/* 注册页面样式 */

.auth-wrapper {
    /* 减去导航栏高度 70px，让内容垂直居中 */
    min-height: calc(100vh - 70px); 
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    position: relative;
}

.auth-card {
    background: var(--bg-card);
    width: 100%;
    max-width: 450px;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(147, 51, 234, 0.1);
    overflow: hidden;
    border: 1px solid var(--border-color);
    z-index: 10;
    animation: float 6s ease-in-out infinite;
}

.auth-card-header {
    background: var(--gradient-primary);
    color: var(--text-light);
    padding: 40px 20px;
    text-align: center;
}

.auth-card-header i { 
    font-size: 3rem; 
    margin-bottom: 15px; 
}

.auth-card-header h1 { 
    margin: 0; 
    font-size: 1.8rem; 
    letter-spacing: 1px; 
}

.auth-card-body { 
    padding: 30px; 
}

.form-group { 
    margin-bottom: 20px; 
    text-align: left; 
}

.form-group label { 
    display: block; 
    margin-bottom: 8px; 
    font-weight: 600; 
    color: var(--text-muted); 
}

.input-wrapper { 
    position: relative; 
}

.input-wrapper i {
    position: absolute; 
    left: 15px; 
    top: 50%;
    transform: translateY(-50%); 
    color: var(--color-primary);
}

.input-wrapper input {
    width: 100%; 
    padding: 12px 15px 12px 45px;
    border: 2px solid var(--border-color); 
    border-radius: 12px;
    background: var(--bg-light); 
    transition: 0.3s;
    font-size: 1rem;
}

.input-wrapper input:focus {
    outline: none; 
    border-color: var(--color-primary);
    background: var(--bg-card); 
    box-shadow: 0 0 0 4px rgba(147, 51, 234, 0.1);
}

.captcha-row { 
    display: flex; 
    gap: 10px; 
    align-items: stretch; 
}

.captcha-img-box {
    background: var(--bg-light); 
    border: 2px solid var(--border-color);
    border-radius: 12px; 
    display: flex; 
    align-items: center; 
    padding: 5px; 
    cursor: pointer;
}

.captcha-img-box img { 
    height: 35px; 
    border-radius: 6px; 
}

.alert-box {
    background: var(--color-error-bg); 
    color: var(--color-error-text);
    padding: 12px; 
    border-radius: 10px; 
    margin-bottom: 20px;
    border: 1px solid var(--color-error-border); 
    font-size: 0.9rem;
    display: flex; 
    align-items: center; 
    gap: 8px;
}

.auth-card-footer { 
    text-align: center; 
    padding: 20px; 
    border-top: 1px solid var(--border-color); 
    background: var(--bg-light);
}

.auth-card-footer a { 
    color: var(--color-primary); 
    font-weight: bold; 
}

/* 背景装饰星星 */
.auth-bg-decor { 
    position: absolute; 
    width: 100%; 
    height: 100%; 
    top: 0; 
    left: 0; 
    z-index: 1; 
    pointer-events: none; 
    opacity: 0.6; 
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}

/* 星星位置和动画 */
.star-1 { 
    top: 20%; 
    left: 10%; 
    animation: twinkle 3s ease-in-out infinite; 
}

.star-2 { 
    top: 15%; 
    right: 15%; 
    animation: twinkle 4s ease-in-out infinite 0.5s; 
}

.star-3 { 
    bottom: 20%; 
    left: 20%; 
    animation: twinkle 5s ease-in-out infinite 1s; 
}

@keyframes twinkle {
    0% { opacity: 0.2; transform: scale(0.8); }
    50% { opacity: 0.8; transform: scale(1.1); }
    100% { opacity: 0.2; transform: scale(0.8); }
}