/* ============================================
   找回密码页面 - 现代化视觉设计
   设计原则：
   1. 深色玻璃拟态风格，与登录页、注册页保持一致
   2. 品牌色：青色渐变 #00d4ff → #0099cc
   3. 圆角卡片、柔和阴影、流畅过渡
   4. 响应式适配多设备
   ============================================ */

/* ---- 基础重置与变量定义 ---- */
:root {
    /* 品牌色彩系统 */
    --brand-primary: #00d4ff;
    --brand-secondary: #0099cc;
    --brand-gradient: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
    --brand-glow: rgba(0, 212, 255, 0.3);
    
    /* 背景与表面色 */
    --bg-dark: #0f172a;
    --bg-card: rgba(15, 23, 42, 0.75);
    --bg-glass: rgba(255, 255, 255, 0.08);
    --bg-glass-hover: rgba(255, 255, 255, 0.12);
    --bg-input: rgba(255, 255, 255, 0.06);
    --bg-input-focus: rgba(255, 255, 255, 0.1);
    
    /* 文字色彩 */
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-brand: #00d4ff;
    
    /* 边框与分隔 */
    --border-glass: rgba(255, 255, 255, 0.1);
    --border-brand: rgba(0, 212, 255, 0.3);
    --border-focus: rgba(0, 212, 255, 0.5);
    
    /* 状态色彩 */
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.15);
    --error: #ef4444;
    --error-bg: rgba(239, 68, 68, 0.15);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.15);
    
    /* 阴影系统 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.45);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.2);
    
    /* 圆角系统 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* 间距系统 */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    
    /* 过渡动画 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ---- 页面基础样式 ---- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: url('/static/img/login_bj.png') no-repeat center center fixed;
    background-size: cover;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Microsoft YaHei', 'PingFang SC', -apple-system, BlinkMacSystemFont, sans-serif;
    padding: 20px;
    position: relative;
    overflow-x: hidden;
}

/* 背景遮罩层 - 渐变暗化 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse at 50% 0%, rgba(0, 212, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 100%, rgba(0, 153, 204, 0.05) 0%, transparent 50%),
        rgba(15, 23, 42, 0.82);
    z-index: -1;
    backdrop-filter: blur(2px);
}

/* 背景装饰光效 */
body::after {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 30% 20%, rgba(0, 212, 255, 0.03) 0%, transparent 40%),
        radial-gradient(circle at 70% 80%, rgba(0, 153, 204, 0.03) 0%, transparent 40%);
    z-index: -1;
    animation: bgFloat 20s ease-in-out infinite;
}

@keyframes bgFloat {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(2%, 2%) rotate(1deg); }
    66% { transform: translate(-1%, 1%) rotate(-1deg); }
}

/* ---- 卡片容器样式 - 玻璃拟态 ---- */
.recovery-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    width: 100%;
    max-width: 460px;
    border: 1px solid var(--border-glass);
    box-shadow: 
        var(--shadow-lg),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
    position: relative;
    overflow: hidden;
    animation: cardEnter 0.6s ease-out;
}

/* 卡片顶部品牌光条 */
.recovery-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--brand-gradient);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

/* 卡片角落装饰 */
.recovery-card::after {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

@keyframes cardEnter {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ---- 标题区域 ---- */
.title-section {
    text-align: center;
    margin-bottom: var(--space-lg);
    position: relative;
}

.recovery-title {
    color: var(--text-primary);
    font-size: 28px;
    font-weight: 700;
    margin-bottom: var(--space-xs);
    letter-spacing: 2px;
    background: var(--brand-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.recovery-subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 1px;
}

/* 标题装饰线 */
.title-section::after {
    content: '';
    display: block;
    width: 40px;
    height: 3px;
    background: var(--brand-gradient);
    border-radius: 2px;
    margin: var(--space-md) auto 0;
    opacity: 0.6;
}

/* ---- 表单区域 ---- */
.form-group {
    margin-bottom: var(--space-md);
    position: relative;
}

.form-label {
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    margin-bottom: var(--space-xs);
    display: block;
    letter-spacing: 0.5px;
    transition: color var(--transition-fast);
}

/* 标签品牌色高亮（必填项） */
.form-label .required {
    color: var(--brand-primary);
    margin-left: 2px;
}

.form-group:focus-within .form-label {
    color: var(--text-brand);
}

/* 输入框样式 - 现代化设计 */
.form-control {
    background: var(--bg-input);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    padding: 12px 16px;
    font-size: 14px;
    width: 100%;
    transition: all var(--transition-normal);
    outline: none;
}

.form-control:hover {
    border-color: rgba(255, 255, 255, 0.2);
    background: var(--bg-glass-hover);
}

.form-control:focus {
    background: var(--bg-input-focus);
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--brand-glow), 0 0 20px rgba(0, 212, 255, 0.1);
    transform: translateY(-1px);
}

.form-control::placeholder {
    color: var(--text-muted);
    font-size: 13px;
}

/* 输入框图标装饰 */
.input-wrapper {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    transition: color var(--transition-normal);
    pointer-events: none;
    z-index: 1;
}

.form-group:focus-within .input-icon {
    color: var(--brand-primary);
}

.input-with-icon {
    padding-left: 42px !important;
}

/* 密码可见性切换按钮 */
.password-toggle {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    transition: color var(--transition-fast);
    z-index: 1;
}

