/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 40%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
    animation: bgPulse 8s ease-in-out infinite alternate;
    pointer-events: none;
}

@keyframes bgPulse {
    0% { transform: scale(1) rotate(0deg); }
    100% { transform: scale(1.1) rotate(5deg); }
}

/* 登录容器 */
.login-wrapper {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 440px;
    padding: 20px;
}

.login-box {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4),
                0 0 0 1px rgba(255, 255, 255, 0.05) inset;
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 头部 */
.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.logo {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 28px;
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
}

.login-header h1 {
    color: #fff;
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 6px;
    letter-spacing: 0.5px;
}

.login-header p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

/* 警告提示 */
.alert {
    padding: 12px 16px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.alert-error {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

/* 表单 */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    color: rgba(255, 255, 255, 0.75);
    font-size: 14px;
    font-weight: 500;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 14px;
    font-size: 16px;
    pointer-events: none;
    z-index: 1;
}

.input-wrapper input {
    width: 100%;
    padding: 13px 50px 13px 14px;
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    color: #fff;
    font-size: 15px;
    transition: all 0.3s ease;
    outline: none;
}

.input-wrapper input::placeholder {
    color: rgba(255, 255, 255, 0.3);
}

.input-wrapper input:focus {
    background: rgba(255, 255, 255, 0.1);
    border-color: #6366f1;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.toggle-password {
    position: absolute;
    right: 10px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 12px;
    padding: 4px 6px;
    color: rgba(255, 255, 255, 0.5);
    transition: color 0.2s;
    white-space: nowrap;
}

.toggle-password:hover {
    color: rgba(255, 255, 255, 0.9);
}

/* 表单选项 */
.form-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: -4px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: #6366f1;
    cursor: pointer;
}

.forgot-link {
    color: #818cf8;
    font-size: 14px;
    text-decoration: none;
    transition: color 0.2s;
}

.forgot-link:hover {
    color: #a5b4fc;
    text-decoration: underline;
}

/* 登录按钮 */
.btn-login {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 2px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
    margin-top: 4px;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
    background: linear-gradient(135deg, #818cf8, #a78bfa);
}

.btn-login:active {
    transform: translateY(0);
}

/* 页脚 */
.login-footer {
    text-align: center;
    margin-top: 28px;
    color: rgba(255, 255, 255, 0.3);
    font-size: 12px;
}

/* 响应式 */
@media (max-width: 480px) {
    .login-box {
        padding: 30px 24px;
    }

    .login-header h1 {
        font-size: 18px;
    }
}