/* Login Page Styles */
:root {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --secondary-color: #6b7280;
    --success-color: #10b981;
    --error-color: #ef4444;
    --background-color: #f9fafb;
    --card-background: #ffffff;
    --border-color: #e5e7eb;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --border-radius: 0.75rem;
    --transition: all 0.3s ease-in-out;
    --user-primary: #3b82f6;
    --user-primary-hover: #2563eb;
    --user-gradient-1: #8b5cf6;
    --user-gradient-2: #3b82f6;
}

/* Animations */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: var(--background-color);
    padding: 1rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.login-card {
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    padding: 2.5rem;
    width: 100%;
    max-width: 420px;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
    z-index: 10;
    overflow: hidden;
}

.login-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-2px);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-logo {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 4px rgba(59, 130, 246, 0.1);
}

.login-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    letter-spacing: -0.025em;
}

.login-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.login-form {
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 10;
}

.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.forgot-password-link {
    font-size: 0.75rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.forgot-password-link:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

.input-wrapper {
    position: relative;
    width: 90%;
}

.input-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--secondary-color);
    font-size: 0.875rem;
    z-index: 5;
}

.form-control {
    padding-left: 2.75rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    letter-spacing: 0.025em;
}

.form-control {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    color: var(--text-primary);
    background-color: var(--card-background);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    transform: translateY(-1px);
}

.login-btn {
    width: 100%;
    padding: 0.875rem 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: var(--shadow-md);
    letter-spacing: 0.025em;
    gap: 0.5rem;
    text-decoration: none;
}

.login-btn:hover {
    background-color: var(--primary-hover);
    box-shadow: var(--shadow-lg);
    transform: translateY(-1px);
}

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

.btn-icon {
    font-size: 1rem;
    opacity: 0.8;
    transition: var(--transition);
}

.login-btn:hover .btn-icon {
    transform: translateX(3px);
    opacity: 1;
}

.form-options {
    margin-bottom: 1.5rem;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.remember-me input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    accent-color: var(--primary-color);
    cursor: pointer;
}

.remember-me-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.login-footer {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1.5rem;
    align-items: stretch;
}

.login-footer > * {
    width: 100%;
}

/* 添加按钮美化效果 */
.login-btn {
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.login-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.login-btn:hover::after {
    width: 300px;
    height: 300px;
}

.login-btn > span {
    position: relative;
    z-index: 1;
}

.register-link,
.admin-login-link {
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.register-link a,
.admin-login-link a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    position: relative;
}

.register-link a::after,
.admin-login-link a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -2px;
    left: 0;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.register-link a:hover::after,
.admin-login-link a:hover::after {
    width: 100%;
}

.register-link a:hover,
.admin-login-link a:hover {
    color: var(--primary-hover);
}

/* Admin Login Specific Styles */
.admin-login-container {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.admin-login-card {
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

.admin-login-title {
    color: #667eea;
}

.admin-login-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.admin-login-btn:hover {
    background: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
    box-shadow: 0 15px 30px rgba(102, 126, 234, 0.4);
}

/* User Login Specific Styles */
.user-login-container {
    background: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);
    position: relative;
}

.user-login-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 10% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 20%),
        radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.15) 0%, transparent 30%);
    animation: backgroundPulse 6s ease-in-out infinite alternate;
}

@keyframes backgroundPulse {
    from {
        opacity: 0.6;
    }
    to {
        opacity: 1;
    }
}

.user-login-card {
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

/* 装饰元素 */
.login-decoration {
    position: absolute;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    animation: float 6s ease-in-out infinite;
}

.login-decoration-1 {
    width: 150px;
    height: 150px;
    top: -75px;
    right: -75px;
    animation-delay: 0s;
}

.login-decoration-2 {
    width: 100px;
    height: 100px;
    bottom: -50px;
    left: -50px;
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    50% {
        transform: translate(-10px, 10px) rotate(180deg);
    }
}

.user-login-title {
    color: #3b82f6;
    position: relative;
    z-index: 10;
}

.user-login-btn {
    background: linear-gradient(135deg, var(--user-gradient-1), var(--user-gradient-2));
    box-shadow: 0 10px 25px rgba(59, 130, 246, 0.3);
    position: relative;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.user-login-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition);
}

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

.user-login-btn:hover {
    background: linear-gradient(135deg, #7c3aed, #2563eb);
    box-shadow: 0 15px 30px rgba(59, 130, 246, 0.4);
    transform: translateY(-2px);
}

/* 确保链接按钮和提交按钮样式完全一致 */
.login-btn[type="submit"],
.login-btn[href] {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 0.025em;
    color: white;
    text-decoration: none;
    width: 100%;
    box-sizing: border-box;
}

/* 确保登录按钮图标样式一致 */
.login-btn .btn-icon {
    font-size: 1rem;
    opacity: 0.8;
    transition: var(--transition);
}

.login-btn:hover .btn-icon {
    transform: translateX(3px);
    opacity: 1;
}

/* Responsive Design */
@media (max-width: 480px) {
    .login-card {
        padding: 1.75rem;
    }
    
    .login-logo {
        font-size: 1.75rem;
    }
    
    .login-title {
        font-size: 1.5rem;
    }
    
    .login-footer {
        gap: 0.5rem;
    }
}

/* Loading Animation (for future use) */
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.loading {
    animation: spin 1s linear infinite;
}