/* 首页登录/注册弹窗（与 common.css 变量一致） */
#authModal.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(4px);
    z-index: 10000;
    justify-content: center;
    align-items: center;
}
#authModal.modal.active {
    display: flex;
    animation: authFadeIn 0.25s ease;
}
@keyframes authFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
#authModal .modal-content {
    background: var(--bg-color);
    border-radius: 16px;
    padding: 28px 32px 32px;
    width: 90%;
    max-width: 420px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-hard);
    position: relative;
}
#authModal .modal-tabs {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 24px;
}
#authModal .modal-tab {
    padding: 8px 16px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 400;
    border-bottom: 2px solid transparent;
}
#authModal .modal-tab.active {
    color: var(--text-main);
    border-bottom-color: var(--accent);
}
#authModal .form-group {
    margin-bottom: 16px;
}
#authModal .form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text-main);
}
#authModal .password-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
}
#authModal .password-input-wrapper input,
#authModal .form-group input {
    width: 100%;
    padding: 12px 44px 12px 12px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-main);
}
#authModal .form-group input:not(.password-input-wrapper input) {
    padding: 12px;
}
#authModal .form-group input:focus,
#authModal .password-input-wrapper input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(116, 123, 255, 0.2);
}
#authModal .toggle-password {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    padding: 4px;
    color: var(--text-muted);
}
#authModal .checkbox-group {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 12px 0 20px;
}
#authModal .checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
    cursor: pointer;
}
#authModal .checkbox-group label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
    cursor: pointer;
}
#authModal .submit-btn {
    width: 100%;
    padding: 12px;
    border-radius: 10px;
    border: 1px solid transparent;
    background: var(--accent);
    color: #fff;
    font-size: 1rem;
    font-weight: 400;
    cursor: pointer;
    transition: var(--transition-bounce);
}
#authModal .submit-btn:hover {
    filter: brightness(0.95);
}
#authModal .close-modal {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}
#authModal .tab-content {
    display: none;
}
#authModal .tab-content.active {
    display: block;
}