/* 现代化登录页面样式 - 参考 CuPlayer 并优化 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary-color: #667eea;
    --primary-hover: #5a67d8;
    --secondary-color: #764ba2;
    --success-color: #48bb78;
    --error-color: #f56565;
    --warning-color: #ed8936;
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --text-light: #a0aec0;
    --bg-primary: #f7fafc;
    --bg-white: #ffffff;
    --bg-glass: rgba(255, 255, 255, 0.95);
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.6;
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
    position: relative;
    z-index: 10;
}

.login-card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 24px;
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    transform: translateY(30px);
    opacity: 0;
    transition: var(--transition);
    animation: slideUp 0.8s ease-out forwards;
}

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

.login-card.animate-in {
    transform: translateY(0);
    opacity: 1;
}

.login-header {
    padding: 40px 30px 20px;
    text-align: center;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo-container h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.logo-container p {
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 400;
}

.logo-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.logo-icon::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: rotate(45deg);
    animation: shine 3s ease-in-out infinite;
}

@keyframes shine {
    0%, 100% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    50% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

.logo-icon i {
    font-size: 32px;
    color: white;
    z-index: 2;
    position: relative;
}

.login-body {
    padding: 30px;
}

.alert {
    padding: 16px 20px;
    border-radius: 12px;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    font-weight: 500;
    animation: fadeInDown 0.5s ease-out;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert-error {
    background: rgba(245, 101, 101, 0.1);
    color: var(--error-color);
    border: 1px solid rgba(245, 101, 101, 0.2);
}

.alert-success {
    background: rgba(72, 187, 120, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(72, 187, 120, 0.2);
}

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

.input-wrapper {
    position: relative;
    overflow: hidden;
}

.input-wrapper input {
    width: 100%;
    padding: 16px 20px 16px 50px;
    background: rgba(255, 255, 255, 0.9);
    border: 2px solid transparent;
    border-radius: 16px;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.input-wrapper input:focus {
    outline: none;
    background: var(--bg-white);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.input-wrapper input::placeholder {
    color: transparent;
}

.input-wrapper label {
    position: absolute;
    left: 50px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    font-size: 16px;
    font-weight: 500;
    pointer-events: none;
    transition: var(--transition);
}

.input-wrapper.focused label,
.input-wrapper input:focus + label {
    top: 8px;
    font-size: 12px;
    color: var(--primary-color);
    font-weight: 600;
}

.input-icon {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    font-size: 18px;
    transition: var(--transition);
    z-index: 2;
}

.input-wrapper.focused .input-icon,
.input-wrapper input:focus ~ .input-icon {
    color: var(--primary-color);
}

.password-toggle {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 18px;
    cursor: pointer;
    padding: 4px;
    border-radius: 8px;
    transition: var(--transition);
}

.password-toggle:hover {
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
}

.checkbox-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
}

.checkbox-wrapper input[type="checkbox"] {
    display: none;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    user-select: none;
}

.checkbox-custom {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-white);
    position: relative;
    transition: var(--transition);
}

.checkbox-wrapper input[type="checkbox"]:checked + .checkbox-label .checkbox-custom {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-wrapper input[type="checkbox"]:checked + .checkbox-label .checkbox-custom::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
    font-weight: bold;
}

.login-btn {
    width: 100%;
    padding: 18px 24px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border: none;
    border-radius: 16px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    margin-top: 8px;
}

.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: left 0.6s;
}

.login-btn:hover {
    background: linear-gradient(135deg, var(--primary-hover) 0%, var(--secondary-color) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.login-btn.loading {
    pointer-events: none;
    opacity: 0.8;
}

.btn-icon {
    font-size: 16px;
    transition: transform 0.3s ease;
}

.login-btn:hover .btn-icon {
    transform: translateX(4px);
}

.login-footer {
    padding: 24px 30px;
    background: rgba(255, 255, 255, 0.05);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-links {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 16px;
}

.footer-links a {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 8px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
    transform: translateY(-1px);
}

.footer-info {
    text-align: center;
}

.footer-info p {
    color: var(--text-light);
    font-size: 13px;
}

/* 响应式设计 */
@media (max-width: 480px) {
    .login-container {
        padding: 15px;
        max-width: 100%;
    }
    
    .login-card {
        border-radius: 20px;
    }
    
    .login-header {
        padding: 30px 25px 20px;
    }
    
    .logo-container h1 {
        font-size: 24px;
    }
    
    .logo-icon {
        width: 60px;
        height: 60px;
        margin-bottom: 16px;
    }
    
    .logo-icon i {
        font-size: 28px;
    }
    
    .login-body {
        padding: 25px;
    }
    
    .login-footer {
        padding: 20px 25px;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 12px;
    }
    
    .footer-links a {
        justify-content: center;
    }
}

@media (max-width: 360px) {
    .login-container {
        padding: 10px;
    }
    
    .login-header {
        padding: 25px 20px 15px;
    }
    
    .login-body {
        padding: 20px;
    }
    
    .input-wrapper input {
        padding: 14px 18px 14px 45px;
        font-size: 15px;
    }
    
    .input-wrapper label {
        left: 45px;
        font-size: 15px;
    }
    
    .input-icon {
        left: 16px;
        font-size: 16px;
    }
    
    .login-btn {
        padding: 16px 20px;
        font-size: 15px;
    }
}

/* 暗色模式兼容 */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #f7fafc;
        --text-secondary: #cbd5e0;
        --text-light: #a0aec0;
        --bg-glass: rgba(26, 32, 44, 0.95);
        --bg-white: rgba(45, 55, 72, 0.9);
    }
}

/* 高对比度模式兼容 */
@media (prefers-contrast: high) {
    .input-wrapper input {
        border: 2px solid var(--text-secondary);
    }
    
    .input-wrapper input:focus {
        border: 2px solid var(--primary-color);
    }
    
    .alert {
        border-width: 2px;
    }
}