:root {
    --primary-color: #2ecc71;     /* 柔和的绿色 */
    --secondary-color: #27ae60;   /* 深绿色 */
    --accent-color: #3498db;      /* 点缀蓝色 */
    --background-color: #f0f4f0;  /* 淡雅绿灰色 */
    --text-color: #2c3e50;        /* 深灰色文字 */
    --card-background: white;
}

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

body {
    font-family: 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg,
    rgba(46, 204, 113, 0.03),
    rgba(52, 152, 219, 0.03));
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

.game-wrapper {
    position: relative;
    width: 100%;
    max-width: 480px;
    z-index: 10;
}

.game-container {
    padding: 20px;
}

.glass-morphism-card {
    background: rgba(255, 255, 255, 0.85);
    border-radius: 20px;
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow:
            0 15px 35px rgba(0, 0, 0, 0.05),
            0 5px 15px rgba(0, 0, 0, 0.05);
    padding: 40px 30px;
    position: relative;
    overflow: hidden;
}

.header {
    text-align: center;
    margin-bottom: 30px;
}

.header h1 {
    font-size: 28px;
    font-weight: 900;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 1px;
    transition: transform 0.3s ease;
}

.header h1:hover {
    transform: scale(1.05);
}

.register-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.register-inputs {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-group {
    position: relative;
}

.input-group i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--secondary-color);
    opacity: 0.7;
}

.input-group input,
.input-group select {
    width: 100%;
    padding: 15px 15px 15px 45px;
    border: 1px solid rgba(46, 204, 113, 0.2);
    border-radius: 10px;
    background-color: rgba(46, 204, 113, 0.05);
    color: var(--text-color);
    font-size: 16px;
    transition: all 0.3s ease;
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.15);
}

.register-buttons {
    display: flex;
    gap: 15px;
}

.primary-btn,
.secondary-btn {
    flex: 1;
    padding: 15px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.primary-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 10px 20px rgba(46, 204, 113, 0.3);
}

.secondary-btn {
    background: rgba(46, 204, 113, 0.1);
    color: var(--secondary-color);
    border: 1px solid rgba(46, 204, 113, 0.3);
}

.primary-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 25px rgba(46, 204, 113, 0.4);
}

.secondary-btn:hover {
    background: rgba(46, 204, 113, 0.15);
}

@media screen and (max-width: 480px) {
    .game-wrapper {
        width: 95%;
    }

    .glass-morphism-card {
        padding: 30px 20px;
    }

    .header h1 {
        font-size: 24px;
    }

    .register-buttons {
        flex-direction: column;
    }
}