/**
 * 网盘资源搜索系统 - 认证页面样式
 * Requirements: 7.1-7.4, 15.1-15.10
 * 登录/注册页面冷色调设计
 */

/* ========================================
   Auth Page Layout
   ======================================== */
.auth-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: linear-gradient(135deg, #e6f7ff 0%, #f0f5ff 50%, #e6fffb 100%);
}

.auth-main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-md);
}

.auth-container {
    width: 100%;
    max-width: 420px;
}

/* ========================================
   Auth Header
   ======================================== */
.auth-header {
    padding: var(--spacing-md) 0;
    background-color: transparent;
}

.auth-header .container {
    display: flex;
    justify-content: center;
}

.auth-header .logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.auth-header .logo:hover {
    color: var(--primary-hover);
}

.auth-header .logo-icon {
    font-size: 28px;
}

.auth-header .logo-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   Auth Card
   ======================================== */
.auth-card {
    background-color: var(--bg-base);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.auth-card-header {
    padding: var(--spacing-xl) var(--spacing-xl) var(--spacing-md);
    text-align: center;
}

.auth-title {
    font-size: var(--font-size-xxl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 var(--spacing-xs);
}

.auth-subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin: 0;
}

.auth-card-body {
    padding: var(--spacing-md) var(--spacing-xl) var(--spacing-xl);
}

.auth-card-footer {
    padding: var(--spacing-md) var(--spacing-xl);
    background-color: var(--gray-2);
    border-top: 1px solid var(--border-light);
    text-align: center;
}

.auth-footer-text {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin: 0;
}

.auth-link {
    color: var(--primary-color);
    font-weight: 500;
    text-decoration: none;
}

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

/* ========================================
   Auth Form
   ======================================== */
.auth-form .form-group {
    margin-bottom: var(--spacing-md);
}

.auth-form .form-label {
    margin-bottom: var(--spacing-xs);
}

.auth-form .input-group {
    position: relative;
}

.auth-form .input-group .input-group-text {
    min-width: 44px;
    justify-content: center;
    background-color: var(--gray-2);
    border-color: var(--border-color);
}

.auth-form .input-group .form-control {
    border-left: none;
}

.auth-form .input-group .form-control:focus {
    border-color: var(--primary-color);
}

.auth-form .input-group .form-control:focus + .input-group-text,
.auth-form .input-group:focus-within .input-group-text:first-child {
    border-color: var(--primary-color);
}

.auth-form .password-toggle {
    cursor: pointer;
    border-left: none;
    background-color: var(--gray-2);
    transition: background-color var(--transition-fast);
}

.auth-form .password-toggle:hover {
    background-color: var(--gray-3);
}

.auth-form .form-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.auth-form .form-check {
    margin-bottom: 0;
}

.auth-form .forgot-link {
    font-size: var(--font-size-sm);
    color: var(--primary-color);
    text-decoration: none;
}

.auth-form .forgot-link:hover {
    text-decoration: underline;
}

/* ========================================
   Auth Error Alert
   ======================================== */
.auth-error {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-md);
    background-color: #fff2f0;
    border: 1px solid #ffccc7;
    border-radius: var(--radius-md);
    animation: shake 0.5s ease-in-out;
}

.auth-error .alert-icon {
    flex-shrink: 0;
    font-size: 16px;
}

.auth-error .alert-message {
    font-size: var(--font-size-sm);
    color: #a8071a;
    line-height: 1.5;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-4px); }
    20%, 40%, 60%, 80% { transform: translateX(4px); }
}

/* ========================================
   Auth Success Alert
   ======================================== */
.auth-success {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-md);
    background-color: #f6ffed;
    border: 1px solid #b7eb8f;
    border-radius: var(--radius-md);
}

.auth-success .alert-icon {
    flex-shrink: 0;
    font-size: 16px;
}

.auth-success .alert-message {
    font-size: var(--font-size-sm);
    color: #135200;
    line-height: 1.5;
}

/* ========================================
   Auth Button
   ======================================== */
.auth-form .btn-block {
    position: relative;
    height: 48px;
    font-size: var(--font-size-base);
}

.auth-form .btn-text,
.auth-form .btn-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.auth-form .btn-loading .spinner {
    border-top-color: var(--text-inverse);
}

/* ========================================
   Auth Features
   ======================================== */
.auth-features {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
}

.auth-feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.auth-feature .feature-icon {
    font-size: 24px;
}

.auth-feature .feature-text {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

/* ========================================
   Auth Footer
   ======================================== */
.auth-footer {
    padding: var(--spacing-md) 0;
    text-align: center;
}

.auth-footer .copyright {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin: 0;
}

/* ========================================
   Password Strength Indicator
   ======================================== */
.password-strength {
    margin-top: var(--spacing-xs);
}

.password-strength-bar {
    height: 4px;
    background-color: var(--gray-4);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
}

.password-strength-fill {
    height: 100%;
    width: 0;
    border-radius: 2px;
    transition: width var(--transition-normal), background-color var(--transition-normal);
}

.password-strength-fill.weak {
    width: 33%;
    background-color: var(--error-color);
}

.password-strength-fill.medium {
    width: 66%;
    background-color: var(--warning-color);
}

.password-strength-fill.strong {
    width: 100%;
    background-color: var(--success-color);
}

.password-strength-text {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.password-strength-text.weak {
    color: var(--error-color);
}

.password-strength-text.medium {
    color: var(--warning-color);
}

.password-strength-text.strong {
    color: var(--success-color);
}

/* ========================================
   Form Validation States
   ======================================== */
.auth-form .form-control.is-valid {
    border-color: var(--success-color);
}

.auth-form .form-control.is-valid:focus {
    box-shadow: 0 0 0 2px rgba(82, 196, 26, 0.2);
}

.auth-form .input-group:has(.form-control.is-invalid) .input-group-text {
    border-color: var(--error-color);
}

.auth-form .input-group:has(.form-control.is-valid) .input-group-text {
    border-color: var(--success-color);
}

.valid-feedback {
    display: none;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: var(--success-color);
}

.form-control.is-valid ~ .valid-feedback {
    display: block;
}

/* ========================================
   Divider
   ======================================== */
.auth-divider {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background-color: var(--border-color);
}

.auth-divider-text {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

/* ========================================
   Responsive Styles
   ======================================== */
@media (max-width: 479px) {
    .auth-main {
        padding: var(--spacing-md);
    }
    
    .auth-card-header {
        padding: var(--spacing-lg) var(--spacing-md) var(--spacing-sm);
    }
    
    .auth-card-body {
        padding: var(--spacing-sm) var(--spacing-md) var(--spacing-lg);
    }
    
    .auth-card-footer {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .auth-title {
        font-size: var(--font-size-xl);
    }
    
    .auth-features {
        gap: var(--spacing-md);
    }
    
    .auth-feature .feature-icon {
        font-size: 20px;
    }
    
    .auth-feature .feature-text {
        font-size: 10px;
    }
}