35, 0.8), rgba(35, 35, 45, 0.7));
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(12px);
    overflow: hidden;
    will-change: transform;
    contain: layout style paint;
}

.ac-game-settings-title {
    color: #e4e4e7;
    font-size: clamp(18px, 3vh, 32px);
    font-weight: 400;
    font-family: 'Inter', 'Roboto', sans-serif;
    text-align: center;
    padding-top: 2vh;
    text-transform: uppercase;
    letter-spacing: 0.15vw;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.ac-game-settings-username,
.ac-game-settings-password,
.ac-game-settings-submit {
    display: block;
    height: 7vh;
    min-height: 40px;
    margin: 0 1vw;
}

.ac-game-settings-item {
    width: 100%;
    height: 100%;
    position: relative;
}

.ac-game-settings-item > input {
    width: 90%;
    line-height: 3vh;
    min-height: 32px;
    position: relative;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: #e4e4e7;
    padding: 0 1vw;
    font-family: 'Inter', 'Roboto', sans-serif;
    font-size: clamp(12px, 1.5vh, 16px);
    transition: all 0.2s ease;
    backdrop-filter: blur(8px);
    will-change: transform, box-shadow;
}

.ac-game-settings-item > input:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 16px rgba(243, 156, 18, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.ac-game-settings-item > input::placeholder {
    color: rgba(228, 228, 231, 0.5);
}

.ac-game-settings-item > button {
    color: #e4e4e7;
    width: 90%;
    line-height: 3vh;
    min-height: 36px;
    position: relative;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.8), rgba(41, 128, 185, 0.7));
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    font-family: 'Inter', 'Roboto', sans-serif;
    font-size: clamp(12px, 1.4vh, 16px);
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.1vw;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
    transition: all 0.2s ease;
    overflow: hidden;
    will-change: transform, box-shadow;
    backface-visibility: hidden;
}

.ac-game-settings-item > button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg,
    transparent,
    rgba(255, 255, 255, 0.1),
    rgba(255, 255, 255, 0.2),
    rgba(255, 255, 255, 0.1),
    transparent);
    transition: left 0.5s ease;
    will-change: transform;
}

.ac-game-settings-item > button:hover {
    transform: translate(-50%, -50%) translateY(-2px);
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.9), rgba(41, 128, 185, 0.8));
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5),
    0 0 24px rgba(52, 152, 219, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.ac-game-settings-item > button:hover::before {
    left: 100%;
}

.ac-game-settings-item > button:active {
    transform: translate(-50%, -50%);
    background: linear-gradient(135deg, rgba(41, 128, 185, 0.8), rgba(52, 152, 219, 0.7));
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.5),
    inset 0 2px 4px rgba(0, 0, 0, 0.3);
}

.ac-game-settings-error-message {
    color: #ef4444;
    font-size: clamp(10px, 1vh, 14px);
    font-family: 'Inter', 'Roboto', sans-serif;
    display: inline;
    float: left;
    padding-left: 1.85vw;
    padding-top: 0.35vh;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
    font-weight: bold;
}

.ac-game-settings-option {
    color: #e4e4e7;
    font-size: clamp(12px, 1.7vh, 18px);
    font-family: 'Inter', 'Roboto', sans-serif;
    display: inline;
    float: right;
    padding-right: 2.0vw;
    cursor: pointer;
    transition: all 0.2s ease;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.ac-game-settings-option:hover {
    color: #ffffff;
    text-decoration: underline;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8);
}

.ac-game-settings-acwing,
.ac-game-settings-github,
.ac-game-settings-gitee {
    position: absolute;
    bottom: 1.5vh;
    height: 5vh;
    min-height: 30px;
    width: 33.33%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.ac-game-settings-acwing {
    left: 0;
}

.ac-game-settings-github {
    left: 33.33%;
}

.ac-game-settings-gitee {
    left: 66.66%;
}

.ac-game-settings-acwing > img,
.ac-game-settings-github > img,
.ac-game-settings-gitee > img {
    width: 3.5vh;
    height: 3.5vh;
    min-width: 30px;
    min-height: 30px;
    max-width: 35px;
    max-height: 35px;
    object-fit: contain;
    cursor: pointer;
    transition: all 0.2s ease;
    filter: brightness(0.9);
    will-change: transform, filter;
    backface-visibility: hidden;
}

.ac-game-settings-github > img {
    filter: brightness(0.9) invert(1);
}

.ac-game-settings-acwing > img:hover,
.ac-game-settings-gitee > img:hover {
    transform: scale(1.05);
    filter: brightness(1.1) drop-shadow(0 4px 8px rgba(0, 0, 0, 0.5));
}

.ac-game-settings-github > img:hover {
    transform: scale(1.05);
    filter: brightness(1.1) invert(1) drop-shadow(0 4px 8px rgba(0, 0, 0, 0.5));
}