.password-toggle:hover {
    color: var(--text-primary);
}

/* 密钥输入框特殊样式 */
.key-input {
    font-family: 'Courier New', 'Monaco', monospace;
    letter-spacing: 3px;
    font-size: 15px;
    text-align: center;
    text-transform: uppercase;
}

.key-input::placeholder {
    letter-spacing: 1px;
    text-transform: none;
}

/* 密钥输入框焦点特效 */
.key-input:focus {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(0, 153, 204, 0.05) 100%);
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px var(--brand-glow), var(--shadow-glow);
}

/* ---- 信息提示文字 ---- */
.info-text {
    color: var(--text-muted);
    font-size: 12px;
    margin-top: var(--space-xs);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.info-text svg {
    color: var(--brand-primary);
    opacity: 0.7;
}

.contact-link {
    color: var(--brand-primary);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: all var(--transition-fast);
}

.contact-link::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--brand-primary);
    transition: width var(--transition-normal);
}

.contact-link:hover {
    color: #33ddff;
}

.contact-link:hover::after {
    width: 100%;
}

/* ---- 提交按钮 - 品牌渐变 ---- */
.btn-primary-custom {
    background: var(--brand-gradient);
    border: none;
    color: #fff;
    padding: 14px 24px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    width: 100%;
    margin-top: var(--space-md);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    letter-spacing: 1px;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
}

/* 按钮光泽效果 */
.btn-primary-custom::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 0.5s ease;
}

.btn-primary-custom:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.4);
}

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

.btn-primary-custom:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(0, 212, 255, 0.3);
}

/* 按钮加载状态 */
.btn-primary-custom.loading {
    pointer-events: none;
    opacity: 0.8;
}

.btn-primary-custom.loading::after {
    content: '';
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    margin-left: 8px;
    animation: spin 0.8s linear infinite;
    vertical-align: middle;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ---- 底部链接区域 ---- */
.form-footer {
    text-align: center;
    margin-top: var(--space-lg);
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-glass);
    color: var(--text-muted);
    font-size: 13px;
}

.form-footer p {
    margin-bottom: var(--space-xs);
}

.form-footer a {
    color: var(--brand-primary);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: all var(--transition-fast);
}

.form-footer a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--brand-primary);
    transition: width var(--transition-normal);
}

.form-footer a:hover {
    color: #33ddff;
}

.form-footer a:hover::after {
    width: 100%;
}

/* ---- 消息提示样式 - 现代化设计 ---- */
.message-area {
    margin-bottom: var(--space-md);
    animation: messageSlide 0.3s ease-out;
}

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

.alert-custom {
    background: var(--error-bg);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.alert-success-custom {
    background: var(--success-bg);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #6ee7b7;
}

.alert-warning-custom {
    background: var(--warning-bg);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #fcd34d;
}

.alert-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* ---- 密码强度指示器 ---- */
.password-strength {
    margin-top: var(--space-xs);
    height: 3px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    overflow: hidden;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.password-strength.visible {
    opacity: 1;
}

.password-strength-bar {
    height: 100%;
    border-radius: 2px;
    transition: all var(--transition-normal);
    width: 0;
}

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

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

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

.password-strength-text {
    font-size: 11px;
    margin-top: 2px;
    color: var(--text-muted);
    text-align: right;
}

/* ---- 表单验证状态 ---- */
.form-control.is-valid {
    border-color: var(--success);
    background: rgba(16, 185, 129, 0.05);
}

.form-control.is-invalid {
    border-color: var(--error);
    background: rgba(239, 68, 68, 0.05);
}

.validation-message {
    font-size: 12px;
    margin-top: var(--space-xs);
    color: var(--error);
    display: flex;
    align-items: center;
    gap: 4px;
    animation: shake 0.3s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* ---- 隐藏元素 ---- */
.d-none {
    display: none !important;
}

/* ---- 响应式适配 ---- */
@media (max-width: 576px) {
    body {
        padding: 16px;
        align-items: flex-start;
        padding-top: 40px;
    }
    
    .recovery-card {
        padding: var(--space-lg);
        border-radius: var(--radius-lg);
    }
    
    .recovery-title {
        font-size: 24px;
    }
    
    .recovery-subtitle {
        font-size: 13px;
    }
    
    .form-control {
        padding: 10px 14px;
        font-size: 16px; /* 防止iOS缩放 */
    }
    
    .btn-primary-custom {
        padding: 12px 20px;
        font-size: 14px;
    }
}

@media (max-width: 360px) {
    .recovery-card {
        padding: var(--space-md);
    }
    
    .recovery-title {
        font-size: 22px;
    }
}

/* 平板适配 */
@media (min-width: 577px) and (max-width: 768px) {
    .recovery-card {
        max-width: 420px;
    }
}

/* 大屏优化 */
@media (min-width: 1200px) {
    .recovery-card {
        max-width: 480px;
        padding: 40px 48px;
    }
}

/* ---- 减少动画偏好 ---- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    body::after {
        animation: none;
    }
}

/* ---- 暗色模式优化（系统级） ---- */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-card: rgba(15, 23, 42, 0.85);
    }
}