/* auth.css - 登录 & 注册 共用样式 */

.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
    padding: 40px 20px;
    position: relative;
    overflow: hidden;
}
/* 背景装饰 */
.auth-page::before {
    content: "";
    position: absolute;
    top: -100px; right: -100px;
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(16,152,173,.12) 0%, transparent 70%);
    border-radius: 50%;
}
.auth-page::after {
    content: "";
    position: absolute;
    bottom: -80px; left: -80px;
    width: 300px; height: 300px;
    background: radial-gradient(circle, rgba(229,57,53,.08) 0%, transparent 70%);
    border-radius: 50%;
}

/* 卡片 */
.auth-card {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 460px;
    overflow: hidden;
    position: relative;
    z-index: 1;
    border-top: 4px solid var(--color-primary);
}
.auth-card.register-card { border-top-color: var(--color-secondary); }

/* 卡片头部 */
.auth-card-header {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    padding: 32px 40px 28px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.auth-card.register-card .auth-card-header {
    background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-dark));
}
.auth-card-header::before {
    content: "";
    position: absolute;
    top: -30px; right: -30px;
    width: 120px; height: 120px;
    background: rgba(255,255,255,.08);
    border-radius: 50%;
}
.auth-card-header .auth-logo {
    width: 60px; height: 60px;
    background: #fff;
    border-radius: 14px;
    padding: 6px;
    margin: 0 auto 14px;
    box-shadow: 0 4px 14px rgba(0,0,0,.15);
}
.auth-card-header h2 {
    font-size: 24px;
    letter-spacing: 2px;
    margin-bottom: 6px;
}
.auth-card-header p {
    font-size: 13px;
    opacity: .85;
}
.auth-card-header .auth-swap {
    position: absolute;
    top: 16px; right: 20px;
    font-size: 12px;
    opacity: .75;
}
.auth-card-header .auth-swap a {
    color: #ffd700;
    font-weight: 600;
    text-decoration: underline;
}
.auth-card-header .auth-swap a:hover { opacity: .8; }

/* 切换标签 */
.auth-tabs {
    display: flex;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}
.auth-tab {
    flex: 1;
    padding: 14px;
    text-align: center;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-light);
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 2px solid transparent;
    user-select: none;
}
.auth-tab:hover { color: var(--color-primary); }
.auth-tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    background: #fff;
}
.auth-tab.active.reg { color: var(--color-secondary); border-bottom-color: var(--color-secondary); }

/* 表单区域 */
.auth-card-body {
    padding: 30px 40px 36px;
}

/* 输入框组 */
.form-group {
    margin-bottom: 20px;
}
.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}
.form-label i { color: var(--color-primary); margin-right: 4px; }
.form-input-wrap {
    position: relative;
}
.form-input-wrap .input-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-primary);
    font-size: 16px;
    z-index: 1;
    pointer-events: none;
}
.form-input-wrap input {
    width: 100%;
    padding: 12px 14px 12px 44px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 15px;
    color: var(--color-text);
    background: var(--color-bg);
    transition: var(--transition);
    box-sizing: border-box;
}
.form-input-wrap input:focus {
    border-color: var(--color-primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(16,152,173,.12);
}
.form-input-wrap input.error {
    border-color: var(--color-accent);
}
.form-input-wrap input.error:focus {
    box-shadow: 0 0 0 3px rgba(229,57,53,.12);
}
.form-input-wrap input.success {
    border-color: #34a853;
}
.form-input-wrap .input-icon-right {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 14px;
    cursor: pointer;
    color: var(--color-text-light);
}
.form-input-wrap .input-icon-right:hover { color: var(--color-primary); }

.form-error {
    font-size: 12px;
    color: var(--color-accent);
    margin-top: 6px;
    display: flex;
    align-items: center;
    gap: 4px;
}

/* 密码强度 */
.password-strength {
    display: flex;
    gap: 4px;
    margin-top: 8px;
}
.strength-bar {
    flex: 1;
    height: 4px;
    border-radius: 2px;
    background: var(--color-border);
    transition: var(--transition);
}
.strength-bar.active:nth-child(1) { background: var(--color-accent); }
.strength-bar.active:nth-child(2) { background: var(--color-orange); }
.strength-bar.active:nth-child(3) { background: #34a853; }
.strength-text {
    font-size: 11px;
    color: var(--color-text-light);
    margin-top: 4px;
}
.strength-text strong { font-weight: 700; }
.strength-text .weak strong { color: var(--color-accent); }
.strength-text .medium strong { color: var(--color-orange); }
.strength-text .strong strong { color: #34a853; }

/* 记住我 & 忘记密码 */
.form-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 22px;
    font-size: 13px;
}
.remember-me {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    color: var(--color-text-light);
}
.remember-me input[type="checkbox"] {
    width: 16px; height: 16px;
    accent-color: var(--color-primary);
    cursor: pointer;
}
.forgot-link {
    color: var(--color-primary);
    font-weight: 600;
}
.forgot-link:hover { text-decoration: underline; }

/* 协议勾选 */
.form-agree {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 22px;
    font-size: 13px;
    color: var(--color-text-light);
}
.form-agree input[type="checkbox"] {
    width: 16px; height: 16px;
    accent-color: var(--color-primary);
    cursor: pointer;
    flex-shrink: 0;
    margin-top: 3px;
}
.form-agree a {
    color: var(--color-primary);
    font-weight: 600;
}
.form-agree a:hover { text-decoration: underline; }

/* 提交按钮 */
.btn-auth-submit {
    width: 100%;
    padding: 14px;
    font-size: 16px;
    letter-spacing: 2px;
}

/* 分隔线 */
.auth-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 22px 0;
    font-size: 12px;
    color: var(--color-text-light);
}
.auth-divider::before, .auth-divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--color-border);
}

/* 其他登录方式 */
.auth-third-party {
    display: flex;
    justify-content: center;
    gap: 16px;
}
.third-party-btn {
    width: 46px; height: 46px;
    border-radius: 50%;
    border: 2px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--color-text-light);
    cursor: pointer;
    transition: var(--transition);
    background: var(--color-bg);
}
.third-party-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-3px);
}

/* 底部提示 */
.auth-footer {
    text-align: center;
    padding: 16px 40px 24px;
    font-size: 13px;
    color: var(--color-text-light);
    border-top: 1px solid var(--color-border);
}
.auth-footer a {
    color: var(--color-primary);
    font-weight: 600;
}
.auth-footer a:hover { text-decoration: underline; }

/* 健康游戏公告 */
.auth-health {
    text-align: center;
    padding: 14px 40px 18px;
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    font-size: 12px;
    color: var(--color-text-light);
}
.auth-health i { color: var(--color-primary); margin-right: 4px; }

/* 响应式 */
@media (max-width: 500px) {
    .auth-card-header { padding: 26px 24px 22px; }
    .auth-card-header h2 { font-size: 20px; }
    .auth-card-body { padding: 24px 24px 30px; }
    .auth-tabs .auth-tab { padding: 12px 8px; font-size: 13px; }
}