/* 登录页面专用样式 */
.login-page {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.login-page::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: pulse 15s ease-in-out infinite;
}

.login-page::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -30%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
    animation: pulse 20s ease-in-out infinite reverse;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.login-container {
    width: 100%;
    max-width: 440px;
    position: relative;
    z-index: 1;
}

.login-form-wrapper {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    padding: 50px 40px;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(255, 255, 255, 0.2);
    animation: slideUp 0.5s ease-out;
}

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

.login-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
    text-align: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.login-icon-wrapper {
    text-align: center;
    margin-bottom: 10px;
}

.login-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.35);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    animation: iconFloat 3s ease-in-out infinite;
}

.login-icon:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 12px 32px rgba(102, 126, 234, 0.45);
}

.login-icon svg {
    color: white;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
}

@keyframes iconFloat {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-8px);
    }
}

.login-subtitle {
    color: #6b7280;
    margin-bottom: 35px;
    text-align: center;
    font-size: 15px;
    font-weight: 400;
}

.login-form .form-group {
    margin-bottom: 24px;
    position: relative;
}

.login-form label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: #374151;
    font-size: 14px;
    letter-spacing: 0.2px;
}

.login-form input {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid #e5e7eb;
    border-radius: 10px;
    font-size: 15px;
    transition: all 0.3s ease;
    background: #f9fafb;
    color: #111827;
    font-weight: 400;
}

.login-form input::placeholder {
    color: #9ca3af;
    font-weight: 400;
}

.login-form input:focus {
    border-color: #667eea;
    outline: none;
    background: #ffffff;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
    transform: translateY(-1px);
}

.login-form input:hover:not(:focus) {
    border-color: #d1d5db;
    background: #ffffff;
}

.login-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    margin-top: 8px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    letter-spacing: 0.3px;
    position: relative;
    overflow: hidden;
}

.login-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s;
}

.login-btn:hover::before {
    left: 100%;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

.login-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(102, 126, 234, 0.4);
}

.error-message {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #991b1b;
    padding: 14px 18px;
    border-radius: 10px;
    margin-bottom: 24px;
    font-size: 14px;
    font-weight: 500;
    border: 1px solid #fca5a5;
    animation: shake 0.5s ease-in-out;
    box-shadow: 0 2px 8px rgba(220, 38, 38, 0.1);
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

/* 响应式设计 */
@media (max-width: 480px) {
    .login-form-wrapper {
        padding: 40px 30px;
        border-radius: 16px;
    }
    
    .login-title {
        font-size: 28px;
    }
    
    .login-subtitle {
        font-size: 14px;
    }
    
    .login-form input {
        padding: 12px 14px;
        font-size: 14px;
    }
    
    .login-btn {
        padding: 14px;
        font-size: 15px;
    }
}

/* 输入框图标效果 */
.login-form .form-group::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: width 0.3s ease;
}

.login-form .form-group:focus-within::after {
    width: 100%;
}

/* 添加一些装饰性元素 */
.login-form-wrapper::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.login-form-wrapper:hover::before {
    opacity: 0.1;
}